Part:BBa_K2933220
T7 promoter+RBS b+Linker h+His+Linker f+BIaB-14+T7 terminator
This part consists of T7 promoter, RBS and protein coding sequence（His+Linker f+BIaB-14），and the biological module can be built into E.coli for protein expression
Sequence and Features
- 10INCOMPATIBLE WITH RFC[10]Illegal XbaI site found at 47
- 12INCOMPATIBLE WITH RFC[12]Illegal NheI site found at 169
- 21INCOMPATIBLE WITH RFC[21]Illegal BglII site found at 765
- 23INCOMPATIBLE WITH RFC[23]Illegal XbaI site found at 47
- 25INCOMPATIBLE WITH RFC[25]Illegal XbaI site found at 47
- 1000COMPATIBLE WITH RFC[1000]
Usage and Biology
This composite part is made up with seven basic parts, the His tag, T7 promoter, RBS ，Linker h ，Linker f，T7 terminator and our target protein BlaB-14. It encodes a protein which is BlaB-14 fused with His tag.Linker h is from the vector pET-28a, which connects the RBS to His tag sequence.Linker f from vector pGEX-6p-1, contains the thrombin restriction site and T7 tag. The fusion protein is about 28.3 kD. In order to gain the highly purified target protein, we add His tag in N-terminal of BlaB-14. It is convenient for us to purify our target protein.
Molecular cloning
First, we used the vector pGEX-28a to construct our expression plasmid. And then we converted the plasmid constructed to E. coli DH5α to expand the plasmid largely.
Figure 1. The PCR result of BlaB-14.
After verification, it was determined that the construction is successful. We converted the plasmid to E. coli BL21(DE3) for expression and purification.
References
[1]González LJ, Vila AJ. Carbapenem resistance in Elizabethkingia meningoseptica is mediated by metallo-β-lactamase BlaB. Antimicrob Agents Chemother. 2012;56(4):1686–1692. doi:10.1128/AAC.05835-11
[2]Yum, J.H., Lee, E.Y., Hur, SH. et al. J Microbiol. (2010) 48:358.https://doi.org/10.1007/s12275-010-9308-5
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