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Protein partners of the calcium channel β subunit highlight new cellular functions

Mohamad Rima1, Marwa Daghsni2, Ziad Fajloun3

  • 1LabEx Ion Channels, Science and Therapeutics, INSERM UMR1087/CNRS UMR6291, l'institut du Thorax, Nantes F-44000, France Azm Center for Research in Biotechnology and its Application, Lebanese University, 1300 Tripoli, Lebanon.

The Biochemical Journal
|June 30, 2016
PubMed

Insights

The Cavβ subunit is crucial for voltage-gated calcium channels (VGCC) and also performs diverse, independent cellular functions. This review highlights Cavβ

Area of Science:

  • Cell Biology
  • Neuroscience
  • Biochemistry

Background:

  • Calcium ions (Ca2+) are vital for cellular signaling across numerous physiological processes.
  • Voltage-gated calcium channels (VGCC) mediate Ca2+ entry into cells, present in both excitable and non-excitable cell types.
  • VGCC comprise subunits, with the cytosolic Cavβ subunit regulating channel trafficking, gating, and membrane localization.

Purpose of the Study:

  • To review the diverse cellular functions of the Cavβ subunit.
  • To emphasize the emerging roles of Cavβ beyond its established function in VGCC regulation.
  • To summarize current understanding and recent advancements regarding Cavβ and VGCC.

Main Methods:

  • Literature review of studies investigating Cavβ protein interactions.
  • Analysis of identified Cavβ protein partners to infer cellular functions.
  • Synthesis of existing research on VGCC structure, function, and regulation by Cavβ.

Main Results:

  • Cavβ subunit is essential for VGCC trafficking, regulation, and gating properties.
  • A growing number of proteins interact with Cavβ, revealing multifunctional roles.
  • Some identified Cavβ functions are independent of its role in VGCC regulation.

Conclusions:

  • The Cavβ subunit possesses multifaceted cellular roles extending beyond VGCC modulation.
  • Understanding Cavβ-interacting proteins is key to elucidating its diverse functions.
  • Further research into Cavβ's non-VGCC roles will expand knowledge of cellular signaling and physiology.
Keywords:
calcium channelsgene expression and regulationvoltage-gated channels

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