What Is DBH (Dopamine-β-Hydroxylase)?

Dopamine β-hydroxylase (DBH) is an enzyme that converts dopamine to norepinephrine.

Dopamine
DBH is a 290 kDa copper-containing oxygenase consisting of four identical subunits, and its activity requires ascorbate as a cofactor. It is the only enzyme involved in the synthesis of small-molecule neurotransmitters that is membrane-bound, making norepinephrine the only transmitter synthesized inside vesicles. It is expressed in noradrenergic nerve terminals of the central and peripheral nervous systems, as well as in chromaffin cells of the adrenal medulla.

DBH is inhibited by disulfiram, tropolone, and, most selectively, by nepicastat.
Dopamine beta hydroxylase deficiency is a condition involving inadequate Dopamine beta hydroxylase.

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