Transferred entry: monacolin L hydroxylase. Now EC, monacolin L hydroxylase
[EC created 2014, deleted 2018]
Accepted name: monacolin L hydroxylase
Reaction: monacolin L acid + O2 + [reduced NADPH—hemoprotein reductase] = monacolin J acid + [oxidized NADPH—hemoprotein reductase] + H2O
Glossary: monacolin L acid = (3R,5R)-7-[(1S,2S,6R,8aR)-2,6-dimethyl-1,2,6,7,8,8a-hexahydronaphthalen-1-yl]-3,5-dihydroxyheptanoic acid
monacolin J acid = (3R,5R)-7-[(1S,2S,6R,8S,8aR)-8-hydroxy-2,6-dimethyl-1,2,6,7,8,8a-hexahydronaphthalen-1-yl]-3,5-dihydroxyheptanoic acid
Other name(s): LovA (ambiguous)
Systematic name: monacolin L acid,[reduced NADPH—hemoprotein reductase]:oxygen oxidoreductase (8-hydroxylating)
Comments: A cytochrome P-450 (heme-thiolate) protein. The enzyme from fungi also catalyses the reaction of EC, dihydromonacolin L hydroxylase.
1.  Barriuso, J., Nguyen, D.T., Li, J.W., Roberts, J.N., MacNevin, G., Chaytor, J.L., Marcus, S.L., Vederas, J.C. and Ro, D.K. Double oxidation of the cyclic nonaketide dihydromonacolin L to monacolin J by a single cytochrome P450 monooxygenase, LovA. J. Am. Chem. Soc. 133 (2011) 8078–8081. [PMID: 21495633]
[EC created 2014 as EC, transferred 2018 to EC]
Accepted name: monacolin J acid methylbutanoate transferase
Reaction: monacolin J acid + (S)-2-methylbutanoyl-[2-methylbutanoate polyketide synthase] = lovastatin acid + [2-methylbutanoate polyketide synthase]
Glossary: monacolin J acid = (3R,5R)-7-[(1S,2S,6R,8S,8aR)-8-hydroxy-2,6-dimethyl-1,2,6,7,8,8a-hexahydronaphthalen-1-yl]-3,5-dihydroxyheptanoate
lovastatin acid = (3R,5R)-7-[(1S,2S,6R,8S,8aR)-2,6-dimethyl-8-{[(2S)-2-methylbutanoyl]oxy}-1,2,6,7,8,8a-hexahydronaphthalen-1-yl]-3,5-dihydroxyheptanoate
Other name(s): LovD
Systematic name: monacolin J acid:(S)-2-methylbutanoyl-[2-methylbutanoate polyketide synthase] (S)-2-methylbutanoate transferase
Comments: The enzyme catalyses the ultimate reaction in the lovastatin biosynthesis pathway of the filamentous fungus Aspergillus terreus.
1.  Kennedy, J., Auclair, K., Kendrew, S.G., Park, C., Vederas, J.C. and Hutchinson, C.R. Modulation of polyketide synthase activity by accessory proteins during lovastatin biosynthesis. Science 284 (1999) 1368–1372. [PMID: 10334994]
2.  Xie, X., Watanabe, K., Wojcicki, W.A., Wang, C.C. and Tang, Y. Biosynthesis of lovastatin analogs with a broadly specific acyltransferase. Chem. Biol. 13 (2006) 1161–1169. [PMID: 17113998]
3.  Xie, X., Meehan, M.J., Xu, W., Dorrestein, P.C. and Tang, Y. Acyltransferase mediated polyketide release from a fungal megasynthase. J. Am. Chem. Soc. 131 (2009) 8388–8389. [PMID: 19530726]
[EC created 2014]

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