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Related Experiment Videos

Functional interaction between human papillomavirus type 18 E2 and poly(ADP-ribose) polymerase 1.

Daeyoup Lee1, Jin Woo Kim, Karam Kim

  • 1Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea.

Oncogene
|August 20, 2002
PubMed
Summary

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Poly (ADP-ribose) polymerase (PARP) positively regulates human papillomavirus type 18 E2 protein. PARP enhances E2-dependent transcription and DNA binding, acting as a co-activator.

Area of Science:

  • Molecular Biology
  • Virology
  • Biochemistry

Background:

  • Human papillomavirus (HPV) E2 protein regulates viral gene expression and DNA replication.
  • Understanding the regulation of HPV E2 is crucial for developing antiviral strategies.

Purpose of the Study:

  • To investigate the role of Poly (ADP-ribose) polymerase (PARP) in regulating HPV-18 E2 protein function.
  • To elucidate the interaction domains between PARP and HPV-18 E2.

Main Methods:

  • In vitro interaction assays to map binding domains.
  • Overexpression studies to assess transcriptional activity.
  • Gel retardation assays to evaluate DNA binding.
  • Chromatin immunoprecipitation (ChIP) assays to confirm in vivo recruitment.

Related Experiment Videos

Main Results:

  • PARP directly interacts with the COOH-terminal region of HPV-18 E2.
  • The interaction domain in PARP includes the NH(2)-terminal zinc finger and BRCT motifs.
  • PARP overexpression stimulates E2-dependent transcription.
  • PARP enhances the in vitro DNA binding activity of E2.
  • PARP-1 is recruited to E2-dependent promoters in vivo.

Conclusions:

  • PARP acts as a positive regulator and transcriptional co-activator for HPV-18 E2.
  • PARP's interaction with E2 enhances viral transcription and DNA binding.
  • These findings reveal a novel regulatory mechanism in HPV infection.