Enables galactosylgalactosylxylosylprotein 3-beta-glucuronosyltransferase activity. Involved in carbohydrate biosynthetic process. Predicted to be integral component of membrane. Predicted to be active in Golgi membrane. Human ortholog(s) of this gene implicated in Barrett's esophagus and schizophrenia. Orthologous to human B3GAT2 (beta-1,3-glucuronyltransferase 2). [provided by Alliance of Genome Resources, Apr 2022]