EC - Flavonol-3-O-glucoside L-rhamnosyltransferase

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IntEnz Enzyme Nomenclature


Accepted name:
flavonol-3-O-glucoside L-rhamnosyltransferase
Other names:
UDP-rhamnose:flavonol 3-O-glucoside rhamnosyltransferase
uridine diphosphorhamnose-flavonol 3-O-glucoside rhamnosyltransferase
UDP-L-rhamnose:flavonol-3-O-D-glucoside 6''-O-L-rhamnosyltransferase
Systematic name:
UDP-β-L-rhamnose:flavonol-3-O-β-D-glucoside 6''-O-L-rhamnosyltransferase (configuration-inverting)



A configuration-inverting rhamnosyltransferase that 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

Enzymes and pathways: NC-IUBMB , BRENDA , DIAGRAM , ExplorEnz , ENZYME@ExPASy , KEGG , MetaCyc , UniPathway
Structural data: CSA , EC2PDB
Gene Ontology: GO:0047230
CAS Registry Number: 83380-89-6


  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: 587-599 (1982).
  2. Jones, P., Messner, B., Nakajima, J.-I., Schäffner, A.R. and Saito, K.
    UGT73C6 and UGT78D1, glycosyltransferases involved in flavonol glycoside biosynthesis in Arabidopsis thaliana.
    J. Biol. Chem. 278: 43910-43918 (2003). [PMID: 12900416]

[EC created 1986, modified]