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Single-Cell Calcium Imaging for Studying the Activation of Calcium Ion Channels
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Single-Cell Calcium Imaging for Studying the Activation of Calcium Ion Channels

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ORAI Calcium Channels

Mohamed Trebak1, James W Putney2

  • 1The Department of Cellular and Molecular Physiology, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania; and mtrebak@psu.edu.

Physiology (Bethesda, Md.)
|June 16, 2017
PubMed

Insights

This review explores ORAI proteins, their gene variants, and their role in forming calcium channels. It details how these channels are regulated and impact cellular signaling for physiological functions.

Area of Science:

  • Molecular biology
  • Cell physiology
  • Biochemistry

Background:

  • ORAI proteins are critical pore-forming subunits of calcium release-activated calcium (CRAC) channels.
  • Dysregulation of calcium signaling is implicated in numerous diseases.
  • Understanding ORAI protein diversity is key to deciphering calcium channel function.

Purpose of the Study:

  • To review the diverse gene products and translational variants of ORAI proteins.
  • To elucidate the composition and activation mechanisms of native calcium channels formed by ORAI proteins.
  • To summarize the regulatory mechanisms governing these channels and their downstream signaling effects.

Main Methods:

  • Literature review of ORAI protein research.
  • Analysis of ORAI gene and protein variants.
  • Synthesis of data on calcium channel assembly and regulation.

Main Results:

  • ORAI proteins exhibit significant genetic and translational diversity, leading to distinct channel compositions.
  • Native calcium channels display varied structures and activation properties based on ORAI variants.
  • Multiple regulatory pathways modulate ORAI-mediated calcium influx, influencing cellular responses.

Conclusions:

  • ORAI protein diversity underlies the functional heterogeneity of native calcium channels.
  • Precise regulation of ORAI-dependent calcium signaling is essential for maintaining physiological homeostasis.
  • Further research into ORAI variants may reveal novel therapeutic targets for calcium channelopathies.

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