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+ | <div class="clickable"> | ||
+ | <div class="header-img hide-on-med-and-down"> | ||
+ | <img src="https://static.igem.org/mediawiki/2018/9/92/T--NTNU_Trondheim--labjournalheader.png"> | ||
+ | <div class="centered floating hide-on-med-and-down"> | ||
+ | <i class="fas fa-angle-down fa-2x"></i> | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | |||
+ | <div class="clickable"> | ||
+ | <div class="header-img hide-on-large-only "> | ||
+ | <img src="https://static.igem.org/mediawiki/2018/d/df/T--NTNU_Trondheim--labjournalmobile.png"> | ||
+ | <div class="centered-mobile floating hide-on-large-only"> | ||
+ | <i class="fas fa-angle-down fa-2x"></i> | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
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<div class="container"> | <div class="container"> | ||
− | < | + | <div class="headertext" style="padding-left: 50px; padding-right: 50px"> |
− | <p><br></p> | + | <p style="text-align: center">In our lab journal we have thoroughly documented what we have done in the laboratory, what our goals each session has been, how we have worked and results from each session. If you want a closer look on our methods/receipies, take a look at our protocol.</p> |
+ | </div> | ||
+ | |||
+ | |||
+ | <p><br><br><br></p> | ||
<!------------------------------------------- WHOLE NOTEBOOK ---------------------------------------------> | <!------------------------------------------- WHOLE NOTEBOOK ---------------------------------------------> | ||
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</div> | </div> | ||
</div> | </div> | ||
− | <p style="font-size: | + | <p style="font-size:120%;">Week 25</p></div> |
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
<!----------------------------------------- DAYS IN WEEK -------------------------------------------> | <!----------------------------------------- DAYS IN WEEK -------------------------------------------> | ||
− | <ul class="collapsible"> | + | <ul class="collapsible"> |
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</div> | </div> | ||
</div> | </div> | ||
− | <p | + | <p>Our first day in the laboratory!</p></div> |
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− | < | + | <br> <div class="collapsible-body"><span> |
− | < | + | <b>Goal:</b> Incubate the Escherichia coli (E. coli) samples which carry pgRNA and pdCas9 on agar plates separately with antibiotics.<br> |
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<br> | <br> | ||
− | + | 1. LA- medium (1.5%) was made. | |
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<br> | <br> | ||
+ | 2. Two different agar plates were made – one containing ampicillin (AMP) and one containing chloramphenicol (CM). | ||
<br> | <br> | ||
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<br> | <br> | ||
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<b>Incubation of bacteria </b> | <b>Incubation of bacteria </b> | ||
<br> | <br> | ||
− | + | Two Escherichia coli (E. coli) samples which carry pgRNA and pdCas9 plasmids respectively, were ordered from Addgene. E.coli carrying the pgRNA plasmid were plated on agar plates with AMP, while E.coli carrying the pdCas9 plasmid were plated on agar plates with CM. Incubation for 24 h at 37℃. | |
− | Two Escherichia coli (E. coli) samples which carry pgRNA and pdCas9 plasmids respectively, were ordered from Addgene. E.coli | + | |
<br> | <br> | ||
<br> | <br> | ||
− | Results : | + | <b>Results: </b> |
<br> | <br> | ||
− | + | There was growth and single colonies on all the plates. | |
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− | + | ||
</span></div> | </span></div> | ||
</li> | </li> | ||
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</div> | </div> | ||
</div> | </div> | ||
− | <p | + | <p>Inoculation of E.coli</p></div> |
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
− | <b>Goal:</b> Inoculate a colony from each agar plate | + | <b>Goal:</b> Inoculate a colony from each agar plate in LB- medium with antibiotics. <br> |
<br> | <br> | ||
<b>Procedure</b> <br> | <b>Procedure</b> <br> | ||
− | One colony of pgRNA- and pdCas9- bacteria | + | One colony of pgRNA- and pdCas9- bacteria were picked and inoculated in LB-media (25 mL) with 25 µL of the associated antibiotic (AMP or CM). The cell cultures were incubated at 37℃ in a shaking incubator at 204 rpm. <br> |
</span></div> | </span></div> | ||
</li> | </li> | ||
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</div> | </div> | ||
</div> | </div> | ||
− | <p | + | <p>Isolation and verification of pgRNA and pdCas9</p></div> |
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
<b>Goal:</b> Isolate and verify that the E.coli carry pgRNA and pdCas9.<br> | <b>Goal:</b> Isolate and verify that the E.coli carry pgRNA and pdCas9.<br> | ||
<br> | <br> | ||
<b>Plasmid isolation</b><br> | <b>Plasmid isolation</b><br> | ||
− | pgRNA and pdCas9 were isolated from the incubated bacteria prepared yesterday (June 21) by following the protocol | + | pgRNA and pdCas9 were isolated from the incubated bacteria prepared yesterday (June 21) by following the miniprep protocol.<br> |
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− | <br> | + | |
<b>Determine plasmid concentration and purity</b><br> | <b>Determine plasmid concentration and purity</b><br> | ||
The concentration of plasmids and the purity of each sample were determined by using Nanodrop.<br> | The concentration of plasmids and the purity of each sample were determined by using Nanodrop.<br> | ||
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</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p style="font-size:120%;">Week 26</p></div> |
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
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</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Transformation of pgRNA and pdCas9 into competent cells</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <b>Goal:</b> Transform pgRNA and pdCas9 into competent cells (E.coli K-12 DH5α).<br> | ||
+ | <br> | ||
+ | <b>Procedure:</b><br> | ||
+ | The extracted pgRNA and pdCas9 plasmid DNA were transformed into E.coli K-12 DH5α cells. | ||
+ | <br> | ||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
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</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Transfer successful transformed cells to LB-medium and preparation of standard curves for the InterLab study</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <b>Goal:</b> | ||
+ | <br> | ||
+ | Inoculate successful transformed competent cells to LB-medium, and prepare the standard curves for InterLab study. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | <u>Inoculate colony from agar plates to LB-medium:</u> | ||
+ | <br> | ||
+ | A colony from each agar plate was selected and inoculated to LB- medium with antibiotics. Competent cells with pgRNA were transferred to LB- medium with AMP, while competent cells with pdCas9 were inoculated into LB- medium with CM. The cell cultures were incubated at 37℃ with shaker. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Preparation of 1xPBS solution for the InterLab-study.</u> | ||
+ | <br> | ||
+ | <u>Preparation of agar plates with CM, LA- and LB-medium.</u> | ||
+ | <br> | ||
+ | <u>Preparation of standard curves for InterLab study:</u> | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Calibration 1:</u> OD 600 reference point – LUDOX protocol | ||
+ | <br> | ||
+ | A conversion factor to transform absorbance data from plate reader into OD600 was obtained in spectrometer by measuring four replicates of LUDOX CL-X and ddH<sub>2</sub>O. The data were imported into Excel sheet. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Calibration 2:</u> Particle standard curve – Microsphere protocol | ||
+ | <br> | ||
+ | The solution of silica beads provided in the kit from iGEM HQ, was vortexed before dilution with water (96 μL Silica beads in 904 μL dd H<sub>2</sub>O). A serial dilution of microspheres was obtained by adding 100 μL dd H<sub>2</sub>O into 4x11 wells (E2, F2, G2, H2…E12, F12, G12, H12) on a 96 well plate. Microsphere stock solution (200 μL) was pipetted into E1 and 100 μL of the solution was transferred to E2 and mixed well before transferring 100 μL to E3. The procedure repeated until 100 μL solution was pipetted into E11, and 100 μL was transferred to liquid waste. The dilution series was repeated for row F, G and H. The absorbance of the samples was measured by a plate reader with shaker at 24℃. The data were exported to Excel sheet. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Results:</b> | ||
+ | <br> | ||
+ | Sett inn bilde her. | ||
+ | |||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
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</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Isolation of pgRNA and pdCas9 from compentent cells (DH5α) and preparation of stock solution for calibration 3 for InterLab study</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <b>Goal:</b> | ||
+ | <br> | ||
+ | Isolate plasmids from competent cells (DH5α), and prepare the fluorecein stock solution for InterLab study. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | |||
+ | <u>Dilution of cell cultures:</u> | ||
+ | <br> | ||
+ | |||
+ | Each cell cultures (successful transformed competent cells from day 5 – 26.06.2018) (2.5 mL) were transferred into fresh LB-medium (22.5 mL) with CM (22.5 μL). The new cultures were incubated for about 2 hours at 37℃ with shaking . | ||
+ | <br> | ||
+ | <br> | ||
+ | |||
+ | <u>Measurement of the cell density:</u> | ||
+ | <br> | ||
+ | |||
+ | The cell density of the new cultures was measured at OD 600, after calibration with water (blank sample). | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Plasmid isolation and determination of concentration:</u> | ||
+ | <br> | ||
+ | |||
+ | The plasmids were isolated from the competent cell after the protocol of ZR plasmid miniprep kit (see lab journal from day 3 - 22. June. 2018). | ||
+ | <br> | ||
+ | |||
+ | The concentration of the plasmids was determined by using Nanodrop. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Restriction digest:</u> | ||
+ | <br> | ||
+ | |||
+ | The plasmids from each culture (5 μL) were digested by mixing with 10xbuffer (2 μL), distilled water (12.5 μL) and restriction enzyme BspHI (0.5 μL). The solution was centrifuged down before the samples were incubated over night at 37℃. | ||
+ | <br> | ||
+ | <br> | ||
+ | |||
+ | <b>Results:</b> | ||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
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</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Plasmid verification and storing the cell cultures</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <b>Goal:</b> | ||
+ | <br> | ||
+ | Verify that the successfully transformed DH5α cells carry pgRNA or pdCas9, and store the cell cultures for future use. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | <u>Plasmid verification:</u> | ||
+ | <br> | ||
+ | The digested plasmid samples from yesterday’s incubation (lab 6 – 27. June.2018) were separated by gel electrophoresis. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Bacteria glycerol stocks:</u> | ||
+ | <br> | ||
+ | |||
+ | The cell cultures made from 27. June were stored in a glycerol stock (500 µL cell culture and 500 µL 50% glycerol) in the freezer at -80℃. | ||
+ | <br> | ||
+ | <b>Results:</b> | ||
+ | <br> | ||
+ | |||
+ | |||
+ | <u>Plasmid verification:</u> | ||
+ | <br> | ||
+ | L, pR1, pR2, pC1 and pC2 are the DNA-fragments from ladder solution, the two samples of pgRNA and pdCas9, respectively. From <b>Figure 1</b> the two fragments with 1.5 kb and 1.0 kb were found from the fragments of pgRNA after digestion by BspHI. The fragment with 100 bp from the digested pgRNA is not visible on the gel, probably due to masking of the dye colour at the bottom of the gel. Two bands from the digested pdCas9 with 2.7 kb and 4 kb were also detected. By comparing the results og gel elecrophoresis obtained from today's experiment with the results from day 3 (22. June. 2018), one can clearly see that the bands with the expected length from successful transformed competent cells, are much clearer. Hence, this also indicate the samples from the successful transformed DH5α cells are purer, which is also true by comparing the results from Nanodrop (see day 6 - 27. June. 2018, and day 3 - 22. June. 2018). | ||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
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</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Insertion of anti-luxS via PCR and fluorescence standard curve for InterLab study</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <b>Goal:</b> | ||
+ | <br> | ||
+ | |||
+ | Insert anti-luxS in pgRNA plasmid, and generate fluorescence standard curve for the InterLab study. | ||
+ | <br> | ||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | <u>Insertion of anti-luxS gene and amplification of pgRNA with PCR.</u> | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>InterLab – Calibration 3</u> | ||
+ | <br> | ||
+ | A fluorescence standard curve was generated from the data obtained after measuring the fluorescence of the serial dilution of fluorescein. | ||
+ | <br> | ||
+ | <br> | ||
+ | The fluorescence was measured with the following settings: | ||
+ | <br> | ||
+ | <br> | ||
+ | Temperature: 24℃ | ||
+ | <br> | ||
+ | <br> | ||
+ | Gain (manual): 56 | ||
+ | <br> | ||
+ | <br> | ||
+ | <table style="width:50%"> | ||
+ | <tr> | ||
+ | <th></th> | ||
+ | <th>Wave length [nm]</th> | ||
+ | <th>Band width [nm]</th> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>Excitation</td> | ||
+ | <td>494</td> | ||
+ | <td>4</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>Emission</td> | ||
+ | <td>525</td> | ||
+ | <td>20</td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | |||
+ | |||
+ | <br> | ||
+ | <b>Results:</b> | ||
+ | <br> | ||
+ | <u>InterLab – Calibration 3:</u> | ||
+ | <br> | ||
+ | |||
+ | Figure 1 shows the florescence standard curve in the concentration interval [0, 2.5 μM], with a R<sup>2</sup> value of 0,9956. The model of the fluorescence standard curve is: | ||
+ | </span></div> | ||
</li> | </li> | ||
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</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p style="font-size:120%;">Week 27</p></div> |
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
<!----------------------------------------- DAYS IN WEEK -------------------------------------------> | <!----------------------------------------- DAYS IN WEEK -------------------------------------------> | ||
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</div> | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
− | + | 2 | |
</div> | </div> | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Separation, isolation and transformation of linear DNA (pgRNA with anti-luxS)</p></div> |
− | <div class="collapsible-body"><span></span></div> | + | <div class="collapsible-body"><span> |
+ | <b>Goal:</b> | ||
+ | <br> | ||
+ | <ol> | ||
+ | <li> Separate the PCR product from circular DNA</li> | ||
+ | |||
+ | <li>Isolate the linear DNA (pgRNA with anti-luxS from the gel</li> | ||
+ | |||
+ | <li>Transform the linear DNA into competent cells</li> | ||
+ | |||
+ | <li>InterLab study - transformation of plasmids to competent cells</li> | ||
+ | </ol> | ||
+ | <br> | ||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | <u>Separation of linear DNA from circular DNA:</u> | ||
+ | <br> | ||
+ | The leaner DNA obtained from PCR (from day 8 – 29. June. 2018), was separated from the circular DNA (original plasmids) after running the sample (25 μL) mixed with loading dye (5 μl) on gel electrophoresis (gelGreen) simultaneously with a ladder (1 μL gene ruler + 1 μL loading dye + 4 μL dH<sub>2</sub>O) for 50 min at 90 V. The sample and the ladder were prepared by the gel electrophoresis protocol. | ||
+ | |||
+ | <br> | ||
+ | <br> | ||
+ | |||
+ | <u>Gel digestion and DNA isolation:</u> | ||
+ | <br> | ||
+ | The agarose was digested and the DNA was isolated from the sample following the gel purification protocol. | ||
+ | <br> | ||
+ | <u>Determine the DNA concentration and purity:</u> | ||
+ | <br> | ||
+ | The concentration and the purity of the isolated DNA was determined by using Nanodrop. | ||
+ | <br> | ||
+ | <br> | ||
+ | |||
+ | <u>Transformation of PCR product to competent cells:</u> | ||
+ | The PCR product (5 μL) was transformed to competent cells after following the transformation protocol. | ||
+ | <br> | ||
+ | <u>InterLab – transformation of plasmids to competent cells:</u> | ||
+ | <br> | ||
+ | The plasmids listed on the protocol, was transformed into competent cells (DH5α) after the following protocol: | ||
+ | <br> | ||
+ | <ol> | ||
+ | <li>Thaw the competent cells on ice (10 min), and pre-chill the eppendorf tubes.</li> | ||
+ | <li>Resuspend the DNA in the wells (provided by iGEM HQ) with dH<sub>2</sub>O (10 μL).</li> | ||
+ | <li>Add competent cells (50 μL) to the eppendorf tubes.</li> | ||
+ | <li>Add resuspended DNA (1 μL) to the Eppendorf tubes.</li> | ||
+ | <li>Incubate on ice for 25 min</li> | ||
+ | <li>Heat shock the cells for 45 s at 42℃ in water bath</li> | ||
+ | <li>Incubate on ice for 5 min.</li> | ||
+ | <li>Add LB-medium (950μL) to the tubes</li> | ||
+ | <li>Incubate for 1h at 37℃ with shacker</li> | ||
+ | <li>Pipette each sample (100 μL) to agar plate with CM</li> | ||
+ | <li>Centrifuge the samples for 3 min at 6800g, discard supernatant (800 μL) and resuspend the pellet with the remaining supernatant</li> | ||
+ | <li>Pipette each sample (100 μL) to agar plate with CM</li> | ||
+ | <li>Incubate overnight at 37℃.</li> | ||
+ | </ol> | ||
+ | <br> | ||
+ | |||
+ | <b>Results:</b> | ||
+ | <br> | ||
+ | <u>Separation of linear DNA from circular DNA:</u> | ||
+ | <br> | ||
+ | |||
+ | <b>Figure 1</b> shows the image of the gel where the linearized DNA was separated from the circular DNA. The linearized DNA is approximately 2 kb. The linearized DNA fragment was then cut out from the gel and stored in eppendorf tube. | ||
+ | <br> | ||
+ | <br> | ||
+ | Note! Due to UV-light exposure, the DNA may mutate. In this case, this may affect the later steps of our project. The worse scenario, mutation of anti-luxS. Hence our CSRPRi system may not recognize luxS in the bacteria. Biofilm production will not be inhibited… | ||
+ | |||
+ | <br> | ||
+ | <br> | ||
+ | |||
+ | <u>Determine the DNA concentration and purity:</u> | ||
+ | <br> | ||
+ | <br> | ||
+ | |||
+ | <b>Table 1 shows the results of the linear pgRNA (2) from PCR (probably with anti-luxS gene).</b> | ||
+ | |||
+ | <br> | ||
+ | <br> | ||
+ | |||
+ | <b>Table 1:</b> The concentration and the relative purity of the pgRNA (2) from PCR. | ||
+ | |||
+ | <table style="width:65%"> | ||
+ | <tr> | ||
+ | <th>Concentration [ng/μL]</th> | ||
+ | <th>260 nm/280 nm</th> | ||
+ | <th>260 nm/230 nm</th> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>52.8</td> | ||
+ | <td>1.90</td> | ||
+ | <td>0.27</td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | <br> | ||
+ | |||
+ | |||
+ | From the 260/230 ratio, the sample has a relatively a small amount of nucleic acids. Probably, it is contaminated by the agarose from the gel electrophoresis. On the other hand, the 260/280 ratio is ok, indicating that the sample contains a relatively larger amount of RNA than DNA. | ||
+ | |||
+ | <u>InterLab – transformation of plasmids to competent cells:</u> | ||
+ | <br> | ||
+ | |||
+ | No visible colonies were detected on agar plates, except the positive and negative control cells. | ||
+ | |||
+ | |||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
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</div> | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
− | + | 3 | |
</div> | </div> | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Inoculation of successful transformed competent cells and InterLab study</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | |||
+ | <b>Goal:</b> | ||
+ | <br> | ||
+ | |||
+ | <ol> | ||
+ | <li>Inoculate colonies of successful transformed competent cells</li> | ||
+ | |||
+ | <li>InterLab study - transformation of plasmids to competent cells</li> | ||
+ | </ol> | ||
+ | <br> | ||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | |||
+ | <u>InterLab – transformation of plasmids to competent cells:</u> | ||
+ | <br> | ||
+ | |||
+ | No visible cell colonies were formed on the agar plates that were incubated on day 9 - 02. Junly. 2018. Only the positive and negative control cells formed colonies. | ||
+ | <br> | ||
+ | <br> | ||
+ | Therefore, the remaining plasmids (6 μL) were transformed to the competent cells and plated on agar based on the same protocol from day 2. Jul. 2018. During the incubation at 37℃ with shaker, the incubation time was extended to 2 h. The cell cultures were centrifuged, and 700 μL supernatant was discarded, and the pellets were resuspended with the remaining supernatant. The cell cultures were then plated on agar plated with CM, and incubated overnight at 37℃. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Inoculation of successful transformed competent cells:</u> | ||
+ | <br> | ||
+ | Colonies of successful transformed competent cells with pgRNA (probably containing anti-luxS) were inoculated from the agar plates (from day 9 – 02. July. 2018) to LB-medium with AMP. The cell cultures were incubated with shaker overnight at 37℃. | ||
+ | <br> | ||
+ | <br> | ||
+ | |||
+ | <b>Results:</b> | ||
+ | <br></span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 375: | Line 605: | ||
</div> | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
− | + | 4 | |
</div> | </div> | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Verification of successful inserted anti-luxS in pgRNA</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <b>Goal:</b> | ||
+ | <br> | ||
+ | <ol> | ||
+ | <li>InterLab - transformation of plasmids into competent cells</li> | ||
+ | |||
+ | <li>Verification of succsesful insertion of anti-luxS in pgRNA(2)</li> | ||
+ | </ol> | ||
+ | <br> | ||
+ | |||
+ | |||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | <u>InterLab – Transformation of plasmids to competent cells</u> | ||
+ | <br> | ||
+ | There has been a mistake of numbering the plates with plasmids provided by iGEM HQ. Therefore, we did not get any cell colonies from the previous two transformations… | ||
