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N-acetyl-beta-glucosaminyl-glycoprotein 4-beta-N-acetylgalactosaminyltransferase 1 (NGalNAc-T1, beta-1,4-N-acetylgalactosaminyltransferase 4, Beta4GalNAc-T4, Beta4GalNAcT4, B4GALNT4)
Function:
- transfers N-acetylgalactosamine (GalNAc) from UDP-GalNAc to N-acetylglucosamine-beta-benzyl with a beta-1,4-linkage to form N,N'-diacetyllactosediamine, GalNAc-beta-1,4-GlcNAc structures in N-linked glycans & probably O-linked glycans
UDP-N-acetyl-D-galactosamine + N-acetyl-beta-D-glucosaminyl group UDP + N-acetyl-beta-D-galactosaminyl-(1->4)-N-acetyl-beta-D- glucosaminyl group
Structure:
- belongs to the chondroitin N-acetylgalactosaminyltransferase family
Compartment: Golgi stack membrane
Expression:
- highly expressed in ovary, adult & fetal brain
- also expressed in fetal kidney & lung
General
beta-1,4-N-acetylgalactosaminyltransferase (B4GALNT)
glycoprotein
membrane protein
Properties
SIZE: MW = 117 kD
entity length = 1039 aa
COMPARTMENT: golgi
MOTIF: transmembrane domain {16-36}
N-glycosylation site {N105}
proline-rich region
SITE: 449-590
MOTIF: proline residue (SEVERAL)
Database Correlations
UniProt Q76KP1
Pfam PF07691
References
- UniProt :accession Q76KP1
- GlycoGene database
http://ggdb.muse.aist.go.jp/GGDB/index.jsp