Sorting receptor that directs prohormones to the regulated secretory pathway. Acts also as a prohormone processing enzyme in neuro/endocrine cells, removing dibasic residues from the C-terminal end of peptide hormone precursors after initial endoprotease cleavage.
Subcellular locations: Cytoplasmic vesicle, Secretory vesicle, Cytoplasmic vesicle, Secretory vesicle membrane, Secreted
Associated with the secretory granule membrane through direct binding to lipid rafts in intragranular conditions.