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What goes on must come off: phosphatases gate-crash the DNA damage response

Dong-Hyun Lee1, Dipanjan Chowdhury

  • 1Department of Radiation Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA. dipanjan_chowdhury@dfci.harvard.edu

Trends in Biochemical Sciences
|September 21, 2011
PubMed

Insights

Phosphatases are crucial for DNA repair by dephosphorylating repair proteins, restoring cell division. This study highlights their pivotal roles in DNA damage response signaling networks.

Area of Science:

  • Molecular Biology
  • Cellular Signaling
  • Biochemistry

Background:

  • DNA damage triggers complex signaling cascades, primarily focusing on kinases.
  • The role of phosphatases in restoring phosphorylation balance during DNA repair has been historically understudied.
  • Recent phosphoproteomic and genetic screening advances reveal phosphatases' critical involvement in DNA damage response.

Purpose of the Study:

  • To review and summarize current knowledge on serine/threonine phosphatases in DNA repair.
  • To highlight the importance of dephosphorylation in DNA repair efficiency and cell cycle progression.
  • To explore and speculate on the uninvestigated functions of phosphatases in DNA damage response.

Main Methods:

  • Literature review of recent findings on phosphatases and DNA repair.
  • Analysis of phosphoproteomic data and genetic screening results.
  • Synthesis of existing knowledge to propose new research directions.

Main Results:

  • Dephosphorylation by phosphatases is essential for effective DNA repair.
  • Phosphatases facilitate the timely dephosphorylation of DNA repair factors.
  • Restoration of phosphorylation balance by phosphatases is critical for cell cycle restart post-DNA repair.

Conclusions:

  • Serine/threonine phosphatases play pivotal roles in DNA damage response signaling.
  • Further investigation into the specific functions and targets of phosphatases in DNA repair is warranted.
  • Understanding phosphatase activity is key to comprehending the complete DNA damage response.

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