IUBMB Enzyme Nomenclature


Accepted name: validoxylamine A glucosyltransferase

Reaction: UDP-α-D-glucose + validoxylamine A = UDP + validamycin A

For diagram of reaction click here.

Glossary: validoxylamine A = (1S,2S,3R,6S)-4-(hydroxymethyl)-6-{[(1S,2S,3S,4R,5R)-2,3,4-trihydroxy-5-(hydroxymethyl)cyclohexyl]amino}cyclohex-4-ene-1,2,3-triol

Other name(s): vldK (gene name); valG (gene name)

Systematic name: UDP-α-D-glucose:validoxylamine-A D-glucosyltransferase

Comments: The enzyme, characterized from the bacterium Streptomyces hygroscopicus subsp. limoneus, catalyses the ultimate step in the biosynthesis of the antifungal agent validamycin A.

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


1. Bai, L., Li, L., Xu, H., Minagawa, K., Yu, Y., Zhang, Y., Zhou, X., Floss, H.G., Mahmud, T. and Deng, Z. Functional analysis of the validamycin biosynthetic gene cluster and engineered production of validoxylamine A. Chem. Biol. 13 (2006) 387-397. [PMID: 16632251]

2. Xu, H., Minagawa, K., Bai, L., Deng, Z. and Mahmud, T. Catalytic analysis of the validamycin glycosyltransferase (ValG) and enzymatic production of 4''-epi-validamycin A. J Nat Prod 71 (2008) 1233-1236. [PMID: 18563934]

[EC created 2016]

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