EC - Globotriaosylceramide 3-β-N-acetylgalactosaminyltransferase

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IntEnz Enzyme Nomenclature


Accepted name:
globotriaosylceramide 3-β-N-acetylgalactosaminyltransferase
Other names:
globoside synthetase
uridine diphosphoacetylgalactosamine-galactosylgalactosylglucosylceramide acetylgalactosaminyltransferase
galactosylgalactosylglucosylceramide β-D-acetylgalactosaminyltransferase
UDP-N-acetylgalactosamine:globotriaosylceramide β1,3-N-acetylgalactosaminyltransferase
globoside synthase
UDP-N-acetyl-D-galactosamine:D-galactosyl-1,4-D-galactosyl-1,4-D-glucosylceramide β-N-acetyl-D-galactosaminyltransferase
UDP-N-acetylgalactosamine:globotriaosylceramide β-3-N-acetylgalactosaminyltransferase
UDP-N-acetyl-D-galactosamine:α-D-galactosyl-(1→4)-β-D-galactosyl-(1→4)-β-D-glucosylceramide 3III-β-N-acetyl-D-galactosaminyltransferase
UDP-N-acetyl-D-galactosamine:α-D-galactosyl-(1→4)-β-D-galactosyl-(1→4)-β-D-glucosyl-(1↔1)-ceramide 3III-β-N-acetyl-D-galactosaminyltransferase
UDP-N-acetyl-D-galactosamine:α-D-galactosyl-(1→4)-β-D-galactosyl-(1→4)-β-D-glucosyl-(1↔1)-ceramide III3-β-N-acetyl-D-galactosaminyltransferase
Systematic name:
UDP-N-acetyl-α-D-galactosamine:α-D-galactosyl-(1→4)-β-D-galactosyl-(1→4)-β-D-glucosyl-(1↔1)-ceramide III3-β-N-acetyl-D-galactosaminyltransferase




Globoside is a neutral glycosphingolipid in human erythrocytes and has blood-group-P-antigen activity [4]. The enzyme requires a divalent cation for activity, with Mn2+ required for maximal activity [3]. UDP-GalNAc is the only sugar donor that is used efficiently by the enzyme: UDP-Gal and UDP-GlcNAc result in very low enzyme activity [3]. Lactosylceramide, globoside and gangliosides GM3 and GD3 are not substrates [4]. For explanation of the superscripted '3' in the systematic name, see GL-5.3.4.

Links to other databases

Enzymes and pathways: NC-IUBMB , BRENDA , DIAGRAM , DIAGRAM , ExplorEnz , ENZYME@ExPASy , KEGG , MetaCyc , UniPathway
Structural data: CSA , EC2PDB
Gene Ontology: GO:0047273
CAS Registry Number: 62213-46-1


  1. Chien, J.-L., Williams, T. and Basu, S.
    Biosynthesis of a globoside-type glycosphingolipid by a β-N-acetylgalactosaminyltransferase from embryonic chicken brain.
    J. Biol. Chem. 248 : 1778-1785 (1973). [PMID: 4632917]
  2. Ishibashi, T., Kijimoto, S. and Makita, A.
    Biosynthesis of globoside and Forssman hapten from trihexosylceramide and properties of β-N-acetyl-galactosaminyltransferase of guinea pig kidney.
    Biochim. Biophys. Acta 337 : 92-106 (1974). [PMID: 4433547]
  3. Taniguchi, N. and Makita, A.
    Purification and characterization of UDP-N-acetylgalactosamine: globotriaosylceramide β-3-N-acetylgalactosaminyltransferase, a synthase of human blood group P antigen, from canine spleen.
    J. Biol. Chem. 259 : 5637-5642 (1984). [PMID: 6425294]
  4. Okajima, T., Nakamura, Y., Uchikawa, M., Haslam, D.B., Numata, S.I., Furukawa, K., Urano, T. and Furukawa, K.
    Expression cloning of human globoside synthase cDNAs. Identification of β3Gal-T3 as UDP-N-acetylgalactosamine:globotriaosylceramide β1,3-N-acetylgalactosaminyltransferase.
    J. Biol. Chem. 275 : 40498-40503 (2000). [PMID: 10993897]

[EC created 1976, modified 2006]