Reaction: 7-O-methylluteone + NADPH + H+ + O2 = dihydrofurano derivatives + NADP+ + H2O
Glossary:
luteone: 3-(2,4-dihydroxyphenyl)-5,7-dihydroxy-6-(3-methyl-2-butenyl)-4H-1-benzopyran-4-one
naringenin: (S)-2,3-dihydo-5,7-dihydroxy-2-(4-hydroxyphenyl)-4H-1-benzopyran-4-one
Other name(s): monoprenyl isoflavone monooxygenase; 7-O-methylluteone:O2 oxidoreductase; 7-O-methylluteone,NADPH:O2 oxidoreductase
Systematic name: 7-O-methylluteone,NADPH:oxygen oxidoreductase
Comments: A flavoprotein (FAD) with high specificity for monoprenyl isoflavone. The product of the prenyl epoxidation reaction contains an oxygen atom derived from O2, but not from H2O. It is slowly and nonenzymically converted into the corresponding dihydrofurano derivative. The enzyme in the fungus Botrytis cinerea is induced by the substrate analogue, 6-prenylnaringenin.
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number: 198496-86-5
References:
1. Tanaka, M. and Tahara, S. FAD-dependent epoxidase as a key enzyme in fungal metabolism of prenylated flavonoids. Phytochemistry 46 (1997) 433-439.