EC number 2.4.1.134 IntEnz IntEnz view ExPASy NiceZyme view | CAS number 56626-21-2 BRENDA BRENDA entry KEGG KEGG entry | |
In enzymology, a galactosylxylosylprotein 3-beta-galactosyltransferase (EC 2.4.1.134) is an enzyme that catalyzes the chemical reaction
UDP-galactose + 4-beta-D-galactosyl-O-beta-D-xylosylproteinThus, the two substrates of this enzyme are UDP-galactose and 4-beta-D-galactosyl-O-beta-D-xylosylprotein, whereas its two products are UDP and 3-beta-D-galactosyl-4-beta-D-galactosyl-O-beta-D-xylosylprotein.
This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is UDP-galactose:4-beta-D-galactosyl-O-beta-D-xylosylprotein 3-beta-D-galactosyltransferase. Other names in common use include galactosyltransferase II, and uridine diphosphogalactose-galactosylxylose galactosyltransferase. This enzyme participates in chondroitin sulfate biosynthesis and glycan structures - biosynthesis 1. It employs one cofactor, manganese.