EC	2.1.1.164
Accepted name:	demethylrebeccamycin-D-glucose O-methyltransferase
Reaction:	4′-demethylrebeccamycin + S-adenosyl-L-methionine = rebeccamycin + S-adenosyl-L-homocysteine
Other name(s):	RebM
Systematic name:	S-adenosyl-L-methionine:demethylrebeccamycin-D-glucose O-methyltransferase
Comments:	Catalyses the last step in the biosynthesis of rebeccamycin, an indolocarbazole alkaloid produced by the bacterium Lechevalieria aerocolonigenes. The enzyme is able to use a wide variety substrates, tolerating variation on the imide heterocycle, deoxygenation of the sugar moiety, and even indolocarbazole glycoside anomers [1]. The enzyme is a member of the general acid/base-dependent O-methyltransferase family [2].
References:	1.  Zhang, C., Albermann, C., Fu, X., Peters, N.R., Chisholm, J.D., Zhang, G., Gilbert, E.J., Wang, P.G., Van Vranken, D.L. and Thorson, J.S. RebG- and RebM-catalyzed indolocarbazole diversification. ChemBioChem 7 (2006) 795–804. [PMID: 16575939] 2.  Singh, S., McCoy, J.G., Zhang, C., Bingman, C.A., Phillips, G.N., Jr. and Thorson, J.S. Structure and mechanism of the rebeccamycin sugar 4′-O-methyltransferase RebM. J. Biol. Chem. 283 (2008) 22628–22636. [PMID: 18502766]
[EC 2.1.1.164 created 2010]