The authors have identified a fourth flagellin gene in a 21850 bp region of the C58C1 chromosome containing at least 20 genes concerned with flagellar structure, assembly and function. Three flagellin genes, and orientated rightward, are positioned in a tandem array at the right end, with the fourth, substantially larger gene, in the opposite orientation, at the left end. Between these lie four apparent operons, two transcribed in each direction ( leftward; rightward) from a divergent position approx 7·5 kb from the left end. This unifies the previously published and sequences into a single region, also containing the homologues of and Site-specific mutagenesis of results in a non-flagellate phenotype, while a Tn5-induced mutant possesses abnormal flagella. Mutagenesis and protein profiling demonstrate that all four flagellins contribute to flagellar structure: FlaA is the major protein, FlaB and FlaC are present in lesser amounts, and FlaD is a minor component. FlaA has anomolous elctrophoretic mobility, possibly due to glycosylation.


Article metrics loading...

Loading full text...

Full text loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error