Reaction: L-dopa + O2 = 5-(L-alanin-3-yl)-2-hydroxy-cis,cis-muconate 6-semialdehyde
Glossary: L-dopa = 3,4-dihydroxy-L-phenylalanine
Systematic name: 3,4-dihydroxy-L-phenylalanine:oxygen 2,3-oxidoreductase (recyclizing)
Comments: The intermediate product undergoes ring closure and oxidation, with NAD(P)+ as acceptor, to stizolobinic acid. The enzyme requires Zn2+.
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number: 65979-38-6
1. Saito, K. and Komamine, A. Biosynthesis of stizolobinic acid and stizolobic acid in higher plants. An enzyme system(s) catalyzing the conversion of dihydroxyphenylalanine into stizolobinic acid and stizolobic acid from etiolated seedlings of Stizolobium hassjoo. Eur. J. Biochem. 68 (1976) 237-243. [PMID: 9285]
2. Saito, K. and Komamine, A. Biosynthesis of stizolobinic acid and stizolobic acid in higher plants. Eur. J. Biochem. 82 (1978) 385-392. [PMID: 624278]