Aliases for GALNT4 Gene
- Polypeptide N-Acetylgalactosaminyltransferase 4 2 3 4 5
- Polypeptide GalNAc Transferase 4 2 3 4
- UDP-N-Acetyl-Alpha-D-Galactosamine:Polypeptide N-Acetylgalactosaminyltransferase 4 (GalNAc-T4) 2 3
- UDP-GalNAc:Polypeptide N-Acetylgalactosaminyltransferase 4 3 4
- Protein-UDP Acetylgalactosaminyltransferase 4 3 4
External Ids for GALNT4 Gene
Previous GeneCards Identifiers for GALNT4 Gene
This gene encodes a member of the UDP-N-acetyl-alpha-D-galactosamine:polypeptide N-acetylgalactosaminyltransferase (GalNAc-T) family of enzymes. GalNAc-Ts initiate mucin-type O-linked glycosylation in the Golgi apparatus by catalyzing the transfer of GalNAc to serine and threonine residues on target proteins. They are characterized by an N-terminal transmembrane domain, a stem region, a lumenal catalytic domain containing a GT1 motif and Gal/GalNAc transferase motif, and a C-terminal ricin/lectin-like domain. GalNAc-Ts have different, but overlapping, substrate specificities and patterns of expression. In vitro, the encoded protein can complement other GalNAc-Ts in the complete O-glycosylation of the mucin-1 tandem repeat and can O-glycosylate the P-selectin glycoprotein ligand-1 molecule. The coding region of this gene is contained within a single exon. Fusion transcripts, which combine part of this gene with the 5' exons of the neighboring POC1B (POC1 centriolar protein homolog B) gene, also exist. [provided by RefSeq, Dec 2010]
GeneCards Summary for GALNT4 Gene
GALNT4 (Polypeptide N-Acetylgalactosaminyltransferase 4) is a Protein Coding gene. Diseases associated with GALNT4 include Nephrotic Syndrome, Type 3 and Corneal Dystrophy, Posterior Amorphous. Among its related pathways are O-linked glycosylation and Metabolism of proteins. Gene Ontology (GO) annotations related to this gene include carbohydrate binding and polypeptide N-acetylgalactosaminyltransferase activity. An important paralog of this gene is POC1B-GALNT4.
UniProtKB/Swiss-Prot Summary for GALNT4 Gene
Catalyzes the initial reaction in O-linked oligosaccharide biosynthesis, the transfer of an N-acetyl-D-galactosamine residue to a serine or threonine residue on the protein receptor. Has a highest activity toward Muc7, EA2 and Muc2, with a lowest activity than GALNT2. Glycosylates 'Thr-57' of SELPLG.