Difference between revisions of "Part:BBa K2324013"

Revision as of 16:40, 1 November 2017

pRha_FimH_1His

This part produces a FimH protein with a 6xHistidine tag inserted at the first amino acid position, that is the residue that remains at the N-terminus after the signal peptide has been cleaved during the membrane export process. This position is intended to improve the steric properties of the protein so as to ease the cell surface membrane export and to prevent interference with any native protein domains in the FimH which are involved in pilus biogenesis. The coding sequence is under the control of a rhamnose-inducible promoter, with a B0034 RBS and a B0015 terminator. The part, when induced, produces a metal binding FimH protein that should involve itself in pilus biosynthesis when co-transformed with a plasmid containing the fim operon

The part acts as a reporter. It gives clear and unambiguous evidence of protein expression. Once transformed into a number of possible E. coli strains (Top10, FimB KO, FimH KO), the fusion protein can be expressed by inducing the culture at 0.6 OD with 2% rhamnose for 20 hours. The production of the 6xHistidine tag can be tested by the use of an SDS-PAGE and a Western blot.

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Sequence and Features