Predicted to enable galactose 3-O-sulfotransferase activity. Predicted to be involved in glycolipid biosynthetic process. Predicted to act upstream of or within glycoprotein biosynthetic process. Predicted to be located in membrane. Orthologous to human GAL3ST4 (galactose-3-O-sulfotransferase 4). [provided by Alliance of Genome Resources, Apr 2022]