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Updated: May 16, 2026

Identification of Cyclin-dependent Kinase 1 Specific Phosphorylation Sites by an In Vitro Kinase Assay
Published on: May 3, 2018
On the molecular mechanisms of mitotic kinase activation
Richard Bayliss1, Andrew Fry, Tamanna Haq
1Department of Biochemistry, Henry Wellcome Laboratories for Structural Biology, University of Leicester, Lancaster Road, Leicester LE1 9HN, UK. richard.bayliss@le.ac.uk
Abstract:
During mitosis, human cells exhibit a peak of protein phosphorylation that alters the behaviour of a significant proportion of proteins, driving a dramatic transformation in the cell's shape, intracellular structures and biochemistry. These mitotic phosphorylation events are catalysed by several families of protein kinases, including Auroras, Cdks, Plks, Neks, Bubs, Haspin and Mps1/TTK. The catalytic activities of these kinases are activated by phosphorylation and through protein-protein interactions. In this review, we summarize the current state of knowledge of the structural basis of mitotic kinase activation mechanisms. This review aims to provide a clear and comprehensive primer on these mechanisms to a broad community of researchers, bringing together the common themes, and highlighting specific differences. Along the way, we have uncovered some features of these proteins that have previously gone unreported, and identified unexplored questions for future work. The dysregulation of mitotic kinases is associated with proliferative disorders such as cancer, and structural biology will continue to play a critical role in the development of chemical probes used to interrogate disease biology and applied to the treatment of patients.
Insights
Mitotic protein kinases are activated by phosphorylation, driving cell shape changes during mitosis. Understanding their structural activation mechanisms is key for cancer research and developing new treatments.
Area of Science:
- Cell Biology
- Structural Biology
- Biochemistry
Background:
- Mitosis involves significant protein phosphorylation, altering cell structure and function.
- Key protein kinases like Auroras, Cdks, and Plks drive these mitotic changes.
- Kinase activation relies on phosphorylation and protein-protein interactions.
Purpose of the Study:
- To review the structural basis of mitotic kinase activation mechanisms.
- To provide a comprehensive primer for researchers on these mechanisms.
- To highlight common themes and specific differences in kinase activation.
Main Methods:
- Literature review of structural biology studies on mitotic kinases.
- Analysis of protein phosphorylation and interaction data.
- Comparative analysis of kinase activation pathways.
Main Results:
- Detailed summary of structural insights into mitotic kinase activation.
- Identification of common and unique activation strategies across kinase families.
- Unreported features of some mitotic kinases.
Conclusions:
- Structural biology is crucial for understanding mitotic kinase regulation.
- Dysregulation of these kinases is linked to cancer.
- Further structural studies will aid in developing targeted cancer therapies.
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