Antiporter that mediates the exchange of sulfate and oxalate against chloride ions across a membrane. Stimulates anion transport activity of CFTR (By similarity). May cooperate with CFTR in the regulation of chloride and bicarbonate ions fluxes required for activation of the ADCY10/PKA pathway during sperm motility and sperm capacitation. May play a role in sperm tail differentiation and motility and hence male fertility (By similarity).
Subcellular locations: Membrane
Located at both the annulus and the equatorial segment of the human sperm head.