ID   2.4.2.62
DE   xylosyl alpha-1,3-xylosyltransferase.
CA   3-O-[alpha-D-xylosyl-(1->3)-beta-D-glucosyl]-L-seryl-[EGF-like domain
CA   protein] + UDP-alpha-D-xylose = 3-O-[alpha-D-xylosyl-(1->3)-alpha-D-
CA   xylosyl-(1->3)-beta-D-glucosyl]-L-seryl-[EGF-like domain protein] + H(+)
CA   + 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   -!- When present on Notch proteins, the trisaccharide functions as a
CC       modulator of the signaling activity of this protein.
CC   -!- Formerly EC 2.4.2.n3.
DR   Q8NBI6, XXLT1_HUMAN;  Q3U4G3, XXLT1_MOUSE;
//