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ENZYME entry: EC

Accepted Name
Methanesulfonate monooxygenase (NADH).
Alternative Name(s)
Mesylate monooxygenase.
Methanesulfonic acid monooxygenase.
MSA monooxygenase.
Reaction catalysed
Methanesulfonate + NADH + O(2) <=> formaldehyde + NAD(+) + sulfite + H(2)O
Flavoprotein; Iron-sulfur.
  • Methanesulfonate is the simplest of the sulfonates and is a substrate for the growth of certain methylotrophic microorganisms.
  • Compared with EC, this enzyme has a restricted substrate range that includes only the short-chain aliphatic sulfonates (methanesulfonate to butanesulfonate) and excludes all larger molecules, such as arylsulfonates.
  • The enzyme from the bacterium Methylosulfonomonas methylovora is a multicomponent system comprising an hydroxylase, a reductase (MsmD) and a ferredoxin (MsmC).
  • The hydroxylase has both large (MsmA) and small (MsmB) subunits, with each large subunit containing a Rieske-type [2Fe-2S] cluster.
  • Formerly EC
PRIAM enzyme-specific profiles1.14.13.111
KEGG Ligand Database for Enzyme Nomenclature1.14.13.111
IUBMB Enzyme Nomenclature1.14.13.111
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