Bacterial flagellar motor

An ion-powered rotary machine driving bacterial flagellar motion. Its energy source and conformational switch are separable: inward ion flux can power either rotational direction.

A switch-complex component participating in organization of the bacterial flagellar rotor's cytoplasmic ring.

A switch-complex protein involved in reception of phosphorylated CheY and control of rotational bias.

A rotor protein involved in stator contact and torque generation. Changes in its organization contribute to directional switching without reversal of ion flow.

A stator-associated protein contributing proton-coupling machinery and anchorage to the cell envelope in the familiar proton-driven motor.

A stator protein contributing to ion-coupled force generation in proton-driven bacterial flagellar motors.