Antonie van Leeuwenhoek

, Volume 58, Issue 3, pp 157–161

The OxyR regulon

  • Gisela Storz
  • Louis A. Tartaglia
  • Bruce N. Ames


Treatment of Salmonella typhimurium and Escherichia coli cells with low doses of hydrogen peroxide results in the induction of thirty proteins and resistance to killing by higher doses of hydrogen peroxide. The expression of nine of the hydrogen peroxide-inducible proteins, including catalase, glutathione reductase and a novel alkyl hydroperoxide reductase is controlled by the positive regulator oxyR. OxyR is homologous to the LysR-NodD family of bacterial regulatory proteins and binds to the promoters of oxyR-regulated genes. The oxidized but not reduced form of the OxyR protein activates transcription of oxyR-regulated genes in vitro suggesting that oxidation of the OxyR protein brings about a conformational change by which OxyR both senses and transduces an oxidative stress signal to RNA polymerase.


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Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • Gisela Storz
    • 1
  • Louis A. Tartaglia
    • 2
  • Bruce N. Ames
    • 3
  1. 1.Laboratory of Molecular BiologyNational Cancer InstituteBethesdaUSA
  2. 2.Genentech Inc.South San FranciscoUSA
  3. 3.Division of Biochemistry and Molecular BiologyUniversity of CaliforniaBerkeleyUSA

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