Sinorhizobium meliloti rpoE2 is necessary for H2O2 stress resistance during the stationary growth phase

被引：26

作者：

Flechard, Maud ^{[1
]}

Fontenelle, Catherine ^{[1
]}

Trautwetter, Annie ^{[1
]}

Ermel, Gwennola ^{[1
]}

Blanco, Carlos ^{[1
]}

机构：

[1] Univ Rennes 1, CNRS, UMR6026, DUALS, F-35042 Rennes, France

来源：

FEMS MICROBIOLOGY LETTERS | 2009年 / 290卷 / 01期

关键词：

transcription regulation; external superoxides; hydrogen peroxide; SodC; KatC; sigma E; CU; ZN SUPEROXIDE-DISMUTASE; SIGMA-FACTORS; ESCHERICHIA-COLI; CAULOBACTER-CRESCENTUS; PERIPLASMIC COPPER; OXIDATIVE STRESS; PROTECTIVE ROLE; CATALASE; SYMBIOSIS; GENE;

D O I：

10.1111/j.1574-6968.2008.01401.x

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

RpoE2 is an extracytoplasmic sigma factor produced by Sinorhizobium meliloti during stationary growth phase. Its inactivation affected the synthesis of the superoxide dismutase, SodC, and catalase, KatC. The absence of SodC within the cell did not result in an increased sensitivity to extracellular superoxides. In contrast, the absence of KatC affected the resistance of S. meliloti to H(2)O(2) during the stationary growth phase. A katC strain behaved as an rpoE2 strain during an H(2)O(2) challenge, suggesting that the H(2)O(2) sensitivity of the rpoE2 strain resulted only from the lack of KatC in this strain.

引用

页码：25 / 31

页数：7

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