Related Experiment Video
Updated: Aug 9, 2026

Studying Proteolysis of Cyclin B at the Single Cell Level in Whole Cell Populations
Published on: September 17, 2012
Roughex mediates G(1) arrest through a physical association with cyclin A
S N Avedisov1, I Krasnoselskaya, M Mortin
1Laboratory of Biochemistry, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892-4255, USA.
Roughex protein physically interacts with cyclin A, influencing its nuclear localization and degradation. This interaction inhibits cyclin A-dependent kinase activity, defining Roughex as a specialized cell cycle inhibitor.
Area of Science:
- Cell Biology
- Developmental Biology
- Genetics
Background:
- Cell cycle progression is crucial for tissue development.
- Proper regulation of cyclin A is essential for cell cycle control.
Purpose of the Study:
- To investigate the interaction between Roughex and cyclin A.
- To elucidate the role of Roughex in regulating cyclin A during cell cycle progression.
Main Methods:
- In vivo co-expression and co-immunoprecipitation assays.
- Immunofluorescence microscopy to determine protein localization.
- Histone H1 kinase assays and two-hybrid experiments.
Main Results:
- Roughex and cyclin A physically interact in Drosophila eye imaginal disk cells.
- Roughex promotes nuclear localization and subsequent degradation of cyclin A.
- Roughex inhibits cyclin A-Cdc2 and cyclin A-Cdc2c kinase activities.
Conclusions:
- Roughex influences cyclin A intracellular distribution.
- Roughex acts as a specialized inhibitor of cyclin A-dependent kinase activity.
- This mechanism is critical for cell cycle synchronization during Drosophila eye development.
More Related Videos
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
08:33Combining Mitotic Cell Synchronization and High Resolution Confocal Microscopy to Study the Role of Multifunctional Cell Cycle Proteins During Mitosis
Published on: December 5, 2017
Related Concept Videos
Positive Regulator Molecules
Negative Regulator Molecules
Positive Regulator Molecules
Inhibition of Cdk Activity
Inhibition of CDK Activity
The Cell Cycle Control System
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and function at the cell...