KEGG   ENZYME: 2.4.2.56Help
Entry
EC 2.4.2.56                 Enzyme                                 

Name
kaempferol 3-O-xylosyltransferase;
F3XT;
UDP-D-xylose:flavonol 3-O-xylosyltransferase;
flavonol 3-O-xylosyltransferase
Class
Transferases;
Glycosyltransferases;
Pentosyltransferases
BRITE hierarchy
Sysname
UDP-alpha-D-xylose:kaempferol 3-O-D-xylosyltransferase
Reaction(IUBMB)
UDP-alpha-D-xylose + kaempferol = UDP + kaempferol 3-O-beta-D-xyloside [RN:R10609]
Reaction(KEGG)
Substrate
UDP-alpha-D-xylose [CPD:C00190];
kaempferol [CPD:C05903]
Product
UDP [CPD:C00015];
kaempferol 3-O-beta-D-xyloside [CPD:C20727]
Comment
The enzyme from the plant Euonymus alatus also catalyses the 3-O-D-xylosylation of other flavonols (e.g. quercetin, isorhamnetin, rhamnetin, myricetin, fisetin) with lower activity.
History
EC 2.4.2.56 created 2013
Reference
1
  Authors
Ishikura, N. and Yang, Z.Q.
  Title
UDP-D-xylose: flavonol 3-O-xylosyltransferase from young leaves of Euonymus alatus f. ciliato-dentatus.
  Journal
Z. Naturforsch. C: Biosci. 46 (1991) 1003-1010.
Other DBs
ExplorEnz - The Enzyme Database: 
IUBMB Enzyme Nomenclature: 
ExPASy - ENZYME nomenclature database: 
BRENDA, the Enzyme Database: 

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