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Structural and dynamic mechanisms for the function and inhibition of the M2 proton channel from influenza A virus

Jun Wang1, Jade Xiaoyan Qiu, Cinque Soto

  • 1Department of chemistry, University of Pennsylvania, 231 south, 34th st, Philadelphia, PA 19104, USA.

Current Opinion in Structural Biology
|January 21, 2011
PubMed

Insights

Influenza M2 proton channel drugs block proton flow by binding near the filter. This binding alters the channel

Area of Science:

  • Virology
  • Biophysics
  • Structural Biology

Background:

  • Influenza A virus M2 protein forms proton-selective channels (viroporins).
  • Proton conduction involves water molecules and ionizable residues like His37.
  • Protein folding, proton binding, and conduction are intricately linked.

Purpose of the Study:

  • To investigate the mechanism of M2 channel inhibition by drugs.
  • To understand how drug binding affects proton conduction and His37 energetics.

Main Methods:

  • Utilized biophysical techniques to study M2 channel function.
  • Analyzed drug binding sites and their impact on proton pathways.

Main Results:

  • Drugs bind to an aqueous cavity near the M2 proton filter.
  • This binding obstructs proton access to the filter.
  • Drug binding modifies the channel's energy landscape and His37 protonation energetics.

Conclusions:

  • Drug binding at the M2 channel cavity is a viable inhibition strategy.
  • Understanding these interactions aids in developing antiviral therapies.
  • The study elucidates the complex interplay of M2 channel dynamics.

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