Enables N-acylsphingosine galactosyltransferase and UDP-galactose:glucosylceramide
beta-1,4-galactosyltransferase activity. Involved in galactosylceramide biosynthetic process and response to immobilization stress. Located in endoplasmic reticulum. Orthologous to human UGT8 (UDP glycosyltransferase 8); PARTICIPATES IN Fabry disease pathway; Gaucher's disease pathway; Krabbe disease pathway; INTERACTS WITH 2,3,7,8-tetrachlorodibenzodioxine; 2,3,7,8-Tetrachlorodibenzofuran; 6-propyl-2-thiouracil.