Chemotaxis signaling protein CheY binds to the rotor protein FliN to control the direction of flagellar rotation in Escherichia coli.

ABSTRACT: The direction of rotation of the Escherichia coli flagellum is controlled by an assembly called the switch complex formed from multiple subunits of the proteins FliG, FliM, and FliN. Structurally, the switch complex corresponds to a drum-shaped feature at the bottom of the basal body, termed the C-ring. Stimulus-regulated reversals in flagellar motor rotation are the basis for directed movement such as chemotaxis. In E. coli, the motors turn counterclockwise (CCW) in their default state, allowing the several filaments on a cell to join together in a bundle and propel the cell smoothly forward. In response to the chemotaxis signaling molecule phospho-CheY (CheY(P)), the motors can switch to clockwise (CW) rotation, causing dissociation of the filament bundle and reorientation of the cell. C

SUBMITTER: Sarkar MK 

PROVIDER: S-EPMC2889077 | biostudies-literature | 2010 May

REPOSITORIES: biostudies-literature