Required for the autophagic degradation of peroxisomes called pexophagy, but not essential for general autophagy (By similarity). Involved in resistance to elevated pH (By similarity). Concentration increases at the vacuolar and cytoplasmic vesicular membranes during the course of pexophagy (By similarity). Does not significantly decrease the growth rate under nutrient-rich conditions (PubMed:28894236). Belongs to the ATG28 family.