IUBMB Enzyme Nomenclature


Accepted name: cysteine dioxygenase

Reaction: L-cysteine + O2 = 3-sulfinoalanine

For diagram click here.

Other name(s): cysteine oxidase

Systematic name: L-cysteine:oxygen oxidoreductase

Comments: Requires Fe2+ and NAD(P)H.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 37256-59-0


1. Lombardini, J.B., Singer, T.P. and Boyer, P.D. Cystein oxygenase. II. Studies on the mechanism of the reaction with 18oxygen. J. Biol. Chem. 244 (1969) 1172-1175. [PMID: 5767301]

[EC created 1972, modified 1976]

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