+ | <br> | ||
+ | <br> | ||
+ | The plasmids (1.5 μL) from the right wells were transformed to competent cells by following the transformation protocol from day – 02. July. 2018, after resuspension of the plasmids in the wells. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Cell density:</u> | ||
+ | <br> | ||
+ | The cell cultures with pgRNA(2) (probably with anti-luxS), inoculated from day 10 – 04. July. 2018, were diluted 10 times by following the same dilution procedure from day 6 – 27. June. 2018. The cells were incubated with shaker for 1h before measuring at OD 600. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Plasmid isolation:</u> | ||
+ | <br> | ||
+ | The plasmids from the two cell cultures were isolated after the same mini-prep protocol from day 3 – 22. June. 2018. The concentration and the purity of the isolated plasmids were measured by Nanodrop. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Restriction digest and gel elecrophoresis:</u> | ||
+ | <br> | ||
+ | Insertion of anti-luxS gene was verified after the protocol of restriction digest and gel electrophoresis (see the protocols from day 3 – 22. June. 2018). The restriction enzyme PstI was chosen, and the expected length of the plasmid fragments are 490 bp and 2094 bp. | ||
+ | <br> | ||
+ | <br> | ||
+ | Note! PstI has a cut site at the anti-luxS gene in the plasmid. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Bacteria glycerol stock:</u> | ||
+ | <br> | ||
+ | Two samples of the diluted cell cultures (made at this morning), were stored in 50% glycerol solution at -80℃ (the same green box with the other successful transformed cells with pgRNA (without anti-luxS) or cells with pdCas9 plasmids). | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Results:</b> | ||
+ | <br> | ||
+ | <u>InterLab - Transformation:</u> | ||
+ | <br> | ||
+ | Colonies were formed on agar plates with CM. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Cell density:</u> | ||
+ | <br> | ||
+ | <br> | ||
+ | Table 1: Absorbance of the cell cultures with pgRNA(2) after 1 h incubation at 37℃ with shaker. | ||
+ | |||
+ | <table style="width:35%"> | ||
+ | <tr> | ||
+ | <th>Culture</th> | ||
+ | <th>OD 600</th> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>pR2 (1)</td> | ||
+ | <td>0.954</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>pR2 (2)</td> | ||
+ | <td>0.998</td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | <u>Plasmid isolation:</u> | ||
+ | |||
+ | Table 2: Concentration and the relative purity of isolated pgRNA(2) from the two cell cultures. | ||
+ | |||
+ | <table style="width:50%"> | ||
+ | <tr> | ||
+ | <th></th> | ||
+ | <th>Concentration (ng/μL)</th> | ||
+ | <th>260 nm/280 nm</th> | ||
+ | <th>260 nm/230 nm</th> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>pR2(1)</td> | ||
+ | <td>37.2</td> | ||
+ | <td>2.06</td> | ||
+ | <td>4.29</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>pR2(2)</td> | ||
+ | <td>123.3</td> | ||
+ | <td>1.77</td> | ||
+ | <td>1.01</td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | |||
+ | |||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 390: | Line 720: | ||
</div> | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
− | + | 5 | |
</div> | </div> | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Double transformation and InterLab study - Inoculation</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | |||
+ | <b>Goal:</b> | ||
+ | <br> | ||
+ | <ol> | ||
+ | <li>Transform both pdCas9 and pgRNA with anti-luxS into competent cells</li> | ||
+ | |||
+ | <li>InterLab study - inoculate colonies in LB-medium</li> | ||
+ | </ol> | ||
+ | <br> | ||
+ | |||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | <u>Double transformation of pdCas9 and pgRNA with anti-luxS:</u> | ||
+ | <br> | ||
+ | |||
+ | Both pdCas9(2) and pgRNA(2) with anti-luxS (isolated from day 11 – 05. July. 2018) were simultaneously transformed into competent cells (DH5α). The amount of added pdCas9(2) (5 μL) and pgRNA(2) with anti-luxS was 5 µL per/plasmid, and it was added to the same tube containing competent cells. The cells were plated on agar with both AMP and CM. A couple of steps were added at the end, and the purpose was to increase the cell concentration plated on agar, and probably increase the possibility of colony formation. The cell culture was therefore centrifuged for 3 minutes at 6800g, and the supernatant discarded. The pellet was then resuspended and cells were plated. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>InterLab – Inoculation of colonies</u> | ||
+ | <br> | ||
+ | A colony from each agar plate was inoculated in LB-medium (5 mL) with CM (5 μL). The cell cultures were incubated overnight at 37℃ with shaker. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Results:</b> | ||
+ | <br> | ||
+ | |||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 405: | Line 762: | ||
</div> | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
− | + | 6 | |
</div> | </div> | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Inoculation of successful double transformed cells, interLab study - Cell measurement</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | |||
+ | <b>Goal:</b> | ||
+ | <br> | ||
+ | <ol> | ||
+ | <li>Inoculate successful double transformed cells (probably carrying pdCas9 and pgRNA with anti-luxS)</li> | ||
+ | |||
+ | <li>InterLab study - measure absorbance and the fluorescence of each cell cultures</li> | ||
+ | </ol> | ||
+ | <br> | ||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | <u>Inoculation of successful double transformed cells</u> | ||
+ | <br> | ||
+ | <ol> | ||
+ | <li>A colony from each agar plates with AMP and CM (made from day 13 – 05. July 2018) was picked and inoculated in LB medium (20 mL) with AMP (25 μL) and CM (25 μL). </li> | ||
+ | |||
+ | <li>The cell cultures were incubated at 37℃ with shaker.</li> | ||
+ | </ol> | ||
+ | |||
+ | <br> | ||
+ | |||
+ | <u>InterLab – Cell measurement</u> | ||
+ | <br> | ||
+ | |||
+ | We were not able to measure the cell cultures today, since the TECAN device was under reparation. | ||
+ | <br> | ||
+ | Each cell cultures were stored with 50% glycerol (see day 7 – 28. June. 2018) at -80℃. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Results:</b> | ||
+ | <br> | ||
+ | </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Jul | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 7 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Verification of pdCas9 and pgRNA with anti-luxS after double tranformation</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p style="font-size:110%"><b>Goal:</b> </p> | ||
+ | |||
+ | Verify that both pdCas9 and pgRNA with anti-luxS are tranformed into DH5α cells | ||
+ | <br> | ||
+ | <br> | ||
+ | <p style="font-size:110%"><b>Procedure:</b> </p> | ||
+ | |||
+ | |||
+ | <u>Dilution of cell culture:</u> | ||
+ | <br> | ||
+ | |||
+ | Each cell cultures, inoculated and incubated from day 13 – 07. July. 2018, were diluted (1mL) with LB medium with antibiotics until the OD 600 reached 1.9. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Plasmid verification:</b> | ||
+ | <br> | ||
+ | |||
+ | <u>Plasmid isolation:</u> | ||
+ | <br> | ||
+ | The plasmids were isolated from each cell cultures after following the mini-prep plasmid protocol from day 3 – 22. June. 2018. The concentration and the purity of the samples were determined by Nanodrop. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Restriction digest and gel electrophoresis:</u> | ||
+ | <br> | ||
+ | |||
+ | The plasmids in each sample were digested with restriction enzymes BamHI-HF and PstI with the following ingredients and amounts: | ||
+ | <br> | ||
+ | <ul> | ||
+ | <li>7.1 μL Plasmids</li> | ||
+ | |||
+ | <li>0.5 μL PstI</li> | ||
+ | |||
+ | <li>0.5 μL BamHI-HF</li> | ||
+ | |||
+ | <li>2 μL NEBuffer 1.1</li> | ||
+ | |||
+ | <li>10.4 μL ddH2O</li> | ||
+ | </ul> | ||
+ | |||
+ | The samples were incubated for 1.5 h at 37℃. | ||
+ | <br> | ||
+ | |||
+ | Note! NEBbuffer 1.1 was chosen instead of Cut smart since the activity of PstI in Cut smart was 50%. | ||
+ | <br> | ||
+ | The activity of the enzymes in NEBbuffer 1.1: | ||
+ | <br> | ||
+ | BamHI-HF: 100% | ||
+ | <br> | ||
+ | PstI:75% | ||
+ | <br> | ||
+ | After the plasmids have been degraded by restriction enzymes, the fragments were separated by gel electrophoresis. | ||
+ | <br> | ||
+ | <br> | ||
+ | <p style="font-size:110%"><b>Results:</b> </p> | ||
+ | |||
+ | <b><u>Plasmid verification:</u></b> | ||
+ | <br> | ||
+ | |||
+ | <u>Plasmid isolation:</u> | ||
+ | <br> | ||
+ | |||
+ | <table style="width:80%"> | ||
+ | <tr> | ||
+ | <th>Sample</th> | ||
+ | <th>Concentration [ng/μL]</th> | ||
+ | <th>260 nm/280 nm</th> | ||
+ | <th>260 nm/230 nm</th> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>1</td> | ||
+ | <td>219.9</td> | ||
+ | <td>2.01</td> | ||
+ | <td>1.82</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>2</td> | ||
+ | <td>35.3</td> | ||
+ | <td>2.03</td> | ||
+ | <td>3.86</td> | ||
+ | </tr> | ||
+ | </table | ||
+ | |||
+ | <br> | ||
+ | |||
+ | <u>Restriction digest and gel electrophoresis:</u> | ||
+ | <br> | ||
+ | |||
+ | The bands on the gel, corresponded with the expected fragments (6705bp, 2094bp, 465bp, 25bp) from digestion of the plasmids by PstI and BamHI-HF. Therefore, we concluded that both of pdCas9 and pgRNA with anti-luxS have successfully been transformed into DH5α cells. | ||
+ | |||
+ | </span></div> | ||
</li> | </li> | ||
Line 433: | Line 927: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p style="font-size:120%;">Week 28</p></div> |
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
Line 450: | Line 944: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>No lab</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span></span></div> |
</li> | </li> | ||
<li> | <li> | ||
Line 465: | Line 959: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>No lab</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span></span></div> |
</li> | </li> | ||
<li> | <li> | ||
Line 480: | Line 974: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>No lab</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span></span></div> |
</li> | </li> | ||
<li> | <li> | ||
Line 495: | Line 989: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>InterLab Study: Revive bacteria glycerol stock</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
− | + | <p style="font-size:110%"><b> Goal </b>: InterLab Study: Revive bacteria glycerol stock</p> | |
− | + | ||
− | + | ||
+ | <b>Procedure:</b> | ||
+ | |||
+ | |||
+ | The frozen bacteria glycerol stock made from 6th of July were thawed on ice. Each culture were inoculated in LB medium with CM (5 mL), and incubated over night at 37°C.</span></div> | ||
+ | </li> | ||
+ | |||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
<div class="date-display"> | <div class="date-display"> | ||
<div class="date-display-cal"> | <div class="date-display-cal"> | ||
Line 510: | Line 1,012: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>InterLab Study: CFU/mL/OD calculations</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <b>Goal:</b> | ||
+ | <br> | ||
+ | Count colony forming units on plates spread the day before. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | Counted CFU on all 36 plates incubated 13. July. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Results:</b> | ||
+ | <br> | ||
+ | The colonies on agar plates, from yesterday’s incubation, were counted and registered: | ||
+ | |||
+ | <table style="width:65%"> | ||
+ | <tr> | ||
+ | <th>CFU</th> | ||
+ | <th>Dilution 3</th> | ||
+ | <th>Dilution 4</th> | ||
+ | <th>Dilution 5</th> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>1.1</td> | ||
+ | <td>195</td> | ||
+ | <td>6</td> | ||
+ | <td>1</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>1.2</td> | ||
+ | <td>185</td> | ||
+ | <td>2</td> | ||
+ | <td>0</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>1.3</th> | ||
+ | <td>203</td> | ||
+ | <td>15</td> | ||
+ | <td>3</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>2.1</td> | ||
+ | <td>222</td> | ||
+ | <td>19</td> | ||
+ | <td>2</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>2.2</td> | ||
+ | <td>38</td> | ||
+ | <td>22</td> | ||
+ | <td>1</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>2.4?</td> | ||
+ | <td>52</td> | ||
+ | <td>15</td> | ||
+ | <td>1</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>3.1</td> | ||
+ | <td>113</td> | ||
+ | <td>56</td> | ||
+ | <td>3</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>3.2</td> | ||
+ | <td>112</td> | ||
+ | <td>12</td> | ||
+ | <td>2</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>3.3</td> | ||
+ | <td>127</td> | ||
+ | <td>25</td> | ||
+ | <td>2</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>4.1</td> | ||
+ | <td>79</td> | ||
+ | <td>4</td> | ||
+ | <td>0</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>4.2</td> | ||
+ | <td>75</td> | ||
+ | <td>10</td> | ||
+ | <td>1</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>4.3</td> | ||
+ | <td>107</td> | ||
+ | <td>3</td> | ||
+ | <td>1</td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | |||
+ | where 1 and 2 are positive controls, 3 and 4 are negative controls. (= 2.1 means the second dilution of the second positive control culture) | ||
+ | |||
+ | </span></div> | ||
+ | |||
+ | </li> | ||
+ | |||
+ | <!----Lagt til-----> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Jul | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 14 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>InterLab – CFU/mL/OD calculation</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | |||
+ | <b>Goal:</b> | ||
+ | <br> | ||
+ | Counting colonies on each agar plate, and calculate CFU/mL in starting samples with an OD<sub>600</sub> = 0.1. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | The colonies on the agar plates, prepared from yesterday’s incubation, were counted and registered. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Results:</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Table 1:</b> The average values of counted colonies from two cultures of positive and negative controls with different final dilution factor (dilution 1 = 8x104, dilution 2 = 8x105, dilution 3 = 8x106). | ||
+ | <table style="width:65%"> | ||
+ | <tr> | ||
+ | <th></th> | ||
+ | <th>Positive control</th> | ||
+ | <th>Negative control</th> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>Culture 1, dilution 1</td> | ||
+ | <td>194.3</td> | ||
+ | <td>117.3</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>Culture 1, dilution 2</td> | ||
+ | <td>7.7</td> | ||
+ | <td>31.0</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>Culture 1, dilution 3</td> | ||
+ | <td>1.3</td> | ||
+ | <td>2.3</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>Culture 2, dilution 1</td> | ||
+ | <td>104.0</td> | ||
+ | <td>87.0</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>Culture 2, dilution 2</td> | ||
+ | <td>18.7</td> | ||
+ | <td>5.7</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>Culture 2, dilution 3 </td> | ||
+ | <td>1.3</td> | ||
+ | <td>0.7</td> | ||
+ | </tr> | ||
+ | </table> | ||
+ | |||
+ | </span></div> | ||
</li> | </li> | ||
+ | <!----Lagt til----> | ||
</ul> | </ul> | ||
Line 536: | Line 1,209: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p style="font-size:120%;">Week 29</p></div> |
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
Line 553: | Line 1,226: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Transformation of the RFP-biobrick (test)</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | |||
+ | <b> Goal: </b> | ||
+ | <br> | ||
+ | Transform the RFP-biobrick (BBa_J04450) into competent DH5α-cells. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b> Procedure :</b> | ||
+ | <br> | ||
+ | Before doing the transformation the biobrick was resuspended with 10 µL dH<sub>2</sub>O in the plate (position 23O, plate 7). The cells with and without the biobrick (negative control) were both incubated and plated after the transformation. The negative control was plated on LA-petri dishes while the transformed cells was plated on LA-petri dishes with CM. | ||
+ | <br> | ||
+ | <b> Results: </b> | ||
+ | <br> | ||
+ | There was only one colony on each plate | ||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 568: | Line 1,255: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Colony picking biobrick (test) and transformation</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <b>Goal : </b> | ||
+ | <br> | ||
+ | 1. Get colonies of the transformed DH5α (biobrick) | ||
+ | |||
+ | 2. Get colonies on the negative control plate | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure: </b> | ||
+ | <br> | ||
+ | 1. Due to the lack of colonies on the negative control plates, new plates was streaked. | ||
+ | <br> | ||
+ | 2. New LA-plates without antibiotics were made. | ||
+ | <br> | ||
+ | 3. Colonypicking the two colonies from the plates with the transformed bacteria in to liquid medium. | ||
+ | <br> | ||
+ | 4. The transformation of bacteria with the biobrick plasmid was redone on four plates because of the lack of growth on the plates (see 16.07.18). | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Results: </b> | ||
+ | <br> | ||
+ | There were more colonies on the four new plates, and they were light red as well (About 20 colonies). | ||
+ | The new negative control plates had colonies as well. | ||
+ | <br> | ||
+ | <br> | ||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 583: | Line 1,295: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>RFP biobrick fluorescens measurement (test)</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <b>Goal:</b> | ||
+ | <br> | ||
+ | 1. To get a descriptive curve for the rise in fluorescens (transformed DH5α) | ||
+ | <br> | ||
+ | 2. Find out how often the measurements need to be done. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure: </b> | ||
+ | <br> | ||
+ | The second batch of plates from transformation and the negative control: | ||
+ | <br> | ||
+ | 1. Colonypicking and exchange to liquid medium | ||
+ | <br> | ||
+ | <br> | ||
+ | |||
+ | <u>Measurements of the first batch (Tecan):</u> | ||
+ | <br> | ||
+ | 1. Measured the OD of the blank (LB and CM), and measured the OD of the two cultures. | ||
+ | <br> | ||
+ | 2. For the next measurements we diluted the cultures by 1:100 in separate tubes. | ||
+ | <br> | ||
+ | 3. Incubation of the tubes | ||
+ | <br> | ||
+ | 4. The first measurement was done in the Tecan, and repeated for every 30 minutes and then 1 hour (because of minor changes in values) | ||
+ | <br> | ||
+ | 5. The measurements was set overnight as well using the following script: FluorescenceLong. The data was set to 588 nm absorbance, 584 nm excitation, 607 nm emission, 37°C, 40 gain, 150 kinetic cycles, 300s shaking (orbital 3 mm amplitude). | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Results: </b> | ||
+ | <br> | ||
+ | The second batch from transformation has turned red. From the measurements of the test batch we have an idea of the increase in fluorescence intensity and the change in absorbance over time. This can be used to determine the timing of the second batch with the negative control as well. | ||
+ | <br> | ||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 598: | Line 1,343: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Biobrick: Preparations, Fluoresence microscopy</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <b>Goal:</b> | ||
+ | <br> | ||
+ | Prepare for measurements tomorrow. | ||
+ | <br> | ||
+ | Learn about fluorescence microscopy | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | <u>Preparations:</u> | ||
+ | <br> | ||
+ | Made LA-petri dishes with CM. | ||
+ | Diluted cultures of the biobrick Bba_J04450 and negative control and incubated them at 37°C overnight. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Demonstration and training in fluorescence microscopy:</u> | ||
+ | <br> | ||
+ | Astrid Bjørkøy showed us how to use the fluorescence microscope, and we tried it out by taking photos of cultures of the Bba_J04450 biobrick. She also told us how to count cells by adjusting a photo's threshold and calculate based on image size. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Results:</b> | ||
+ | <br> | ||
+ | The biobrick Bba_J004450 was very bright. We used excitation 561 nm and emission ca 625-680 nm as the biobrick was too bright at emission 607 nm. Consider using another laser further away from excitation point (584 nm) for the real photos of the biobrick, and the improved biobrick. | ||
+ | <br> | ||
+ | |||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 613: | Line 1,384: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Biobrick: Red Fluorescent Protein measurement (FAILED)</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <b>Goal:</b> | ||
+ | <br> | ||
+ | Measure the expression of the Bba_J04450 biobrick in transformed dH5α cells. This is done by measuring fluorescence. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | 1. Incubated dH5α, J04450 transformed cells were dilluted 1:100 with LB | ||
+ | <br> | ||
+ | 2. 200 µL, 5 replicates of LB, LB with Chloramphenicol and 5 dH5α dillutions made from different batches were applied to a 96 well plate | ||
+ | <br> | ||
+ | 3. Tecan plate reader was used to measure absorbance at 588 nm and fluorescence at excitation 584 nm and emission 607 nm with the following parameters: | ||
+ | <br> | ||
+ | <ul> | ||
+ | <li>Temperature: 37,0°C, varying from 36,5°C to 37,5°C</li> | ||
+ | <li>Kinetic cycles: 750</li> | ||
+ | <li>Gain: 40</li> | ||
+ | <li>Z position: 18055 µM</li> | ||
+ | <li>Shaking: 300 s</li> | ||
+ | <li>Orbital shaking amplitude: 3 mm</li> | ||
+ | </ul> | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Results:</b> | ||
+ | <br> | ||
+ | The wells dried out, presumably due to us choosing not to use a lid on the plate, and the measurements were therefore aborted by the machine. | ||
+ | <br> | ||
+ | |||
+ | </span></div> | ||
</li> | </li> | ||
Line 636: | Line 1,436: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p style="font-size:120%;">Week 30</p></div> |
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
Line 653: | Line 1,453: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Make super competent cells of the TG1</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <b>Goal:</b> | ||
+ | <br> | ||
