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Related Experiment Videos

Structure and function of voltage-gated sodium channels

E Marban1, T Yamagishi, G F Tomaselli

  • 1Section of Molecular and Cellular Cardiology, The Johns Hopkins University, Baltimore, MD 21205, USA. marban@welchlink.welch.jhu.edu

The Journal of Physiology
|June 20, 1998
PubMed
Summary

This review explores sodium channel structure and function, detailing their modular architecture, dynamic molecular movements, and interactions with local anesthetics and toxins. It also covers regulatory mechanisms influencing sodium channel activity.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Biophysics

Background:

  • Sodium channels are crucial for electrical impulse conduction in nerve, muscle, and heart.
  • Understanding their structure-function relationship is key to various physiological processes.

Purpose of the Study:

  • To review the intricate links between sodium channel structure and function.
  • To elucidate the molecular basis of sodium channel activity and regulation.

Main Methods:

  • Review of existing literature on sodium channel biophysics and molecular biology.
  • Analysis of structural data and functional studies.

Main Results:

  • Sodium channels exhibit a modular architecture with interacting pore and gating regions.

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  • Channels are dynamic molecular entities, undergoing significant movement during gating and ion transport.
  • Specific binding sites for local anesthetics and toxins have been identified.
  • Regulation occurs at transcriptional, subunit interaction, and post-translational levels (glycosylation, phosphorylation).

    • Conclusions:

    • Sodium channel function is intrinsically linked to their complex, dynamic structure.
    • Multiple regulatory pathways modulate sodium channel activity, impacting cellular excitability.
    • Further research into these interactions can inform therapeutic strategies.