Related Experiment Video
Updated: Sep 30, 2025
12:26
Identification of Cyclin-dependent Kinase 1 Specific Phosphorylation Sites by an In Vitro Kinase Assay
Published on: May 3, 2018
18.8K
Functional characterization of the human Cdk10/Cyclin Q complex.
Robert Düster1, Yanlong Ji2,3,4, Kuan-Ting Pan3,4
1Institute of Structural Biology, University of Bonn, Venusberg-Campus 1, 53127 Bonn, Germany.
Open Biology
|March 16, 2022
Summary
Cyclin-dependent kinase 10 (Cdk10) regulates cell cycle and transcription. This study identifies its substrates and phosphosites, revealing its role in neural development and tumor suppression.
Area of Science:
- Molecular Biology
- Cell Biology
- Biochemistry
Background:
- Cyclin-dependent kinases (CDKs) are crucial regulators of cell cycle and transcription.
- Cdk10's role in neural development and tumor suppression is established, but its molecular mechanisms remain unclear.
Purpose of the Study:
- To elucidate the substrate specificity and function of Cdk10.
- To identify novel Cdk10 substrates and regulatory interactions.
Main Methods:
- Recombinant Cdk10/CycQ protein complex used for in vitro substrate characterization.
- Analogue-sensitive mutant kinase employed to identify in vivo phosphosites in HEK cells.
- In vitro kinase assays to assess inhibition by CDK inhibitors and cross-phosphorylation by other CDKs.
Main Results:
- Cdk10 phosphorylates RNA pol II CTD, c-MYC, and RB1 in vitro.
- Identified 89 Cdk10 phosphosites on 66 proteins involved in cell cycle, translation, stress response, growth signaling, and transcriptional regulation.
- Cdk10 is a substrate of Cdk1 and Cdk5, suggesting cross-talk between these kinases.
Conclusions:
- Cdk10 plays a hybrid role in both cell cycle and transcriptional regulation.
- This functional characterization provides insights into Cdk10's involvement in neural development and tumor suppression.
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