+ | Make supercompetent cells of the E.coli - TG1 strain | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>DAY 1:</u> | ||
+ | <br> | ||
+ | <br> | ||
+ | - Made Psi media, transformation buffer 1 and transformation buffer 2. | ||
+ | <br> | ||
+ | - Made an E.coli TG1 culture in a small flask with 10 mL Psi- medium. Inoculated culture at the end of the day and left the flask for incubating while shaking and at 37°C overnight. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Results:</b> | ||
+ | <br> | ||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 668: | Line 1,487: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Make supercompetent cells of the TG1, day 2</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <u>DAY 2:</u> | ||
+ | <br> | ||
+ | This was done from an overnight culture of TG1-cells, see protocol. | ||
+ | <b>Results:</b> | ||
+ | <br> | ||
+ | There was no growth on the plates with CM and AMP after the transformation (25. July. 2018), so the conclusion was that the cells were not supercompetent. The protocol was then updated and optimized for another trial. | ||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 683: | Line 1,509: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Miniprep and transformation of TG1-cells</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <b>Goal: </b> | ||
+ | <br> | ||
+ | 1. Transformation of TG1-cells with DNA that includes pdCas9 and pgRNA with antiluxS-gene. | ||
+ | <br> | ||
+ | 2. Make LA-plates with both CM and AMP antibiotics | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | |||
+ | pgRNA with antiluxS and pdCas9 has already been transformed into E.coli DH5α. The plasmids were isolated and extracted by the miniprep protocol. Transformation of the TG1-cells with the extracted plasmids was done, and the bacteria were incubated. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Results:</b> No bacterial growth has been observed. | ||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 691: | Line 1,532: | ||
<div class="date-display-cal"> | <div class="date-display-cal"> | ||
<div class="date-display-month"> | <div class="date-display-month"> | ||
− | + | Jul | |
</div> | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
Line 698: | Line 1,539: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Preparations for biofilm measurements</p></div> |
− | + | <div class="collapsible-body"><span> | |
+ | <b>Goal: </b> | ||
+ | <br> | ||
+ | 1. Make media for the biofilm measurements (LB and M63B1) | ||
+ | <br> | ||
+ | 2. Prepare TG1, TG2 buffers and Psi medium for supercompetent cells. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | 1. Made three versions of the two media with pH-values at 4.5, 7.2 and 9.5. The media was then autoclaved and sugar will be added before use of the media. | ||
+ | <br> | ||
+ | 2. Made TG1, TG2 buffers and Psi medium. | ||
+ | <br> | ||
+ | <br> | ||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 713: | Line 1,569: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Make supercompetent cells of TG1, second attempt</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
− | + | <b>Goal: </b> | |
+ | <br> | ||
+ | 1. Make supercompetent cells of TG1 by following an improved protocol. | ||
+ | <br> | ||
− | + | </ul> | |
<!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | <!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | ||
Line 736: | Line 1,595: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p style="font-size:120%;">Week 31</p></div> |
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
Line 753: | Line 1,612: | ||
</div> | </div> | ||
</div> | </div> | ||
− | + | <p>Transformation of TG1-cells and flow cytometry test</p></div> | |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <b>Goal: </b> | ||
+ | <br> | ||
+ | 1. Transformation of TG1-cells with DNA that includes pdCas9 and pgRNA with antiluxS-gene. | ||
+ | 2. Learn and conduct a flow cytometry test of the E.Coli DH5a that contains the Bba_J04450-biobrick and a negative control. The goal was also to optimize a protocol for the biobrick measurements. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | |||
+ | pgRNA with antiluxS and pdCas9 has already been transformed into E.coli DH5α. The plasmids were isolated and extracted by the miniprep protocol, and the cells transformed and incubated. For the transformation, 5 µL of the miniprepped plasmids were used instead of 2 µL. | ||
+ | <br> | ||
+ | <br> | ||
+ | 2. | ||
+ | <br> | ||
+ | <b>Results:</b> Noticeable bacterial growth was observed on all plates, with no apparent contamination. | ||
+ | </span></div> | ||
</li> | </li> | ||
+ | |||
<li> | <li> | ||
<div class="collapsible-header"> | <div class="collapsible-header"> | ||
Line 768: | Line 1,644: | ||
</div> | </div> | ||
</div> | </div> | ||
− | + | <p>TG1 colonypicking</p></div> | |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
− | + | <br> | |
+ | <b>Goal: </b> | ||
+ | <br> | ||
+ | 1. Make cultures out of plates made on the 30th of July, prepare for test digest. | ||
+ | <br> | ||
+ | 2. Make DH5α cultures for later use in biobrick measurements. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | Colonypicking into five beakers with 25 mL LB, 25uL Amp and 25 µL CM. Incubation at 37°C, 225 RPM overnight. New LB-media was made. | ||
+ | |||
+ | </span></div> | ||
+ | |||
+ | </li> | ||
<li> | <li> | ||
<div class="collapsible-header"> | <div class="collapsible-header"> | ||
Line 776: | Line 1,666: | ||
<div class="date-display-cal"> | <div class="date-display-cal"> | ||
<div class="date-display-month"> | <div class="date-display-month"> | ||
− | + | Aug | |
</div> | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
Line 783: | Line 1,673: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Miniprep, Nanodrop, Test digest</p></div> |
− | + | <div class="collapsible-body"><span> | |
− | + | </span></div> | |
<li> | <li> | ||
<div class="collapsible-header"> | <div class="collapsible-header"> | ||
Line 791: | Line 1,681: | ||
<div class="date-display-cal"> | <div class="date-display-cal"> | ||
<div class="date-display-month"> | <div class="date-display-month"> | ||
− | + | Aug | |
</div> | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
Line 798: | Line 1,688: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Verification of transformation of TG1 and preparation of media for biofilm measurements</p></div> |
− | + | <div class="collapsible-body"><span> | |
+ | <b>Goal: </b> | ||
+ | <br> | ||
+ | 1. Confirm successful transformation of TG1 with pgRNA and PdCas9 with anti-luxS. | ||
+ | <br> | ||
+ | 2. Prepare media for biofilm measurements | ||
+ | <br> | ||
+ | 3. Inoculate TG1 in newly made media | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure: </b> | ||
+ | <br> | ||
+ | Verification of the plasmids was done by miniprep, nanodrop, test digest and gel electrophoresis. Different amounts of glucose was added to the respective media. | ||
+ | <br> | ||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 806: | Line 1,710: | ||
<div class="date-display-cal"> | <div class="date-display-cal"> | ||
<div class="date-display-month"> | <div class="date-display-month"> | ||
− | + | Aug | |
</div> | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
Line 813: | Line 1,717: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Measure OD + change medium</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
− | + | <b>Goal: </b> | |
+ | <br> | ||
+ | <br> | ||
</ul> | </ul> | ||
− | + | <!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | |
</li> | </li> | ||
<!------------------------------------------- END OF WEEK ---------------------------------------------> | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
− | + | ||
+ | <!------------------------------------------- WEEK ---------------------------------------------------> | ||
<li> | <li> | ||
<div class="collapsible-header"> | <div class="collapsible-header"> | ||
Line 836: | Line 1,743: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p style="font-size:120%;">Week 32</p></div> |
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
Line 846: | Line 1,753: | ||
<div class="date-display-cal"> | <div class="date-display-cal"> | ||
<div class="date-display-month"> | <div class="date-display-month"> | ||
− | + | Aug | |
</div> | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
Line 853: | Line 1,760: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p> E.Coli TG1 biofilm measurement</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span>The two E.Coli TG1 96-well plates made yesterday (06.08.2018) underwent the Crystal Violet Assay protocol (see Protocols), and the biofilm produced was measured by measuring absorbance at 590 nm with Tecan Infinite 200 Pro plate reader.</span></div> |
</li> | </li> | ||
− | + | ||
+ | <li> | ||
<div class="collapsible-header"> | <div class="collapsible-header"> | ||
<div class="date-display"> | <div class="date-display"> | ||
Line 868: | Line 1,776: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Incubate DH5α and TG1 in chosen media for biofilm measurements.</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <b> Goal: </b> | ||
+ | <br> | ||
+ | <br> | ||
+ | - Incubate DH5α and TG1 (with pgRNA and pdCas) in selected media (LB and M63B1, pH 7.2, 0.4%/0.8% Glucose) | ||
+ | |||
+ | - Make Tetracycline stock solution (5.0 mg/ml) | ||
+ | <br> | ||
+ | <br> | ||
+ | <b> Procedure: </b> | ||
+ | <br> | ||
+ | <br> | ||
+ | Incubated the frozen DH5α-stocks in LB (with CM and AMP) for a few hours. Inoculated into the chosen media in eppendorf tubes. Incubated TG1 into the chosen media in eppendorf tubes overnight. | ||
+ | |||
+ | Made 5mg/mL Tetracyclin-solution (inducer). Note: light sensitive. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Protocol:</u> | ||
+ | <br> | ||
+ | - Tetracyclin-HCl(powder): 54 mg | ||
+ | <br> | ||
+ | - Ethanol: 7 mL | ||
+ | <br> | ||
+ | - dH2O: 3 mL | ||
+ | <br> | ||
+ | After being incubated for some time tetracyclin solution was added to the eppendorf tubes do induce the transcription of Cas9, and the culture tubes were further incubated. | ||
+ | |||
+ | |||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 883: | Line 1,819: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Incubation of cell cultures for biofilm assay and preparation of M63B1 medium</p></div> |
− | <div class="collapsible-body"><span> | + | |
+ | <div class="collapsible-body"><span> | ||
+ | <b>Goal :</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | 1. Incubate cell cultures on 96-well plates for biofilm assay | ||
+ | <br> | ||
+ | 2. Make M63B1 medium | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure :</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Preparation for biofilm assay:</u> | ||
+ | <br> | ||
+ | 1. Overnight cultures (with TET) was diluted until OD600 = 0.1 | ||
+ | <br> | ||
+ | 2. Each diluted culture (100μL) was added on 96-well plate and incubated for 4 h at 37℃ | ||
+ | <br> | ||
+ | 3. After 4 h incubation, the non-adhered cells were removed by washing the wells with physiological saline and the supernatant was discarded. | ||
+ | <br> | ||
+ | 4. New medium (100 μL) was added to each well and the plate was incubated for 24 h at 37℃. | ||
+ | <br> | ||
+ | Note! The media that were added to the wells right before 24 h incubation did not contain TET | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>M63B1 medium:</u> | ||
+ | <br> | ||
+ | M63B1 medium was made after following the protocol from 26. July. 2018 | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Results:</b> | ||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 898: | Line 1,866: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Preparation of media with TET, and incubation of cell cultures on 96-well plate for biofilm assay |
− | <div class="collapsible-body"><span> | + | </p></div> |
+ | <div class="collapsible-body"><span> | ||
+ | <b>Goal :</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | 1. Preparation of media with tetracycline (2 μM) | ||
+ | <br> | ||
+ | 2. Incubate cell cultures with and without tetracycline (TET) on a 96-well plate for the 24 h biofilm assay. | ||
+ | <br> | ||
+ | 3. Measure the absorbance of CV- assay with and without TET, made from yesterdays’ incubation. | ||
+ | <br> | ||
+ | 4. Prepare TG1 and dH5α cell cultures in growth medium (LB or M631B) with or without TET (2 μM). | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure :</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Preparation of media with TET (2 μM):</u> | ||
+ | <br> | ||
+ | 1. Tetracycline (TET) (50 μL, 0.5 mg/mL) was added to a 25mL LB medium with 0.4% glucose, AMP and CM. The same amount of tetracycline was added to LB medium with 0.8% glucose, AMP and CM | ||
+ | <br> | ||
+ | 2. For the final M63B1 medium (0.5 L) with MgSO4*7H2O, AMP and CM and 0.4% or 0.8% glucose, TET (1mL, 0.5 mg/mL) was added. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Preparation of 96-wells plate for 24h biofilm assay:</u> | ||
+ | <br> | ||
+ | 1. Overnight cultures were diluted with or without TET (2 μM) containing media (LB or M63B1) until a target OD600 = 0.1. | ||
+ | <br> | ||
+ | 2. Each diluted culture (100 μL) were incubated on a 96-wells plate for 20 h at 37℃. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Absorbance measurement of CV-assay:</u> | ||
+ | <br> | ||
+ | 1. The supernatant was discarded from a 24h incubation of cell cultures on a 96-wells plate (prepared from 08. August. 2018) and rinsed with PS (100μL). | ||
+ | <br> | ||
+ | 2. The biofilm was fixed by adding methanol (100 μL, 99%) and waited for 15min. The supernatant was discarded, and the plate was airdried. | ||
+ | <br> | ||
+ | 3. CV-solution (100 μL, 0.1%) was added to each well and coloured the biofilm for 20 min. The excess CV was washed away with dH<sub>2</sub>O | ||
+ | 4. Acetic acid (150 μL, 33%) was added to the each well. | ||
+ | <br> | ||
+ | 5. The absorbance was measured at Abs 590 nm | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Results:</b> | ||
+ | |||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 913: | Line 1,926: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Preparation of overnight cultures for biofilm assay, and storage of TG1 cells with pgRNA and pdCas9 |
− | <div class="collapsible-body"><span> | + | </p></div> |
+ | |||
+ | <div class="collapsible-body"><span> | ||
+ | |||
+ | <b>Goal :</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | 1. Prepare overnight cultures in LB (0.4% or 0.8% glucose, with AMP and CM) or M63B1 (0.4% or 0.8% glucose, with AMP and CM) with or without TET. | ||
+ | <br> | ||
+ | 2. Wash the 96-well plate (after 20 h adhesion - prepared from 09.08.2018) with physiological saline, add new media and incubate the plate. | ||
+ | <br> | ||
+ | 3. Make bacteria glycerol stocks of TG1 cells with pgRNA and pdCas9. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure :</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | |||
+ | <u>Preparation of overnight culture:</u> | ||
+ | <br> | ||
+ | <br> | ||
+ | TG1 and dH5α were incubated in eppendorf tubes with different media (LB or M63B1 with glucose (0.4% or 0.8%), AMP and CM) with or without TET (2 μM) for overnight at 37℃ with shaking. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Preparation for biofilm assay:</u> | ||
+ | <br> | ||
+ | <br> | ||
+ | 1. After 20 h adhesion (plate prepared from 09. August. 2018), the non-adhered cells were removed by washing the wells with physiological saline (PS) and the supernatant was discarded. | ||
+ | <br> | ||
+ | 2. New medium (100 μL) was added to each well and the plate was incubated for 24 h at 37℃. | ||
+ | <br> | ||
+ | <br> | ||
+ | <u>Bacteria glycerol stock preparation:</u> | ||
+ | <br> | ||
+ | <br> | ||
+ | TG1 cells with pgRNA and pdCas9 (500 μL) was stored with glycerol (500 μL, 50%) at -80℃. | ||
+ | <br> | ||
+ | <br> | ||
+ | Results : | ||
+ | </span></div> | ||
</li> | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Aug | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 11 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Preparation of overnight cultures for biofilm assay | ||
+ | |||
+ | </p></div> | ||
+ | |||
+ | <div class="collapsible-body"><span> | ||
+ | <b>Goal :</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | Prepare 96-well for cell adhesion and CV-assay | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure :</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | The OD of some of the overnight cultures was not optimal for continuing the procedure of CV assay. New cell cultures were made. | ||
+ | <br> | ||
+ | <br> | ||
+ | 96-well plates for 24 h, 48 h and 72 h incubation were made. However, since the cell cultures could not be diluted to OD = 0.1, the results of the CV assay will not be comparable. | ||
+ | |||
+ | </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Aug | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 12 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Incubation of cell cultures for biofilm assay | ||
+ | |||
+ | </p></div> | ||
+ | |||
+ | <div class="collapsible-body"><span> | ||
+ | <b>Goal :</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | Preparation for cell adhesion on 96-well plates for 24 h, 48 h and 72 h incubation. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Procedure :</b> | ||
+ | <br> | ||
+ | <br> | ||
+ | 1. The overnight cultures were resuspended, before dilution until a target OD = 0.1. | ||
+ | <br> | ||
+ | 2. The diluted cell cultures were resuspended and added on 96-well plates and incubated for 4 h at 37℃. | ||
+ | <br> | ||
+ | 3. After 4 h incubation, the wells were washed with physiological saline (100 μL) and the supernatant was discarded. | ||
+ | <br> | ||
+ | 4. New media (100 μL) were added to the plates, and the plates were incubated at 37℃. | ||
+ | <br> | ||
+ | <br> | ||
+ | <b>Results :</b> | ||
+ | </span></div> | ||
</ul> | </ul> | ||
Line 923: | Line 2,045: | ||
<!------------------------------------------- END OF WEEK ---------------------------------------------> | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
+ | |||
+ | |||
+ | |||
<!------------------------------------------- WEEK ---------------------------------------------------> | <!------------------------------------------- WEEK ---------------------------------------------------> | ||
<li> | <li> | ||
Line 936: | Line 2,061: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p style="font-size:120%;">Week 33</p></div> |
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
Line 953: | Line 2,078: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Biofilm measurements after 24hrs</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | |||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | Followed the crystal violet assay: | ||
+ | <br> | ||
+ | <br> | ||
+ | Changed medium in the plate for 48 and 72 hrs. | ||
+ | <br> | ||
+ | <br> | ||
+ | |||
+ | <b>Results:</b> | ||
+ | <br> | ||
+ | |||
+ | Results did not show any clear trend. Excel sheet attached. | ||
+ | <br> | ||
+ | |||
+ | Wells with only medium, not cells, showed too high absorbance measurements, probably because of contamination of the mediums. Decided to autoclave all the mediums again. Will take measurements at 48 hrs, but not at 72 hrs. | ||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 968: | Line 2,111: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Biofilm measurement after 48 hrs</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <b>Goal: </b> | ||
+ | </b> | ||
+ | <br> | ||
+ | <ol> | ||
+ | <li>Measure biofilm after 48 hrs.</li> | ||
+ | |||
+ | <li>Prepare RRVT-Biobrick and biobrick backbone</li> | ||
+ | |||
+ | <li>Ligate and transform RRvT- biobrick and biobrick backbone into DH5alpha cells.</li> | ||
+ | </ol> | ||
+ | |||
+ | |||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | |||
+ | 1. Performed the Crystal Violet Assay procedure for the plate designated for 48hrs and for the plate that initially was designated for 72 hrs measurement. | ||
+ | |||
+ | |||
+ | |||
+ | </span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 983: | Line 2,146: | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>Biobrick ligation and transformation</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span> |
+ | <b>Goal: </b> | ||
+ | </b> | ||
+ | <br> | ||
+ | <ol> | ||
+ | <li> Ligate plasmid backbone and RRvT-plasmid and transform into cells. </li> | ||
+ | <li> Due to the lack of colonies from yesterdays transformation the ligation of plasmid backbone and RRvT-plasmid and transformation into E.Coli Dh5α cells was redone. </li> | ||
+ | </ol> | ||
+ | <b>Procedure:</b> | ||
+ | <br> | ||
+ | <ol> | ||
+ | <ul>Preparations of plasmid backbone and RRvT-biobrick: | ||
+ | <br> | ||
+ | |||
+ | <p> Made enzyme master mix for plasmid backbone by adding 5μL NEB buffer 2, 0.5 μL EcoRI-HF, 0.5 μL PstI, 0.5 μL BSA and 18.5 μL dH<sub>2</sub>O to an Eppendorf tube. </p> | ||
+ | <p> Made enzyme master mix for RRvT-biobrick by adding 5μL NEB buffer 2, 0.5μL EcoRI-HF, 0.5 μL PstI and 19 μL dH<sub>2</sub>O to an Eppendorf tube. Incubated mix for 20 min at 50℃. <p> | ||
+ | <p> Digested Plasmid backbone by adding 4 μL linearized backbone (25 ng/μL for 100 ng) and 4 μL of enzyme master mix for plasmid backbone. </p> | ||
+ | <p> Digested RRvT-biobrick by adding 4 μL of the biobrick and 4 μL of the enzyme master mix for RRvT-biobrick. | ||
+ | Digested both reactions at 37℃ for 90 min and did heat kill at 80℃ for 20 min. </p> </ul> | ||
+ | <br> | ||
+ | <ul>Ligation: | ||
+ | <br> | ||
+ | <p> Added 2 μL of digested plasmid backbone. </p> | ||
+ | <p> Added 2 μL of digested RRvT-biobrick. </p> | ||
+ | <p> Added 1 μL T4 DNA ligase buffer. </p> | ||
+ | <p> Added 0.5 μL of T4 DNA ligase. </p> | ||
+ | <p> Added water to 10 μL. </p> | ||
+ | <p> Ligated at 16℃ for30min. Did heat kill at 80℃ for 20 min. </p> | ||
+ | <br> | ||
+ | <p> Transformed <i> E.Coli </i> Dh5α cells with 1-2 μL of product following the protocol for transformation. </p> | ||
+ | <p> Inoculated .. plates and let them incubate at 37℃ to the next day.</p><ul> | ||
+ | </ol> | ||
+ | <li> | ||
+ | <!--- Change ---> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Aug | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 16 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Preparation for biobrick (RRvT) measurement and biofilm assay </p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <b> Goal: </b> | ||
+ | </b> | ||
+ | <br> | ||
