B4GALT3

beta-1,4-galactosyltransferase 3

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. This gene encodes an enzyme that may be mainly involved in the synthesis of the first N-acetyllactosamine unit of poly-N-acetyllactosamine chains. Multiple alternatively spliced transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Dec 2010]

Known Variants16 total

rsidPosition (GRCh37)AllelesClassClinVar
rs1449091711:161,141,626C/Auncertain significance
rs7641835201:161,141,671G/Auncertain significance
rs3749829351:161,141,697G/Auncertain significance
rs1464781511:161,141,712G/Cuncertain significance
rs9502196741:161,141,769G/Auncertain significance
rs7744030751:161,142,084T/Cuncertain significance
rs1493498921:161,143,440T/Cuncertain significance
rs25254521761:161,143,471C/Tuncertain significance
rs1995394041:161,143,685C/Tuncertain significance
rs7767133631:161,143,695G/Auncertain significance
rs7753779551:161,144,856C/Tuncertain significance
rs7538143521:161,144,872G/Auncertain significance
rs25255168261:161,145,649G/Auncertain significance
rs7708218831:161,145,732C/Tuncertain significance
rs2011400141:161,145,834A/Guncertain significance
rs5655132871:161,149,386G/A

Gene information from NCBI Gene. Variant classifications from ClinVar.