Plays a role in the process of sperm capacitation and acrosome reactions. Probable receptor for the putative fertilization-promoting peptide (FPP) at the sperm membrane that may modulate the activity of the adenylyl cyclase cAMP pathway.
Membrane ; Single-pass membrane protein . Cell projection, cilium, flagellum . Cytoplasmic vesicle, secretory vesicle, acrosome . Localizes on the acrosomal cap region of acrosome-intact, but not acrosome-reacted sperm. Colocalizes with MROH2B and PRKACA on the acrosome and tail regions in round spermatids and spermatozoa regardless of the capacitation status of the sperm. .
Isoform 2 and isoform 3 are expressed in sperm. Isoform 1 is not detected in sperm (at protein level) (PubMed:21597245). Testis-specific (PubMed:11756566). Isoform 1, isoform 2 and isoform 3 are expressed in sperm (PubMed:21597245).
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