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Readers of PCNA modifications.

Helle D Ulrich1, Diane T Takahashi

  • 1Clare Hall Laboratories, Cancer Research UK London Research Institute, Blanche Lane, South Mimms EN6 3LD, UK. h.ulrich@imb-mainz.de

Chromosoma
|April 13, 2013
PubMed
Summary
This summary is machine-generated.

Proliferating cell nuclear antigen (PCNA) is modified by posttranslational modifications (PTMs) that regulate DNA replication and repair. This review details how these PTMs are recognized by effector proteins, influencing cellular processes.

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • Proliferating cell nuclear antigen (PCNA) is a eukaryotic sliding clamp crucial for DNA transactions.
  • PCNA coordinates DNA replication, repair, chromatin dynamics, and cell cycle regulation.
  • Posttranslational modifications (PTMs) like ubiquitylation, sumoylation, phosphorylation, and acetylation expand PCNA's functions.

Purpose of the Study:

  • To review the current understanding of how PCNA's PTMs are recognized by downstream effector proteins.
  • To elucidate the role of PCNA modifications in mediating DNA replication and repair pathways.
  • To highlight PCNA modifications as a model for studying biological signaling via PTMs.

Main Methods:

  • Literature review of studies on PCNA posttranslational modifications.
  • Analysis of effector proteins that interact with modified PCNA.
  • Synthesis of knowledge on PCNA's role in DNA replication, repair, and cell cycle regulation.

Main Results:

  • PTMs significantly alter PCNA's activity and interaction partners.
  • Modified PCNA regulates lesion bypass during DNA replication.
  • PCNA modifications are involved in homologous recombination and interstrand cross-link repair pathways.

Conclusions:

  • PCNA PTMs are critical for diverse DNA processing events.
  • Effector proteins 'read' PCNA modifications to elicit specific cellular responses.
  • The PCNA modification system serves as a paradigm for understanding PTM-mediated signaling.