Allostery governs Cdk2 activation and differential recognition of CDK inhibitors
| Autor: | Abir Majumdar, Gianluigi Veglia, Andrew R. Thompson, Tiffany A. Engel, Manu Veliparambil Subrahmanian, Nicholas M. Levinson, David D. Thomas, Joseph M. Muretta, David J. Burban, Damien M. Rasmussen |
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| Rok vydání: | 2019 |
| Předmět: |
Allosteric regulation
Cell Cycle Proteins Cyclin A Models Biological Article 03 medical and health sciences Allosteric Regulation Cyclin-dependent kinase Cyclins Proto-Oncogene Proteins Humans Phosphorylation Molecular Biology Protein Kinase Inhibitors 030304 developmental biology Cyclin 0303 health sciences Cyclin binding biology Chemistry Kinase Tumor Suppressor Proteins 030302 biochemistry & molecular biology Cyclin-dependent kinase 2 Cell Cycle Cyclin-Dependent Kinase 2 Cell Biology Cell cycle Cyclin-Dependent Kinases Cell biology enzymes and coenzymes (carbohydrates) biology.protein biological phenomena cell phenomena and immunity Microtubule-Associated Proteins Allosteric Site |
| Zdroj: | Nature chemical biology |
| ISSN: | 1552-4469 |
| Popis: | Cyclin-dependent kinases (CDKs) are the master regulators of the eukaryotic cell cycle. To become activated, CDKs require both regulatory phosphorylation and binding of a cognate cyclin subunit. We studied the activation process of the G1/S kinase Cdk2 in solution and developed a thermodynamic model that describes the allosteric coupling between regulatory phosphorylation, cyclin binding, and inhibitor binding. The results explain why monomeric Cdk2 lacks activity despite sampling an active-like state, reveal that regulatory phosphorylation enhances allosteric coupling with the cyclin subunit, and show that this coupling underlies differential recognition of Cdk2 and Cdk4 inhibitors. We identify an allosteric hub that has diverged between Cdk2 and Cdk4 and show that this hub controls the strength of allosteric coupling. The altered allosteric wiring of Cdk4 leads to compromised activity toward generic peptide substrates, and comparative specialization toward its primary substrate Retinoblastoma (RB). |
| Databáze: | OpenAIRE |
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