polypeptide N-acetylgalactosaminyltransferase activity
Catalysis of the reaction: UDP-N-acetyl-D-galactosamine + polypeptide = UDP + N-acetyl-D-galactosaminyl-polypeptide. This reaction is the modification of serine or threonine residues in polypeptide chains by the transfer of a N-acetylgalactose from UDP-N-acetylgalactose to the hydroxyl group of the amino acid; it is the first step in O-glycan biosynthesis.
GO:0008376
acetylgalactosaminyltransferase activity
is_a
GO:0140096
catalytic activity, acting on a protein
is_a
UDP-GalNAc:polypeptide N-acetylgalactosaminyl transferase activity
related
UDP-GalNAc:polypeptide N-acetylgalactosaminyltransferase activity
related
UDP-N-acetyl-D-galactosamine:polypeptide N-acetylgalactosaminyl-transferase activity
related
UDP-N-acetyl-alpha-D-galactosamine:polypeptide N-acetylgalactosaminyltransferase activity
related
UDP-N-acetylgalactosamine-glycoprotein N-acetylgalactosaminyltransferase activity
related
UDP-N-acetylgalactosamine-protein N-acetylgalactosaminyltransferase activity
related
UDP-N-acetylgalactosamine:kappa-casein polypeptide N-acetylgalactosaminyltransferase activity
related
UDP-N-acetylgalactosamine:polypeptide N-acetylgalactosaminyltransferase activity
related
UDP-N-acetylgalactosamine:protein N-acetylgalactosaminyl transferase activity
related
UDP-acetylgalactosamine-glycoprotein acetylgalactosaminyltransferase activity
related
UDP-acetylgalactosamine:peptide-N-galactosaminyltransferase activity
related
glycoprotein acetylgalactosaminyltransferase activity
related
polypeptide-N-acetylgalactosamine transferase activity
related
protein-UDP acetylgalactosaminyltransferase activity
related
uridine diphosphoacetylgalactosamine-glycoprotein acetylgalactosaminyltransferase activity
related