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Joining the PARty: PARP Regulation of KDM5A during DNA Repair (and Transcription?)

Anthony Sanchez1, Bethany A Buck-Koehntop2, Kyle M Miller1,3

  • 1Department of Molecular Biosciences, The University of Texas at Austin, Austin, TX, 78712, The University of Texas at Austin, Austin, Texas, USA.

Bioessays : News and Reviews in Molecular, Cellular and Developmental Biology
|May 9, 2022
PubMed

Insights

The lysine demethylase KDM5A, a known transcriptional regulator, is revealed to play a crucial role in DNA repair by interacting with PARP1 and macroH2A1.2. This discovery highlights new therapeutic targets for cancer by understanding how KDM5A coordinates genome integrity.

Area of Science:

  • Molecular Biology
  • Epigenetics
  • Genomics

Background:

  • The lysine demethylase KDM5A is recognized for its role in transcriptional regulation.
  • Emerging evidence suggests KDM5A's involvement in DNA repair pathways.
  • Chromatin modifiers play critical roles in maintaining genome integrity.

Purpose of the Study:

  • To elucidate the molecular mechanisms of the PARP1-macroH2A1.2-KDM5A axis in DNA damage response.
  • To explore the dual roles of KDM5A in DNA repair and transcription.
  • To investigate the potential of targeting multitasking chromatin proteins in cancer therapy.

Main Methods:

  • Review of existing literature on KDM5A, PARP1, and macroH2A1.2 interactions.
  • Analysis of KDM5A's novel binding mode to poly(ADP-ribose) (PAR) chains.
  • Discussion of the coordination of chromatin proteins in DNA repair processes.

Main Results:

  • KDM5A interacts with PARP1 and macroH2A1.2 to facilitate DNA repair.
  • KDM5A utilizes a previously uncharacterized coiled-coil domain to bind PAR chains at damage sites.
  • This interaction represents a novel mechanism for PAR binding.

Conclusions:

  • The PARP1-macroH2A1.2-KDM5A axis is a key regulator of DNA damage response.
  • Multifunctional chromatin proteins like KDM5A coordinate genome and epigenome integrity.
  • Dysregulation of these pathways in cancer presents therapeutic opportunities.
Keywords:
DNA double-strand breaksDNA repairKDM5APARPchromatinhistone demethylationpoly (ADP-ribose)

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