Flavonol-3-O-glycoside xylosyltransferase explained

flavonol-3-O-glycoside xylosyltransferase
Ec Number:	2.4.2.35
Cas Number:	83380-90-9
Go Code:	0047285

In enzymology, a flavonol-3-O-glycoside xylosyltransferase is an enzyme that catalyzes the chemical reaction

UDP-D-xylose + a flavonol 3-O-glycoside

\rightleftharpoons UDP + a flavonol 3-[-D-xylosyl-(1->2)-beta-D-glycoside]

Thus, the two substrates of this enzyme are UDP-D-xylose and flavonol 3-O-glycoside, whereas its two products are UDP and flavonol 3-[-D-xylosyl-(1->2)-beta-D-glycoside].

This enzyme belongs to the family of glycosyltransferases, specifically the pentosyltransferases. The systematic name of this enzyme class is UDP-D-xylose:flavonol-3-O-glycoside 2''-O-beta-D-xylosyltransferase.

References

• Wiermann R . 1982 . 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. Naturforsch. C . 37 . 587 - 599 .
• Ishikura N, Yang ZQ . 1991 . UDP-D-xylose: flavonol 3-O-xylosyltransferase from young leaves of Euonymus alatus f. ciliato-dentatus . Z. Naturforsch. C: Biosci. . 46 . 1003 - 1010 .