Hydroxylamine dehydrogenase (, ''HAO (ambiguous)'') is an
enzyme
Enzymes () are proteins that act as biological catalysts by accelerating chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products. A ...
with
systematic name ''hydroxylamine:ferricytochrome-c oxidoreductase''.
This enzyme
catalyses the following
chemical reaction
: (1)
hydroxylamine + H
2O + 2 ferricytochrome c
nitrite + 2 ferrocytochrome c + 5 H
+
: (2)
hydroxylamine + ferricytochrome c
nitric oxide
Nitric oxide (nitrogen oxide or nitrogen monoxide) is a colorless gas with the formula . It is one of the principal oxides of nitrogen. Nitric oxide is a free radical: it has an unpaired electron, which is sometimes denoted by a dot in its che ...
+ ferrocytochrome c + 3 H
+
The enzymes from the
nitrifying bacterium ''
Nitrosomonas europaea'' and the methylotrophic bacterium ''
Methylococcus capsulatus
''Methylococcus capsulatus'' is an obligately methanotrophic gram-negative, non-motile coccoid bacterium. ''M. capsulatus'' are thermotolerant; their cells are encapsulated and tend to have a diplococcoid shape. In addition to methane, ''M. ...
'' are
hemoproteins.
References
External links
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EC 1.7.2