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Catabolite repression of thiosulfate reduction bySalmonella typhimurium

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Abstract

The effect of glucose and other carbon sources on thiosulfate reduction and on the expression ofphs bySalmonella typhimurium was examined. Glucose repressed both H2S production from thiosulfate and methyl viologen-linked thiosulfate reductase activity. Cyclic AMP (2 mM) in the growth medium restored both activities. Cyclic AMP was essential for both activities in acya mutant. Glucose and many other sugars repressedphs expression in both Cya+ and Cya− phs::Mu d1(Apr lac) operon fusion mutants. Increasing cyclic AMP to 10 mM increasedphs expression in the presence of some, but not all, sugars. It appears that catabolite repression of thiosulfate reduction inS. typhimurium involves more than a simple requirement for cyclic AMP.

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Authors and Affiliations

  1. Department of Food Science and Technology, University of California, 95616, Davis, California, USA

    Marta A. Clark &  Ericka L. Barrett

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  1. Marta A. Clark
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  2. Ericka L. Barrett
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Clark, M.A., Barrett, E.L. Catabolite repression of thiosulfate reduction bySalmonella typhimurium . Current Microbiology 16, 27–31 (1987). https://doi.org/10.1007/BF01568165

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