Reaction: UDP-α-D-xylose + a flavonol 3-O-glycoside = UDP + a flavonol 3-[β-D-xylosyl-(1→2)-β-D-glycoside]
For diagram of reaction click here.
Other name(s): UDP-D-xylose:flavonol-3-O-glycoside 2''-O-β-D-xylosyltransferase
Systematic name: UDP-α-D-xylose:flavonol-3-O-glycoside 2''-O-β-D-xylosyltransferase
Comments: Flavonol 3-O-glucoside, flavonol 3-O-galactoside and, more slowly, rutin, can act as acceptors.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number: 83380-90-9
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.