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Related Experiment Videos

Retrovirus budding.

Dimiter G Demirov1, Eric O Freed

  • 1Virus-Cell Interaction Section, HIV Drug Resistance Program, National Cancer Institute at Frederick, Bldg. 535/Rm. 124, Frederick, MD 21702-1201, USA.

Virus Research
|November 30, 2004
PubMed
Summary
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Retrovirus particle release is enhanced by late (L) domains in Gag proteins, which interact with the host multivesicular body (MVB) pathway. This review details L domain discovery and their role in viral release and endosomal sorting.

Area of Science:

  • Virology
  • Molecular Biology
  • Cell Biology

Background:

  • Retrovirus particle release is crucial for viral propagation.
  • Late (L) domains within the Gag precursor protein are known to stimulate this release.
  • Three main classes of L domains (PTAP, PPXY, YPX L) have been identified.

Purpose of the Study:

  • To review the discovery and characterization of retroviral L domains.
  • To elucidate the functional relationship between L domains and the host endosomal sorting machinery.
  • To highlight the connection between L domain activity, viral release, and the multivesicular body (MVB) pathway.

Main Methods:

  • Literature review of studies on L domains and retrovirus release.
  • Analysis of the interaction between L domains and cellular protein sorting machinery.

Related Experiment Videos

  • Examination of the role of the multivesicular body (MVB) pathway in viral egress.

    • Main Results:

    • L domains function by engaging host ESCRT machinery components.
    • Specific L domain motifs (PTAP, PPXY, YPX L) mediate interactions with cellular sorting factors.
    • The MVB pathway is a critical host factor hijacked by retroviruses for particle release.

    Conclusions:

    • Retrovirus L domains are key regulators of viral particle release.
    • Understanding L domain function provides insights into host-pathogen interactions.
    • Targeting L domain-MVB interactions could offer antiviral strategies.