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Updated: May 23, 2025

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EBNA1.

Lori Frappier1

  • 1Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada. lori.frappier@utoronto.ca.

Current Topics in Microbiology and Immunology
|May 21, 2025
PubMed
Summary
This summary is machine-generated.

Epstein-Barr virus nuclear antigen 1 (EBNA1) is crucial for viral genome persistence and impacts viral replication. EBNA1 also influences cellular pathways, potentially contributing to EBV-associated cancers.

Keywords:
DNA bindingDNA replicationImmune evasionMitotic segregationPML bodiesTranscriptional activationUSP7

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Area of Science:

  • Virology
  • Molecular Biology
  • Oncology

Background:

  • Epstein-Barr virus (EBV) establishes lifelong latent infections in humans.
  • EBV nuclear antigen 1 (EBNA1) is a key viral protein essential for maintaining the viral genome during latency.
  • EBNA1's roles extend beyond latency, influencing EBV lytic replication and cellular processes.

Purpose of the Study:

  • To elucidate the multifaceted roles of EBNA1 in EBV infection.
  • To investigate EBNA1's interactions with viral and cellular components.
  • To explore EBNA1's contribution to oncogenesis in EBV-associated tumors.

Main Methods:

  • Analysis of EBNA1's function in EBV latent infection.
  • Investigation of EBNA1's impact on EBV lytic infection.
  • Examination of EBNA1's interactions with cellular proteins and DNA.
  • Assessment of EBNA1's role in cellular pathway modulation.

Main Results:

  • EBNA1 is indispensable for the stable persistence of EBV genomes during latency.
  • EBNA1 activates the expression of other EBV latency genes via DNA sequence interactions.
  • EBNA1 modulates cellular pathways through interactions with cellular proteins and DNA sites.
  • These cellular effects are linked to viral persistence, cell survival, and oncogenesis.

Conclusions:

  • EBNA1 is a critical determinant of EBV persistence and replication.
  • EBNA1's interaction with cellular machinery highlights its role in viral pathogenesis.
  • EBNA1 is directly implicated in the development of EBV-associated cancers.