Predicted to enable glycoprotein-N-acetylgalactosamine 3-beta-galactosyltransferase activity. Acts upstream of or within angiogenesis; intestinal epithelial cell development; and protein O-linked glycosylation. Predicted to be integral component of membrane. Is expressed in several structures, including alimentary system; central nervous system; genitourinary system; respiratory system; and sensory organ. Orthologous to human C1GALT1 (core 1 synthase, glycoprotein-N-acetylgalactosamine 3-beta-galactosyltransferase 1). [provided by Alliance of Genome Resources, Apr 2022]