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Official Full Name: polypeptide N-acetylgalactosaminyltransferase 3
Also known as: HHS; HFTC; HFTC1; GalNAc-T3
This gene encodes UDP-GalNAc transferase 3, a member of the galnac transferase family. This family transfers N-acetylgalactosamine to the hydroxyl groups of serine or threonine residues in the first step of O-linked oligosaccharide biosynthesis. Individual galnac transferases have different activities, and initiation of O-glycosylation is regulated by a series of galnac transferases. The protein encoded by this gene is highly homologous to other family members, but the enzymes have different substrate specificities.