Glycosyltransferase with a proposed role in glycosphingolipid biosynthesis. Involved in susceptibility to pore-forming crystal toxins in conjunction with bre-1, bre-2 and bre-4. Involved in resistance to the nematotoxic C.cinerea galectin Cgl2. Has a role in determining brood size (By similarity). Protein modification; protein glycosylation. In punctate structures throughout the cell. Belongs to the glycosyltransferase 2 family.