+ | <ol> | ||
+ | <li> Inoculate successful transformed cells into LB medium with CM. </li> | ||
+ | <li> Revive TG1 and DH5α cells in LB medium with AMP, CM and 0% glucose. </li> | ||
+ | </ol> | ||
+ | <b> Procedure: </b> | ||
+ | <p> Preparation for biobrick (RRvT) measurement: </p> | ||
+ | <p> Successful transformed cell colonies from yesterday's incubation were inoculated into LB - medium with CM and incubated at 37°C with shaking. </p> | ||
+ | <p> Preparation for cell cultures for biofilm assay: </p> | ||
+ | <p> TG1 and DH5α cells with pgRNA and pdCas9 were revived in LB medium with AMP, CM and 0% glucose. The cell cultures were incubated at 37°C with shaking. </p> | ||
+ | |||
+ | <!--- Change ---> | ||
+ | </span></div> | ||
+ | |||
+ | </li> | ||
+ | <li> | ||
+ | <!--- Change ---> | ||
+ | |||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Aug | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 17 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Preparation for biofilm assay</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | |||
+ | <b> Goal: </b> | ||
+ | <br> | ||
+ | <ul> | ||
+ | <li> Dilute the overnight cultures for biofilm assay. </li> | ||
+ | <li> Do Crystal Violet assay after 3 h, 5 h and 8 h of incubation of a 96-well plate. </li> | ||
+ | </ul> | ||
+ | <br> | ||
+ | <b> Procedure: </b> | ||
+ | <p> The media for biofilm assay were made by adding the following ingredients: </p> | ||
+ | <ul> | ||
+ | <li> LB 0.4% glucose, TET: 10 mL LB, 10µL AMP, 10µL CM, 0.2 mL 20% Glucose, 19.7µL 0.5mg/mL TET </li> | ||
+ | <li> LB 0.8% glucose, TET: 10 mL LB, 10µL AMP, 10µL CM, 0.4 mL 20% Glucose, 20µL 0.5mg/mL TET </li> | ||
+ | <li> LB 0.4% glucose: 10 mL LB, 10µL AMP, 10µL CM, 0.2 mL 20% Glucose </li> | ||
+ | <li> LB 0.8% glucose: 10 mL LB, 10µL AMP, 10µL CM, 0.4 mL 20% Glucose </li> | ||
+ | <li> M63B1 0.4% glucose, TET: 10 mL M63B1, 10µL AMP, 10µL CM, 10 µL 1M MgSO<sub>4</sub>*7H<sub>2</sub>O, 0.2 mL 20% Glucose, 19.7 µL TET </li> | ||
+ | <li> M63B1 0.8% glucose, TET: 10 mL M63B1, 10µL AMP, 10µL CM, 10 µL 1M MgSO<sub>4</sub>*7H<sub>2</sub>O, 0.4 mL 20% Glucose, 20 µL TET </li> | ||
+ | <li> M63B1 0.4% glucose: 10 mL M63B1, 10µL AMP, 10µL CM, 10 µL 1M MgSO<sub>4</sub>*7H<sub>2</sub>O, 0.2 mL 20% Glucose </li> | ||
+ | <li> M63B1 0.8% glucose: 10 mL M63B1, 10µL AMP, 10µL CM, 10 µL 1M MgSO<sub>4</sub>*7H<sub>2</sub>O, 0.4 mL 20% Glucose </li> | ||
+ | </ul> | ||
+ | <p> Biofilm assay: </p> | ||
+ | <ul> | ||
+ | <li> Pipette 3-4 mL overnight cultures to sterile tubes (total 16 tubes). </li> | ||
+ | <li> Centrifuge the cultures for 10 min at 2000 rpm at 9°C. </li> | ||
+ | <li> Remove the supernatant. </li> | ||
+ | <li> Add 3-4 mL media (LB/ M63B1, with 0.4%/ 0.8% glucose, with/ without TET) to 2 tubes each. </li> | ||
+ | <li> Resuspend/ vortex the cultures, and measure OD 600. </li> | ||
+ | <li> Dilute the cultures until target OD 600 = 0.1 and store the cells on ice until they are added to the wells. </li> | ||
+ | <li> Resuspend/ vortex the cultures, add 100 µL culture to each well on the plate. </li> | ||
+ | <li> Seal the top of the plate with parafilm, and incubate the plate at 37°C. </li> | ||
+ | <li> Do CV assay after 3 h, 5 h, 8 h, 24 h and 48 h incubation. </span></div> | ||
+ | </ul> | ||
+ | |||
+ | </li> | ||
+ | |||
+ | <!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | ||
+ | |||
+ | </li> | ||
+ | |||
+ | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
+ | <!------------------------------------------- WEEK ---------------------------------------------------> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Week | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 34 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p style="font-size:120%;">Week 34</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | |||
+ | <!----------------------------------------- DAYS IN WEEK -------------------------------------------> | ||
+ | <ul class="collapsible"> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Aug | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 20 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Preparation for 3h, 5h, 8h, 24h, 30h CV and Bactiter-Glo Assay.</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <b>Goal:</b> | ||
+ | |||
+ | <p>Redo CV assay from 17th August to check the validity of previous results.</p> | ||
+ | |||
+ | <p>Perform Bactiter-Glo Assay parallell to CV Assay (3h, 5h, 8h, 24h, 30h) to examine the amount of living cells in biofilm.</p> | ||
+ | |||
+ | <b>Procedure:</b> | ||
+ | |||
+ | <p>Crystal Violet Assay: Same procedure as from 17.08.2018.</p> | ||
+ | |||
+ | <p> Bactiter-Glo Assay</p> | ||
+ | <b>Results:</b> | ||
+ | <p>The results and measurement settings can be found in the attached files.</p> | ||
+ | </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Aug | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 21 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
Line 994: | Line 2,341: | ||
</div> | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
− | + | 22 | |
</div> | </div> | ||
</div> | </div> | ||
</div> | </div> | ||
− | <p> | + | <p>No lab</p></div> |
− | <div class="collapsible-body"><span> | + | <div class="collapsible-body"><span>No lab.</span></div> |
</li> | </li> | ||
<li> | <li> | ||
Line 1,007: | Line 2,354: | ||
<div class="date-display-month"> | <div class="date-display-month"> | ||
Aug | Aug | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 23 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Aug | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 24 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
+ | </li> | ||
+ | |||
+ | </ul> | ||
+ | <!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | ||
+ | |||
+ | </li> | ||
+ | |||
+ | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
+ | |||
+ | <!------------------------------------------- WEEK ---------------------------------------------------> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Week | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 35 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p style="font-size:120%;">Week 35</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | |||
+ | <!----------------------------------------- DAYS IN WEEK -------------------------------------------> | ||
+ | <ul class="collapsible"> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Aug | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 27 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Aug | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 28 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Aug | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 29 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Aug | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 30 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Aug | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 31 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
+ | </li> | ||
+ | |||
+ | </ul> | ||
+ | <!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | ||
+ | |||
+ | </li> | ||
+ | |||
+ | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
+ | |||
+ | <!------------------------------------------- WEEK ---------------------------------------------------> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Week | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 36 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p style="font-size:120%;">Week 36</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | |||
+ | <!----------------------------------------- DAYS IN WEEK -------------------------------------------> | ||
+ | <ul class="collapsible"> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 3 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 4 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 5 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Introduction of site directed mutagenesis on pdCas9 and make medium for V. natrigens</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <b>Goal:</b> | ||
+ | |||
+ | <p>Make LB medium and 10x v2 salts for Vibrio natrigens</p> | ||
+ | <p>Amplify and introduce site directed mutagenesis in pdCas9</p> | ||
+ | |||
+ | <b>Procedure:</b> | ||
+ | |||
+ | <p> LB - medium </p> | ||
+ | |||
+ | <p>10x v2 salts:</p> | ||
+ | |||
+ | Make the salt solutions after the following recipe: | ||
+ | |||
+ | <ul> | ||
+ | <li>11.935 g NaCl (204 mM)</li> | ||
+ | |||
+ | <li>0.3134 g KCl (4.2 mM)</li> | ||
+ | |||
+ | <li>4.710 g MgCl2*6H2O (23.14 mM)</li> | ||
+ | |||
+ | <li>1 L ddH2O</li> | ||
+ | |||
+ | </ul> | ||
+ | |||
+ | <p>Site directed mutagenesis:</p> | ||
+ | |||
+ | Forward and reverse primers for site directed mutagenesis were designed and ordered from Sigma Aldrich. | ||
+ | |||
+ | Introduce site directed mutagenesis in pgCas9 via PCR after following the protocol from 29. June. 2018. | ||
+ | |||
+ | The first PCR was not successful. The primer annealing temperature was changed, and the elongation time as well. | ||
+ | </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 6 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Introduce site directed mutagenesis in pdCas9 and amplify RRvT and pSB1C3e</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b> | ||
+ | |||
+ | Introduce site directed mutagenesis in pdCas9 | ||
+ | Amplify RRvT and pSB1C3 via PCR </p> | ||
+ | |||
+ | |||
+ | |||
+ | <p><b>Procedure:</b> | ||
+ | |||
+ | Site directed mutagenesis in dCas9: | ||
+ | |||
+ | pdCas9 was amplified via gradient PCR, where the annealing temperatures were 57.3 ℃, 59.3 ℃, 61.1 ℃ and 64.1℃ with an elongation time for 5 min. | ||
+ | |||
+ | The samples were stored in the fridge after the PCR was finished. | ||
+ | |||
+ | Amplification of RRvT and pSB1C3: | ||
+ | |||
+ | RRvT and pSB1C3 fragments were amplified by running the samples (6 µL FW primer, 6 µL REV primer, 1 µL template, 12.5 µL Takara Hi-Fi PCR premix) on PCR with the following settings: annealing temperature 37 ℃ for 10 s, elongation temperature 72 ℃ for 1 min. | ||
+ | |||
+ | The samples were stored in the fridge after the PCR was finished. </p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 7 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Gel purification of PCR products (pdCas9, RRvT and pSB1C3), incubate V. natriegens</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <b>Goal:</b> | ||
+ | |||
+ | <p>Separate the PCR products of RRvT and pSB1C3 on gel, and miniprep the desired fragments on the gel. | ||
+ | Incubate Vibrio natreigens (V. natriegens). | ||
+ | Do another round of site directed mutagenesis on pdCas9 via PCR.</p> | ||
+ | <b>Procedure:</b> | ||
+ | |||
+ | <b>Gel purification of RRvT and pSB1C3 on gel:</b> | ||
+ | |||
+ | <p> 5 μL loading dye was added to the PCR products (25.5 μL). | ||
+ | The PCR products were separated on Gel green (90 V, 40 min). | ||
+ | The desired fragments were cut out from the gel and collected in eppendorf tubes | ||
+ | Gel digestion and DNA isolation of RRvT and fragment of pSB1C3: | ||
+ | |||
+ | The PCR products with the desired length on the gel was isolated by following after the same protocol from 02.07.2018.</p> | ||
+ | |||
+ | <b>Inoculation and incubation of V. natriegens:</b> | ||
+ | |||
+ | <p>Sample of V. natriegens sent by the iGEM team from Marburg, was inoculated and incubated by following after the protocol provided by the team.</p> | ||
+ | |||
+ | <b>Introduce site directed mutagenesis in pdCas9: </b> | ||
+ | |||
+ | <p>PCR mix with pdCas9 was prepared after following the same protocol from 29.06.2018. | ||
+ | Two samples were set on two different programs: | ||
+ | 3 step PCR: DNA denaturation temperature at 98℃, primer annealing temperature at 55 ℃ for 10 s, elongation temperature at 72 ℃ for 7 min. | ||
+ | 2 step PCR: same conditions as 3 step PCR without the primer annealing step.</p> | ||
+ | </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 8 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Purification of RRvT, separation of PCR product of pdCas9 and measurement of growth curve of V. natriegens (failed)</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <b>Goal:</b> | ||
+ | |||
+ | <ul> | ||
+ | <li>Measure the growth curve of V. natrigens</li> | ||
+ | <li>Gel purification of RRvT</li> | ||
+ | <li>Separte the PCR products of pdCas9 on gel</li> | ||
+ | </ul> | ||
+ | |||
+ | <b>Procedure:</b> | ||
+ | |||
+ | <p>Growth curve of V. natrigens:</p> | ||
+ | |||
+ | <p>The experiment failed due to dilution in the flasks and not in the cuvettes</p> | ||
+ | |||
+ | <p>Gel purification of RRvT:</p> | ||
+ | |||
+ | <p>The PCR product of RRvT was purified on gel, and the DNA was isolated after following the same protocol from 02.07.2018.</p> | ||
+ | |||
+ | <p>Gel separation of pdCas9 PCR product:</p> | ||
+ | |||
+ | <p>The PCR products of pdCas9 were separated on both gel red and gel green for imaging and for isolation of the desired fragments by following the same protocol from 02.07.2018.</p> | ||
+ | |||
+ | <p> See results page for results </p>. | ||
+ | |||
+ | </span></div> | ||
+ | </li> <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 9 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Amplification of RRvT and introduce SDM in pdCas9</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <p>Amplify RRvT and introduce SDM in pdCas9 via PCR</p> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>RRvT and introduction of pdCas9 was necessary since the concentration of the products isolated from gel on 08.09.2018 were too low.</p> | ||
+ | |||
+ | <p>Amplification of RRvT:</p> | ||
+ | |||
+ | <p>RRvT was amplified via PCR with an annealing temperature 55 ℃ for 10 s and elongation temperature at 72 ℃ for 1 min.</p> | ||
+ | |||
+ | <p>Introduce SDM in pdCas9:</p> | ||
+ | |||
+ | <p>Site directed mutagenesis was introduced via PCR with an annealing temperature at 55 ℃ for 10 s and elongation temperature 72 ℃ for 7 min.</p> | ||
+ | |||
+ | <p>The products were stored in the fridge.</p> </span></div> | ||
+ | </li> | ||
+ | |||
+ | </ul> | ||
+ | <!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | ||
+ | |||
+ | </li> | ||
+ | |||
+ | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
+ | <!------------------------------------------- WEEK ---------------------------------------------------> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Week | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 37 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p style="font-size:120%;">Week 37</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | |||
+ | <!----------------------------------------- DAYS IN WEEK -------------------------------------------> | ||
+ | <ul class="collapsible"> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 10 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Gibson assembly of RRvT and backbon and transformation of SDM pdCas9 and assembled RRvT into competent cells</p></div> | ||
+ | <div class="collapsible-body"><span><p> | ||
+ | <b>Goal:</b> | ||
+ | |||
+ | <p>Gel purification of PCR products | ||
+ | Gel digestion and isolation of desired DNA fragments | ||
+ | Assemble RRvT and pSB1C3 via Gibson assembly | ||
+ | Transform pdCas9 and the assembled RRvT into competent cells</p> | ||
+ | |||
+ | <b>Procedure:</b> | ||
+ | |||
+ | <p>Gel purification: | ||
+ | |||
+ | The PCR products were separated on gel green | ||
+ | |||
+ | RRvT: 25.5 µL DNA, 5.05 µL loading dye | ||
+ | |||
+ | pdCas9: 25 µL DNA, 5 µL loading dye</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Gel digestion and DNA isolation:</p> | ||
+ | |||
+ | |||
+ | <p>The desired fragments (RRvT: approx. 2000 bp, pdCas9: approx. 6000 – 7000 bp) were cut out from the gel. The gel was digested by following after the protocol from 02.07.18.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Transformation of SDM pdCas9 into competent cells:</p> | ||
+ | |||
+ | <p>6 µL DNA was transformed into competent cells by following after the protocol from 25.06.18.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Gibson assembly of RRvT and pSB1C3:</p> | ||
+ | |||
+ | <p>The fragments were assembled together by following the protocol provided from the kit | ||
+ | |||
+ | 2 µL RRvT, 8 µL pSB1C3 (0.03 – 0.2 pmol fragments), 10 µL assembly master mix was incubated in a thermocycler at 50C for 15 min. The sample was stored on ice for transformation.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Transformation of assembled RRvT and pSB1C3 into competent cells:</p> | ||
+ | |||
+ | <p>2 µL Gibson assembly product was transformed into competent cells by following after the protocol from 25.06.2018. </p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 11 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>PCR colony screening, isolation and verify successful SDM on pdCas9</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>PCR colony screening of RRvT gene</li> | ||
+ | <li>Isolate pdCas9 from cell cultures</li> | ||
+ | <li>Verify successful SDM on pdCas9 by restriction digest the plasmid</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>PCR colony screening:</p> | ||
+ | |||
+ | <p>None of the colonies were red/ pink coloured like the colonies with RFP.</p> | ||
+ | |||
+ | <p>PCR colony screening was done to test whether assembly of RRvT and pSB1C3 fragments was successful</p> | ||
+ | |||
+ | <p>PCR mix was prepared after the following protocol: | ||
+ | 5 µL Takara Hi-Fi PCR premix, 1 µL ddH2O, 6 µL RRvT FWD primer, 6 µL RRvT REV primer | ||
+ | 8 different colonies were chosen and transferred to a new agar plate with CM, before the colony was transferred to a PCR tube with PCR mix. | ||
+ | The samples ran on a PCR machine with the same settings from day 28 – 06. 09. 2018.</p> | ||
+ | |||
+ | |||
+ | <p>Plasmid isolation:</p> | ||
+ | |||
+ | <p>pdCas9 with SDM was isolated from three cell replicates by following the protocol from day 3 – 22. 06. 2018.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Restriction digest:</p> | ||
+ | |||
+ | <p>Introduction of SDM in pdCas9 was verified by adding restriction enzyme which originally recognize and cut at a specific site in the plasmid. EcoRI has two restriction sites in pdCas9 before any mutations.</p> | ||
+ | |||
+ | <p>Mix 2 µL DNA (pdCas9 SDM), 2 µL Cut smart buffer, 15.5 µL ddH2O, 0.5 µL EcoRI Hi-Fi | ||
+ | Spin down the solutions | ||
+ | Incubate overnight at 37 ℃</p> | ||
+ | </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 12 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Gel separation of digested pdCas9 (SDM) and products from PCR colony screening of RRvT, amplification of pdCas9 fragments for Gibson assembly</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Separate the DNA fragments of pdCas9 SDM after restriction digest</li> | ||
+ | <li>Visualize the products from PCR colony screening on gel</li> | ||
+ | <li>Amplify the different fragments of pdCas9 for Gibson assembly</li> | ||
+ | <li>Inoculate colonies with RRvT in LB medium with CM</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Gel electrophoresis:</p> | ||
+ | |||
+ | <p>Both pdCas9 fragments obtained from restriction digest, and the products from PCR colony screening of RRvT were separated and visualized on gel by mixing the DNA with loading dye</p> | ||
+ | |||
+ | <p>RRvT: 3 µL DNA, 2 µL dye, 7 µL ddH2O</p> | ||
+ | |||
+ | <p>pdCas9: add 4 µL loading dye to each samples</p> | ||
+ | |||
+ | <p>The DNA fragments were separated on gel red.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Preparation for Gibson assembly of pdCas9:</p> | ||
+ | |||
+ | <p>Segments for Gibson assembly were obtained by amplify the desired fragments with designed primer pairs via PCR.</p> | ||
+ | |||
+ | <p>Primers for Gibson assembly (ordered from Sigma Aldrich), were resuspended with ddH2O and diluted to 1 µ | ||
+ | Dilute pdCas9 SDM – 2 µL DNA (PC1), 8 µL ddH2O (to obtain <26 ng/µL) | ||
+ | PCR samples (1 µL diluted template (pdCas9 SDM, <26 ng/μL), 6 µL FWD primer, 6 µL REV primer, 12.5 µL Takara HI-FI PCR premix) were incubated in PCR machine with the same settings from day 29 – 07. 09. 2018.</p> | ||
+ | |||
+ | |||
+ | <p>Inoculate cell colonies with RRvT:</p> | ||
+ | |||
+ | <p>Colonies with RRvT was inoculated in LB medium with CM from the agar plate, and the cell cultures were incubated overnight at 37 ℃ with shaking.</p> | ||
+ | |||
+ | <p>Cells were inoculated from the following agar plate. | ||
+ | Cells with RFP were revived in LB medium with CM.</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 13 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Gel purification, isolation and Gibson assemble the PCR products of pdCas9 fragments, transformation of Gibson assembled product, fluorescence test round of RRvT</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Gel purification of the PCR product of pdCas9 fragments</li> | ||
+ | <li>Gel digestion and isolation of the pdCas9 fragments</li> | ||
+ | <li>Gibson assemble the pdCas9 fragments</li> | ||
+ | <li>Transformation of Gibson assembled product into competent cells</li> | ||
+ | <li>Test round of RRvT by measuring the fluorescence</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Gel purification of pdCas9 fragments:</p> | ||
+ | |||
+ | <p>25.5 µL PCR products were mixed with 5.05 µL loading dye, and separated on gel by following after the same procedure from 22.06.2018.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Gel digest and DNA isolation:</p> | ||
+ | |||
+ | <p>After gel electrophoresis, the desired pdCas9 fragments were cut out from the gel. The gel was digested and the DNA fragments were isolated by conducting the same protocol from 02.07.2018.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Gibson assembly of the pdCas9 fragments:</p> | ||
+ | |||
+ | <p>The pdCas9 fragments, isolated from the gel, were assembled after the following protocol</p> | ||
+ | |||
+ | <p>Mix 0.60 µL G1 fragment, 3.49 µL G2 fragment, 3.67 µL G3 fragment, 2.24 µL G4 fragment (the volumes were calculated by our instructor) with 10 µL NEBuilder HiFi DNA Assembly Master mix, and the sample was incubated at 50 ℃ for 1 hour.</p> | ||
+ | |||
+ | <p>The thermocycler was switched off without notice, so the samples stayed at room temperature for an hour before the thermocycler was turned on again…</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Transformation of Gibson assembly product:</p> | ||
+ | |||
