Predicted to enable glycoprotein-N-acetylgalactosamine 3-beta-galactosyltransferase activity. Predicted to be involved in O-glycan processing, core 1. Predicted to act upstream of or within platelet activation; platelet morphogenesis; and protein O-linked glycosylation. Predicted to be integral component of membrane. Human ortholog(s) of this gene implicated in Tn polyagglutination syndrome. Orthologous to human C1GALT1C1 (C1GALT1 specific chaperone 1). [provided by Alliance of Genome Resources, Apr 2022]