Probable sterol 3-beta-glucosyltransferase that mediates autophagic degradation of peroxisomes (pexophagy) (By similarity). Also required for cytoplasm to vacuole transport (Cvt) and autophagic degradation of mitochondria (mitophagy) and nuclei (nucleophagy) (By similarity). a sterol + UDP-alpha-D-glucose = a sterol 3-beta-D-glucoside + H(+) + UDP The GRAM and PH domains are required for the localization of ATG26 to the preautophagosomal structure (PAS) and are involved in autophagy (By similarity). Belongs to the glycosyltransferase 28 family.