Cation channel sperm-associated protein subunit zeta (CATSPERZ)

Auxiliary component of the CatSper complex, a complex involved in sperm cell hyperactivation. Sperm cell hyperactivation is necessary for sperm motility that's essential late in the preparation of sperm for fertilization.

Required for a distribution of the CatSper complex in linear quadrilateral nanodomains along the flagellum, maximizing fertilization within the mammalian female reproductive tract. .