Journal
TRENDS IN MICROBIOLOGY
Volume 23, Issue 5, Pages 267-274Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.tim.2014.12.011
Keywords
bacterial flagellum; rotary motor; flagellar assembly; protein export; stator assembly
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Funding
- Japanese Ministry of Education, Culture, Sports, Science, and Technology
- Grants-in-Aid for Scientific Research [26293097, 24117004, 15H01640] Funding Source: KAKEN
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The bacterial flagellum is a reversible rotary motor powered by an electrochemical-potential difference of specific ions across the cytoplasmic membrane. The H+-driven motor of Salmonella spins at similar to 300 Hz, whereas the Na+-driven motor of marine Vibrio spp. can rotate much faster, up to 1700 Hz. A highly conserved motor structure consists of the MS ring, C ring, rod, and export apparatus. The C ring and the export apparatus show dynamic properties for exerting their functional activities. Various additional structures surrounding the conserved motor structure are observed in different bacterial species. In this review we summarize our current understanding of the structure, function, and assembly of the flagellar motor in Salmonella and marine Vibrio.
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