Required for cytoplasm to vacuole transport (Cvt) vesicles formation and mitophagy. Involved in binding of phosphatidylethanolamine to ATG8 and in recruitment of ATG8 and ATG5 to the pre-autophagosomal structure. Protects ATG8 from ARG4-mediated cleavage. Essential for maturation of proaminopeptidase I. And perivacuolar punctate structures. Contains a beta-propeller domain involved in specific binding to phosphatidylinositol 3,5-bisphosphate (PIP2). The L/FRRG motif is essential for the cytoplasm to vacuole transport (Cvt) pathway and for the recruitment of ATG8 and ATG16 to the PAS in nutrient-rich medium and in both its recruitment to and dissociation from the PAS under starvation conditions. Present with 6020 molecules/cell in log phase SD medium. Belongs to the WD repeat PROPPIN family.