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ToI Energy-Driven Localization of Pal and Anchoring to the Peptidoglycan Promote Outer-Membrane Constriction

机译:PAL的TOI能量驱动定位和锚定肽聚糖促进外膜收缩

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摘要

During cell division, gram-negative bacteria must coordinate inner-membrane invagination, peptidoglycan synthesis and cleavage and outer-membrane (OM) constriction. The OM constriction remains largely enigmatic, and the nature of this process, passive or active, is under debate. The proton-motive force dependent Tol Pal system performs a network of interactions within these three compartments. Here we confirm that the trans-envelope Tol Pal complex accumulates at constriction site in Escherichia coli. We show that the inner-membrane complex composed of TolA, ToIQ and ToIR recruits the OM complex ToIB Pal to the septum, in an energy-dependent process. Pal recruitment then allows its binding to peptidoglycan and subsequently OM constriction. Our results provide evidence that the constriction of the OM is an energized process. (C) 2019 Published by Elsevier Ltd.
机译:在细胞分裂期间,革兰氏阴性细菌必须坐标内膜内肠,肽聚糖合成和切割和外膜(OM)收缩。 OM收缩仍然很大程度上是神秘的,这个过程的性质,被动或活跃的性质在辩论下。 质子动力依赖于PAL系统在这三个隔间内执行相互作用网络。 在这里,我们确认跨界托PAL复合体积累在大肠杆菌的收缩部位。 我们表明,由托拉,TOIQ和Toir组成的内膜复合物在能量依赖的过程中将OM复杂的Toib PAL招募到隔膜。 然后,PAL募集允许其与肽聚糖结合并随后om收缩。 我们的结果提供了证据表明,OM的收缩是一种充满活力的过程。 (c)2019年由elestvier有限公司发布

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