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Daxx, a broad-spectrum viral restriction factor.

Sarah Maillet1, Sébastien Nisole1

  • 1Université Paris Descartes, Unité Inserm UMR 1124, 45, rue des Saints-Pères, 75006 Paris, France, Centre d'études d'agents pathogènes et biotechologies pour la santé (CPBS) CNRS FRE3689, Université de Montpellier 1919, route de Mende 34293 Montpellier cedex 5, France.

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Summary

Daxx protein plays a crucial role in antiviral defense by repressing viral replication. Viruses have evolved strategies to overcome Daxx-mediated restriction, impacting their replication cycles.

Keywords:
DaxxPML nuclear bodiesSUMOylationrestriction factortranscriptional repression

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Area of Science:

  • Molecular Biology
  • Virology
  • Cell Biology

Background:

  • Daxx is a nuclear protein primarily localized in PML nuclear bodies.
  • It functions in transcriptional repression and cellular processes.
  • Daxx is implicated in antiviral defense against various viruses.

Purpose of the Study:

  • To review the antiviral activities of Daxx.
  • To discuss viral strategies for escaping Daxx-mediated restriction.
  • To highlight Daxx's role in retroviral replication, including HIV-1.

Main Methods:

  • Literature review of studies on Daxx and viral interactions.
  • Analysis of Daxx's mechanisms in transcriptional repression.
  • Examination of viral evasion strategies targeting Daxx.

Main Results:

  • Daxx exhibits broad antiviral activities, restricting herpesviruses, adenoviruses, and retroviruses.
  • Viruses have developed sophisticated mechanisms to counteract Daxx's antiviral functions.
  • Daxx is a significant factor in controlling retroviral replication.

Conclusions:

  • Daxx is a key host factor in innate antiviral immunity.
  • Understanding Daxx-viral interactions is crucial for developing antiviral therapies.
  • Viral subversion of Daxx function is a common theme in pathogenesis.