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Cdc20 associates with the kinase aurora2/Aik
D C Farruggio1, F M Townsley, J V Ruderman
1Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, MA 02115, USA.
Summary
Cdc20, a key cell cycle regulator, associates with the aurora2 kinase. This interaction suggests aurora2 may regulate Cdc20
Area of Science:
- Cell Biology
- Molecular Biology
- Genetics
Background:
- Cdc20/fizzy proteins activate the anaphase-promoting complex/cyclosome (APC/C).
- APC/C drives proteolysis of cell cycle proteins, enabling mitosis exit and chromosome segregation.
- hCdc20/p55CDC is known to bind kinases, but specific interactions are not fully elucidated.
Purpose of the Study:
- To investigate the kinase activity associated with Cdc20.
- To identify specific kinases interacting with human Cdc20 (hCdc20).
- To explore the functional implications of Cdc20-kinase interactions in cell cycle regulation.
Main Methods:
- Assay of myelin basic protein kinase activity associated with Cdc20.
- Identification of interacting kinases using HeLa cell extracts.
- Analysis of protein localization and cell cycle phase-specific activity.
Main Results:
- Cdc20-associated kinase activity peaks in M phase (embryonic) or G2 phase (somatic) cells.
- Human Cdc20 (hCdc20) was found to associate with the aurora2/Aik kinase.
- Aurora2/Aik is a mitotic spindle-localized kinase involved in chromosome segregation and genomic stability.
Conclusions:
- Cdc20 interacts with the aurora2 kinase during specific cell cycle phases.
- This association suggests aurora2 kinase plays a role in regulating Cdc20 function.
- The findings provide insight into the molecular mechanisms controlling chromosome segregation and mitotic progression.