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Updated: Dec 17, 2025

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

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Cyclin-Dependent Kinase-Like 5 (CDKL5): Possible Cellular Signalling Targets and Involvement in CDKL5 Deficiency

Syouichi Katayama1,2, Noriyuki Sueyoshi2, Tetsuya Inazu1

  • 1Department of Pharmacy, College of Pharmaceutical Sciences, Ritsumeikan University, Shiga 525-8577, Japan.

Neural Plasticity
|June 27, 2020
PubMed

Insights

Cyclin-dependent kinase-like 5 (CDKL5) mutations cause CDKL5 deficiency disorder (CDD), a neurodevelopmental condition. Understanding CDKL5

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Genetics

Background:

  • Cyclin-dependent kinase-like 5 (CDKL5) is a serine/threonine kinase identified on the human X chromosome.
  • Mutations in CDKL5 are linked to CDKL5 deficiency disorder (CDD), a neurodevelopmental disorder distinct from Rett syndrome.
  • CDKL5's role in neuronal function is critical, with mutations causing loss of enzymatic activity.

Purpose of the Study:

  • To review recent findings on CDKL5 substrates and its phosphorylation regulation.
  • To explore the relationship between CDKL5 signaling pathways and CDKL5 knockout mouse phenotypes.
  • To discuss future therapeutic strategies for CDD and related neurological disorders.

Main Methods:

  • Literature review of studies on CDKL5 phosphorylation.
  • Analysis of substrate characteristics and regulatory mechanisms.
  • Discussion of findings from CDKL5 knockout mouse models.

Main Results:

  • CDKL5 mutations lead to loss of catalytic function, implicating its activity in CDD pathogenesis.
  • Phosphorylation and dephosphorylation are key regulatory mechanisms for CDKL5 activity.
  • Alterations in CDKL5 phosphorylation pathways correlate with observed phenotypes in knockout mice.

Conclusions:

  • Understanding CDKL5 substrate interactions and regulatory mechanisms is crucial for developing targeted therapies.
  • CDKL5's enzymatic activity is strongly associated with CDD.
  • Further research into CDKL5 signaling pathways offers promise for treating neurodevelopmental disorders.

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