On the mysterious propulsion of Synechococcus.

On the mysterious propulsion of Synechococcus.
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DOI:
10.1371/journal.pone.0036081
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Oster G
Oster G
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Ehlers K;Oster G

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我们提出了一个海洋细菌聚球藻的自我推进模型,该模型利用一个连续的环状螺旋轨迹,类似于在粘菌中发现的。在我们的模型中,载货蛋白质马达在质子动力的驱动下,沿着连续的环形螺旋轨迹移动。货物的移动产生了沿螺旋轨道上方的S层以小幅度行进脊的形式的表面扭曲。螺旋带附近产生的流体运动提供了推进推力。的螺旋转子模型的变体允许电机锚定到肽聚糖层,在那里它们驱动轨道的旋转,从而沿着S层产生行进的螺旋波。我们推导了游动速度与螺旋转子诱导的表面波的幅度、波长和速度之间的关系式,并表明它们落在合理的范围内,从而解释了游动聚球藻的速度和转速。
We propose a model for the self-propulsion of the marine bacterium Synechococcus utilizing a continuous looped helical track analogous to that found in Myxobacteria. In our model cargo-carrying protein motors, driven by proton-motive force, move along a continuous looped helical track. The movement of the cargo creates surface distortions in the form of small amplitude traveling ridges along the S-layer above the helical track. The resulting fluid motion adjacent to the helical ribbon provides the propulsive thrust. A variation on the helical rotor model of allows the motors to be anchored to the peptidoglycan layer, where they drive rotation of the track creating traveling helical waves along the S-layer. We derive expressions relating the swimming speed to the amplitude, wavelength, and velocity of the surface waves induced by the helical rotor, and show that they fall in reasonable ranges to explain the velocity and rotation rate of swimming Synechococcus.
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