To ensure our target genes were successfully cloned into the PSB1C3 backbone, we ran the electrophoresis of Taq PCR products to check the sizes of the insert genes.
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− | + | The gel of SDS-Page result are shown below. The mass of intein-CBD tag is 28 kDa, therefore, all the result shows the initial mass of each bacteriocin plus the mass of intein-CBD tag. From each SDS-Page result, we can confirm the production of target peptides. | |
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Revision as of 15:00, 2 October 2018
![](https://static.igem.org/mediawiki/2018/f/ff/T--NCTU_Formosa--Navigation.png)
Cloning
All of the sequences contained T7 promoter, RBS, bacteriocin, intein and CBD, were shown in Figure 1.
![](https://static.igem.org/mediawiki/2018/a/aa/T--NCTU_Formosa--biobrick.png)
After amplification with PCR, all the PCR products have their length around 1200 b.p. Each directly length is in the Table 1.
Bacteriocin |
Length |
Length of PCR product |
---|---|---|
Leucocyclicin Q | 186 b.p. | 1230 b.p. |
Enterocin B | 210 b.p. | 1254 b.p. |
Enterocin 96 | 219 b.p. | 1263 b.p. |
Lacticin Z | 153 b.p. | 1197 b.p. |
Enteriocin A | 192 b.p. | 1236 b.p. |
Bovicin HJ50 | 171 b.p. | 1215 b.p. |
Durancin TW-49M | 213 b.p. | 1257 b.p. |
Subtilosin | 147 b.p. | 1291 b.p. |
Electrophoresis results of the PCR products with marker on the left side and target gene on the right side.
The length are labeled beside each band.
![](https://static.igem.org/mediawiki/2018/1/1d/T--NCTU_Formosa--Lu_comp.png)
![](https://static.igem.org/mediawiki/2018/4/46/T--NCTU_Formosa--B_comp.png)
![](https://static.igem.org/mediawiki/2018/1/17/T--NCTU_Formosa--Bov_comp.png)
![](https://static.igem.org/mediawiki/2018/5/5a/T--NCTU_Formosa--96_comp.png)
![](https://static.igem.org/mediawiki/2018/2/24/T--NCTU_Formosa--Lac_comp.png)
![](https://static.igem.org/mediawiki/2018/2/23/T--NCTU_Formosa--A_comp.png)
![](https://static.igem.org/mediawiki/2018/d/d8/T--NCTU_Formosa--Dur_comp.png)
![](https://static.igem.org/mediawiki/2018/0/08/T--NCTU_Formosa--Sub_comp.png)
Protein Expression
After the expression from E. coli ER2566, we have to check whether the proteins are successfully expressed. We sonicate E. coli and run SDS-PAGE to make sure the correct sizes. The mass of each proteins are in Table 2.
Bacteriocin |
Mass (kDa) |
---|---|
Enterocin B | 7.5 |
Enterocin 96 | 7.9 |
Bovicin HJ50 | 6.25 |
Durancin | 7.3 |
Leucocyclicin Q | 6.4 |
Lacticin Z | 5.9 |
The gel of SDS-Page result are shown below. The mass of intein-CBD tag is 28 kDa, therefore, all the result shows the initial mass of each bacteriocin plus the mass of intein-CBD tag. From each SDS-Page result, we can confirm the production of target peptides.
![](https://static.igem.org/mediawiki/2018/6/65/T--NCTU_Formosa--expression_96_b.png)
(N1) Negative control: E. coli ER2566 without plasmid (N2) Negative control: E. coli ER2566 with empty plasmid
(A) Enterocin 96+intein+CBD (35.9kDa) (B) Enteroicin B+intein+CBD (35.5kDa)
![](https://static.igem.org/mediawiki/2018/f/f7/T--NCTU_Formosa--expression_lu_dur.png)
(N1) Negative control: E. coli ER2566 without plasmid (N2) Negative control: E. coli ER2566 with empty plasmid
(C) Leucocyclicin Q+intein+CBD (34.4kDa) (D) Durancin +intein+CBD (35.3kDa)