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Company: Panasonic
Catalog#: DMR-XP25V
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Measurements of Free-swimming Speed of Motile Salmonella Cells in Liquid Media
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2017-01-05
[Abstract]  Bacteria such as Escherichia coli and Salmonella enterica swim in liquid media using the bacterial flagella. The flagellum consists of the basal body (rotary motor), the hook (universal joint) and the filament (helical screw). Since mutants with a defect in flagellar assembly and function cannot swim smoothly, motility assay is an easy way to characterize flagellar mutants. Here, we describe how to measure free-swimming speeds of Salmonella motile cells in liquid media. Free-swimming behavior under a microscope shows a significant variation among bacterial cells. [摘要]  细菌如大肠杆菌和肠炎沙门氏菌在液体培养基中使用细菌鞭毛游泳。鞭毛由基体(旋转马达),钩(万向接头)和丝(螺旋螺钉)组成。由于鞭毛组装和功能缺陷的突变体不能顺利游动,所以运动测定是描绘鞭毛突变体的简单方法。在这里,我们描述如何测量液体介质中沙门氏菌活力细胞的游泳速度。显微镜下的游泳行为显示出细菌细胞之间的显着变化。

背景 fl ar。。。大肠杆菌和沙门氏菌由跨越细胞质膜的质子动力(PMF)的下坡质子易位(Morimoto和Minamino,2014; Minamino和Imada,2015)提供动力。质子驱动的鞭毛马达的旋转速度与总PMF成比例(Gabel和Berg,2003)。因此,运动细胞的游泳速度的测量使得我们不仅可以分析各种突变体的运动性能,还可以检查在实验条件下总PMF是否存在显着差异(Minamino等人)。 ,2016)。

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