Atsumi T, McCarter L, Imae Y
Department of Molecular Biology, Faculty of Science, Nagoya University, Japan.
Nature. 1992 Jan 9;355(6356):182-4. doi: 10.1038/355182a0.
Various species of marine Vibrio produce two distinct types of flagella, each adapted for a different type of motility. A single, sheathed polar flagellum is suited for swimming in liquid medium, and numerous unsheathed lateral flagella, which are produced only under viscous conditions, are suited for swarming over viscous surfaces. Both types of flagella are driven by reversible motors embedded in the cytoplasmic membrane. Here we report that the energy source for the polar flagellar motor of Vibrio parahaemolyticus is the sodium-motive force, whereas the lateral flagellar motors are driven by the proton-motive force. This is evidence that two distinct types of flagella powered by different energy sources are functionally active in one cell.
多种海洋弧菌会产生两种不同类型的鞭毛，每种鞭毛都适应不同类型的运动方式。一根单独的、有鞘的极鞭毛适合在液体培养基中游动，而大量仅在粘性条件下产生的无鞘侧鞭毛则适合在粘性表面上群体游动。这两种类型的鞭毛均由嵌入细胞质膜的可逆马达驱动。在此，我们报告副溶血性弧菌的极鞭毛马达的能量来源是钠动力，而侧鞭毛马达则由质子动力驱动。这证明了由不同能量来源驱动的两种不同类型的鞭毛在一个细胞中发挥着功能作用。
