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ENZYME entry: EC 1.7.2.6

Accepted Name
Hydroxylamine dehydrogenase.
Alternative Name(s)
Hydroxylamine oxidase.
Reaction catalysed
  • Hydroxylamine + H(2)O + 4 ferricytochrome c <=> nitrite + 4 ferrocytochrome c + 5 H(+)
  • Hydroxylamine + 3 ferricytochrome c <=> nitric oxide + 3 ferrocytochrome c + 3 H(+)
Cofactor(s)
Heme.
Comment(s)
  • The enzymes from the nitrifying bacterium Nitrosomonas europaea and the methylotrophic bacterium Methylococcus capsulatus are hemoproteins with seven c-type hemes and one specialized P460-type heme per subunit.
  • The enzyme converts hydroxylamine to nitrite via an enzyme-bound nitroxyl intermediate.
  • While nitrite is the main product, the enzyme from Nitrosomonas europaea can produce nitric oxide as well.
  • Formerly EC 1.7.3.4.
Cross-references
BRENDA1.7.2.6
EC2PDB1.7.2.6
ExplorEnz1.7.2.6
PRIAM enzyme-specific profiles1.7.2.6
KEGG Ligand Database for Enzyme Nomenclature1.7.2.6
IUBMB Enzyme Nomenclature1.7.2.6
IntEnz1.7.2.6
MEDLINEFind literature relating to 1.7.2.6
MetaCyc1.7.2.6
Rhea expert-curated reactions1.7.2.6
UniProtKB/Swiss-Prot
Q50925, HAO_NITEU

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