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Human APE/Ref-1 protein.

G Fritz1

  • 1Division of Applied Toxicology, Institute of Toxicology, Obere Zahlbacher Str. 67, D-55131 Mainz, Germany. fritz@mail.uni-mainz.de

The International Journal of Biochemistry & Cell Biology
|November 21, 2000
PubMed
Summary
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Human apurinic/apyrimidinic endonuclease/redox-factor 1 (APE/Ref-1) repairs DNA and regulates genes. Targeting APE/Ref-1 offers a novel therapeutic strategy for combating tumors by modulating its activity.

Area of Science:

  • Molecular Biology
  • Biochemistry
  • Genetics

Background:

  • Human apurinic/apyrimidinic endonuclease/redox-factor 1 (APE/Ref-1) is a multifunctional protein involved in DNA repair and gene transcription.
  • This protein plays a crucial role in cellular responses to oxidative stress, protecting cells from damaging oxidizing agents.

Purpose of the Study:

  • To elucidate the dual role of APE/Ref-1 in DNA repair and transcriptional regulation.
  • To explore the potential of targeting APE/Ref-1 activity as a novel therapeutic strategy in cancer treatment.

Main Methods:

  • The study focuses on the functional domains of APE/Ref-1, specifically the C-terminal repair region and the N-terminal redox-active fragment.
  • Emphasis is placed on the importance of Cys-65 in the redox-based activation of transcription factors.

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Main Results:

  • APE/Ref-1 possesses distinct functional regions: the C-terminus for DNA repair and the N-terminus (involving Cys-65) for transcriptional regulation via redox mechanisms.
  • The protein is integral to cellular defense against oxidative stress and its genotoxic effects.

Conclusions:

  • APE/Ref-1's multifunctional nature highlights its significance in maintaining genomic stability and cellular function.
  • Downmodulating APE/Ref-1 activity presents a promising novel therapeutic avenue for tumor therapy.