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Journal Article
Research Support, Non-U.S. Gov't
Response of Desulfovibrio vulgaris Hildenborough to hydrogen peroxide: enzymatic and transcriptional analyses.
FEMS Microbiology Letters 2010 September 2
We studied the effect of hydrogen peroxide (H(2)O(2)) stress on the anaerobic sulfate-reducing bacterium Desulfovibrio vulgaris Hildenborough. In a lactate/sulfate medium, growth was affected from 0.1 mM H(2)O(2) and totally inhibited at 0.7 mM. Surprisingly, transcript analyses revealed that the PerR regulon exhibited opposite regulation in the presence of 0.1 and 0.3 mM H(2)O(2). The variations in peroxidase- and superoxide dismutase-specific activities in the cell-free extracts of H(2)O(2)-stressed cultures were related to changes in the corresponding transcript abundance. Our data suggest that sod, sor, ngr and tpx genes, in addition to the PerR regulon, belong to the H(2)O(2) stimulon.
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