Monocyclic monoterpene ketone monooxygenase

Monocyclic monoterpene ketone monooxygenase (EC 1.14.13.105, 1-hydroxy-2-oxolimonene 1,2-monooxygenase, dihydrocarvone 1,2-monooxygenase, MMKMO) is an enzyme with systematic name (-)-menthone,NADPH:oxygen oxidoreductase.^[1][2][3] This enzyme catalyses the following chemical reaction

(1) (-)-menthone + NADPH + H⁺ + O₂ ${\displaystyle \rightleftharpoons }$ (4R,7S)-7-isopropyl-4-methyloxepan-2-one + NADP⁺ + H₂O

(2) dihydrocarvone + NADPH + H⁺ + O² ${\displaystyle \rightleftharpoons }$ 4-isopropenyl-7-methyloxepan-2-one + NADP⁺ + H₂O

(3) (iso)-dihydrocarvone + NADPH + H⁺ + O₂ ${\displaystyle \rightleftharpoons }$ 6-isopropenyl-3-methyloxepan-2-one + NADP⁺ + H₂O

(4a) 1-hydroxymenth-8-en-2-one + NADPH + H⁺ + O₂ ${\displaystyle \rightleftharpoons }$ 7-hydroxy-4-isopropenyl-7-methyloxepan-2-one + NADP⁺ + H₂O

(4b) 7-hydroxy-4-isopropenyl-7-methyloxepan-2-one ${\displaystyle \rightleftharpoons }$ 3-isopropenyl-6-oxoheptanoate (spontaneous)

Monocyclic monoterpene ketone monooxygenase
Identifiers
EC no.	1.14.13.105
Databases
IntEnz	IntEnz view
BRENDA	BRENDA entry
ExPASy	NiceZyme view
KEGG	KEGG entry
MetaCyc	metabolic pathway
PRIAM	profile
PDB structures	RCSB PDB PDBe PDBsum
Search PMC articles PubMed articles NCBI proteins

Monocyclic monoterpene ketone monooxygenase is a flavoprotein (FAD).