Trehalose synthesis genes are controlled by the putative sigma factor encoded by rpoS and are involved in stationary-phase thermotolerance in Escherichia coli.
摘要：
The rpoS (katF) gene of Escherichia coli encodes a putative sigma factor (sigma S) required for the expression of a variety of stationary phase-induced genes, for the development of stationary-phase stress resistance, and for long-term starvation survival (R. Lange and R. Hengge-Aronis, Mol. Microbiol. 5:49-59, 1991). Here we show that the genes otsA, otsB, treA, and osmB, previously known to be osmotically regulated, are also induced during transition into stationary phase in a sigma S-dependent manner. otsA and otsB, which encode trehalose-6-phosphate synthase and trehalose-6-phosphate phosphatase, respectively, are involved in sigma S-dependent stationary-phase thermotolerance. Neither sigma S nor trehalose, however, is required for the development of adaptive thermotolerance in growing cells, which might be controlled by sigma E.
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关键词：
Escherichia coli Sigma Factor Bacterial Proteins Trehalose Adaptation, Physiological Temperature Kinetics Gene Expression Regulation, Bacterial Osmotic Pressure Genes, Bacterial
DOI：
10.1111/j.1469-8137.1920.tb07324.x
被引量：
年份：
1991
万方医学
Semantic Scholar
掌桥科研
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