Plasma membrane Ca2+ ATPases as dynamic regulators of cellular calcium handling

Emanuel E. Strehler, Ariel J. Caride, Adelaida G. Filoteo, Yuning Xiong, John T. Penniston, Agnes Enyedi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

91 Scopus citations

Abstract

Plasma membrane Ca2+ ATPases (PMCAs) are essential components of the cellular toolkit to regulate and fine-tune cytosolic Ca2+ concentrations. Historically, the PMCAs have been assigned a housekeeping role in the maintenance of intracellular Ca2+ homeostasis. More recent work has revealed a perplexing multitude of PMCA isoforms and alternative splice variants, raising questions about their specific role in Ca2+ handling under conditions of varying Ca2+ loads. Studies on the kinetics of individual isoforms, combined with expression and localization studies suggest that PMCAs are optimized to function in Ca2+ regulation according to tissue- and cell-specific demands. Different PMCA isoforms help control slow, tonic Ca2+ signals in some cells and rapid, efficient Ca2+ extrusion in others. Localized Ca2+ handling requires targeting of the pumps to specialized cellular locales, such as the apical membrane of cochlear hair cells or the basolateral membrane of kidney epithelial cells. Recent studies suggest that alternatively spliced regions in the PMCAs are responsible for their unique targeting, membrane localization, and signaling cross-talk. The regulated deployment and retrieval of PMCAs from specific membranes provide a dynamic system for a cell to respond to changing needs of Ca2+ regulation.

Original languageEnglish (US)
Title of host publicationSodium-Calcium Exchange and the Plasma Membrane Ca2+ATPase in Ce;; Funcyion
Subtitle of host publicationFifth International Conference
PublisherBlackwell Publishing Inc.
Pages226-236
Number of pages11
ISBN (Print)1573316490, 9781573316491
DOIs
StatePublished - Mar 2007

Publication series

NameAnnals of the New York Academy of Sciences
Volume1099
ISSN (Print)0077-8923
ISSN (Electronic)1749-6632

    Fingerprint

Keywords

  • Calcium homeostasis
  • Calcium pump
  • Calcium signaling
  • PMCA
  • Splice variant

ASJC Scopus subject areas

  • Neuroscience(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • History and Philosophy of Science

Cite this

Strehler, E. E., Caride, A. J., Filoteo, A. G., Xiong, Y., Penniston, J. T., & Enyedi, A. (2007). Plasma membrane Ca2+ ATPases as dynamic regulators of cellular calcium handling. In Sodium-Calcium Exchange and the Plasma Membrane Ca2+ATPase in Ce;; Funcyion: Fifth International Conference (pp. 226-236). (Annals of the New York Academy of Sciences; Vol. 1099). Blackwell Publishing Inc.. https://doi.org/10.1196/annals.1387.023