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Information on EC - superoxide oxidase

for references in articles please use BRENDA:EC1.10.3.17
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EC Tree
IUBMB Comments
This membrane-bound, di-heme containing enzyme, identified in the bacterium Escherichia coli, is responsible for the detoxification of superoxide in the periplasm. In vivo the reaction proceeds in the opposite direction of that shown and produces oxygen. Superoxide production was only observed when the enzyme was incubated in vitro with an excess of ubiquinol.
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Word Map
  • photosystem
  • thylakoids
  • qa
  • photoinhibition
  • high-potential
  • pheophytins
  • oxygen-evolving
  • manganese-containing
  • low-potential
  • photoreduction
  • photoinhibitory
  • o2-evolving
  • plastoquinol
  • thermosynechococcus
  • psii-enriched
  • chlorophyll-binding
  • thermoluminescence
  • 3-3,4-dichlorophenyl-1,1-dimethylurea
  • mn-depleted
  • psbo
The enzyme appears in viruses and cellular organisms
Reaction Schemes
cytochrome b559, cyt b559, copper- and zinc-containing superoxide dismutase, superoxide oxidase, more
2 O2 + ubiquinol = 2 superoxide + ubiquinone + 2 H+
show the reaction diagram
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