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Resetting a functional G1 nucleus after mitosis.

Ines J de Castro1, Ezgi Gokhan1, Paola Vagnarelli2

  • 1College of Health and Life Science, Research Institute of Environment Health and Society, Brunel University London, Uxbridge, UB8 3PH, UK.

Chromosoma
|January 6, 2016
PubMed
Summary
This summary is machine-generated.

Cellular information maintenance requires re-establishing epigenetic changes and protein interactions after cell division. Phosphatases during mitotic exit restore a functional G1 nucleus by reversing mitotic phosphorylations.

Keywords:
Cell divisionChromatinMitotic exitNuclear envelopePhosphatases

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Genetics

Background:

  • Cellular information maintenance extends beyond genetic code transmission.
  • Epigenetic changes, topological cues, and protein interactions must be re-established post-cell division.
  • Mitotic exit initiates the restoration of a functional G1 nucleus for the subsequent cell cycle.

Purpose of the Study:

  • To review recent developments in phosphatase control during mitotic exit.
  • To summarize known phosphatase substrates involved in mitotic exit.
  • To highlight key steps in restoring chromatin status, nuclear envelope, and nuclear bodies in vertebrates.

Main Methods:

  • Literature review focusing on vertebrate systems.
  • Analysis of recent developments in phosphatase regulation.
  • Synthesis of findings on phosphatase substrates and their roles.

Main Results:

  • Mitotic exit involves inactivation of mitotic kinases and reversal of phosphorylation.
  • Phosphatases play crucial, spatially and temporally controlled roles in reversing phosphorylations.
  • Key events include chromatin decondensation, nuclear envelope reassembly, and nuclear body reorganization.

Conclusions:

  • Phosphatase activity is central to the timely restoration of a functional G1 nucleus.
  • Understanding phosphatase control during mitotic exit is vital for cell cycle regulation.
  • The review focuses on the vertebrate system due to differences in mitotic exit networks compared to yeast.