A hetero-hexameric complex of 2 membrane proteins, A and B, with stoichiometry A4B2. The A and B proteins form a channel through which flow the ions that power the bacterial-type flagellum. They form the stator, or nonrotating portion, of the flagellum motor with the B protein apparently attached to the peptidoglycan cell wall. Examples include the H+ driven MotA-MotB stator complex of Escherichia coli and Salmonella enterica, and the Na+ driven PomA-PomB stator complex of Vibrio and Shewanella species.
bacterial-type flagellum motor force generator complex