T7 promoter+RBS b+Linker h+His+Linker f+AFM-1+T7 terminator

This part consists of T7 promoter, RBS and protein coding sequence（His+Linker f+AFM-1），and the biological module can be built into E.coli for protein expression.

Sequence and Features Status: 500 Content-type: text/html

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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 proteinAFM-1 NDM-23. It encodes a protein which is AFM-1 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 28.2 kD. In order to gain the highly purified target protein, we add His tag in N-terminal of AFM-1. 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 AFM-1.

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]Correction for Goldman et al., Evolution of sensory complexity recorded in a myxobacterial genome. Proc Natl Acad Sci U S A. 2006;103(51):19605. doi:10.1073/pnas.0609567103.