Products

Western Blot

Entrez GeneID

GeneBank Accession#

Protein Accession#

Gene Name

B4GALT7

Gene Alias

B4GAL-T7, XGALT-1, XGALT1, XGPT1, beta4Gal-T7

Gene Description

xylosylprotein beta 1,4-galactosyltransferase, polypeptide 7 (galactosyltransferase I)

Omim ID

Gene Ontology

Gene Summary

This gene is one of seven beta-1,4-galactosyltransferase (beta4GalT) genes. They encode type II membrane-bound glycoproteins that appear to have exclusive specificity for the donor substrate UDP-galactose; all transfer galactose in a beta1,4 linkage to similar acceptor sugars: GlcNAc, Glc, and Xyl. Each beta4GalT has a distinct function in the biosynthesis of different glycoconjugates and saccharide structures. As type II membrane proteins, they have an N-terminal hydrophobic signal sequence that directs the protein to the Golgi apparatus and which then remains uncleaved to function as a transmembrane anchor. By sequence similarity, the beta4GalTs form four groups: beta4GalT1 and beta4GalT2, beta4GalT3 and beta4GalT4, beta4GalT5 and beta4GalT6, and beta4GalT7. The enzyme encoded by this gene attaches the first galactose in the common carbohydrate-protein (GlcA-beta1,3-Gal-beta1,3-Gal-beta1,4-Xyl-beta1-O-Ser) linkage found in proteoglycans. Manganese is required as a cofactor. This enzyme differs from the other six beta4GalTs because it lacks the conserved beta4GalT1-beta4GalT6 Cys residues and it is located in cis-Golgi instead of trans-Golgi. Two single-nucleotide mutations were identified from a patient with the progeroid type of Ehlers-Danlos syndrome. [provided by RefSeq

Other Designations

beta-1,4-galactosyltransferase 7|galactosyltransferase 1 (xylosylprotein 4-beta-galactosyltransferase)|xylosylprotein beta 1,4-galactosyltransferase 7