Galactosyltransferase (GalT)

Galactosyltransferases are a diverse family of enzymes responsible for the transfer of galactose from uridine diphosphate (UDP)-galactose to various acceptor molecules, including proteins, lipids, and other carbohydrates. These enzymes are primarily localized in the Golgi apparatus and are essential for the biosynthesis of complex glycoconjugates that mediate critical biological processes such as cell-cell recognition, adhesion, and signal transduction. In many pathological states, particularly cancer, the expression and activity of galactosyltransferases are significantly altered, leading to the production of aberrant glycan structures that promote tumor invasion, metastasis, and immune evasion. Consequently, these enzymes have emerged as potential therapeutic targets for the development of inhibitors aimed at normalizing glycosylation patterns in malignant and inflammatory conditions. However, because glycosylation is a fundamental post-translational modification required for the function of many proteins, achieving high selectivity for disease-specific isoforms remains a significant challenge in drug development.

Other names

UDP-galactose:glycoprotein galactosyltransferaseGalactosyl transferaseBeta-1,4-galactosyltransferaseAlpha-1,3-galactosyltransferaseGlycosyltransferase family 7

Inhibition of the transfer of galactose from UDP-galactose to acceptor substrates, thereby modulating the glycan structures on the cell surface and secreted proteins.