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In vitro Uncoating of HIV-1 Cores
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DNA virus uncoating.

Samuel Kilcher1, Jason Mercer1

  • 1MRC-Laboratory for Molecular Cell Biology, University College London, Gower Street, London WC1E 6BT United Kingdom.

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|March 3, 2015
PubMed
Summary
This summary is machine-generated.

Virus capsids protect viral genomes. This study compares DNA virus uncoating, revealing how chemical and mechanical cues trigger capsid disassembly for genome release and replication.

Keywords:
Capsid primingEndocytosisFusionViral genome releaseVirus entry

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Area of Science:

  • Virology
  • Structural Biology
  • Molecular Biology

Background:

  • Viruses package their genomes within protective protein shells called capsids.
  • Capsid disassembly, or uncoating, is essential for viral infection, releasing the genome inside host cells.
  • Understanding uncoating mechanisms is key to developing antiviral strategies.

Purpose of the Study:

  • To compare the uncoating mechanisms of diverse DNA viruses.
  • To elucidate the chemical and mechanical triggers of viral capsid disassembly.
  • To understand how capsid conformational changes facilitate genome release for replication.

Main Methods:

  • Comparative analysis of uncoating pathways across different DNA virus families (pox-, herpes-, adeno-, polyoma-, and papillomaviruses).
  • Review of structural and biochemical studies on viral capsid disassembly.
  • Analysis of the role of environmental cues (pH, ions, mechanical stress) in triggering conformational changes.

Main Results:

  • Identified conserved and distinct features in the uncoating programs of various DNA viruses.
  • Highlighted specific chemical and mechanical signals that initiate capsid conformational changes.
  • Demonstrated how stepwise disassembly ensures timely and spatially regulated genome release.

Conclusions:

  • Viral uncoating is a highly regulated process involving specific molecular triggers and conformational changes.
  • Comparative analysis provides insights into the evolution and diversity of viral entry mechanisms.
  • Targeting uncoating pathways offers potential for novel antiviral therapies.