+ | <p>2 µL Gibson assembly product was transformed into DH5α cells by following after the procedure from 25. 06. 2018</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Measure the fluorescence of RRvT:</p> | ||
+ | |||
+ | <p>The overnight cultures with RRvT, RFP and a negative control was diluted until target absorbance Abs600 = 0.1 | ||
+ | Four replicates of each culture (100 µL) were added to a 96 well microtiter plate. | ||
+ | The Absorbance and the fluorescence were measured with the following settings: | ||
+ | 150 cycles with 5 min interval | ||
+ | Emission wavelength: 607 nm | ||
+ | Exitation wavelength: 584 nm | ||
+ | Temperature: 37 ℃ | ||
+ | Gain: 22</p> | ||
+ | |||
+ | |||
+ | <p><b>Results:</b></p> | ||
+ | |||
+ | <p>Gel purification of pdCas9 fragments for Gibson assembly:</p> | ||
+ | |||
+ | <p>The order of the different fragments from left to right: ladder, G1, G2, G3 and G4. The fragments for Gibson assembly should have the length of 641 bp, 481 bp, 2917 bp and 1468 bp, respectively.</p> | ||
+ | |||
+ | <p>Fluorescence of RRvT:</p> | ||
+ | |||
+ | <p>The values of the fluorescence were too low when the samples were measured with a gain of 22. The liquid in the wells has been evaporated during the measurement.</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 14 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Inoculate successful transformed cells, Restreak V. natriegens, amplify gRNA and dCas9 for insertion into LITMUS28i vector</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Inoculate successful transformed cells</li> | ||
+ | <li>Restreak V. natriegens on agar plates</li> | ||
+ | <li>Amplify gRNA and dCas9 (without mutation) sequence for insertion into LITMUS28i vector</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Colony picking:</p> | ||
+ | |||
+ | <p>Successful transformed cells (probably with correct Gibson Assembly product of pdCas9) were inoculated to LB medium with CM. The cell cultures were incubated at 37 ℃ overnight with shaking.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Re-streak Vibrio natriegens on agar plates:</p> | ||
+ | |||
+ | <p>Vibrio natriegens was inoculated and was stoke on LA with v2 salt aseptically. The agar plates were incubated at room temperature.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Amplification of gRNA and dCas9:</p> | ||
+ | |||
+ | <p>The primer pairs of gRNA and dCas9 (ordered from Sigma Aldrich) were diluted with ddH2O, so the concentration of the primers was 100 µM | ||
+ | The primers were further diluted until target concentration = 1 µM | ||
+ | PCR mix were prepared after the following recipe: | ||
+ | pgRNA (0.5 µL, 37.2 ng/ µL), 6 µL FWD primer, 6 µL REV primer, 12.5 µL Takara HiFi PCR premix. | ||
+ | pdCas9 (0.5 µL, 53.4 ng/ µL), 6 µL FWD primer, 6 µL REV primer, 12.5 µL Takara HiFi PCR premix. | ||
+ | The gRNA sequence was amplified by running the sample with a PCR machine with an annealing temperature 55 ℃ for 10 s, and an elongation temperature 72 ℃ for 1 min. The dCas9 sequence was amplified with an annealing temperature 55 ℃ for 10 s, and an elongation temperature 72 ℃ for 7 min.</p> </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 15 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Isolation, digestion of Gibson assembled pdCas9, gel digestion and isolation of gRNA and dCas9 fragments (for insertion into LITMUS28i), inoculation of V. natriegens</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Isolate Gibson assembled pdCas9 from overnight cultures</li> | ||
+ | <li>Test digest the Gibson assembled pdCas9</li> | ||
+ | <li>Make glycerol stock of cells with Gibson assembled pdCas9 (pdCas9 mutated)</li> | ||
+ | <li>Gel separate the PCR products of gRNA and dCas9 (for insertion into LITMUS28i vector)</li> | ||
+ | <li>Gel digest and isolate the gRNA and dCas9 fragments (for insertion into LITMUS28i vector)</li> | ||
+ | <li>Inoculate natriegens in LB medium with v2 salts</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Isolation of Gibson assembled pdCas9:</p> | ||
+ | |||
+ | <p>Overnight cultures were diluted until OD600 ≈9 | ||
+ | pdCas9 was isolated from the cells by following after the miniprep protocol from 22.06.2018.</p> | ||
+ | |||
+ | |||
+ | <p>Test digest Gibson assembled pdCas9:</p> | ||
+ | |||
+ | <p>The enzymes EcoRI and XbaI were selected to verify whether the Gibson assembly of pdCas9 was successful or not. For 0.5 µL enzyme, 250 ng DNA is required. The different replicates were prepared by following recipe:</p> | ||
+ | |||
+ | <p>PC1: 5 µL DNA, 2 µL Buffer, 0.5 µL EcoRI, 0.5 µL XbaI, 12 µL ddH2O</p> | ||
+ | |||
+ | <p>PC2: 7 µL DNA, 2 µL Buffer, 0.5 µL EcoRI, 0.5 µL XbaI, 10 µL ddH2O</p> | ||
+ | |||
+ | <p>PC3: 12 µL DNA, 2 µL Buffer, 0.5 µL EcoRI, 0.5 µL XbaI, 5 µL ddH2O</p> | ||
+ | |||
+ | <p>The samples were incubated at 37 ℃ for 3h, before gel separation.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Glycerol stock of Gibson assembled pdCas9 (pdCas9 mutated):</p> | ||
+ | |||
+ | <p>DH5α cells with the Gibson assembled pdCas9 were stored in glycerol stock at -80 ℃ by following after the procedure from day 28.06.2018.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Gel separation of gRNA and dCas9 (not mutated) fragments (for insertion into LITMUS28i vector):</p> | ||
+ | |||
+ | <p>5 µL loading dye was added to each sample. The samples ran on gel green at 90 V for 50 min.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Gel digest and DNA isolation:</p> | ||
+ | |||
+ | <p>The gRNA and dCas9 fragments were isolated from the gel by conducting the same protocol from 02.07.2018.</p> | ||
+ | |||
+ | |||
+ | <p>Incoulation of V. natriegens:</p> | ||
+ | |||
+ | <p>Coloies of V. natriegens were inoculated into LB medium with v2 salt. The cell cultures were incubated at 37 ℃ overnight with shaking.</p> | ||
+ | </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 16 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Transformation of plasmid with TetR into competent cells, mak glycerol stocks of V. natriegens</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Transform the part BBa_R0040 (plasmid with TetR) into competent cells</li> | ||
+ | <li>Make glycerol stocks of natriegens</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Transformation of BBa_R004:</p> | ||
+ | |||
+ | <p>The plasmid was resuspended with 10 µL ddH2O in the well of the plate (provided by iGEM).</p> | ||
+ | |||
+ | <p>10 µL DNA was transformed into DH5α by following after the protocol from 25.06.2018.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Glycerol stock of Vibrio natriegens:</p> | ||
+ | |||
+ | <p>Overnight cultures of V. natriegens was stored in glyrecol stock at -80 ℃.</p></span></div> | ||
+ | </li> | ||
+ | |||
+ | </ul> | ||
+ | <!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | ||
+ | |||
+ | </li> | ||
+ | |||
+ | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
+ | <!------------------------------------------- WEEK ---------------------------------------------------> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Week | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 38 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p style="font-size:120%;">Week 38</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | |||
+ | <!----------------------------------------- DAYS IN WEEK -------------------------------------------> | ||
+ | <ul class="collapsible"> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
</div> | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
17 | 17 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Amplification of LITMUS28i vector, inoculation of successful transformed cells, revive cells with RRvT and RFP</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Amplification of LITMUS28i sequence</li> | ||
+ | <li>Inoculate successful transformed cells with part BBa_R0040 (plasmid with TetR)</li> | ||
+ | <li>Revive cells with RRvT and RFP</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Amplification of LITMUS28i sequence:</p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Designed primers (bought from Sigma Aldrich) were resuspended and diluted to 1 μM.</li> | ||
+ | <li>The LITMUS28i vector (sponsored by NEB) was diluted to 25 ng/μ</li> | ||
+ | <li>The diluted primer pair (6 μL of each primer) for LITMUS28i was mixed with the diluted LITMUS28i vector (1 μL) and Takara HiFi PCR premix (12.5 μL).</li> | ||
+ | <li>The LITMUS 28i sequence was amplified after running in a PCR machine with an annealing temperature of 55 ℃ for 10 s and elongation temperature 72 ℃ for 2 min.</li> | ||
+ | </ul> | ||
+ | |||
+ | <p>Inoculation of successful transformed cells:</p> | ||
+ | |||
+ | <p>Successful transformed cells with TetR was inoculated into LB medium with CM. The cell culture was incubated overnight at 37 ℃ with shaking.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Revive cells with RRvT and RFP:</p> | ||
+ | |||
+ | <p>Cells stored at -80 ℃ were revived by inoculation into LB medium with CM and incubated overnight at 37 ℃ with shaker.</p> | ||
+ | </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 18 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Measure the fluorescence of RRvT, separation and isolation of LITMUS28i fragment, Gibson assemble LITMUS28i fragment, dCas9 and gRNA</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Measure the fluorescence of RRvT, RFP and TetR</li> | ||
+ | <li>Separate LITMUS28i sequence on gel</li> | ||
+ | <li>Gel digest and isolate LITMUS28i segment</li> | ||
+ | <li>Gibson assemble LITMUS28i sequence, dCas9 and gRNA with anti-luxS</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Fluorescence measurement:</p> | ||
+ | |||
+ | <ul> | ||
+ | <li>The overnight cell cultures with RRvT, RFP and TetR were diluted to target Abs600 = 0,2.</li> | ||
+ | <li>100 μL of each cell cultures were pipetted to a 96 well plate with 4 replicates. The cellcultres were surrounded with LB medium with CM to reduce evaporation of the cell cultures in the wells. The plate was covered with a lid and the plate was sealed with parafilm.</li> | ||
+ | <li>The absorbance and the fluorescence were measured with a five-minute interval for 150 cycles with a target temperature 37 ℃. The gain was set to 40, wave length of absorbance was set to 588 nm, while the excitation and the emission wavelength were set to 584 nm and 607 nm, respectively.</li> | ||
+ | </ul> | ||
+ | |||
+ | <p>Gel electrophoresis:</p> | ||
+ | |||
+ | <p>05 μL loading dye was added to the PCR product of LITMUS28i vector (25 μL). | ||
+ | The PCR product was separated on gel green, and the desired sequence was cut out from the gel.</p> | ||
+ | |||
+ | |||
+ | <p>Gel digest and DNA isolation:</p> | ||
+ | |||
+ | <p>The desired DNA sequence was isolated by digesting the gel by conducting the same procedure from 02.07.2018.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Gibson assembly:</p> | ||
+ | |||
+ | <p>LITMUS28i, dCas9 and gRNA with anti-luxS were assembled via Gibson assembly. The amount (pmol) required of the different fragments were calculated by the calculator provided by the homepage of NEB, and by following after the protocol of NEBuilder HiFi DNA Assembly</p> | ||
+ | |||
+ | <p>LITMUS28i sequence (2295 bp, 68 ng/μL): 0.8 μL | ||
+ | gRNA (538 bp, 43 ng/μL): 0.59 μL | ||
+ | dCas9 (5025 bp, 52 ng/ μL): 4.92 μL | ||
+ | NEBuilder HiFi DNA assembly master mix: 10 μL | ||
+ | ddH2O: 3.69 μL</p> | ||
+ | |||
+ | <p>The sample was incubated at 50 ℃ for an hour. The sample was stored in the fridge</p> | ||
+ | |||
+ | <p><b>Results:</b></p> | ||
+ | |||
+ | <p>Fluorescence measurement of RRvT:</p> | ||
+ | |||
+ | <p>The fluorescence of RRvT and RFP was constant over time, and the value of the fluorescence of RRvT and RFP was lower than the fluorescence measured from the medium...</p> | ||
+ | </span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 19 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Measure growth curve of V. natriegens, transformation of Gibson assembled LITMUS28i, test digest mutated pdCas9</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Measure the growth curve of V. natriegens</li> | ||
+ | <li>Transform Gibson assembled LITMUS28i (with unmutated dcas9 and gRNA with anti-luxS) into DH5α cells</li> | ||
+ | <li>Test digest the mutated pdCas9 with EcoRI and SpeI</li> | ||
+ | </ul> | ||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Growth curve of V. natriegens:</p> | ||
+ | |||
+ | <p>Overnight cultures were diluted to a target OD600 = 0.05 in 250 mL baffled flasks with a final volume 40 mL. | ||
+ | The cell cultures were incubated at 37 ℃ with shaking. | ||
+ | The OD600 of each replicate was measured after 10 min incubation for 5 hours.</p> | ||
+ | |||
+ | |||
+ | <p>Transformation of Gibson assembled LITMUS28i vector:</p> | ||
+ | |||
+ | <p>2 μL Gibson assembled LITMUS28i vector that consists unmutated dCas9 and gRNA with anti-luxS was transformed into competent cells after following the same procedure from 25.06.2018.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Restriction digest the mutated pdCas9:</p> | ||
+ | |||
+ | <p>The mutated pdCas9 was cut with EcoRI and SpeI by mixing 5 μL DNA (PC1), 2 μL cut smart buffer, 0.5 μL EcoRI, 0.5 μL SpeI and 12 μL dH2O. The reagent was incubated overnight at 37 ℃.</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 20 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Gel separation of digested pdCas9 (mutated), preparation of ligation of mutated dCas9 and iGEM backcone</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <p><b>Goal:</b></p> | ||
+ | |||
+ | <p>Gel separation of the product from the enzyme digestion of mutated pdCas9</p> | ||
+ | <p>Digestion of mutated pdCas9 and pSB1C3 (preparation for ligation of dCas9 and pSB1C3).</p> | ||
+ | |||
+ | |||
+ | <p><b>Procedure:</b></p> | ||
+ | |||
+ | <p>Gel electrophoresis:</p> | ||
+ | |||
+ | <p>The products of enzyme digestion of mutated pdCas9 that has been incubated overnight, were mixed with 3.34 μL loading dye. The DNA segments were separated after running them on gel red at 90 V for 45 min.</p> | ||
+ | |||
+ | |||
+ | |||
+ | <p>Digestion of mutated pdCas9 and pSB1C3:</p> | ||
+ | |||
+ | <p>The DNA were digested after the following recipe</p> | ||
+ | |||
+ | <p>pdCas9: 5 μL DNA (PC1, 50.8 ng/μL), 2 μL 2.1 buffer, 0.5 μL EcoRI, 0.5 μL PstI, 12 μL ddH2O. | ||
+ | |||
+ | Linear pSB1C3: 10 μL DNA (linear pSB1C3, 25 ng/μL), 2 μL 2.1 buffer, 0.5 μL EcoRI, 0.5 μL PstI, 7 μL ddH2O.</p> | ||
+ | |||
+ | <p>The samples were incubated at 37 ℃ overnight.</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 21 | ||
</div> | </div> | ||
</div> | </div> | ||
Line 1,023: | Line 3,376: | ||
<!------------------------------------------- END OF WEEK ---------------------------------------------> | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
− | + | <!------------------------------------------- WEEK ---------------------------------------------------> | |
<li> | <li> | ||
<div class="collapsible-header"> | <div class="collapsible-header"> | ||
Line 1,032: | Line 3,385: | ||
</div> | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
− | + | 39 | |
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p style="font-size:120%;">Week 39</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | |||
+ | <!----------------------------------------- DAYS IN WEEK -------------------------------------------> | ||
+ | <ul class="collapsible"> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 24 | ||
</div> | </div> | ||
</div> | </div> | ||
</div> | </div> | ||
<p>Note title</p></div> | <p>Note title</p></div> | ||
+ | <div class="collapsible-body"><span>Lorem ipsum dolor sit amet.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 25 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 26 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 27 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Sept | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 28 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Note title</p></div> | ||
+ | <div class="collapsible-body"><span>Lorem ipsum dolor sit amet.</span></div> | ||
+ | </li> | ||
+ | |||
+ | </ul> | ||
+ | <!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | ||
+ | |||
+ | </li> | ||
+ | |||
+ | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
+ | <!------------------------------------------- WEEK ---------------------------------------------------> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Week | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 40 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p style="font-size:120%;">Week 40</p></div> | ||
<div class="collapsible-body"><span> | <div class="collapsible-body"><span> | ||
Line 1,046: | Line 3,499: | ||
<div class="date-display-cal"> | <div class="date-display-cal"> | ||
<div class="date-display-month"> | <div class="date-display-month"> | ||
− | + | Oct | |
</div> | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
− | + | 1 | |
</div> | </div> | ||
</div> | </div> | ||
Line 1,061: | Line 3,514: | ||
<div class="date-display-cal"> | <div class="date-display-cal"> | ||
<div class="date-display-month"> | <div class="date-display-month"> | ||
− | + | Oct | |
</div> | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
− | + | 2 | |
</div> | </div> | ||
</div> | </div> | ||
Line 1,076: | Line 3,529: | ||
<div class="date-display-cal"> | <div class="date-display-cal"> | ||
<div class="date-display-month"> | <div class="date-display-month"> | ||
− | + | Oct | |
</div> | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
− | + | 3 | |
</div> | </div> | ||
</div> | </div> | ||
Line 1,091: | Line 3,544: | ||
<div class="date-display-cal"> | <div class="date-display-cal"> | ||
<div class="date-display-month"> | <div class="date-display-month"> | ||
− | + | Oct | |
</div> | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
− | + | 4 | |
</div> | </div> | ||
</div> | </div> | ||
Line 1,100: | Line 3,553: | ||
<p>Note title</p></div> | <p>Note title</p></div> | ||
<div class="collapsible-body"><span>Lorem ipsum dolor sit amet.</span></div> | <div class="collapsible-body"><span>Lorem ipsum dolor sit amet.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 5 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Note title</p></div> | ||
+ | <div class="collapsible-body"><span>Lorem ipsum dolor sit amet.</span></div> | ||
+ | </li> | ||
+ | </ul> | ||
+ | <!-------------------------------------- END OF DAYS IN WEEK ----------------------------------------> | ||
+ | |||
+ | </li> | ||
+ | |||
+ | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
+ | |||
+ | <!------------------------------------------- WEEK ---------------------------------------------------> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Week | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 41 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p style="font-size:120%;">Week 41</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | |||
+ | <!----------------------------------------- DAYS IN WEEK -------------------------------------------> | ||
+ | <ul class="collapsible"> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 8 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Note title</p></div> | ||
+ | <div class="collapsible-body"><span>Lorem ipsum dolor sit amet.</span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 9 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span>No lab.</span></div> | ||
</li> | </li> | ||
<li> | <li> | ||
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− | + | Oct | |
</div> | </div> | ||
<div class="date-display-day"> | <div class="date-display-day"> | ||
− | + | 10 | |
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>No lab</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 11 | ||
+ | </div> | ||
+ | </div> | ||
+ | </div> | ||
+ | <p>Double transformation with pgRNA and new pdCas9</p></div> | ||
+ | <div class="collapsible-body"><span> | ||
+ | <b>Goal:</b> | ||
+ | |||
+ | <p>1. Transformation of pgRNA and pdCas9 into DH5a and TG1-cells.</p> | ||
+ | |||
+ | |||
+ | <b>Procedure:</b> | ||
+ | |||
+ | <p> | ||
+ | Both pdCas9(2) and pgRNA(2) with anti-luxS were simultaneously transformed into competent cells (DH5α) after the following protocol:</p> | ||
+ | |||
+ | <ul> | ||
+ | <li>Thaw competent cells on ice.</li> | ||
+ | <li>Add pdCas9(2) (5μL) and pgRNA(2) with anti-luxS (5μL) to the same tube containing competent cells.</li> | ||
+ | <li>Incubate the cells on ice for 20min.</li> | ||
+ | <li>Heat shock the cells for 45s at 42℃.</li> | ||
+ | <li>Incubate the cells on ice for 2min.</li> | ||
+ | <li>Add LB- medium (900μL).</li> | ||
+ | <li>Incubate the cells for 1.5h (max. 2h) at 37℃ with shaker.</li> | ||
+ | <li>Plate the cells (100μL) on agar with AMP and CM </li> | ||
+ | <li>Centrifuge the cell culture for 3min at 6800g.</li> | ||
+ | <li>Discard the supernatant (200μL)</li> | ||
+ | <li>Resuspend the pellet with the remining supernatant in the tube</li> | ||
+ | <li>Plate the cells (100μL) on agar with AMP and CM.</li> | ||
+ | </ul> | ||
+ | |||
+ | <b>Results: </b> | ||
+ | |||
+ | <p>Colonies on the plates with DH5a. No colonies on the plates with TG1.</p></span></div> | ||
+ | </li> | ||
+ | <li> | ||
+ | <div class="collapsible-header"> | ||
+ | <div class="date-display"> | ||
+ | <div class="date-display-cal"> | ||
+ | <div class="date-display-month"> | ||
+ | Oct | ||
+ | </div> | ||
+ | <div class="date-display-day"> | ||
+ | 12 | ||
</div> | </div> | ||
</div> | </div> | ||
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<!------------------------------------------- END OF WEEK ---------------------------------------------> | <!------------------------------------------- END OF WEEK ---------------------------------------------> | ||
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+ | |||
+ | <!------------------------------------------- END OF NOTEBOOK ---------------------------------------------> | ||
+ | |||
+ | </ul> | ||
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+ | </script> | ||
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+ | <script type="text/javascript"> | ||
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+ | {{:Team:NTNU_Trondheim/Footer}} |
Latest revision as of 13:56, 14 October 2018
In our lab journal we have thoroughly documented what we have done in the laboratory, what our goals each session has been, how we have worked and results from each session. If you want a closer look on our methods/receipies, take a look at our protocol.
