Reaction: (+)-exo-β-bergamotene + 2 [reduced NADPH—hemoprotein reductase] + 3 O2 = 5-dehydro-6-demethoxyfumagillol + 2 [oxidized NADPH—hemoprotein reductase] + 3 H2O (overall reaction)
(1a) (+)-exo-β-bergamotene + [reduced NADPH—hemoprotein reductase] + O2 = (5R)-hydroxy-(+)-exo-β-bergamotene + [oxidized NADPH—hemoprotein reductase] + H2O
(1b) (5R)-hydroxy-(+)-exo-β-bergamotene + O2 = (3S)-3-[2-methyl-3-(3-methylbut-2-en-1-yl)oxiran-2-yl]-4-methylidenecyclohexan-1-one + H2O
(1c) (3S)-3-[2-methyl-3-(3-methylbut-2-en-1-yl)oxiran-2-yl]-4-methylidenecyclohexan-1-one + [reduced NADPH—hemoprotein reductase] + O2 = 5-dehydro-6-demethoxyfumagillol + [oxidized NADPH—hemoprotein reductase] + H2O
For diagram of reaction click here and mechanism click here
Glossary: (+)-exo-β-bergamotene = β-trans-bergamotene = (1S,5S,6R)-6-methyl-2-methylidene-6-(4-methylpent-3-enyl)bicyclo[3.1.1]heptane
fumagillol = (3R,4S,5S,6R)-5-methoxy-4-[(2R,3R)-2-methyl-3-(3-methylbut-2-en-1-yl)oxiran-2-yl]-1-oxaspiro[2.5]octan-6-ol
fumagillin = (2E,4E,6E,8E)-10-({(3R,4S,5S,6R)-5-methoxy-4-[(2R,3R)-2-methyl-3-(3-methylbut-2-en-1-yl)oxiran-2-yl]-1-oxaspiro[2.5]oct-6-yl}oxy)-10-oxodeca-2,4,6,8-tetraenoate
Other name(s): fumagillin multifunctional cytochrome P450 monooxygenase; Fma-P450; fmaG (gene name)
Systematic name: (+)-exo-β-bergamotene,[reduced NADPH—hemoprotein reductase] oxidoreductase (5-dehydro-6-demethoxyfumagillol-producing)
Comments: The enzyme, characterized from the mold Aspergillus fumigatus, catalyses a complex transformation comprising hydroxylation, bicyclic ring-opening, and two epoxidations, generating the sesquiterpenoid core skeleton of fumagillin.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number:
References:
1. Lin, H.C., Tsunematsu, Y., Dhingra, S., Xu, W., Fukutomi, M., Chooi, Y.H., Cane, D.E., Calvo, A.M., Watanabe, K. and Tang, Y. Generation of complexity in fungal terpene biosynthesis: discovery of a multifunctional cytochrome P450 in the fumagillin pathway. J. Am. Chem. Soc. 136 (2014) 4426-4436. [PMID: 24568283]