Response of Desulfovibrio vulgaris Hildenborough to hydrogen peroxide: enzymatic and transcriptional analyses.
Copyright policy )Response of Desulfovibrio vulgaris Hildenborough to hydrogen peroxide: enzymatic and transcriptional analyses.
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.
Time Factors, Superoxide Dismutase, Gene Expression Profiling, Gene Expression Regulation, Bacterial, Hydrogen Peroxide, Oxidants, Gene Expression Regulation, Enzymologic, [SDV] Life Sciences [q-bio], Repressor Proteins, Bacterial Proteins, Stress, Physiological, Desulfovibrio vulgaris, Peroxidase
Time Factors, Superoxide Dismutase, Gene Expression Profiling, Gene Expression Regulation, Bacterial, Hydrogen Peroxide, Oxidants, Gene Expression Regulation, Enzymologic, [SDV] Life Sciences [q-bio], Repressor Proteins, Bacterial Proteins, Stress, Physiological, Desulfovibrio vulgaris, Peroxidase
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