Function of periplasmic copper-zinc superoxide dismutase in Caulobacter crescentus

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33 Scopus citations


Caulobacter crescentus is one of a small number of bacterial species that contain a periplasmic copper-zinc superoxide dismutase (CuZnSOD). A C. crescentus mutant, with the CuZnSOD gene interrupted by a promoterless cat gene, was constructed and characterized to analyze CuZnSOD function. Periplasmic SOD does not protect against oxyradical damage in the cytosol or play a major role in maintaining the integrity of the cell envelope. Studies of the effect of sodium citrate on plating efficiency suggest that CuZnSOD protects a periplasmic or membrane function(s) requiring magnesium or calcium.

Original languageEnglish (US)
Pages (from-to)1198-1202
Number of pages5
JournalJournal of Bacteriology
Issue number4
StatePublished - 1993

ASJC Scopus subject areas

  • Microbiology
  • Molecular Biology


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