Beta-1,3-N-acetylglucosaminyltransferase 8 (B3GNT8)

Beta-1,3-N-acetylglucosaminyltransferase 8 (B3GNT8) is a member of the beta-1,3-N-acetylglucosaminyltransferase family and encodes an enzyme responsible for catalyzing the transfer of N-acetylglucosamine (GlcNAc) in a beta-1,3 linkage to galactose residues, specifically elongating poly-N-acetyllactosamine structures on glycoproteins and glycolipids[1][7][8][9][10]. The enzyme localizes mainly to the Golgi apparatus and is involved in the biosynthesis of multiantennary N-glycans and O-linked glycosylation of mucins[1]. It plays a functional role in modifying glycan structures that can impact protein stability, trafficking, and cellular signaling[6][8]. Genetic mutations in B3GNT8 are associated with congenital skeletal disorders such as Desbuquois dysplasia and spondyloepimetaphyseal dysplasia with joint laxity, type 1, indicating its relevance in development and connective tissue biology[1][10]. B3GNT8 is less catalytically active compared to related family members such as B3GNT2, and little is currently known about small molecule inhibitors or therapeutics directly targeting it[2].

Other names

UDP-GlcNAc:betaGal beta-1,3-N-acetylglucosaminyltransferase 8B3GNT8BGnT-8Beta3Gn-T8Beta-1,3-N-acetylglucosaminyltransferase 8beta3Gn-T8