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Measles and Nipah virus assembly: Specific lipid binding drives matrix polymerization

Michael J Norris1, Monica L Husby2, William B Kiosses1

  • 1Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA 92037, USA.

Science Advances
|July 20, 2022
PubMed

Insights

Paramyxovirus matrix (M) proteins bind specific lipids like PI(4,5)P2 at cell membranes. This interaction drives viral assembly and budding, offering new targets for antiviral drug design.

Area of Science:

  • Virology
  • Structural Biology
  • Molecular Biology

Background:

  • Paramyxoviruses cause significant global disease outbreaks in humans and animals.
  • The viral matrix (M) protein is essential for virion assembly and egress.
  • Limited high-resolution structural data of M proteins hinders antiviral development.

Purpose of the Study:

  • To elucidate the molecular mechanisms of paramyxovirus M protein interaction with host cell membranes.
  • To understand how M protein binding to lipids influences viral assembly and budding.
  • To provide structural insights for designing novel antiviral therapies.

Main Methods:

  • X-ray crystallography to determine M protein structure.
  • Electron microscopy for visualizing M protein complexes and virions.
  • Molecular dynamics simulations to analyze protein-lipid interactions and conformational changes.

Main Results:

  • Paramyxovirus M proteins were found to associate with phosphatidylserine and PI(4,5)P2 at the plasma membrane.
  • PI(4,5)P2 binding induces significant conformational and electrostatic alterations on the M protein surface.
  • These M protein changes trigger membrane deformation, matrix layer polymerization, and subsequent virion assembly.

Conclusions:

  • M protein interaction with PI(4,5)P2 is a critical step in paramyxovirus replication.
  • Understanding these lipid-binding dynamics provides a basis for developing targeted antiviral strategies.
  • Structural and mechanistic insights advance the field of paramyxovirus research and therapeutic intervention.

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