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Canonical transient receptor potential 5.

D J Beech1

  • 1Institute of Membrane and Systems Biology, University of Leeds, Leeds LS2 9JT, UK. d.j.beech@leeds.ac.uk

Handbook of Experimental Pharmacology
|January 16, 2007
PubMed
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Canonical transient receptor potential 5 (TRPC5) is a calcium-permeable channel with diverse activators and complex regulation. Its emerging roles in smooth muscle and neuronal growth inhibition are significant.

Area of Science:

  • Molecular Biology
  • Cell Physiology
  • Ion Channel Function

Background:

  • Canonical transient receptor potential 5 (TRPC5) is a mammalian TRPC protein forming mixed cationic plasma membrane channels.
  • TRPC5 exhibits calcium permeability and can assemble with other TRPC proteins like TRPC1, TRPC4, and TRPC3.

Purpose of the Study:

  • To summarize the known functional properties, activators, regulators, and emerging biological roles of the TRPC5 channel.
  • To highlight TRPC5's potential involvement in smooth muscle excitation and neuronal growth inhibition.

Main Methods:

  • Review of existing literature on TRPC5 channel function and regulation.
  • Analysis of TRPC5's interactions with activators, inhibitors, and protein partners.
  • Examination of TRPC5's proposed roles in different cellular contexts.

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Main Results:

  • TRPC5 is activated by G protein-coupled receptor agonists, lysophospholipids, lanthanide ions, and calcium store depletion.
  • Intracellular calcium and protein kinase C have complex modulatory effects on TRPC5 activity.
  • TRPC5 interacts with various proteins including calmodulin and NHERF, and is involved in vesicular trafficking.

Conclusions:

  • TRPC5 is a broadly expressed calcium channel integrating extracellular and intracellular signals.
  • Emerging roles in smooth muscle and neuronal development suggest significant biological importance.
  • Further research is needed to fully elucidate the diverse functions of TRPC5.