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6)-β-D-glucoside]
Reaction: UDP-L-rhamnose + a flavonol 3-O-D-glucoside = UDP + a flavonol 3-O-[β-L-rhamnosyl-(16)-β-D-glucoside]
For diagram click here.
Other name(s): uridine diphosphorhamnose-flavonol 3-O-glucoside rhamnosyltransferase; UDP-rhamnose:flavonol 3-O-glucoside rhamnosyltransferase
Systematic name: UDP-L-rhamnose:flavonol-3-O-D-glucoside 6"-O-L-rhamnosyltransferase
Comments: Converts flavonol 3-O-glucosides to 3-O-rutinosides. Also acts, more slowly, on rutin, quercetin 3-O-galactoside and flavonol 3-O-rhamnosides.
Links to other databases: BRENDA, EXPASY, KEGG, CAS registry number: 83380-89-6
References:
1. Kleinehollenhorst, G., Behrens, H., Pegels, G., Srunk, N. and Wiermann, R. Formation of flavonol 3-O-diglycosides and flavonol 3-O-triglycosides by enzyme extracts from anthers of tulipa cv apeldoorn - characterization and activity of 3 different o-glycosyltransferases during anther development. Z. Natursforsch. C: Biosci. 37 (1982) 587-599.
2. Jones, P., Messner, B., Nakajima, J., Schaffner, A.R. and Saito, K. UGT73C6 and UGT78D1, glycosyltransferases involved in flavonol glycoside biosynthesis in Arabidopsis thaliana. J. Biol. Chem. 278 (2003) 43910-43918. [PMID: 12900416]