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Recapitulation of an Ion Channel IV Curve Using Frequency Components
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Ion-channel modulators: more diversity than previously thought.

Sébastien Dilly1, Cédric Lamy, Neil V Marrion

  • 1Laboratory of Medicinal Chemistry and CIRM, University of Liège, 1 Avenue de l'Hôpital, 4000 Liège, Belgium. sdilly@ulg.ac.be

Chembiochem : a European Journal of Chemical Biology
|July 5, 2011
PubMed
Summary

Allosteric modulation, a key mechanism, influences ion channel function. Binding sites near the outer pore offer therapeutic potential for various ion channels.

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Area of Science:

  • Pharmacology
  • Molecular Biology
  • Biophysics

Background:

  • Ion channel function is modulated through pore block and changes in voltage dependence.
  • Allosteric modulation is increasingly recognized as a significant mechanism affecting ion channel activity.

Purpose of the Study:

  • To highlight allosteric modulation as a critical mechanism for ion channel function.
  • To emphasize the therapeutic potential of binding sites located at the outer pore mouth of ion channels.

Main Methods:

  • Review of recent experimental findings on various ion channels.
  • Analysis of allosteric modulation mechanisms, including pore block and toxin interactions.

Main Results:

  • Apamin binding to K(Ca)2 channels and DkTx interaction with TRPV1 channels exemplify allosteric modulation.
  • Residues away from the selectivity filter are involved in allosteric regulation.
  • The outer pore region of several ion channels is identified as a site rich in drug-binding targets.

Conclusions:

  • Allosteric modulation is a vital mechanism for regulating ion channel function.
  • The outer pore mouth represents a promising area for therapeutic exploitation in ion channel modulation.
  • Pharmacological terminology may need refinement to encompass these diverse allosteric actions.