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Related Experiment Videos

Virus membrane fusion.

Winfried Weissenhorn1, Andreas Hinz, Yves Gaudin

  • 1European Molecular Biology Laboratory, 6 Rue Jules Horowitz, 38042 Grenoble, France. weissenhorn@embl.fr

FEBS Letters
|February 27, 2007
PubMed
Summary
This summary is machine-generated.

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Viral glycoproteins mediate enveloped virus fusion with cell membranes through conformational changes. Further research is needed on fusion protein intermediates, membrane anchors, and the number of proteins required for fusion.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Virology

Background:

  • Enveloped viruses utilize viral glycoproteins (GP) to mediate fusion with host cellular membranes.
  • GP undergo conformational changes upon receptor binding or endosomal acidification, driving membrane fusion.
  • Current understanding reveals refolding repositions membrane anchors, forming hairpin structures and enabling fusion.

Purpose of the Study:

  • To elucidate the structural intermediates of viral fusion proteins during membrane fusion.
  • To investigate the precise interactions between fusion proteins and lipid bilayers.
  • To determine the stoichiometry of viral fusion proteins required for effective membrane fusion.

Main Methods:

  • Structural biology techniques (e.g., cryo-EM, X-ray crystallography) to visualize fusion protein intermediates.

Related Experiment Videos

  • Lipid-protein interaction assays to study membrane anchor behavior.
  • Biophysical methods to assess the functional role of fusion protein oligomers.

    • Main Results:

    • Viral fusion proteins adopt elongated hairpin structures post-refolding, bringing membranes together.
    • Fusion proceeds through transient lipidic intermediate states.
    • The refolding process supplies the energy necessary for bilayer fusion.

    Conclusions:

    • While core principles of viral membrane fusion are known, detailed structures of intermediates remain elusive.
    • The exact roles of membrane anchors and the number of fusion proteins involved require further investigation.
    • Understanding these aspects is crucial for developing antiviral strategies targeting viral entry.