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Molecular mechanism of paramyxovirus budding

Toru Takimoto1, Allen Portner

  • 1Department of Microbiology and Immunology, University of Rochester Medical Center, 601 Elmwood Avenue, Box 672, Rochester, NY 14642, USA. toru_takimoto@urmc.rochester.edu

Virus Research
|November 30, 2004
PubMed

Insights

The paramyxovirus matrix (M) protein orchestrates virus budding by organizing viral components at the plasma membrane. This essential viral protein alone can drive the formation and release of virus-like particles.

Area of Science:

  • Virology
  • Cell Biology
  • Structural Biology

Background:

  • Paramyxoviruses assemble at the plasma membrane, with progeny viruses forming via budding.
  • The molecular mechanisms of viral budding, including membrane dynamics, are not fully understood.
  • The viral matrix (M) protein is a key component implicated in paramyxovirus budding.

Purpose of the Study:

  • To elucidate the role of the paramyxovirus matrix (M) protein in viral assembly and budding.
  • To investigate the M protein's interactions with viral components and the host cell membrane.
  • To understand how M protein drives the formation and release of virus-like particles.

Main Methods:

  • Analysis of M protein expression and its association with the plasma membrane.
  • Investigating M protein interactions with viral glycoproteins and nucleocapsids.
  • Studying the formation of virus-like particles upon M protein expression.

Main Results:

  • The M protein forms a dense layer on the inner leaflet of the plasma membrane.
  • M protein expression alone can induce the formation and release of virus-like particles.
  • M protein mediates interactions with glycoproteins and nucleocapsids, directing them to the budding site.

Conclusions:

  • The paramyxovirus M protein plays a central, orchestrating role in the viral budding process.
  • M protein's ability to induce virus-like particle formation highlights its critical function in assembly and release.
  • Understanding M protein function is crucial for developing antiviral strategies against paramyxoviruses.

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