View source for Dolichyl-phosphate-mannose-protein mannosyltransferase

{{enzyme
| Name = flavonol-3-O-glycoside xylosyltransferase
| EC_number = 2.4.2.35
| CAS_number = 83380-90-9
| IUBMB_EC_number = 2/4/2/35
| GO_code = 0047285
| image = 
| width = 
| caption = 
}}
In [[enzymology]], a '''flavonol-3-O-glycoside xylosyltransferase''' ({{EC number|2.4.2.35}}) is an [[enzyme]] that [[catalysis|catalyzes]] the [[chemical reaction]]

:UDP-D-xylose + a flavonol 3-O-glycoside <math>\rightleftharpoons</math> UDP + a flavonol 3-[-D-xylosyl-(1->2)-beta-D-glycoside]

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

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

==References==
{{reflist|1}}
* {{cite journal | author = Wiermann R | date = 1982 | title = 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 | journal = Z. Natursforsch. C: Biosci.  | volume = 37 | pages = 587&ndash;599 }}
* {{cite journal | author = Ishikura N and Yang ZQ | date = 1991 | title = UDP-D-xylose: flavonol 3-O-xylosyltransferase from young leaves of Euonymus alatus f. ciliato-dentatus | journal = Z. Naturforsch. C: Biosci.  | volume = 46 | pages = 1003&ndash;1010 }}

{{enzyme-stub}}

[[Category:EC 2.4.2]]
[[Category:Enzymes of unknown structure]]