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Related Experiment Videos

Organization and function of TRPC channelosomes.

Indu S Ambudkar1, Hwei Ling Ong

  • 1Secretory Physiology Section, Gene Therapy and Therapeutics Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892, USA. indu.ambudkar@nih.gov

Pflugers Archiv : European Journal of Physiology
|May 9, 2007
PubMed
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Transient Receptor Potential Canonical (TRPC) proteins form calcium channels regulated by PIP2 hydrolysis. Their assembly with accessory proteins into

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • Transient Receptor Potential Canonical (TRPC) proteins are calcium-permeable cation channels.
  • TRPC channels are activated by agonist-stimulated phosphoinositide-2 (PIP2) hydrolysis.
  • TRPC proteins are implicated in store-operated calcium entry (SOC) and other calcium signaling pathways.

Purpose of the Study:

  • To review the accessory proteins of TRPC channels.
  • To discuss the functional implications of TRPC channelosomes.
  • To explore the assembly of TRPC channels in cellular microdomains.

Main Methods:

  • Literature review of studies on TRPC channel accessory proteins.
  • Analysis of existing data on TRPC channel regulation, localization, and function.

Related Experiment Videos

  • Discussion of TRPC channelosome formation and its role in cellular signaling.

    • Main Results:

    • TRPC monomers form distinct channels through homomeric or heteromeric interactions.
    • Accessory proteins, including those involved in Ca2+ signaling and trafficking, modulate TRPC channel regulation, localization, and function.
    • TRPC proteins assemble into specific signaling complexes (channelosomes) that control Ca2+ signals and downstream cellular functions.

    Conclusions:

    • TRPC channel assembly with accessory proteins dictates their functional properties.
    • TRPC channelosomes act as platforms for coordinated cellular responses to extracellular stimuli.
    • Understanding TRPC channel organization is crucial for deciphering complex Ca2+ signaling events.