ID   2.4.1.147
DE   acetylgalactosaminyl-O-glycosyl-glycoprotein beta-1,3-N-
DE   acetylglucosaminyltransferase.
AN   Core 3beta-GlcNAc-transferase.
AN   O-glycosyl-oligosaccharide-glycoprotein N-acetylglucosaminyltransferase
AN   III.
CA   (1) 3-O-[N-acetyl-alpha-D-galactosaminyl]-L-threonyl-[protein] + UDP-N-
CA   acetyl-alpha-D-glucosamine = 3-O-[N-acetyl-beta-D-glucosaminyl-(1->3)-N-
CA   acetyl-alpha-D-galactosaminyl]-L-threonyl-[protein] + H(+) + UDP.
CA   (2) 3-O-[N-acetyl-alpha-D-galactosaminyl]-L-seryl-[protein] + UDP-N-
CA   acetyl-alpha-D-glucosamine = 3-O-[N-acetyl-beta-D-glucosaminyl-(1->3)-N-
CA   acetyl-alpha-D-galactosaminyl]-L-seryl-[protein] + H(+) + UDP.
CC   -!- The product of the enzyme is known as core 3, one of the eight core
CC       structures of mucin-type O-glycans.
CC   -!- O-Linked glycans are polysaccharides or oligosaccharides that are
CC       linked to a protein via the oxygen atom in the side chain of an
CC       L-serine or L-threonine residue.
DR   Q6ZMB0, B3GN6_HUMAN;  Q3USF0, B3GN6_MOUSE;
//