-
Week25
Week 25
-
Jun20
Our first day in the laboratory!
Goal: Incubate the Escherichia coli (E. coli) samples which carry pgRNA and pdCas9 on agar plates separately with antibiotics.
1. LA- medium (1.5%) was made.
2. Two different agar plates were made – one containing ampicillin (AMP) and one containing chloramphenicol (CM).
Incubation of bacteria
Two Escherichia coli (E. coli) samples which carry pgRNA and pdCas9 plasmids respectively, were ordered from Addgene. E.coli carrying the pgRNA plasmid were plated on agar plates with AMP, while E.coli carrying the pdCas9 plasmid were plated on agar plates with CM. Incubation for 24 h at 37℃.
Results:
There was growth and single colonies on all the plates. -
Jun21
Inoculation of E.coli
Goal: Inoculate a colony from each agar plate in LB- medium with antibiotics.
Procedure
One colony of pgRNA- and pdCas9- bacteria were picked and inoculated in LB-media (25 mL) with 25 µL of the associated antibiotic (AMP or CM). The cell cultures were incubated at 37℃ in a shaking incubator at 204 rpm.
-
Jun22
Isolation and verification of pgRNA and pdCas9
Goal: Isolate and verify that the E.coli carry pgRNA and pdCas9.
Plasmid isolation
pgRNA and pdCas9 were isolated from the incubated bacteria prepared yesterday (June 21) by following the miniprep protocol.
Determine plasmid concentration and purity
The concentration of plasmids and the purity of each sample were determined by using Nanodrop.
Restriction digest and plasmid verification
The presence of pgRNA and pdCas9 in the cell cultures were verified after following the restriction digest protocol and separation of the DNA fragments by gel electrophoresis.
Week26Week 26
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Jun25
Transformation of pgRNA and pdCas9 into competent cells
Goal: Transform pgRNA and pdCas9 into competent cells (E.coli K-12 DH5α).
Procedure:
The extracted pgRNA and pdCas9 plasmid DNA were transformed into E.coli K-12 DH5α cells.
-
Jun26
Transfer successful transformed cells to LB-medium and preparation of standard curves for the InterLab study
Goal:
Inoculate successful transformed competent cells to LB-medium, and prepare the standard curves for InterLab study.
Procedure:
Inoculate colony from agar plates to LB-medium:
A colony from each agar plate was selected and inoculated to LB- medium with antibiotics. Competent cells with pgRNA were transferred to LB- medium with AMP, while competent cells with pdCas9 were inoculated into LB- medium with CM. The cell cultures were incubated at 37℃ with shaker.
Preparation of 1xPBS solution for the InterLab-study.
Preparation of agar plates with CM, LA- and LB-medium.
Preparation of standard curves for InterLab study:
Calibration 1: OD 600 reference point – LUDOX protocol
A conversion factor to transform absorbance data from plate reader into OD600 was obtained in spectrometer by measuring four replicates of LUDOX CL-X and ddH2O. The data were imported into Excel sheet.
Calibration 2: Particle standard curve – Microsphere protocol
The solution of silica beads provided in the kit from iGEM HQ, was vortexed before dilution with water (96 μL Silica beads in 904 μL dd H2O). A serial dilution of microspheres was obtained by adding 100 μL dd H2O into 4x11 wells (E2, F2, G2, H2…E12, F12, G12, H12) on a 96 well plate. Microsphere stock solution (200 μL) was pipetted into E1 and 100 μL of the solution was transferred to E2 and mixed well before transferring 100 μL to E3. The procedure repeated until 100 μL solution was pipetted into E11, and 100 μL was transferred to liquid waste. The dilution series was repeated for row F, G and H. The absorbance of the samples was measured by a plate reader with shaker at 24℃. The data were exported to Excel sheet.
Results:
Sett inn bilde her. -
Jun27
Isolation of pgRNA and pdCas9 from compentent cells (DH5α) and preparation of stock solution for calibration 3 for InterLab study
Goal:
Isolate plasmids from competent cells (DH5α), and prepare the fluorecein stock solution for InterLab study.
Procedure:
Dilution of cell cultures:
Each cell cultures (successful transformed competent cells from day 5 – 26.06.2018) (2.5 mL) were transferred into fresh LB-medium (22.5 mL) with CM (22.5 μL). The new cultures were incubated for about 2 hours at 37℃ with shaking .
Measurement of the cell density:
The cell density of the new cultures was measured at OD 600, after calibration with water (blank sample).
Plasmid isolation and determination of concentration:
The plasmids were isolated from the competent cell after the protocol of ZR plasmid miniprep kit (see lab journal from day 3 - 22. June. 2018).
The concentration of the plasmids was determined by using Nanodrop.
Restriction digest:
The plasmids from each culture (5 μL) were digested by mixing with 10xbuffer (2 μL), distilled water (12.5 μL) and restriction enzyme BspHI (0.5 μL). The solution was centrifuged down before the samples were incubated over night at 37℃.
Results: -
Jun28
Plasmid verification and storing the cell cultures
Goal:
Verify that the successfully transformed DH5α cells carry pgRNA or pdCas9, and store the cell cultures for future use.
Procedure:
Plasmid verification:
The digested plasmid samples from yesterday’s incubation (lab 6 – 27. June.2018) were separated by gel electrophoresis.
Bacteria glycerol stocks:
The cell cultures made from 27. June were stored in a glycerol stock (500 µL cell culture and 500 µL 50% glycerol) in the freezer at -80℃.
Results:
Plasmid verification:
L, pR1, pR2, pC1 and pC2 are the DNA-fragments from ladder solution, the two samples of pgRNA and pdCas9, respectively. From Figure 1 the two fragments with 1.5 kb and 1.0 kb were found from the fragments of pgRNA after digestion by BspHI. The fragment with 100 bp from the digested pgRNA is not visible on the gel, probably due to masking of the dye colour at the bottom of the gel. Two bands from the digested pdCas9 with 2.7 kb and 4 kb were also detected. By comparing the results og gel elecrophoresis obtained from today's experiment with the results from day 3 (22. June. 2018), one can clearly see that the bands with the expected length from successful transformed competent cells, are much clearer. Hence, this also indicate the samples from the successful transformed DH5α cells are purer, which is also true by comparing the results from Nanodrop (see day 6 - 27. June. 2018, and day 3 - 22. June. 2018). -
Jun29
Insertion of anti-luxS via PCR and fluorescence standard curve for InterLab study
Goal:
Insert anti-luxS in pgRNA plasmid, and generate fluorescence standard curve for the InterLab study.
Procedure:
Insertion of anti-luxS gene and amplification of pgRNA with PCR.
InterLab – Calibration 3
A fluorescence standard curve was generated from the data obtained after measuring the fluorescence of the serial dilution of fluorescein.
The fluorescence was measured with the following settings:
Temperature: 24℃
Gain (manual): 56
Wave length [nm] Band width [nm] Excitation 494 4 Emission 525 20
Results:
InterLab – Calibration 3:
Figure 1 shows the florescence standard curve in the concentration interval [0, 2.5 μM], with a R2 value of 0,9956. The model of the fluorescence standard curve is:
Week27Week 27
-
Jul2
Separation, isolation and transformation of linear DNA (pgRNA with anti-luxS)
Goal:
- Separate the PCR product from circular DNA
- Isolate the linear DNA (pgRNA with anti-luxS from the gel
- Transform the linear DNA into competent cells
- InterLab study - transformation of plasmids to competent cells
Procedure:
Separation of linear DNA from circular DNA:
The leaner DNA obtained from PCR (from day 8 – 29. June. 2018), was separated from the circular DNA (original plasmids) after running the sample (25 μL) mixed with loading dye (5 μl) on gel electrophoresis (gelGreen) simultaneously with a ladder (1 μL gene ruler + 1 μL loading dye + 4 μL dH2O) for 50 min at 90 V. The sample and the ladder were prepared by the gel electrophoresis protocol.
Gel digestion and DNA isolation:
The agarose was digested and the DNA was isolated from the sample following the gel purification protocol.
Determine the DNA concentration and purity:
The concentration and the purity of the isolated DNA was determined by using Nanodrop.
Transformation of PCR product to competent cells: The PCR product (5 μL) was transformed to competent cells after following the transformation protocol.
InterLab – transformation of plasmids to competent cells:
The plasmids listed on the protocol, was transformed into competent cells (DH5α) after the following protocol:
- Thaw the competent cells on ice (10 min), and pre-chill the eppendorf tubes.
- Resuspend the DNA in the wells (provided by iGEM HQ) with dH2O (10 μL).
- Add competent cells (50 μL) to the eppendorf tubes.
- Add resuspended DNA (1 μL) to the Eppendorf tubes.
- Incubate on ice for 25 min
- Heat shock the cells for 45 s at 42℃ in water bath
- Incubate on ice for 5 min.
- Add LB-medium (950μL) to the tubes
- Incubate for 1h at 37℃ with shacker
- Pipette each sample (100 μL) to agar plate with CM
- Centrifuge the samples for 3 min at 6800g, discard supernatant (800 μL) and resuspend the pellet with the remaining supernatant
- Pipette each sample (100 μL) to agar plate with CM
- Incubate overnight at 37℃.
Results:
Separation of linear DNA from circular DNA:
Figure 1 shows the image of the gel where the linearized DNA was separated from the circular DNA. The linearized DNA is approximately 2 kb. The linearized DNA fragment was then cut out from the gel and stored in eppendorf tube.
Note! Due to UV-light exposure, the DNA may mutate. In this case, this may affect the later steps of our project. The worse scenario, mutation of anti-luxS. Hence our CSRPRi system may not recognize luxS in the bacteria. Biofilm production will not be inhibited…
Determine the DNA concentration and purity:
Table 1 shows the results of the linear pgRNA (2) from PCR (probably with anti-luxS gene).
Table 1: The concentration and the relative purity of the pgRNA (2) from PCR.Concentration [ng/μL] 260 nm/280 nm 260 nm/230 nm 52.8 1.90 0.27
From the 260/230 ratio, the sample has a relatively a small amount of nucleic acids. Probably, it is contaminated by the agarose from the gel electrophoresis. On the other hand, the 260/280 ratio is ok, indicating that the sample contains a relatively larger amount of RNA than DNA. InterLab – transformation of plasmids to competent cells:
No visible colonies were detected on agar plates, except the positive and negative control cells. -
Jul3
Inoculation of successful transformed competent cells and InterLab study
Goal:
- Inoculate colonies of successful transformed competent cells
- InterLab study - transformation of plasmids to competent cells
Procedure:
InterLab – transformation of plasmids to competent cells:
No visible cell colonies were formed on the agar plates that were incubated on day 9 - 02. Junly. 2018. Only the positive and negative control cells formed colonies.
Therefore, the remaining plasmids (6 μL) were transformed to the competent cells and plated on agar based on the same protocol from day 2. Jul. 2018. During the incubation at 37℃ with shaker, the incubation time was extended to 2 h. The cell cultures were centrifuged, and 700 μL supernatant was discarded, and the pellets were resuspended with the remaining supernatant. The cell cultures were then plated on agar plated with CM, and incubated overnight at 37℃.
Inoculation of successful transformed competent cells:
Colonies of successful transformed competent cells with pgRNA (probably containing anti-luxS) were inoculated from the agar plates (from day 9 – 02. July. 2018) to LB-medium with AMP. The cell cultures were incubated with shaker overnight at 37℃.
Results: -
Jul4
Verification of successful inserted anti-luxS in pgRNA
Goal:
- InterLab - transformation of plasmids into competent cells
- Verification of succsesful insertion of anti-luxS in pgRNA(2)
Procedure:
InterLab – Transformation of plasmids to competent cells
There has been a mistake of numbering the plates with plasmids provided by iGEM HQ. Therefore, we did not get any cell colonies from the previous two transformations…
The plasmids (1.5 μL) from the right wells were transformed to competent cells by following the transformation protocol from day – 02. July. 2018, after resuspension of the plasmids in the wells.
Cell density:
The cell cultures with pgRNA(2) (probably with anti-luxS), inoculated from day 10 – 04. July. 2018, were diluted 10 times by following the same dilution procedure from day 6 – 27. June. 2018. The cells were incubated with shaker for 1h before measuring at OD 600.
Plasmid isolation:
The plasmids from the two cell cultures were isolated after the same mini-prep protocol from day 3 – 22. June. 2018. The concentration and the purity of the isolated plasmids were measured by Nanodrop.
Restriction digest and gel elecrophoresis:
Insertion of anti-luxS gene was verified after the protocol of restriction digest and gel electrophoresis (see the protocols from day 3 – 22. June. 2018). The restriction enzyme PstI was chosen, and the expected length of the plasmid fragments are 490 bp and 2094 bp.
Note! PstI has a cut site at the anti-luxS gene in the plasmid.
Bacteria glycerol stock:
Two samples of the diluted cell cultures (made at this morning), were stored in 50% glycerol solution at -80℃ (the same green box with the other successful transformed cells with pgRNA (without anti-luxS) or cells with pdCas9 plasmids).
Results:
InterLab - Transformation:
Colonies were formed on agar plates with CM.
Cell density:
Table 1: Absorbance of the cell cultures with pgRNA(2) after 1 h incubation at 37℃ with shaker.Culture OD 600 pR2 (1) 0.954 pR2 (2) 0.998 Concentration (ng/μL) 260 nm/280 nm 260 nm/230 nm pR2(1) 37.2 2.06 4.29 pR2(2) 123.3 1.77 1.01 -
Jul5
Double transformation and InterLab study - Inoculation
Goal:
- Transform both pdCas9 and pgRNA with anti-luxS into competent cells
- InterLab study - inoculate colonies in LB-medium
Procedure:
Double transformation of pdCas9 and pgRNA with anti-luxS:
Both pdCas9(2) and pgRNA(2) with anti-luxS (isolated from day 11 – 05. July. 2018) were simultaneously transformed into competent cells (DH5α). The amount of added pdCas9(2) (5 μL) and pgRNA(2) with anti-luxS was 5 µL per/plasmid, and it was added to the same tube containing competent cells. The cells were plated on agar with both AMP and CM. A couple of steps were added at the end, and the purpose was to increase the cell concentration plated on agar, and probably increase the possibility of colony formation. The cell culture was therefore centrifuged for 3 minutes at 6800g, and the supernatant discarded. The pellet was then resuspended and cells were plated.
InterLab – Inoculation of colonies
A colony from each agar plate was inoculated in LB-medium (5 mL) with CM (5 μL). The cell cultures were incubated overnight at 37℃ with shaker.
Results:
-
Jul6
Inoculation of successful double transformed cells, interLab study - Cell measurement
Goal:
- Inoculate successful double transformed cells (probably carrying pdCas9 and pgRNA with anti-luxS)
- InterLab study - measure absorbance and the fluorescence of each cell cultures
Procedure:
Inoculation of successful double transformed cells
- A colony from each agar plates with AMP and CM (made from day 13 – 05. July 2018) was picked and inoculated in LB medium (20 mL) with AMP (25 μL) and CM (25 μL).
- The cell cultures were incubated at 37℃ with shaker.
InterLab – Cell measurement
We were not able to measure the cell cultures today, since the TECAN device was under reparation.
Each cell cultures were stored with 50% glycerol (see day 7 – 28. June. 2018) at -80℃.
Results:
-
Jul7
Verification of pdCas9 and pgRNA with anti-luxS after double tranformation
Goal:
Verify that both pdCas9 and pgRNA with anti-luxS are tranformed into DH5α cells
Procedure:
Dilution of cell culture:
Each cell cultures, inoculated and incubated from day 13 – 07. July. 2018, were diluted (1mL) with LB medium with antibiotics until the OD 600 reached 1.9.
Plasmid verification:
Plasmid isolation:
The plasmids were isolated from each cell cultures after following the mini-prep plasmid protocol from day 3 – 22. June. 2018. The concentration and the purity of the samples were determined by Nanodrop.
Restriction digest and gel electrophoresis:
The plasmids in each sample were digested with restriction enzymes BamHI-HF and PstI with the following ingredients and amounts:
- 7.1 μL Plasmids
- 0.5 μL PstI
- 0.5 μL BamHI-HF
- 2 μL NEBuffer 1.1
- 10.4 μL ddH2O
Note! NEBbuffer 1.1 was chosen instead of Cut smart since the activity of PstI in Cut smart was 50%.
The activity of the enzymes in NEBbuffer 1.1:
BamHI-HF: 100%
PstI:75%
After the plasmids have been degraded by restriction enzymes, the fragments were separated by gel electrophoresis.
Results:
Plasmid verification:
Plasmid isolation:
Sample Concentration [ng/μL] 260 nm/280 nm 260 nm/230 nm 1 219.9 2.01 1.82 2 35.3 2.03 3.86
The bands on the gel, corresponded with the expected fragments (6705bp, 2094bp, 465bp, 25bp) from digestion of the plasmids by PstI and BamHI-HF. Therefore, we concluded that both of pdCas9 and pgRNA with anti-luxS have successfully been transformed into DH5α cells.
Week28Week 28
-
Jul9
No lab
-
Jul10
No lab
-
Jul11
No lab
-
Jul12
InterLab Study: Revive bacteria glycerol stock
Goal : InterLab Study: Revive bacteria glycerol stock
Procedure: The frozen bacteria glycerol stock made from 6th of July were thawed on ice. Each culture were inoculated in LB medium with CM (5 mL), and incubated over night at 37°C. -
Jul13
InterLab Study: CFU/mL/OD calculations
Goal:
Count colony forming units on plates spread the day before.
Procedure:
Counted CFU on all 36 plates incubated 13. July.
Results:
The colonies on agar plates, from yesterday’s incubation, were counted and registered:CFU Dilution 3 Dilution 4 Dilution 5 1.1 195 6 1 1.2 185 2 0 1.3 203 15 3 2.1 222 19 2 2.2 38 22 1 2.4? 52 15 1 3.1 113 56 3 3.2 112 12 2 3.3 127 25 2 4.1 79 4 0 4.2 75 10 1 4.3 107 3 1 -
Jul14
InterLab – CFU/mL/OD calculation
Goal:
Counting colonies on each agar plate, and calculate CFU/mL in starting samples with an OD600 = 0.1.
Procedure:
The colonies on the agar plates, prepared from yesterday’s incubation, were counted and registered.
Results:
Table 1: The average values of counted colonies from two cultures of positive and negative controls with different final dilution factor (dilution 1 = 8x104, dilution 2 = 8x105, dilution 3 = 8x106).Positive control Negative control Culture 1, dilution 1 194.3 117.3 Culture 1, dilution 2 7.7 31.0 Culture 1, dilution 3 1.3 2.3 Culture 2, dilution 1 104.0 87.0 Culture 2, dilution 2 18.7 5.7 Culture 2, dilution 3 1.3 0.7
Week29Week 29
-
Jul16
Transformation of the RFP-biobrick (test)
Goal:
Transform the RFP-biobrick (BBa_J04450) into competent DH5α-cells.
