Zipping and entanglement in flagellar bundle of E. coli: Role of motile cell body
Zipping and entanglement in flagellar bundle of E. coli: Role of motile cell body
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DOI：
10.1103/physreve.92.052701
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发表时间：
2015-11-02
影响因子：
2.4
通讯作者：
Stark, Holger
中科院分区：
文献类型：
--
作者：
Adhyapak, Tapan Chandra;Stark, Holger
围毛细菌如E.大肠杆菌中，关键取决于几个旋转鞭毛的同步和自组织水平。然而，每个鞭毛的旋转产生身体的反向运动，这反过来又影响鞭毛动力学。利用E.大肠杆菌，我们表明，鞭毛纠缠，除了流体流动相对于移动的身体，显着改变鞭毛的动态相比，锚定鞭毛。特别是，束形成发生通过拉链运动在一个非常快的时间，受初始鞭毛取向。一个简化的分析模型支持我们的观察。最后，我们说明了如何纠缠，流体动力学相互作用和身体运动有助于拉链和捆绑。
The course of a peritrichous bacterium, such as E. coli, crucially depends on the level of synchronization and self-organization of several rotating flagella. However, the rotation of each flagellum generates countermovements of the body which in turn affect the flagellar dynamics. Using a detailed numerical model of an E. coli, we demonstrate that flagellar entanglement, besides fluid flow relative to the moving body, dramatically changes the dynamics of flagella from that compared to anchored flagella. In particular, bundle formation occurs through a zipping motion in a remarkably rapid time, affected little by initial flagellar orientation. A simplified analytical model supports our observations. Finally, we illustrate how entanglement, hydrodynamic interactions, and body movement contribute to zipping and bundling.