ID 2.4.1.376 DE EGF-domain serine glucosyltransferase. CA L-seryl-[EGF-like domain protein] + UDP-alpha-D-glucose = 3-O-(beta-D- CA glucosyl)-L-seryl-[EGF-like domain protein] + H(+) + UDP. CC -!- The enzyme, found in animals and insects, is involved in the CC biosynthesis of the alpha-D-xylosyl-(1->3)-alpha-D-xylosyl-(1->3)- CC beta-D-glucosyl trisaccharide on epidermal growth factor-like (EGF- CC like) domains. CC -!- Glycosylation takes place at the serine in the C-X-S-X-P-C motif. CC -!- The enzyme is bifunctional also being active with UDP-alpha-xylose as CC donor (EC 2.4.2.63). CC -!- When present on Notch proteins, the trisaccharide functions as a CC modulator of the signaling activity of this protein. DR Q5E9Q1, PGLT1_BOVIN; Q8NBL1, PGLT1_HUMAN; Q8BYB9, PGLT1_MOUSE; DR G3V9D0, PGLT1_RAT ; //