IUBMB Enzyme Nomenclature


Accepted name: dopamine β-monooxygenase

Reaction: dopamine + 2 ascorbate + O2 = noradrenaline + 2 monodehydroascorbate + H2O

For diagram of dopa biosynthesis, click here

Glossary: dopamine = 4-(2-aminoethyl)benzene-1,2-diol

Other name(s): dopamine β-hydroxylase; MDBH (membrane-associated dopamine β-monooxygenase); SDBH (soluble dopamine β-monooxygenase); dopamine-B-hydroxylase; 3,4-dihydroxyphenethylamine β-oxidase; 4-(2-aminoethyl)pyrocatechol β-oxidase; dopa β-hydroxylase; dopamine β-oxidase; dopamine hydroxylase; phenylamine β-hydroxylase; (3,4-dihydroxyphenethylamine)β-mono-oxygenase; DβM (gene name)

Systematic name: dopamine,ascorbate:oxygen oxidoreductase (β-hydroxylating)

Comments: A copper protein. The enzyme, found in animals, binds two copper ions with distinct roles during catalysis. Stimulated by fumarate.

Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number: 9013-38-1


1. Levin, E.Y., Levenberg, B. and Kaufman, S. The enzymatic conversion of 3,4-dihydroxyphenylethylamine to norepinephrine. J. Biol. Chem. 235 (1960) 2080-2086. [PMID: 14416204]

2. Friedman, S. and Kaufman, S. 3,4-Dihydroxyphenylethylamine β-hydroxylase. Physical properties, copper content, and role of copper in the catalytic activity. J. Biol. Chem. 240 (1965) 4763-4773. [PMID: 5846992]

3. Skotland, T. and Ljones, T. Direct spectrophotometric detection of ascorbate free radical formed by dopamine β-monooxygenase and by ascorbate oxidase. Biochim. Biophys. Acta 630 (1980) 30-35. [PMID: 7388045]

4. Evans, J.P., Ahn, K. and Klinman, J.P. Evidence that dioxygen and substrate activation are tightly coupled in dopamine β-monooxygenase. Implications for the reactive oxygen species. J. Biol. Chem. 278 (2003) 49691-49698. [PMID: 12966104]

[EC created 1965 as EC, transferred 1972 to EC, modified 2020]

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