Functions as a sorting receptor in the Golgi compartment required for the intracellular sorting and delivery of soluble vacuolar proteins, like carboxypeptidase Y (CPY) and proteinase A. Executes multiple rounds of sorting by cycling between the late Golgi and a prevacuolar endosome-like compartment (By similarity). Cycles between the Golgi apparatus and the prevacuolar compartment. Belongs to the VPS10-related sortilin family.