Biology:Flavonol-3-O-glucoside L-rhamnosyltransferase
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Short description: Class of enzymes
| flavonol-3-O-glucoside L-rhamnosyltransferase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC number | 2.4.1.159 | ||||||||
| CAS number | 83380-89-6 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| Gene Ontology | AmiGO / QuickGO | ||||||||
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In enzymology, a flavonol-3-O-glucoside L-rhamnosyltransferase (EC 2.4.1.159) is an enzyme that catalyzes the chemical reaction
- UDP-L-rhamnose + a flavonol 3-O-D-glucoside [math]\displaystyle{ \rightleftharpoons }[/math] UDP + a flavonol 3-O-[beta-L-rhamnosyl-(1->6)-beta-D-glucoside]
Thus, the two substrates of this enzyme are UDP-L-rhamnose and flavonol 3-O-D-glucoside, whereas its two products are UDP and flavonol 3-O-[beta-L-rhamnosyl-(1->6)-beta-D-glucoside].
This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is UDP-L-rhamnose:flavonol-3-O-D-glucoside 6''-O-L-rhamnosyltransferase. Other names in common use include uridine diphosphorhamnose-flavonol 3-O-glucoside, rhamnosyltransferase, and UDP-rhamnose:flavonol 3-O-glucoside rhamnosyltransferase. This enzyme participates in flavonoid biosynthesis.
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.
- "UGT73C6 and UGT78D1, glycosyltransferases involved in flavonol glycoside biosynthesis in Arabidopsis thaliana". J. Biol. Chem. 278 (45): 43910–8. 2003. doi:10.1074/jbc.M303523200. PMID 12900416.
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