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Poly(ADP-ribose) polymerases: managing genome stability.

Mirella L Meyer-Ficca1, Ralph G Meyer, Elaine L Jacobson

  • 1Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ 85724, USA.

The International Journal of Biochemistry & Cell Biology
|March 4, 2005
PubMed
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Poly(ADP-ribose) metabolism, involving PARP-1 and PARG, is crucial for genomic integrity and cell repair after DNA damage. This process also impacts cell division, intracellular trafficking, and diseases of aging.

Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Poly(ADP-ribose) metabolism is vital for maintaining genomic stability after genotoxic stress.
  • Poly(ADP-ribose) polymerase-1 (PARP-1) and poly(ADP-ribose) glycohydrolase (PARG) are key enzymes in cellular responses to DNA damage.
  • Poly(ADP-ribosyl)ation is a widespread biological mechanism in eukaryotes.

Purpose of the Study:

  • To review the roles of PARP and PARG enzymes in cellular processes.
  • To highlight the significance of PARP-1 in DNA repair and genomic integrity.
  • To explore the connection between poly(ADP-ribosyl)ation and diseases like cancer and aging.

Main Methods:

  • Literature review focusing on PARP and PARG enzymes.
  • Analysis of established and emerging data on poly(ADP-ribosyl)ation.

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  • Emphasis on PARP-1 as the most studied PARP family member.

    • Main Results:

    • Poly(ADP-ribosyl)ation promotes recovery from genotoxic stress and eliminates damaged cells.
    • This mechanism ensures accurate genetic transmission during cell division.
    • Emerging evidence links poly(ADP-ribosyl)ation to intracellular trafficking and memory formation.

    Conclusions:

    • PARP-1 and PARG are central to DNA repair and genomic maintenance.
    • Poly(ADP-ribosyl)ation is a fundamental biological process with broad cellular functions.
    • Dysregulation of poly(ADP-ribosyl)ation is implicated in cancer and aging-related diseases.