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Literature summary extracted from

  • Logan, M.S.P.; Balny, C.; Hooper, A.B.
    Reaction with cyanide of hydroxylamine oxidoreductase of Nitrosomonas europaea (1995), Biochemistry, 34, 9028-9037.
    View publication on PubMed

KM Value [mM]

EC Number KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
1.7.2.6 0.003
-
 hydrazine pH 7.5, 25°C, with enzyme form HAO-A, that forms only the monocyano derivative of heme P460 Nitrosomonas europaea
1.7.2.6 0.005
-
 hydrazine pH 7.5, 25°C, with enzyme form HAO-B, that forms a mono- and dicyano complex Nitrosomonas europaea

Organism

EC Number Organism UniProt Comment Textmining
1.7.2.6 Nitrosomonas europaea
-
-
-

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
1.7.2.6 hydrazine + ferricytochrome c
-
 Nitrosomonas europaea ? + ferrocytochrome c
-
 ?
1.7.2.6 hydroxylamine + ferricytochrome c + H2O
-
 Nitrosomonas europaea nitrite + ferrocytochrome c + H+
-
 ?

Subunits

EC Number Subunits Comment Organism
1.7.2.6 dimer hypothesis that the enzyme is functionally a dimer in which electrons rapidly equilibrate between the c-hemes of each subunit but not between oligomers Nitrosomonas europaea

Synonyms

EC Number Synonyms Comment Organism
1.7.2.6 HAO
-
 Nitrosomonas europaea

Cofactor

EC Number Cofactor Comment Organism Structure
1.7.2.6 heme each subunit of the enzyme contains 7 c-hemes and 1 heme P460. The latter, a c-heme crosslinked from a methylene carbon to the ring of a protein tyrosine, forms part of the active site Nitrosomonas europaea