PROSITE documentation PDOC01011
Flagellar motor protein motA family signature


The bacterial protein motA [1] is required for the rotation of the flagellar motor. This protein probably forms a transmembrane proton channel used to energize the flagellar rotary motor. The motA protein is an integral membrane protein that contains four transmembrane domains.

As as signature for the motA family of proteins, we selected a conserved region that corresponds to the fourth transmembrane region.

Last update:

July 1999 / Pattern and text revised.


Technical section

PROSITE method (with tools and information) covered by this documentation:

MOTA, PS01307; Flagellar motor protein motA family signature  (PATTERN)


1AuthorsNguyen C.C. Saier M.H. Jr.
TitleStructural and phylogenetic analysis of the MotA and MotB families of bacterial flagellar motor proteins.
SourceRes. Microbiol. 147:317-332(1996).
PubMed ID8763618

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