1.7.2.9: hydroxylamine oxidase

This is an abbreviated version!
For detailed information about hydroxylamine oxidase, go to the full flat file.

Word Map on EC 1.7.2.9

1.7.2.9

heterotrophic

nitrification

nitrate

nitrify

nitrosomonas

wastewater

europaea

ammonia

sludge

n2o

anammox

nitrous

kuenenia

dinitrogen

stuttgartiensis

autotrophic

hydrazine

Reaction

+ 3 ferricytochrome c =

+ 3 ferrocytochrome c + 3 H+

Synonyms

HAO, haoA, Hox, hydroxylamine oxidoreductase, kustc1061, Mfumv2_2472, mHAO, NO-producing hydroxylamine oxidase

ECTree

1 Oxidoreductases

1.7 Acting on other nitrogenous compounds as donors

1.7.2 With a cytochrome as acceptor

1.7.2.9 hydroxylamine oxidase

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2	AA Sequence
1	Cloned(Commentary)
2	Cofactor
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2	General Information
1	Inhibitors
3	kcat/KM [mM/s]
3	KM Value [mM]
3	Molecular Weight [Da]
5	Natural Substrates/ Products (Substrates)
12	Organism
1	Pathway
1	pH Optimum
1	Reaction
3	Reference
6	Substrates and Products (Substrate)
4	Subunits
11	Synonyms
1	Systematic Name
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Systematic Name

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Systematic Name on EC 1.7.2.9 - hydroxylamine oxidase

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hydroxylamine:ferricytochrome-c oxidoreductase (nitric acid-forming)

The enzyme, characterized from the anaerobic ammonium-oxidizing (anammox) bacterium Kuenenia stuttgartiensis, is very similar to EC 1.7.2.6, hydroxylamine dehydrogenase. Both enzymes are homotrimeric enzymes in which each subunit contains seven c-type hemes and one specialized P460-type heme that is bound to a tyrosine residue in an adjacent subunit. However, this enzyme catalyses only the 3 electron oxidation of hydroxylamine, forming nitric oxide, and is not capable of performing further oxidation to form nitrite.