IUBMB Enzyme Nomenclature


Accepted name: demethylrebeccamycin-D-glucose O-methyltransferase

Reaction: 4'-demethylrebeccamycin + S-adenosyl-L-methionine = rebeccamycin + S-adenosyl-L-homocysteine

For diagram of reaction click here

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].

Links to other databases: BRENDA, EXPASY, KEGG, PDB, Metacyc, PDB, CAS registry number:


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 created 2010]

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