This gene encodes UDP-GalNAc transferase 3, a member of the GalNAc-transferases family. This family transfers an N-acetyl galactosamine to the hydroxyl group of a serine or threonine residue in the first step of O-linked oligosaccharide biosynthesis. Individual GalNAc-transferases have distinct activities and initiation of O-glycosylation is regulated by a repertoire of GalNAc-transferases. The protein encoded by this gene is highly homologous to other family members, however the enzymes have different substrate specificities. [provided by RefSeq, Jul 2008]
Forensic Context
A study in mice demonstrated that in vivo α-particle irradiation of Kupffer and endothelial liver cells induced a characteristic inflammatory state, with the GALNT3 (Galnt3) being commonly down-regulated by less than half in all irradiated groups compared to non-irradiated controls [Roudkenar et al. DOI:10.1269/jrr.07078]. This down-regulation was part of a broader gene expression profile distinct from chemical hepatotoxicants, characterized by the suppression of cytochrome P450s and the induction of Metallothionein 1 and Hemopexin.