IUBMB Enzyme Nomenclature


Accepted name: anthocyanidin 3-O-glucoside 2''-O-glucosyltransferase

Reaction: UDP-α-D-glucose + an anthocyanidin 3-O-β-D-glucoside = UDP + an anthocyanidin 3-O-sophoroside

For diagram of reaction click here.

Glossary: anthocyanidin 3-O-sophoroside = anthocyanidin 3-O-(β-D-glucosyl(1→2)-β-D-glucoside)

Other name(s): 3GGT

Systematic name: UDP-α-D-glucose:anthocyanidin-3-O-glucoside 2''-O-glucosyltransferase

Comments: Isolated from Ipomoea nil (Japanese morning glory).

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


1. Morita, Y., Hoshino, A., Kikuchi, Y., Okuhara, H., Ono, E., Tanaka, Y., Fukui, Y., Saito, N., Nitasaka, E., Noguchi, H. and Iida, S. Japanese morning glory dusky mutants displaying reddish-brown or purplish-gray flowers are deficient in a novel glycosylation enzyme for anthocyanin biosynthesis, UDP-glucose:anthocyanidin 3-O-glucoside-2''-O-glucosyltransferase, due to 4-bp insertions in the gene. Plant J. 42 (2005) 353-363. [PMID: 15842621]

[EC created 2013]

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