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- W2156571857 abstract "The bacterial flagellar motor is an intricate nanomachine which converts ion gradients into rotational movement. Torque is created by ion-dependent stator complexes which surround the rotor in a ring. Shewanella oneidensis MR-1 expresses two distinct types of stator units: the Na+-dependent PomA4B2 and the H+-dependent MotA4B2. Here, we have explored the stator unit dynamics in the MR-1 flagellar system by using mCherry-labeled PomAB and MotAB units. We observed a total of between 7 and 11 stator units in each flagellar motor. Both types of stator units exchanged between motors and a pool of stator complexes in the membrane, and the exchange rate of MotAB, but not of PomAB, units was dependent on the environmental Na+-levels. In 200 mM Na+, the numbers of PomAB and MotAB units in wild-type motors was determined to be about 7:2 (PomAB:MotAB), shifting to about 6:5 without Na+. Significantly, the average swimming speed of MR-1 cells at low Na+ conditions was increased in the presence of MotAB. These data strongly indicate that the S. oneidensis flagellar motors simultaneously use H+ and Na+ driven stators in a configuration governed by MotAB incorporation efficiency in response to environmental Na+ levels." @default.
- W2156571857 created "2016-06-24" @default.
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- W2156571857 date "2015-03-31" @default.
- W2156571857 modified "2023-10-16" @default.
- W2156571857 title "Dual stator dynamics in the<i>S</i><i>hewanella oneidensis</i> MR-1 flagellar motor" @default.
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- W2156571857 doi "https://doi.org/10.1111/mmi.12984" @default.
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