Plasma membrane calcium ATPase is concentrated in the head of sea urchin spermatozoa.

@article{Gunaratne2006PlasmaMC,
  title={Plasma membrane calcium ATPase is concentrated in the head of sea urchin spermatozoa.},
  author={Herath Jayantha Gunaratne and Anna T Neill and Victor D. Vacquier},
  journal={Journal of cellular physiology},
  year={2006},
  volume={207 2},
  pages={413-9}
}
Plasma membrane Ca2+ATPases (PMCAs) export Ca2+ from cells in a highly regulated manner, providing fine-tuning to the maintenance of intracellular Ca2+ concentrations. There are few studies of PMCAs in spermatozoa, which is surprising considering the importance of this enzyme in all cell types. Here we describe the primary structure and localization of the PMCA of sea urchin spermatozoa (suPMCA). The suPMCA is 1,154 amino acids and has 56% identity and 76% similarity to all 4 human PMCA… CONTINUE READING
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