FEATURES

FAMILY

DESCRIPTION

Also known as GALT9_DROME, Pgant9. Catalyzes the initial reaction in O-linked oligosaccharide biosynthesis, the transfer of an N-acetyl-D-galactosamine residue to a serine or threonine residue on the protein receptor (PubMed:30158631). It can both act as a peptide transferase that transfers GalNAc onto unmodified peptide substrates, and as a glycopeptide transferase that requires the prior addition of a GalNAc on a peptide before adding additional GalNAc moieties (PubMed:30158631)., N-acetylgalactosaminyltransferase which preferentially O-glycosylates negatively charge substrates. O-glycosylates mucin-like protein Sgs3 in the salivary gland but to a lesser extent than isoform B. By regulating the O-glycosylation of secretory cargo proteins plays a role in the morphology and maturation of salivary gland secretory granules., N-acetylgalactosaminyltransferase which preferentially O-glycosylates positively charge substrates. O-glycosylates mucin-like protein Sgs3 in the salivary gland. By regulating the O-glycosylation of secretory cargo proteins, plays a role in the morphology and maturation of salivary gland secretory granules. Isoform A forms homotetramer. Isoform B forms homodimer.

EXTERNAL LINKS

Pgant9

Putative polypeptide N-acetylgalactosaminyltransferase 9

Pgant9

Molecular Synopsis