Abstract
Flagella are extremely effective organelles of locomotion used by a variety of bacteria and archaea. Some bacteria, including <i>Aeromonas</i>, <i>Azospirillum</i>, <i>Rhodospirillum</i>, and <i>Vibrio</i> species, possess dual flagellar systems that are suited for movement under different circumstances. Swimming in liquid is promoted by a single polar flagellum. Swarming over surfaces or in viscous environments is enabled by the production of numerous peritrichous, or lateral, flagella. The polar flagellum is produced continuously, while the lateral flagella are produced under conditions that disable polar flagellar function. Thus at times, two types of flagellar organelles are assembled simultaneously. This review focuses on the polar and lateral flagellar systems of <i>Vibrio parahaemolyticus</i>. Approximately 50 polar and 40 lateral flagellar genes have been identified encoding distinct structural, motor, export/assembly, and regulatory elements. The sodium motive force drives polar flagellar rotation, and the proton motive force powers lateral translocation. Polar genes are found exclusively on the large chromosome, and lateral genes reside entirely on the small chromosome of the organism. The timing of gene expression corresponds to the temporal demand for components during assembly of the organelle: RpoN and lateral- and polar-specific σ<sup>54</sup>-dependent transcription factors control early/intermediate gene transcription; lateral- and polar-specific σ<sup>28</sup> factors direct late flagellar gene expression. Although a different gene set encodes each flagellar system, the constituents of a central navigation system (i.e., chemotaxis signal transduction) are shared.
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Dates
Type | When |
---|---|
Created | 21 years, 3 months ago (May 28, 2004, 4:45 a.m.) |
Deposited | 4 months, 2 weeks ago (April 23, 2025, 11:08 p.m.) |
Indexed | 1 month ago (Aug. 6, 2025, 9:06 a.m.) |
Issued | 21 years, 8 months ago (Jan. 1, 2004) |
Published | 21 years, 8 months ago (Jan. 1, 2004) |
Published Online | 21 years, 3 months ago (June 3, 2004) |
Published Print | 21 years, 8 months ago (Jan. 1, 2004) |
@article{McCarter_2004, title={Dual Flagellar Systems Enable Motility under Different Circumstances}, volume={7}, ISSN={2673-1673}, url={http://dx.doi.org/10.1159/000077866}, DOI={10.1159/000077866}, number={1–2}, journal={Microbial Physiology}, publisher={S. Karger AG}, author={McCarter, Linda L.}, year={2004}, pages={18–29} }