Glucuronylgalactosylproteoglycan 4-b-N-acetylgalactosaminyltransferase

Glucuronylgalactosylproteoglycan 4-beta-N-acetylgalactosaminyltransferase (EC 2.4.1.174, N-acetylgalactosaminyltransferase I, glucuronylgalactosylproteoglycan beta-1,4-N-acetylgalactosaminyltransferase, uridine diphosphoacetylgalactosamine-chondroitin acetylgalactosaminyltransferase I, UDP-N-acetyl-D-galactosamine:D-glucuronyl-1,3-beta-D-galactosyl-proteoglycan beta-1,4-N-acetylgalactosaminyltransferase) is an enzyme with systematic name UDP-N-acetyl-D-galactosamine:D-glucuronyl-(1->3)-beta-D-galactosyl-proteoglycan 4-beta-N-acetylgalactosaminyltransferase.[1][2] This enzyme catalyses the following chemical reaction

UDP-N-acetyl-D-galactosamine + beta-D-glucuronyl-(1->3)-D-galactosyl-proteoglycan UDP + N-acetyl-D-galactosaminyl-(1->4)-beta-D-glucuronyl-(1->3)-beta-D-galactosylproteoglycan
Glucuronylgalactosylproteoglycan 4-beta-N-acetylgalactosaminyltransferase
Identifiers
EC number2.4.1.174
CAS number96189-39-8
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum

This enzyme requires Mn2+.

References
  1. Rohrmann K, Niemann R, Buddecke E (May 1985). "Two N-acetylgalactosaminyltransferase are involved in the biosynthesis of chondroitin sulfate". European Journal of Biochemistry. 148 (3): 463–9. doi:10.1111/j.1432-1033.1985.tb08862.x. PMID 3922754.
  2. Uyama T, Kitagawa H, Tamura Ji J, Sugahara K (March 2002). "Molecular cloning and expression of human chondroitin N-acetylgalactosaminyltransferase: the key enzyme for chain initiation and elongation of chondroitin/dermatan sulfate on the protein linkage region tetrasaccharide shared by heparin/heparan sulfate". The Journal of Biological Chemistry. 277 (11): 8841–6. doi:10.1074/jbc.M111434200. PMID 11788602.
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