Cited by 2,089Ion Channels and ReceptorsCalcium signaling and nucleotide metabolismIon channel regulation and function

Store-Operated Calcium Channels

Parekh, Anant B., Putney, James W.·2005·Physiological Reviews

Abstract

In electrically nonexcitable cells, Ca 2+influx is essential for regulating a host of kinetically distinct processes involving exocytosis, enzyme control, gene regulation, cell growth and proliferation, and apoptosis. The major Ca 2+entry pathway in these cells is the store-operated one, in which the emptying of intracellular Ca 2+stores activates Ca 2+influx (store-operated Ca 2+entry, or capacitative Ca 2+entry). Several biophysically distinct store-operated currents have been reported, but the best characterized is the Ca 2+release-activated Ca 2+current, I CRAC. Although it was initially considered to function only in nonexcitable cells, growing evidence now points towards a central role for I CRAC-like currents in excitable cells too. In spite of intense research, the signal that relays the store Ca 2+content to CRAC channels in the plasma membrane, as well as the molecular identity of the Ca 2+sensor within the stores, remains elusive. Resolution of these issues would be greatly helped by the identification of the CRAC channel gene. In some systems, evidence suggests that store-operated channels might be related to TRP homologs, although no consensus has yet been reached. Better understood are mechanisms that inactivate store-operated entry and hence control the overall duration of Ca 2+entry. Recent work has revealed a central role for mitochondria in the regulation of I CRAC, and this is particularly prominent under physiological conditions. I CRAC therefore represents a dynamic interplay between endoplasmic reticulum, mitochondria, and plasma membrane. In this review, we describe the key electrophysiological features of I CRAC and other store-operated Ca 2+currents and how they are regulated, and we consider recent advances that have shed insight into the molecular mechanisms involved in this ubiquitous and vital Ca 2+entry pathway.

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Crossref · 10.1152/physrev.00057.2003

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  • The La3+-induced block of Ca2+ currents is a pharmacological hallmark of SOC channels.

    “The La 3ϩ -induced block of Ca 2ϩ currents is a pharmacological hallmark of SOC channels (3, 4), further strengthening the functional similarity between CMC and SOC channels in mammalian cells.”
  • Unlike some SOC channels in higher eukaryotes that are highly permeable to Na+ in the absence of divalent cations, Cch1 is weakly permeable to Na+ and maintains strong Ca2+ selectivity even in high [Na+].

    “These results indicated that unlike some SOC channels in higher eukaryotes that are highly permeable to Na ϩ in the absence of divalent cations, Cch1 is weakly permeable to Na ϩ and maintains a strong Ca 2ϩ selectivity even in the presence of high [Na ϩ ] (4, 27).”

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Authors
Parekh, A. B., & Putney, J. W.
Affiliations
  • University of Oxford (GB)
  • National Institutes of Health (US)
Venue
Physiological Reviews
Published
2005-04
Volume
85
Issue
2
Pages
757-810
ISSN
  • 0031-9333 (ISSN-L)
  • 1522-1210
OpenAlex
W2137258759
Cited by
2,089
References
454
Citations by year
2026: 18 · 2025: 30 · 2024: 25 · 2023: 38 · 2022: 55 · 2021: 67 · 2020: 67 · 2019: 69 · 2018: 80 · 2017: 90 · 2016: 96 · 2015: 108 · 2014: 120 · 2013: 111 · 2012: 137
FWCI
13.85
Type
journal article
Language
en
Open access
closed
Locations
  • Physiological Reviews (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Sensory Systems › Ion Channels and Receptors
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Calcium signaling and nucleotide metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion channel regulation and function
Keywords
store-operated calcium entry, calcium release-activated calcium current, CRAC channels, intracellular calcium stores, endoplasmic reticulum, mitochondria, TRP channels, calcium signaling, non-excitable cells, excitable cells, calcium sensor, channel regulation
MeSH terms
Animals, Calcium, Disease, Electric Conductivity, Electrophysiology, Humans, Calcium Channels, Receptors, Calcium-Sensing

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