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Updated: May 29, 2026

Biophysical Characterization of Flagellar Motor Functions
Published on: January 18, 2017
Sodium-driven motor of the polar flagellum in marine bacteria Vibrio
Na Li1, Seiji Kojima, Michio Homma
1Division of Biological Science, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Japan.
Abstract:
The Na(+) -driven bacterial flagellar motor is a molecular machine powered by an electrochemical potential gradient of sodium ions across the cytoplasmic membrane. The marine bacterium Vibrio alginolyticus has a single polar flagellum that enables it to swim in liquid. The flagellar motor contains a basal body and a stator complexes, which are composed of several proteins. PomA, PomB, MotX, and MotY are thought to be essential components of the stator that are required to generate the torque of the rotation. Several mutations have been investigated to understand the characteristics and function of the ion channel in the stator and the mechanism of its assembly around the rotor to complete the motor. In this review, we summarize recent results of the Na(+) -driven motor in the polar flagellum of Vibrio.
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