Procedure :
Before doing the transformation the biobrick was resuspended with 10 µL dH2O in the plate (position 23O, plate 7). The cells with and without the biobrick (negative control) were both incubated and plated after the transformation. The negative control was plated on LA-petri dishes while the transformed cells was plated on LA-petri dishes with CM.
Results:
There was only one colony on each plate -
Jul17
Colony picking biobrick (test) and transformation
Goal :
1. Get colonies of the transformed DH5α (biobrick) 2. Get colonies on the negative control plate
Procedure:
1. Due to the lack of colonies on the negative control plates, new plates was streaked.
2. New LA-plates without antibiotics were made.
3. Colonypicking the two colonies from the plates with the transformed bacteria in to liquid medium.
4. The transformation of bacteria with the biobrick plasmid was redone on four plates because of the lack of growth on the plates (see 16.07.18).
Results:
There were more colonies on the four new plates, and they were light red as well (About 20 colonies). The new negative control plates had colonies as well.
-
Jul18
RFP biobrick fluorescens measurement (test)
Goal:
1. To get a descriptive curve for the rise in fluorescens (transformed DH5α)
2. Find out how often the measurements need to be done.
Procedure:
The second batch of plates from transformation and the negative control:
1. Colonypicking and exchange to liquid medium
Measurements of the first batch (Tecan):
1. Measured the OD of the blank (LB and CM), and measured the OD of the two cultures.
2. For the next measurements we diluted the cultures by 1:100 in separate tubes.
3. Incubation of the tubes
4. The first measurement was done in the Tecan, and repeated for every 30 minutes and then 1 hour (because of minor changes in values)
5. The measurements was set overnight as well using the following script: FluorescenceLong. The data was set to 588 nm absorbance, 584 nm excitation, 607 nm emission, 37°C, 40 gain, 150 kinetic cycles, 300s shaking (orbital 3 mm amplitude).
Results:
The second batch from transformation has turned red. From the measurements of the test batch we have an idea of the increase in fluorescence intensity and the change in absorbance over time. This can be used to determine the timing of the second batch with the negative control as well.
-
Jul19
Biobrick: Preparations, Fluoresence microscopy
Goal:
Prepare for measurements tomorrow.
Learn about fluorescence microscopy
Procedure:
Preparations:
Made LA-petri dishes with CM. Diluted cultures of the biobrick Bba_J04450 and negative control and incubated them at 37°C overnight.
Demonstration and training in fluorescence microscopy:
Astrid Bjørkøy showed us how to use the fluorescence microscope, and we tried it out by taking photos of cultures of the Bba_J04450 biobrick. She also told us how to count cells by adjusting a photo's threshold and calculate based on image size.
Results:
The biobrick Bba_J004450 was very bright. We used excitation 561 nm and emission ca 625-680 nm as the biobrick was too bright at emission 607 nm. Consider using another laser further away from excitation point (584 nm) for the real photos of the biobrick, and the improved biobrick.
-
Jul20
Biobrick: Red Fluorescent Protein measurement (FAILED)
Goal:
Measure the expression of the Bba_J04450 biobrick in transformed dH5α cells. This is done by measuring fluorescence.
Procedure:
1. Incubated dH5α, J04450 transformed cells were dilluted 1:100 with LB
2. 200 µL, 5 replicates of LB, LB with Chloramphenicol and 5 dH5α dillutions made from different batches were applied to a 96 well plate
3. Tecan plate reader was used to measure absorbance at 588 nm and fluorescence at excitation 584 nm and emission 607 nm with the following parameters:
- Temperature: 37,0°C, varying from 36,5°C to 37,5°C
- Kinetic cycles: 750
- Gain: 40
- Z position: 18055 µM
- Shaking: 300 s
- Orbital shaking amplitude: 3 mm
Results:
The wells dried out, presumably due to us choosing not to use a lid on the plate, and the measurements were therefore aborted by the machine.
Week30Week 30
-
Jul23
Make super competent cells of the TG1
Goal:
Make supercompetent cells of the E.coli - TG1 strain
Procedure:
DAY 1:
- Made Psi media, transformation buffer 1 and transformation buffer 2.
- Made an E.coli TG1 culture in a small flask with 10 mL Psi- medium. Inoculated culture at the end of the day and left the flask for incubating while shaking and at 37°C overnight.
Results:
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Jul24
Make supercompetent cells of the TG1, day 2
DAY 2:
This was done from an overnight culture of TG1-cells, see protocol. Results:
There was no growth on the plates with CM and AMP after the transformation (25. July. 2018), so the conclusion was that the cells were not supercompetent. The protocol was then updated and optimized for another trial. -
Jul25
Miniprep and transformation of TG1-cells
Goal:
1. Transformation of TG1-cells with DNA that includes pdCas9 and pgRNA with antiluxS-gene.
2. Make LA-plates with both CM and AMP antibiotics
Procedure:
pgRNA with antiluxS and pdCas9 has already been transformed into E.coli DH5α. The plasmids were isolated and extracted by the miniprep protocol. Transformation of the TG1-cells with the extracted plasmids was done, and the bacteria were incubated.
Results: No bacterial growth has been observed. -
Jul26
Preparations for biofilm measurements
Goal:
1. Make media for the biofilm measurements (LB and M63B1)
2. Prepare TG1, TG2 buffers and Psi medium for supercompetent cells.
Procedure:
1. Made three versions of the two media with pH-values at 4.5, 7.2 and 9.5. The media was then autoclaved and sugar will be added before use of the media.
2. Made TG1, TG2 buffers and Psi medium.
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Jul27
Make supercompetent cells of TG1, second attempt
Goal:
1. Make supercompetent cells of TG1 by following an improved protocol.
Week31Week 31
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Jul30
Transformation of TG1-cells and flow cytometry test
Goal:
1. Transformation of TG1-cells with DNA that includes pdCas9 and pgRNA with antiluxS-gene. 2. Learn and conduct a flow cytometry test of the E.Coli DH5a that contains the Bba_J04450-biobrick and a negative control. The goal was also to optimize a protocol for the biobrick measurements.
Procedure:
pgRNA with antiluxS and pdCas9 has already been transformed into E.coli DH5α. The plasmids were isolated and extracted by the miniprep protocol, and the cells transformed and incubated. For the transformation, 5 µL of the miniprepped plasmids were used instead of 2 µL.
2.
Results: Noticeable bacterial growth was observed on all plates, with no apparent contamination. -
Jul31
TG1 colonypicking
Goal:
1. Make cultures out of plates made on the 30th of July, prepare for test digest.
2. Make DH5α cultures for later use in biobrick measurements.
Procedure:
Colonypicking into five beakers with 25 mL LB, 25uL Amp and 25 µL CM. Incubation at 37°C, 225 RPM overnight. New LB-media was made. -
Aug1
Miniprep, Nanodrop, Test digest
-
Aug2
Verification of transformation of TG1 and preparation of media for biofilm measurements
Goal:
1. Confirm successful transformation of TG1 with pgRNA and PdCas9 with anti-luxS.
2. Prepare media for biofilm measurements
3. Inoculate TG1 in newly made media
Procedure:
Verification of the plasmids was done by miniprep, nanodrop, test digest and gel electrophoresis. Different amounts of glucose was added to the respective media.
-
Aug3
Measure OD + change medium
Goal:
Week32Week 32
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Aug6
E.Coli TG1 biofilm measurement
The two E.Coli TG1 96-well plates made yesterday (06.08.2018) underwent the Crystal Violet Assay protocol (see Protocols), and the biofilm produced was measured by measuring absorbance at 590 nm with Tecan Infinite 200 Pro plate reader. -
Aug7
Incubate DH5α and TG1 in chosen media for biofilm measurements.
Goal:
- Incubate DH5α and TG1 (with pgRNA and pdCas) in selected media (LB and M63B1, pH 7.2, 0.4%/0.8% Glucose) - Make Tetracycline stock solution (5.0 mg/ml)
Procedure:
Incubated the frozen DH5α-stocks in LB (with CM and AMP) for a few hours. Inoculated into the chosen media in eppendorf tubes. Incubated TG1 into the chosen media in eppendorf tubes overnight. Made 5mg/mL Tetracyclin-solution (inducer). Note: light sensitive.
Protocol:
- Tetracyclin-HCl(powder): 54 mg
- Ethanol: 7 mL
- dH2O: 3 mL
After being incubated for some time tetracyclin solution was added to the eppendorf tubes do induce the transcription of Cas9, and the culture tubes were further incubated. -
Aug8
Incubation of cell cultures for biofilm assay and preparation of M63B1 medium
Goal :
1. Incubate cell cultures on 96-well plates for biofilm assay
2. Make M63B1 medium
Procedure :
Preparation for biofilm assay:
1. Overnight cultures (with TET) was diluted until OD600 = 0.1
2. Each diluted culture (100μL) was added on 96-well plate and incubated for 4 h at 37℃
3. After 4 h incubation, the non-adhered cells were removed by washing the wells with physiological saline and the supernatant was discarded.
4. New medium (100 μL) was added to each well and the plate was incubated for 24 h at 37℃.
Note! The media that were added to the wells right before 24 h incubation did not contain TET
M63B1 medium:
M63B1 medium was made after following the protocol from 26. July. 2018
Results: -
Aug9
Preparation of media with TET, and incubation of cell cultures on 96-well plate for biofilm assay
Goal :
1. Preparation of media with tetracycline (2 μM)
2. Incubate cell cultures with and without tetracycline (TET) on a 96-well plate for the 24 h biofilm assay.
3. Measure the absorbance of CV- assay with and without TET, made from yesterdays’ incubation.
4. Prepare TG1 and dH5α cell cultures in growth medium (LB or M631B) with or without TET (2 μM).
Procedure :
Preparation of media with TET (2 μM):
1. Tetracycline (TET) (50 μL, 0.5 mg/mL) was added to a 25mL LB medium with 0.4% glucose, AMP and CM. The same amount of tetracycline was added to LB medium with 0.8% glucose, AMP and CM
2. For the final M63B1 medium (0.5 L) with MgSO4*7H2O, AMP and CM and 0.4% or 0.8% glucose, TET (1mL, 0.5 mg/mL) was added.
Preparation of 96-wells plate for 24h biofilm assay:
1. Overnight cultures were diluted with or without TET (2 μM) containing media (LB or M63B1) until a target OD600 = 0.1.
2. Each diluted culture (100 μL) were incubated on a 96-wells plate for 20 h at 37℃.
Absorbance measurement of CV-assay:
1. The supernatant was discarded from a 24h incubation of cell cultures on a 96-wells plate (prepared from 08. August. 2018) and rinsed with PS (100μL).
2. The biofilm was fixed by adding methanol (100 μL, 99%) and waited for 15min. The supernatant was discarded, and the plate was airdried.
3. CV-solution (100 μL, 0.1%) was added to each well and coloured the biofilm for 20 min. The excess CV was washed away with dH2O 4. Acetic acid (150 μL, 33%) was added to the each well.
5. The absorbance was measured at Abs 590 nm
Results: -
Aug10
Preparation of overnight cultures for biofilm assay, and storage of TG1 cells with pgRNA and pdCas9
Goal :
1. Prepare overnight cultures in LB (0.4% or 0.8% glucose, with AMP and CM) or M63B1 (0.4% or 0.8% glucose, with AMP and CM) with or without TET.
2. Wash the 96-well plate (after 20 h adhesion - prepared from 09.08.2018) with physiological saline, add new media and incubate the plate.
3. Make bacteria glycerol stocks of TG1 cells with pgRNA and pdCas9.
Procedure :
Preparation of overnight culture:
TG1 and dH5α were incubated in eppendorf tubes with different media (LB or M63B1 with glucose (0.4% or 0.8%), AMP and CM) with or without TET (2 μM) for overnight at 37℃ with shaking.
Preparation for biofilm assay:
1. After 20 h adhesion (plate prepared from 09. August. 2018), the non-adhered cells were removed by washing the wells with physiological saline (PS) and the supernatant was discarded.
2. New medium (100 μL) was added to each well and the plate was incubated for 24 h at 37℃.
Bacteria glycerol stock preparation:
TG1 cells with pgRNA and pdCas9 (500 μL) was stored with glycerol (500 μL, 50%) at -80℃.
Results : -
Aug11
Preparation of overnight cultures for biofilm assay
Goal :
Prepare 96-well for cell adhesion and CV-assay
Procedure :
The OD of some of the overnight cultures was not optimal for continuing the procedure of CV assay. New cell cultures were made.
96-well plates for 24 h, 48 h and 72 h incubation were made. However, since the cell cultures could not be diluted to OD = 0.1, the results of the CV assay will not be comparable. -
Aug12
Incubation of cell cultures for biofilm assay
Goal :
Preparation for cell adhesion on 96-well plates for 24 h, 48 h and 72 h incubation.
Procedure :
1. The overnight cultures were resuspended, before dilution until a target OD = 0.1.
2. The diluted cell cultures were resuspended and added on 96-well plates and incubated for 4 h at 37℃.
3. After 4 h incubation, the wells were washed with physiological saline (100 μL) and the supernatant was discarded.
4. New media (100 μL) were added to the plates, and the plates were incubated at 37℃.
Results :
Week33Week 33
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Aug13
Biofilm measurements after 24hrs
Procedure:
Followed the crystal violet assay:
Changed medium in the plate for 48 and 72 hrs.
Results:
Results did not show any clear trend. Excel sheet attached.
Wells with only medium, not cells, showed too high absorbance measurements, probably because of contamination of the mediums. Decided to autoclave all the mediums again. Will take measurements at 48 hrs, but not at 72 hrs. -
Aug14
Biofilm measurement after 48 hrs
Goal:
- Measure biofilm after 48 hrs.
- Prepare RRVT-Biobrick and biobrick backbone
- Ligate and transform RRvT- biobrick and biobrick backbone into DH5alpha cells.
1. Performed the Crystal Violet Assay procedure for the plate designated for 48hrs and for the plate that initially was designated for 72 hrs measurement. -
Aug15
Biobrick ligation and transformation
Goal:
- Ligate plasmid backbone and RRvT-plasmid and transform into cells.
- Due to the lack of colonies from yesterdays transformation the ligation of plasmid backbone and RRvT-plasmid and transformation into E.Coli Dh5α cells was redone.
- Preparations of plasmid backbone and RRvT-biobrick:
Made enzyme master mix for plasmid backbone by adding 5μL NEB buffer 2, 0.5 μL EcoRI-HF, 0.5 μL PstI, 0.5 μL BSA and 18.5 μL dH2O to an Eppendorf tube.
Made enzyme master mix for RRvT-biobrick by adding 5μL NEB buffer 2, 0.5μL EcoRI-HF, 0.5 μL PstI and 19 μL dH2O to an Eppendorf tube. Incubated mix for 20 min at 50℃.
Digested Plasmid backbone by adding 4 μL linearized backbone (25 ng/μL for 100 ng) and 4 μL of enzyme master mix for plasmid backbone.
Digested RRvT-biobrick by adding 4 μL of the biobrick and 4 μL of the enzyme master mix for RRvT-biobrick. Digested both reactions at 37℃ for 90 min and did heat kill at 80℃ for 20 min.
- Ligation:
Added 2 μL of digested plasmid backbone.
Added 2 μL of digested RRvT-biobrick.
Added 1 μL T4 DNA ligase buffer.
Added 0.5 μL of T4 DNA ligase.
Added water to 10 μL.
Ligated at 16℃ for30min. Did heat kill at 80℃ for 20 min.
Transformed E.Coli Dh5α cells with 1-2 μL of product following the protocol for transformation.
Inoculated .. plates and let them incubate at 37℃ to the next day.
Aug16Preparation for biobrick (RRvT) measurement and biofilm assay
Goal:
- Inoculate successful transformed cells into LB medium with CM.
- Revive TG1 and DH5α cells in LB medium with AMP, CM and 0% glucose.
Preparation for biobrick (RRvT) measurement:
Successful transformed cell colonies from yesterday's incubation were inoculated into LB - medium with CM and incubated at 37°C with shaking.
Preparation for cell cultures for biofilm assay:
TG1 and DH5α cells with pgRNA and pdCas9 were revived in LB medium with AMP, CM and 0% glucose. The cell cultures were incubated at 37°C with shaking.
Aug17Preparation for biofilm assay
Goal:
- Dilute the overnight cultures for biofilm assay.
- Do Crystal Violet assay after 3 h, 5 h and 8 h of incubation of a 96-well plate.
Procedure:The media for biofilm assay were made by adding the following ingredients:
- LB 0.4% glucose, TET: 10 mL LB, 10µL AMP, 10µL CM, 0.2 mL 20% Glucose, 19.7µL 0.5mg/mL TET
- LB 0.8% glucose, TET: 10 mL LB, 10µL AMP, 10µL CM, 0.4 mL 20% Glucose, 20µL 0.5mg/mL TET
- LB 0.4% glucose: 10 mL LB, 10µL AMP, 10µL CM, 0.2 mL 20% Glucose
- LB 0.8% glucose: 10 mL LB, 10µL AMP, 10µL CM, 0.4 mL 20% Glucose
- M63B1 0.4% glucose, TET: 10 mL M63B1, 10µL AMP, 10µL CM, 10 µL 1M MgSO4*7H2O, 0.2 mL 20% Glucose, 19.7 µL TET
- M63B1 0.8% glucose, TET: 10 mL M63B1, 10µL AMP, 10µL CM, 10 µL 1M MgSO4*7H2O, 0.4 mL 20% Glucose, 20 µL TET
- M63B1 0.4% glucose: 10 mL M63B1, 10µL AMP, 10µL CM, 10 µL 1M MgSO4*7H2O, 0.2 mL 20% Glucose
- M63B1 0.8% glucose: 10 mL M63B1, 10µL AMP, 10µL CM, 10 µL 1M MgSO4*7H2O, 0.4 mL 20% Glucose
Biofilm assay:
- Pipette 3-4 mL overnight cultures to sterile tubes (total 16 tubes).
- Centrifuge the cultures for 10 min at 2000 rpm at 9°C.
- Remove the supernatant.
- Add 3-4 mL media (LB/ M63B1, with 0.4%/ 0.8% glucose, with/ without TET) to 2 tubes each.
- Resuspend/ vortex the cultures, and measure OD 600.
- Dilute the cultures until target OD 600 = 0.1 and store the cells on ice until they are added to the wells.
- Resuspend/ vortex the cultures, add 100 µL culture to each well on the plate.
- Seal the top of the plate with parafilm, and incubate the plate at 37°C.
- Do CV assay after 3 h, 5 h, 8 h, 24 h and 48 h incubation.
Week34Week 34
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Aug20
Preparation for 3h, 5h, 8h, 24h, 30h CV and Bactiter-Glo Assay.
Goal:Redo CV assay from 17th August to check the validity of previous results.
Perform Bactiter-Glo Assay parallell to CV Assay (3h, 5h, 8h, 24h, 30h) to examine the amount of living cells in biofilm.
Procedure:Crystal Violet Assay: Same procedure as from 17.08.2018.
Bactiter-Glo Assay
Results:The results and measurement settings can be found in the attached files.
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Aug21
No lab
No lab. -
Aug22
No lab
No lab. -
Aug23
No lab
No lab. -
Aug24
No lab
No lab.
Week35Week 35
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Aug27
No lab
No lab. -
Aug28
No lab
No lab. -
Aug29
No lab
No lab. -
Aug30
No lab
No lab. -
Aug31
No lab
No lab.
Week36Week 36
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Sept3
No lab
No lab. -
Sept4
No lab
No lab. -
Sept5
Introduction of site directed mutagenesis on pdCas9 and make medium for V. natrigens
Goal:Make LB medium and 10x v2 salts for Vibrio natrigens
Amplify and introduce site directed mutagenesis in pdCas9
Procedure:LB - medium
10x v2 salts:
Make the salt solutions after the following recipe:- 11.935 g NaCl (204 mM)
- 0.3134 g KCl (4.2 mM)
- 4.710 g MgCl2*6H2O (23.14 mM)
- 1 L ddH2O
Site directed mutagenesis:
Forward and reverse primers for site directed mutagenesis were designed and ordered from Sigma Aldrich. Introduce site directed mutagenesis in pgCas9 via PCR after following the protocol from 29. June. 2018. The first PCR was not successful. The primer annealing temperature was changed, and the elongation time as well. -
Sept6
Introduce site directed mutagenesis in pdCas9 and amplify RRvT and pSB1C3e
Goal: Introduce site directed mutagenesis in pdCas9 Amplify RRvT and pSB1C3 via PCR
Procedure: Site directed mutagenesis in dCas9: pdCas9 was amplified via gradient PCR, where the annealing temperatures were 57.3 ℃, 59.3 ℃, 61.1 ℃ and 64.1℃ with an elongation time for 5 min. The samples were stored in the fridge after the PCR was finished. Amplification of RRvT and pSB1C3: RRvT and pSB1C3 fragments were amplified by running the samples (6 µL FW primer, 6 µL REV primer, 1 µL template, 12.5 µL Takara Hi-Fi PCR premix) on PCR with the following settings: annealing temperature 37 ℃ for 10 s, elongation temperature 72 ℃ for 1 min. The samples were stored in the fridge after the PCR was finished.
