Calcium/calmodulin-regulated and magnesium-dependent enzyme that catalyzes the hydrolysis of ATP coupled with the transport of calcium out of the cell . By regulating sperm cell calcium homeostasis, may play a role in sperm motility (By similarity).
Subcellular locations: Cell membrane, Cell projection, Cilium, Flagellum membrane
Isoform XB is the most abundant isoform and is expressed ubiquitously. Isoforms containing segment Z have only been detected in heart, while isoforms containing segment a have been found in heart, stomach and brain cortex.