Biology:Glycoprotein-N-acetylgalactosamine 3-beta-galactosyltransferase

From HandWiki
Short description: Class of enzymes
glycoprotein-N-acetylgalactosamine 3-beta-galactosyltransferase
Identifiers
EC number2.4.1.122
CAS number97089-61-7
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum
Gene OntologyAmiGO / QuickGO

In enzymology, a glycoprotein-N-acetylgalactosamine 3-beta-galactosyltransferase (EC 2.4.1.122) is an enzyme that catalyzes the chemical reaction

UDP-galactose + glycoprotein N-acetyl-D-galactosamine [math]\displaystyle{ \rightleftharpoons }[/math] UDP + glycoprotein D-galactosyl-1,3-N-acetyl-D-galactosamine

Thus, the two substrates of this enzyme are UDP-galactose and glycoprotein N-acetyl-D-galactosamine, whereas its two products are UDP and glycoprotein D-galactosyl-1,3-N-acetyl-D-galactosamine.

This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is UDP-galactose:glycoprotein-N-acetyl-D-galactosamine 3-beta-D-galactosyltransferase. This enzyme is also called uridine diphosphogalactose-mucin beta-(1->3)-galactosyltransferase. This enzyme participates in o-glycan biosynthesis and glycan structures - biosynthesis 1.

See also

References

  • "Identification of the product formed by human erythrocyte galactosyltransferase". Biochim. Biophys. Acta 659 (2): 302–11. 1981. doi:10.1016/0005-2744(81)90056-5. PMID 6789880. 
  • "Purification and properties of UDP-gal:N-acetylgalactosaminide mucin: beta 1,3-galactosyltransferase from swine trachea mucosa". J. Biol. Chem. 257 (7): 3987–94. 1982. PMID 6801057. 
  • "Glycosyltransferases involved in elongation of N-glycosidically linked oligosaccharides of the complex or N-acetyllactosamine type". Methods Enzymol. 98: 98–134. 1983. doi:10.1016/0076-6879(83)98143-0. PMID 6366476.