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Literature summary extracted from

  • Adams, B.; Smith, A.T.; Bailey, S.; McEwan, A.G.; Bray, R.C.
    Reactions of dimethylsulfoxide reductase from Rhodobacter capsulatus with dimethyl sulfide and with dimethyl sulfoxide: complexities revealed by conventional and stopped-flow spectrophotometry (1999), Biochemistry, 38, 8501-8511.
    View publication on PubMed

Organism

EC Number Organism UniProt Comment Textmining
1.8.5.3 Rhodobacter capsulatus
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Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
1.8.5.3 dimethylsulfide + H2O + oxidized benzyl viologen
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 Rhodobacter capsulatus dimethylsulfoxide + reduced benzyl viologen
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 r
1.8.5.3 dimethylsulfide + H2O + oxidized methyl viologen
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 Rhodobacter capsulatus dimethylsulfoxide + reduced methyl viologen
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 r
1.8.5.3 dimethylsulfoxide + reduced benzyl viologen
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 Rhodobacter capsulatus dimethylsulfide + H2O + oxidized benzyl viologen
-
 r
1.8.5.3 dimethylsulfoxide + reduced methyl viologen
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 Rhodobacter capsulatus dimethylsulfide + H2O + oxidized methyl viologen
-
 r
1.8.5.3 additional information Second-order rate constants for the two-electron reduction and reoxidation reactions at pH 5.5 are 190000 and 430 per M and s, respectively, while at pH 8.0, the catalytic step is rate-limiting. Kinetically, for the two-electron reactions, the enzyme is more effective in dimethylsulfide oxidation than in dimethylsulfoxide reduction. Reduction of DMSOR by dimethylsulfide is incomplete below 1 mM dimethylsulfide but complete at higher concentrations. Reoxidation of the dimethylsulfide-reduced state by dimethylsulfoxide is always incomplete Rhodobacter capsulatus ?
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 ?

Synonyms

EC Number Synonyms Comment Organism
1.8.5.3 DMSOR
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 Rhodobacter capsulatus

Turnover Number [1/s]

EC Number Turnover Number Minimum [1/s] Turnover Number Maximum [1/s] Substrate Comment Organism Structure
1.8.5.3 8
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 Dimethylsulfide pH 8.0, 25°C Rhodobacter capsulatus
1.8.5.3 17
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 reduced benzyl viologen pH 8.0, 25°C Rhodobacter capsulatus
1.8.5.3 27
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 reduced methyl viologen pH 8.0, 25°C Rhodobacter capsulatus

pH Optimum

EC Number pH Optimum Minimum pH Optimum Maximum Comment Organism
1.8.5.3 6.5
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 reduction of dimethyl sulfoxide Rhodobacter capsulatus
1.8.5.3 8.3
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 oxidation of dimethyl sulfide Rhodobacter capsulatus