hydroxylamine dehydrogenase EC#: 1.7.2.6; ChemWhat Code: 1374629
| Product Name | hydroxylamine dehydrogenase |
| Example Structure |  |
| Synonyms | HAO, haoA, HCR, HOA, hydroxylamine cytochrome c554 oxidoreductase, hydroxylamine oxidase, hydroxylamine oxidoreductase, hydroxylamine-cytochrome c reductase, hydroxylamine:oxygen oxidoreductase, NeHAO, NoHAO |
| EC Number | 1.7.2.6 |
| CAS Registry Number | 9075-43-8 |
| Comments | The enzymes from the nitrifying bacterium Nitrosomonas europaea [1,4] and the methylotrophic bacterium Methylococcus capsulatus [5] 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 [3]. While nitrite is the main product, the enzyme from Nitrosomonas europaea can produce nitric oxide as well [2]. |
| Cofactor | heme |
| History | |
| Reactions | (1) Hydroxylamine + H(2)O + 4 ferricytochrome c = nitrite + 4 ferrocytochrome c + 5 H(+). (2) Hydroxylamine + 3 ferricytochrome c = nitric oxide + 3 ferrocytochrome c + 3 H(+). |
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