User:Uebja/sandbox/Hydroxylamine Oxidoreductase

= Hydroxylamine Oxidoreductase = Hydroxylamine oxidoreductase (HAO) is an enzyme found in the prokaryote Nitrosomonas europaea. It plays a critically important role in the biogeochemical nitrogen cycle.

Structure
Crystallographic methods show that HAO (PDB code: 1FGJ) is a cross-linked tetramer containing 28 heme cofactors.

For many decades the enzyme was thought to catalyze the following reaction:

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Recent work in the field, however, reveals that this enzyme catalyzes an entirely different reaction:

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