Difference between revisions of "Part:BBa K2324012"

Revision as of 22:33, 1 November 2017

pJ23100_FimOp

This part contains the fim operon , minus the fimH under control of a constitutive promoter. The constituent genes code for structural proteins, such as FimA which makes up the majority of the main body of a pilus, and others which support the process of pilus biogenesis. When co-transformed with FimH constructs from our project, which have rhamnose-inducible promoters, modified type I pili may be produced. The part requires no induction, and therefore is able to continuously produce the large mass of protein encoded in the operon.

Results

We transformed this part into E. coli Top10 to image them using a negative staining method on a TEM to obtain an electron micrograph to visualise pili.

Figure 1 Top10 with the fim operon under the control of promoter P_J23100 showed no visible signs of pili expression with insertion of the operon alone.

The same part was then transformed into E. coli ΔFimB to also image it using a negative staining method on a TEM to obtain an electron micrograph to visualise pili.

Figure 2 We transformed a plasmid containing the fim operon under control of promoters P_J23100 into ΔFimB. It showed flagella on their cell surface, but no pili on the surface of the cell.

Conclusion

We were unsuccessful in producing pili on the cell surface of the cell, however the operon was not co-transformed with a fimH plasmid.

Sequence and Features