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Identification of Cyclin-dependent Kinase 1 Specific Phosphorylation Sites by an In Vitro Kinase Assay
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Identification of Cyclin-dependent Kinase 1 Specific Phosphorylation Sites by an In Vitro Kinase Assay

Published on: May 3, 2018

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Greatwall kinase at a glance

Anna Castro1, Thierry Lorca1

  • 1Centre de Recherche de Biologie cellulaire de Montpellier (CRBM), CNRS UMR 5237, Université de Montpellier, 1919 Route de Mende, 34293 Montpellier cedex 5, France Thierry.lorca@crbm.cnrs.fr anna.castro@crbm.cnrs.fr.

Journal of Cell Science
|October 26, 2018
PubMed

Insights

The Greatwall (Gwl) kinase pathway, through Arpp19 and ENSA proteins, inhibits PP2A-B55 phosphatase, ensuring proper cell division timing. This pathway is crucial for mitosis and is influenced by nutrients and cancer.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Mitosis regulation involves a balance between kinase and phosphatase activities.
  • Cyclin-B-Cdk1 and PP2A-B55 are key regulators of mitotic progression.
  • The Greatwall (Gwl) kinase pathway modulates PP2A-B55 activity.

Purpose of the Study:

  • To elucidate the regulation of Gwl kinase in space and time.
  • To understand the role of the Gwl-Arpp19-ENSA-PP2A-B55 pathway in cell cycle control.
  • To explore Gwl's influence on oncogenic properties and nutrient deprivation.

Main Methods:

  • Review of existing literature and research findings.
  • Analysis of signaling pathways involved in mitosis.
  • Discussion of Gwl's regulatory mechanisms and cellular functions.

Main Results:

  • Gwl phosphorylates Arpp19 and ENSA, inhibiting PP2A-B55.
  • This inhibition is critical for the timely progression of M and S phases.
  • The Gwl pathway's activity is influenced by nutrient availability and cellular context.

Conclusions:

  • The Gwl-Arpp19-ENSA-PP2A-B55 pathway is essential for accurate cell division across species.
  • Gwl's modulation of this pathway impacts cell proliferation and oncogenesis.
  • Understanding Gwl regulation offers insights into cell cycle control and cancer therapeutics.
Keywords:
CancerGreatwallMastlMeiosisMitosis

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