Positive Regulator Molecules
Positive Regulator Molecules
Inhibition of Cdk Activity
M-Cdk Drives Transition Into Mitosis
Anaphase Promoting Complex
Separation of Sister Chromatids
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Updated: Dec 22, 2025

Identification of Cyclin-dependent Kinase 1 Specific Phosphorylation Sites by an In Vitro Kinase Assay
Published on: May 3, 2018
Nathan Palmer1, Philipp Kaldis2
1Institute of Molecular and Cell Biology (IMCB), A⁎STAR (Agency for Science, Technology and Research), 61 Biopolis Drive, Proteos, Singapore, 138673, Republic of Singapore; National University of Singapore (NUS), Department of Biochemistry, Singapore, 117597, Republic of Singapore.
Cyclin-dependent kinases (CDKs) are best known for their role in cell division, but they also have important functions in DNA damage response. This study explores how CDK/cyclin complexes act as both targets of DNA damage signals and effectors of DNA repair. The authors also consider the possibility that cyclins can function independently of CDKs in these processes. These findings suggest that cyclins have a broader role in maintaining genome stability than previously recognized. The study highlights the need for more research into cyclin functions in DNA damage and cancer.
10:33Development of Inhibitors of Protein-protein Interactions through REPLACE: Application to the Design and Development Non-ATP Competitive CDK Inhibitors
Published on: October 26, 2015
13:15Experimental Approaches to Study Mitochondrial Localization and Function of a Nuclear Cell Cycle Kinase, Cdk1
Published on: February 25, 2016
Area of Science:
Background:
Cyclin-dependent kinases (CDKs) are primarily recognized for their role in cell cycle progression. However, their functions extend beyond mitotic regulation. Cyclins, which activate CDKs, influence substrate specificity and resistance to inhibition. While much is known about CDK/cyclin complexes in cell division, their roles in DNA damage response remain underexplored. Prior research has established their involvement in checkpoint signaling and DNA repair. Yet, the dual nature of these complexes as both targets and effectors of DNA damage remains unclear. Additionally, cyclins may function independently of CDKs in these processes. This uncertainty motivates a deeper investigation into cyclin/CDK roles in DNA damage. Understanding these functions could improve insights into how cell cycle proteins contribute to genome stability.
Purpose Of The Study:
This study aims to examine the less-studied roles of CDK/cyclin complexes in DNA damage response. The authors focus on how these complexes act as both targets of checkpoint signaling and effectors of DNA repair. They also explore cyclin functions that do not require CDK activity. The goal is to highlight these underappreciated roles in the broader context of DNA damage. By analyzing cyclin/CDK interactions, the study seeks to clarify their contribution to genome stability. The authors emphasize the need to understand cyclins as independent regulators. This approach may reveal new aspects of cyclin function in cellular stress responses. The findings could contribute to a more comprehensive view of cell cycle regulation in DNA repair.
Main Methods:
The study reviews existing literature on CDK/cyclin complexes and their roles in DNA damage. It synthesizes findings from prior research on cyclin/CDK interactions. The authors examine how these complexes are regulated by DNA damage signals. They also assess the evidence for cyclin activity independent of CDKs. The analysis includes a focus on cyclin roles in DNA repair pathways. The study evaluates how cyclin/CDK complexes influence genome stability. It considers the implications of these findings for human diseases like cancer. The synthesis of evidence aims to clarify the dual roles of these complexes in DNA damage response.
Main Results:
CDK/cyclin complexes serve as both targets and effectors in DNA damage response. Cyclins influence the activity of these complexes in DNA repair pathways. Evidence suggests that cyclins can function independently of CDKs in these processes. The complexes are modulated by DNA damage checkpoint signaling. Their roles in DNA repair are distinct from their functions in cell cycle progression. The study highlights the dual nature of cyclin/CDK activity in DNA damage. These findings suggest a broader regulatory role for cyclins in genome stability. The results emphasize the need to study cyclin functions beyond CDK activation.
Conclusions:
The study concludes that CDK/cyclin complexes have important roles in DNA damage response. These complexes act as both targets and effectors of DNA damage signaling. The authors propose that cyclins may function independently of CDKs in these processes. This dual functionality suggests a more complex regulatory network than previously understood. The findings support the idea that cyclins contribute to genome stability. The study highlights the need for further research into cyclin/CDK roles in DNA repair. These results may inform future studies on DNA damage and cancer. The authors suggest that cyclin functions in DNA damage response deserve more attention.
CDK/cyclin complexes act as both targets of DNA damage checkpoint signaling and effectors of DNA repair.
Yes, the study suggests cyclins may function independently of CDKs in DNA repair processes.
Cyclins are traditionally studied in the context of CDK activation, which has led to limited focus on their independent roles.
These complexes modulate DNA repair pathways and are regulated by DNA damage checkpoint signaling.
Dysfunction in these complexes may contribute to genome instability, a hallmark of cancer.
The authors propose that cyclin functions in DNA damage response require further investigation.