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Information on EC - flavonol-3-O-glucoside glucosyltransferase

for references in articles please use BRENDA:EC2.4.1.239
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EC Tree
     2 Transferases
         2.4 Glycosyltransferases
             2.4.1 Hexosyltransferases
       flavonol-3-O-glucoside glucosyltransferase
IUBMB Comments
One of three specific glucosyltransferases in pea (Pisum sativum) that successively add a beta-D-glucosyl group first to O-3 of kaempferol, and then to O-2 of the previously added glucosyl group giving the 3-O-sophoroside and then the 3-O-sophorotrioside (see also EC, flavonol 3-O-glucosyltransferase and EC, flavonol-3-O-glycoside glucosyltransferase). TDP-glucose can replace UDP-glucose as the glucose donor but the reaction proceeds more slowly.
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The enzyme appears in viruses and cellular organisms
ugt79b30, more
UDP-glucose + a flavonol 3-O-beta-D-glucoside = UDP + a flavonol 3-O-beta-D-glucosyl-(1->2)-beta-D-glucoside
show the reaction diagram
Pisum sativum
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