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Related Experiment Videos

Lipid rafts and pseudotyping.

W F Pickl1, F X Pimentel-Muiños, B Seed

  • 1Department of Molecular Biology, Massachusetts General Hospital, Boston, Massachusetts 02114, USA.

Journal of Virology
|July 4, 2001
PubMed
Summary
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Lipid rafts in cell membranes act as meeting points for viral components during mixed infections. This allows viruses to acquire envelopes from other viruses, influencing viral particle formation and production.

Area of Science:

  • Virology
  • Cell Biology
  • Biochemistry

Background:

  • Enveloped virus assembly relies on interactions between viral envelope and core proteins.
  • Pseudotyping, where viral cores associate with foreign envelopes, occurs during mixed infections.
  • The mechanism behind pseudotyping and altered viral particle composition remains unclear.

Purpose of the Study:

  • To investigate the role of lipid rafts in the membrane assembly of enveloped viruses.
  • To understand how pseudotyping occurs at the molecular level during mixed viral infections.
  • To identify host cell components involved in viral particle formation.

Main Methods:

  • Analysis of viral protein and lipid raft interactions within the plasma membrane.
  • Studying a phylogenetically diverse range of enveloped viruses.

Related Experiment Videos

  • Utilizing pharmacological agents to disrupt lipid rafts and observe effects on virus production.

    • Main Results:

    • Detergent-insoluble lipid rafts serve as a convergence point for viral envelope and core proteins.
    • Viral particles incorporate host cell lipid raft components, including gangliosides and GPI-anchored proteins.
    • Disruption of lipid rafts significantly impairs the production of infectious viral particles.

    Conclusions:

    • Lipid rafts are crucial platforms for enveloped virus assembly and facilitate pseudotyping.
    • Viral particles acquire host cell lipid raft constituents, potentially altering their properties.
    • Targeting lipid rafts offers a potential strategy for controlling viral propagation.