galactosylxylosylprotein 3-beta-galactosyltransferase activity
Catalysis of the reaction: 4-beta-D-galactosyl-O-beta-D-xylosylprotein + UDP-galactose = 3-beta-D-galactosyl-4-beta-D-galactosyl-O-beta-D-xylosylprotein + UDP.
GO:0035250
UDP-galactosyltransferase activity
is_a
GO:0140103
catalytic activity, acting on a glycoprotein
is_a
UDP-galactose:4-beta-D-galactosyl-O-beta-D-xylosylprotein 3-beta-D-galactosyltransferase activity
related
UDPgalactose:4-beta-D-galactosyl-O-beta-D-xylosylprotein 3-beta-D-galactosyltransferase activity
related
galactosyltransferase II activity
related
uridine diphosphogalactose-galactosylxylose galactosyltransferase activity
related
SPBC1921.06c