A sperm-specific voltage-gated calcium channel that controls the intracellular calcium ion concentration and, thereby, the swimming behavior of sperm. Consists of a heteromeric tetramer surrounding a calcium ion- selective pore. May also contain additional auxiliary subunits. (Gene Ontology, GO_0036128)
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9 proteins localized to the catsper complex cellular component from the COMPARTMENTS Curated Protein Localization Evidence Scores dataset.