Rabbit anti-Human GALNT4 Polyclonal Antibody

Uniprot Id

Q8N4A0

Target Species

Human

Target Name

GALNT4

Target Full Name

Polypeptide N-acetylgalactosaminyltransferase 4

Target Function

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.

Target Subcellular Location

Golgi apparatus membrane; Single-pass type II membrane protein.

Target Protein Families

Glycosyltransferase 2 family, GalNAc-T subfamily

Target Tissue Specificity

Ubiquitous. Highly expressed in mucous cells.

Target Synonyms

EC 2.4.1.41; GALNAC T4 ; GalNAc transferase 4; GalNAc-T4; GalNAcT4; GALNT4; GALT4_HUMAN; N-acetylgalactosaminyltransferase 4 (GalNAc-T4); Polypeptide GalNAc transferase 4; Polypeptide N-acetylgalactosaminyltransferase 4; pp GaNTase 4; pp-GaNTase 4; Protein UDP acetylgalactosaminyltransferase 4; Protein-UDP acetylgalactosaminyltransferase 4; UDP GalNAc:polypeptide N-acetylgalactosaminyltransferase 4; UDP-GalNAc:polypeptide N-acetylgalactosaminyltransferase 4; UDP-N-acetyl-alpha-D-galactosamine:polypeptide

Target Background

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.