Survival of the drowsiest: the hibernating 100S ribosome in bacterial stress management.

Survival of the drowsiest: the hibernating 100S ribosome in bacterial stress management.
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DOI:
10.1007/s00294-017-0796-2
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发表时间:
2018-08
期刊:
影响因子:
2.5
通讯作者:
Yap MF
Yap MF
中科院分区:
生物学3区
文献类型:
--
作者:
Gohara DW;Yap MF

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为了应对营养匮乏和环境污染,细菌将两个非翻译 70S 核糖体拷贝结合起来,形成翻译失活的 100S 二聚体。这种普遍存在的现象被认为可以防止核糖体周转,并作为一个储存库,当条件变得有利时,可以将冬眠的核糖体分解并回收用于翻译。新的结构研究揭示了 70S 核糖体二聚化的两种不同机制,但拆卸过程的分子基础仍处于起步阶段。关于冬眠因子及其拮抗解聚因子的结合和离开的二聚解离事件序列的许多细节仍不清楚。
In response to nutrient deprivation and environmental insults, bacteria conjoin two copies of non-translating 70S ribosomes that form the translationally inactive 100S dimer. This widespread phenomenon is believed to prevent ribosome turnover and serves as a reservoir that, when conditions become favorable, allows the hibernating ribosomes to be disassembled and recycled for translation. New structural studies have revealed two distinct mechanisms for dimerizing 70S ribosomes, but the molecular basis of the disassembly process is still in its infancy. Many details regarding the sequence of dimerization-dissociation events with respect to the binding and departure of the hibernation factor and its antagonizing disassembly factor remain unclear.
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