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Sept7
Gel purification of PCR products (pdCas9, RRvT and pSB1C3), incubate V. natriegens
Goal:Separate the PCR products of RRvT and pSB1C3 on gel, and miniprep the desired fragments on the gel. Incubate Vibrio natreigens (V. natriegens). Do another round of site directed mutagenesis on pdCas9 via PCR.
Procedure: Gel purification of RRvT and pSB1C3 on gel:5 μL loading dye was added to the PCR products (25.5 μL). The PCR products were separated on Gel green (90 V, 40 min). The desired fragments were cut out from the gel and collected in eppendorf tubes Gel digestion and DNA isolation of RRvT and fragment of pSB1C3: The PCR products with the desired length on the gel was isolated by following after the same protocol from 02.07.2018.
Inoculation and incubation of V. natriegens:Sample of V. natriegens sent by the iGEM team from Marburg, was inoculated and incubated by following after the protocol provided by the team.
Introduce site directed mutagenesis in pdCas9:PCR mix with pdCas9 was prepared after following the same protocol from 29.06.2018. Two samples were set on two different programs: 3 step PCR: DNA denaturation temperature at 98℃, primer annealing temperature at 55 ℃ for 10 s, elongation temperature at 72 ℃ for 7 min. 2 step PCR: same conditions as 3 step PCR without the primer annealing step.
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Sept8
Purification of RRvT, separation of PCR product of pdCas9 and measurement of growth curve of V. natriegens (failed)
Goal:- Measure the growth curve of V. natrigens
- Gel purification of RRvT
- Separte the PCR products of pdCas9 on gel
Growth curve of V. natrigens:
The experiment failed due to dilution in the flasks and not in the cuvettes
Gel purification of RRvT:
The PCR product of RRvT was purified on gel, and the DNA was isolated after following the same protocol from 02.07.2018.
Gel separation of pdCas9 PCR product:
The PCR products of pdCas9 were separated on both gel red and gel green for imaging and for isolation of the desired fragments by following the same protocol from 02.07.2018.
See results page for results
. -
Sept9
Amplification of RRvT and introduce SDM in pdCas9
Goal:
Amplify RRvT and introduce SDM in pdCas9 via PCR
Procedure:
RRvT and introduction of pdCas9 was necessary since the concentration of the products isolated from gel on 08.09.2018 were too low.
Amplification of RRvT:
RRvT was amplified via PCR with an annealing temperature 55 ℃ for 10 s and elongation temperature at 72 ℃ for 1 min.
Introduce SDM in pdCas9:
Site directed mutagenesis was introduced via PCR with an annealing temperature at 55 ℃ for 10 s and elongation temperature 72 ℃ for 7 min.
The products were stored in the fridge.
Week37Week 37
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Sept10
Gibson assembly of RRvT and backbon and transformation of SDM pdCas9 and assembled RRvT into competent cells
Goal:
Gel purification of PCR products Gel digestion and isolation of desired DNA fragments Assemble RRvT and pSB1C3 via Gibson assembly Transform pdCas9 and the assembled RRvT into competent cells
Procedure:Gel purification: The PCR products were separated on gel green RRvT: 25.5 µL DNA, 5.05 µL loading dye pdCas9: 25 µL DNA, 5 µL loading dye
Gel digestion and DNA isolation:
The desired fragments (RRvT: approx. 2000 bp, pdCas9: approx. 6000 – 7000 bp) were cut out from the gel. The gel was digested by following after the protocol from 02.07.18.
Transformation of SDM pdCas9 into competent cells:
6 µL DNA was transformed into competent cells by following after the protocol from 25.06.18.
Gibson assembly of RRvT and pSB1C3:
The fragments were assembled together by following the protocol provided from the kit 2 µL RRvT, 8 µL pSB1C3 (0.03 – 0.2 pmol fragments), 10 µL assembly master mix was incubated in a thermocycler at 50C for 15 min. The sample was stored on ice for transformation.
Transformation of assembled RRvT and pSB1C3 into competent cells:
2 µL Gibson assembly product was transformed into competent cells by following after the protocol from 25.06.2018.
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Sept11
PCR colony screening, isolation and verify successful SDM on pdCas9
Goal:
- PCR colony screening of RRvT gene
- Isolate pdCas9 from cell cultures
- Verify successful SDM on pdCas9 by restriction digest the plasmid
Procedure:
PCR colony screening:
None of the colonies were red/ pink coloured like the colonies with RFP.
PCR colony screening was done to test whether assembly of RRvT and pSB1C3 fragments was successful
PCR mix was prepared after the following protocol: 5 µL Takara Hi-Fi PCR premix, 1 µL ddH2O, 6 µL RRvT FWD primer, 6 µL RRvT REV primer 8 different colonies were chosen and transferred to a new agar plate with CM, before the colony was transferred to a PCR tube with PCR mix. The samples ran on a PCR machine with the same settings from day 28 – 06. 09. 2018.
Plasmid isolation:
pdCas9 with SDM was isolated from three cell replicates by following the protocol from day 3 – 22. 06. 2018.
Restriction digest:
Introduction of SDM in pdCas9 was verified by adding restriction enzyme which originally recognize and cut at a specific site in the plasmid. EcoRI has two restriction sites in pdCas9 before any mutations.
Mix 2 µL DNA (pdCas9 SDM), 2 µL Cut smart buffer, 15.5 µL ddH2O, 0.5 µL EcoRI Hi-Fi Spin down the solutions Incubate overnight at 37 ℃
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Sept12
Gel separation of digested pdCas9 (SDM) and products from PCR colony screening of RRvT, amplification of pdCas9 fragments for Gibson assembly
Goal:
- Separate the DNA fragments of pdCas9 SDM after restriction digest
- Visualize the products from PCR colony screening on gel
- Amplify the different fragments of pdCas9 for Gibson assembly
- Inoculate colonies with RRvT in LB medium with CM
Procedure:
Gel electrophoresis:
Both pdCas9 fragments obtained from restriction digest, and the products from PCR colony screening of RRvT were separated and visualized on gel by mixing the DNA with loading dye
RRvT: 3 µL DNA, 2 µL dye, 7 µL ddH2O
pdCas9: add 4 µL loading dye to each samples
The DNA fragments were separated on gel red.
Preparation for Gibson assembly of pdCas9:
Segments for Gibson assembly were obtained by amplify the desired fragments with designed primer pairs via PCR.
Primers for Gibson assembly (ordered from Sigma Aldrich), were resuspended with ddH2O and diluted to 1 µ Dilute pdCas9 SDM – 2 µL DNA (PC1), 8 µL ddH2O (to obtain <26 ng/µL) PCR samples (1 µL diluted template (pdCas9 SDM, <26 ng/μL), 6 µL FWD primer, 6 µL REV primer, 12.5 µL Takara HI-FI PCR premix) were incubated in PCR machine with the same settings from day 29 – 07. 09. 2018.
Inoculate cell colonies with RRvT:
Colonies with RRvT was inoculated in LB medium with CM from the agar plate, and the cell cultures were incubated overnight at 37 ℃ with shaking.
Cells were inoculated from the following agar plate. Cells with RFP were revived in LB medium with CM.
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Sept13
Gel purification, isolation and Gibson assemble the PCR products of pdCas9 fragments, transformation of Gibson assembled product, fluorescence test round of RRvT
Goal:
- Gel purification of the PCR product of pdCas9 fragments
- Gel digestion and isolation of the pdCas9 fragments
- Gibson assemble the pdCas9 fragments
- Transformation of Gibson assembled product into competent cells
- Test round of RRvT by measuring the fluorescence
Procedure:
Gel purification of pdCas9 fragments:
25.5 µL PCR products were mixed with 5.05 µL loading dye, and separated on gel by following after the same procedure from 22.06.2018.
Gel digest and DNA isolation:
After gel electrophoresis, the desired pdCas9 fragments were cut out from the gel. The gel was digested and the DNA fragments were isolated by conducting the same protocol from 02.07.2018.
Gibson assembly of the pdCas9 fragments:
The pdCas9 fragments, isolated from the gel, were assembled after the following protocol
Mix 0.60 µL G1 fragment, 3.49 µL G2 fragment, 3.67 µL G3 fragment, 2.24 µL G4 fragment (the volumes were calculated by our instructor) with 10 µL NEBuilder HiFi DNA Assembly Master mix, and the sample was incubated at 50 ℃ for 1 hour.
The thermocycler was switched off without notice, so the samples stayed at room temperature for an hour before the thermocycler was turned on again…
Transformation of Gibson assembly product:
2 µL Gibson assembly product was transformed into DH5α cells by following after the procedure from 25. 06. 2018
Measure the fluorescence of RRvT:
The overnight cultures with RRvT, RFP and a negative control was diluted until target absorbance Abs600 = 0.1 Four replicates of each culture (100 µL) were added to a 96 well microtiter plate. The Absorbance and the fluorescence were measured with the following settings: 150 cycles with 5 min interval Emission wavelength: 607 nm Exitation wavelength: 584 nm Temperature: 37 ℃ Gain: 22
Results:
Gel purification of pdCas9 fragments for Gibson assembly:
The order of the different fragments from left to right: ladder, G1, G2, G3 and G4. The fragments for Gibson assembly should have the length of 641 bp, 481 bp, 2917 bp and 1468 bp, respectively.
Fluorescence of RRvT:
The values of the fluorescence were too low when the samples were measured with a gain of 22. The liquid in the wells has been evaporated during the measurement.
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Sept14
Inoculate successful transformed cells, Restreak V. natriegens, amplify gRNA and dCas9 for insertion into LITMUS28i vector
Goal:
- Inoculate successful transformed cells
- Restreak V. natriegens on agar plates
- Amplify gRNA and dCas9 (without mutation) sequence for insertion into LITMUS28i vector
Procedure:
Colony picking:
Successful transformed cells (probably with correct Gibson Assembly product of pdCas9) were inoculated to LB medium with CM. The cell cultures were incubated at 37 ℃ overnight with shaking.
Re-streak Vibrio natriegens on agar plates:
Vibrio natriegens was inoculated and was stoke on LA with v2 salt aseptically. The agar plates were incubated at room temperature.
Amplification of gRNA and dCas9:
The primer pairs of gRNA and dCas9 (ordered from Sigma Aldrich) were diluted with ddH2O, so the concentration of the primers was 100 µM The primers were further diluted until target concentration = 1 µM PCR mix were prepared after the following recipe: pgRNA (0.5 µL, 37.2 ng/ µL), 6 µL FWD primer, 6 µL REV primer, 12.5 µL Takara HiFi PCR premix. pdCas9 (0.5 µL, 53.4 ng/ µL), 6 µL FWD primer, 6 µL REV primer, 12.5 µL Takara HiFi PCR premix. The gRNA sequence was amplified by running the sample with a PCR machine with an annealing temperature 55 ℃ for 10 s, and an elongation temperature 72 ℃ for 1 min. The dCas9 sequence was amplified with an annealing temperature 55 ℃ for 10 s, and an elongation temperature 72 ℃ for 7 min.
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Sept15
Isolation, digestion of Gibson assembled pdCas9, gel digestion and isolation of gRNA and dCas9 fragments (for insertion into LITMUS28i), inoculation of V. natriegens
Goal:
- Isolate Gibson assembled pdCas9 from overnight cultures
- Test digest the Gibson assembled pdCas9
- Make glycerol stock of cells with Gibson assembled pdCas9 (pdCas9 mutated)
- Gel separate the PCR products of gRNA and dCas9 (for insertion into LITMUS28i vector)
- Gel digest and isolate the gRNA and dCas9 fragments (for insertion into LITMUS28i vector)
- Inoculate natriegens in LB medium with v2 salts
Procedure:
Isolation of Gibson assembled pdCas9:
Overnight cultures were diluted until OD600 ≈9 pdCas9 was isolated from the cells by following after the miniprep protocol from 22.06.2018.
Test digest Gibson assembled pdCas9:
The enzymes EcoRI and XbaI were selected to verify whether the Gibson assembly of pdCas9 was successful or not. For 0.5 µL enzyme, 250 ng DNA is required. The different replicates were prepared by following recipe:
PC1: 5 µL DNA, 2 µL Buffer, 0.5 µL EcoRI, 0.5 µL XbaI, 12 µL ddH2O
PC2: 7 µL DNA, 2 µL Buffer, 0.5 µL EcoRI, 0.5 µL XbaI, 10 µL ddH2O
PC3: 12 µL DNA, 2 µL Buffer, 0.5 µL EcoRI, 0.5 µL XbaI, 5 µL ddH2O
The samples were incubated at 37 ℃ for 3h, before gel separation.
Glycerol stock of Gibson assembled pdCas9 (pdCas9 mutated):
DH5α cells with the Gibson assembled pdCas9 were stored in glycerol stock at -80 ℃ by following after the procedure from day 28.06.2018.
Gel separation of gRNA and dCas9 (not mutated) fragments (for insertion into LITMUS28i vector):
5 µL loading dye was added to each sample. The samples ran on gel green at 90 V for 50 min.
Gel digest and DNA isolation:
The gRNA and dCas9 fragments were isolated from the gel by conducting the same protocol from 02.07.2018.
Incoulation of V. natriegens:
Coloies of V. natriegens were inoculated into LB medium with v2 salt. The cell cultures were incubated at 37 ℃ overnight with shaking.
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Sept16
Transformation of plasmid with TetR into competent cells, mak glycerol stocks of V. natriegens
Goal:
- Transform the part BBa_R0040 (plasmid with TetR) into competent cells
- Make glycerol stocks of natriegens
Procedure:
Transformation of BBa_R004:
The plasmid was resuspended with 10 µL ddH2O in the well of the plate (provided by iGEM).
10 µL DNA was transformed into DH5α by following after the protocol from 25.06.2018.
Glycerol stock of Vibrio natriegens:
Overnight cultures of V. natriegens was stored in glyrecol stock at -80 ℃.
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Sept17
Amplification of LITMUS28i vector, inoculation of successful transformed cells, revive cells with RRvT and RFP
Goal:
- Amplification of LITMUS28i sequence
- Inoculate successful transformed cells with part BBa_R0040 (plasmid with TetR)
- Revive cells with RRvT and RFP
Procedure:
Amplification of LITMUS28i sequence:
- Designed primers (bought from Sigma Aldrich) were resuspended and diluted to 1 μM.
- The LITMUS28i vector (sponsored by NEB) was diluted to 25 ng/μ
- The diluted primer pair (6 μL of each primer) for LITMUS28i was mixed with the diluted LITMUS28i vector (1 μL) and Takara HiFi PCR premix (12.5 μL).
- The LITMUS 28i sequence was amplified after running in a PCR machine with an annealing temperature of 55 ℃ for 10 s and elongation temperature 72 ℃ for 2 min.
Inoculation of successful transformed cells:
Successful transformed cells with TetR was inoculated into LB medium with CM. The cell culture was incubated overnight at 37 ℃ with shaking.
Revive cells with RRvT and RFP:
Cells stored at -80 ℃ were revived by inoculation into LB medium with CM and incubated overnight at 37 ℃ with shaker.
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Sept18
Measure the fluorescence of RRvT, separation and isolation of LITMUS28i fragment, Gibson assemble LITMUS28i fragment, dCas9 and gRNA
Goal:
- Measure the fluorescence of RRvT, RFP and TetR
- Separate LITMUS28i sequence on gel
- Gel digest and isolate LITMUS28i segment
- Gibson assemble LITMUS28i sequence, dCas9 and gRNA with anti-luxS
Procedure:
Fluorescence measurement:
- The overnight cell cultures with RRvT, RFP and TetR were diluted to target Abs600 = 0,2.
- 100 μL of each cell cultures were pipetted to a 96 well plate with 4 replicates. The cellcultres were surrounded with LB medium with CM to reduce evaporation of the cell cultures in the wells. The plate was covered with a lid and the plate was sealed with parafilm.
- The absorbance and the fluorescence were measured with a five-minute interval for 150 cycles with a target temperature 37 ℃. The gain was set to 40, wave length of absorbance was set to 588 nm, while the excitation and the emission wavelength were set to 584 nm and 607 nm, respectively.
Gel electrophoresis:
05 μL loading dye was added to the PCR product of LITMUS28i vector (25 μL). The PCR product was separated on gel green, and the desired sequence was cut out from the gel.
Gel digest and DNA isolation:
The desired DNA sequence was isolated by digesting the gel by conducting the same procedure from 02.07.2018.
Gibson assembly:
LITMUS28i, dCas9 and gRNA with anti-luxS were assembled via Gibson assembly. The amount (pmol) required of the different fragments were calculated by the calculator provided by the homepage of NEB, and by following after the protocol of NEBuilder HiFi DNA Assembly
LITMUS28i sequence (2295 bp, 68 ng/μL): 0.8 μL gRNA (538 bp, 43 ng/μL): 0.59 μL dCas9 (5025 bp, 52 ng/ μL): 4.92 μL NEBuilder HiFi DNA assembly master mix: 10 μL ddH2O: 3.69 μL
The sample was incubated at 50 ℃ for an hour. The sample was stored in the fridge
Results:
Fluorescence measurement of RRvT:
The fluorescence of RRvT and RFP was constant over time, and the value of the fluorescence of RRvT and RFP was lower than the fluorescence measured from the medium...
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Sept19
Measure growth curve of V. natriegens, transformation of Gibson assembled LITMUS28i, test digest mutated pdCas9
Goal:
- Measure the growth curve of V. natriegens
- Transform Gibson assembled LITMUS28i (with unmutated dcas9 and gRNA with anti-luxS) into DH5α cells
- Test digest the mutated pdCas9 with EcoRI and SpeI
Procedure:
Growth curve of V. natriegens:
Overnight cultures were diluted to a target OD600 = 0.05 in 250 mL baffled flasks with a final volume 40 mL. The cell cultures were incubated at 37 ℃ with shaking. The OD600 of each replicate was measured after 10 min incubation for 5 hours.
Transformation of Gibson assembled LITMUS28i vector:
2 μL Gibson assembled LITMUS28i vector that consists unmutated dCas9 and gRNA with anti-luxS was transformed into competent cells after following the same procedure from 25.06.2018.
Restriction digest the mutated pdCas9:
The mutated pdCas9 was cut with EcoRI and SpeI by mixing 5 μL DNA (PC1), 2 μL cut smart buffer, 0.5 μL EcoRI, 0.5 μL SpeI and 12 μL dH2O. The reagent was incubated overnight at 37 ℃.
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Sept20
Gel separation of digested pdCas9 (mutated), preparation of ligation of mutated dCas9 and iGEM backcone
Goal:
Gel separation of the product from the enzyme digestion of mutated pdCas9
Digestion of mutated pdCas9 and pSB1C3 (preparation for ligation of dCas9 and pSB1C3).
Procedure:
Gel electrophoresis:
The products of enzyme digestion of mutated pdCas9 that has been incubated overnight, were mixed with 3.34 μL loading dye. The DNA segments were separated after running them on gel red at 90 V for 45 min.
Digestion of mutated pdCas9 and pSB1C3:
The DNA were digested after the following recipe
pdCas9: 5 μL DNA (PC1, 50.8 ng/μL), 2 μL 2.1 buffer, 0.5 μL EcoRI, 0.5 μL PstI, 12 μL ddH2O. Linear pSB1C3: 10 μL DNA (linear pSB1C3, 25 ng/μL), 2 μL 2.1 buffer, 0.5 μL EcoRI, 0.5 μL PstI, 7 μL ddH2O.
The samples were incubated at 37 ℃ overnight.
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Sept21
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Oct11Double transformation with pgRNA and new pdCas9
Goal:1. Transformation of pgRNA and pdCas9 into DH5a and TG1-cells.
Procedure:Both pdCas9(2) and pgRNA(2) with anti-luxS were simultaneously transformed into competent cells (DH5α) after the following protocol:
- Thaw competent cells on ice.
- Add pdCas9(2) (5μL) and pgRNA(2) with anti-luxS (5μL) to the same tube containing competent cells.
- Incubate the cells on ice for 20min.
- Heat shock the cells for 45s at 42℃.
- Incubate the cells on ice for 2min.
- Add LB- medium (900μL).
- Incubate the cells for 1.5h (max. 2h) at 37℃ with shaker.
- Plate the cells (100μL) on agar with AMP and CM
- Centrifuge the cell culture for 3min at 6800g.
- Discard the supernatant (200μL)
- Resuspend the pellet with the remining supernatant in the tube
- Plate the cells (100μL) on agar with AMP and CM.
Colonies on the plates with DH5a. No colonies on the plates with TG1.
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