Reaction: UDP-α-D-galactose + N-acetyl-α-D-galactosaminyl-R = UDP + β-D-galactosyl-(1→3)-N-acetyl-α-D-galactosaminyl-R
Other name(s): glycoprotein-N-acetylgalactosamine 3-β-galactosyltransferase; uridine diphosphogalactose-mucin β-(1→3)-galactosyltransferase; UDP-galactose:glycoprotein-N-acetyl-D-galactosamine 3-β-D-galactosyltransferase; UDP-Gal:α-D-GalNAc-1,3-α-D-GalNAc-diphosphoundecaprenol β-1,3-galactosyltransferase; wbnJ (gene name); wbiP (gene name); C1GALT1 (gene name); UDP-α-D-galactose:glycoprotein-N-acetyl-D-galactosamine 3-β-D-galactosyltransferase
Systematic name: UDP-α-D-galactose:N-acetyl-α-D-galactosaminyl-R β-1,3-galactosyltransferase (configuration-inverting)
Comments: The eukaryotic enzyme can act on non-reducing O-serine-linked N-acetylgalactosamine residues in mucin glycoproteins, forming the T-antigen. The bacterial enzyme, found in some pathogenic strains, is involved in biosynthesis of the O-antigen repeating unit.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number: 97089-61-7
References:
1. Hesford, F.J., Berger, E.G. and van den Eijnden, D.H. Identification of the product formed by human erythrocyte galactosyltransferase. Biochim. Biophys. Acta 659 (1981) 302-311. [PMID: 6789880]
2. Mendicino, J., Sivakami, S., Davila, M. and Chandrasekaran, E.V. Purification and properties of UDP-gal:N-acetylgalactosaminide mucin:β1,3-galactosyltransferase from swine trachea mucosa. J. Biol. Chem. 257 (1982) 3987-3994. [PMID: 6801057]
3. Schachter, H., Narasimhan, S., Gleeson, P. and Vella, G. Glycosyltransferases involved in elongation of N-glycosidically linked oligosaccharides of the complex or N-acetyllactosamine type. Methods Enzymol. 98 (1983) 98-134. [PMID: 6366476]
4. Ju, T., Brewer, K., D'Souza, A., Cummings, R.D. and Canfield, W.M. Cloning and expression of human core 1 β1,3-galactosyltransferase. J. Biol. Chem. 277 (2002) 178-186. [PMID: 11677243]
5. Yi, W., Perali, R.S., Eguchi, H., Motari, E., Woodward, R. and Wang, P.G. Characterization of a bacterial β-1,3-galactosyltransferase with application in the synthesis of tumor-associated T-antigen mimics. Biochemistry 47 (2008) 1241-1248. [PMID: 18179256]
6. Woodward, R., Yi, W., Li, L., Zhao, G., Eguchi, H., Sridhar, P.R., Guo, H., Song, J.K., Motari, E., Cai, L., Kelleher, P., Liu, X., Han, W., Zhang, W., Ding, Y., Li, M. and Wang, P.G. In vitro bacterial polysaccharide biosynthesis: defining the functions of Wzy and Wzz. Nat. Chem. Biol. 6 (2010) 418-423. [PMID: 20418877]