The product of this gene is a transmembrane protein belonging to the glucuronyltransferase family, and catalyzes the transfer of a beta-1,3 linked glucuronic acid to a terminal galactose in different glycoproteins or glycolipids containing a Gal-beta-1-4GlcNAc or Gal-beta-1-3GlcNAc residue. The encoded protein is involved in the synthesis of the human natural killer-1 (HNK-1) carbohydrate epitope, a sulfated trisaccharide implicated in cellular migration and adhesion in the nervous system. [provided by RefSeq].Synonyms: 3-glucuronyltransferase 2, Beta-1, GLCATS, Galactosylgalactosylxylosylprotein 3-beta-glucuronosyltransferase 2, GlcAT-D, GlcAT-S, Glucuronosyltransferase S, KIAA1963, UDP-glucuronosyltransferase S