May be involved in both secretory and endocytic intracellular trafficking in the endosomal/prevacuolar compartments. Interacts with PRA1F2 and PRA1F3. Interacts with the cauliflower mosaic virus (CaMV) movement protein (via N-terminus). Expressed in hypocotyls, roots, lateral roots, lateral root caps, columella cells, leaves, shoot apex, stems and flowers. Belongs to the PRA1 family.