Reaction: (R)-6-hydroxynicotine + H2O + O2 = 1-(6-hydroxypyridin-3-yl)-4-(methylamino)butan-1-one + H2O2 (overall reaction)
(1a) (R)-6-hydroxynicotine + O2 = 5-(N-methyl-4,5-dihydro-1H-pyrrol-2-yl)pyridin-2-ol + H2O2
(1b) 5-(N-methyl-4,5-dihydro-1H-pyrrol-2-yl)pyridin-2-ol + H2O = 1-(6-hydroxypyridin-3-yl)-4-(methylamino)butan-1-one (spontaneous)
For diagram of reaction click here.
Glossary: (R)-6-hydroxynicotine = 5-[(2R)-1-methylpyrrolidin-2-yl]pyridin-2-ol
5-(N-methyl-4,5-dihydro-1H-pyrrol-2-yl)pyridin-2-ol = 6-hydroxy-N-methylmyosmine
1-(6-hydroxypyridin-3-yl)-4-(methylamino)butan-1-one = 6-hydroxypseudooxynicotine
Other name(s): D-6-hydroxynicotine oxidase; 6-hydroxy-D-nicotine oxidase
Systematic name: (R)-6-hydroxynicotine:oxygen oxidoreductase
Comments: A flavoprotein (FAD). The enzyme, which participates in nicotine degradation, is specific for (R) isomer of 6-hydroxynicotine, derived from the uncommon (R)-nicotine. The bacterium Arthrobacter nicotinovorans, in which this enzyme was originally discovered, has a different enzyme that catalyses a similar reaction with the (S)-isomer (cf. EC 18.104.22.168, (S)-6-hydroxynicotine oxidase).
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, UM-BBD, CAS registry number: 37233-46-8
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