The RpoS-mediated general stress response in Escherichia coli.

The RpoS-mediated general stress response in Escherichia coli.
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DOI:
10.1146/annurev-micro-090110-102946
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发表时间:
2011
影响因子:
10.5
通讯作者:
Gottesman S
Gottesman S
中科院分区:
生物学1区
文献类型:
--
作者:
Battesti A;Majdalani N;Gottesman S

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在营养缺乏或受到压力的条件下,或者当细胞进入稳定期时,大肠杆菌及相关细菌会增加一种特殊的西格玛因子RpoS的积累。依赖于RpoS的基因表达会使细胞产生普遍的抗压能力。在快速生长期间,RpoS的翻译受到抑制,并且任何已合成的RpoS蛋白都会迅速降解。通过分析在特定压力处理后RpoS的诱导情况,从指数生长到稳定期的复杂转变已得到部分剖析。不同的压力条件会诱导特定的小RNA(sRNAs),这些小RNA会刺激RpoS的翻译,或者会诱导(相关过程)。这一进展使我们对压力如何导致RpoS的诱导以及依赖于RpoS的基因如何帮助细胞应对压力有了更好的(但仍远非完整的)理解。
Under conditions of nutrient deprivation or stress or as cells enter stationary phase, Escbericbia coli and related bacteria increase the accumulation of RpoS, a specialized sigma factor. RpoS-dependent gene expression leads to general stress resistance of cells. During rapid growth RpoS translation is inhibited and any RpoS protein that is synthesized is rapidly degraded. The complex transition from exponential growth to stationary phase has been partially dissected by analyzing the induction of RpoS after specific stress treatments. Different stress conditions lead to induction of specific sRNAs that stimulate RpoS translation or to induction progress has led to a better, but still far from complete, understanding of how stresses lead to RpoS induction and what RpoS-dependent genes help the cell deal with the stress.
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