Involved in fertilization. Seems not to play a direct role in sperm-egg binding or gamete fusion.
Subcellular locations: Secreted, Cytoplasmic vesicle, Secretory vesicle, Acrosome, Cytoplasmic vesicle, Secretory vesicle, Acrosome lumen
Localized in perinuclear pro-acrosomal granules in round spermatides. Localized between the inner and outer acrosomal membranes (matrix or lumen) in spermatozoa. Secreted during acrosome exocytosis.
Expressed in spermatozoa (at protein level) .