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Updated: Jul 12, 2026
10:52
Reconstitution of Basic Mitotic Spindles in Spherical Emulsion Droplets
Published on: August 13, 2016
A protein interaction map of the mitotic spindle
Jonathan Wong1, Yuko Nakajima, Stefan Westermann
1Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA.
Molecular Biology of the Cell
|July 20, 2007
Summary
This study maps protein interactions within the yeast mitotic spindle, revealing extensive connections and novel regulatory insights. It enhances understanding of chromosome segregation and cellular processes.
Area of Science:
- Cell Biology
- Molecular Biology
- Genetics
Background:
- The mitotic spindle is crucial for accurate chromosome segregation in eukaryotic cell division.
- Understanding its molecular composition and regulation is key to cell cycle control.
Purpose of the Study:
- To comprehensively map protein-protein interactions within the mitotic spindle.
- To identify novel components and regulatory mechanisms of spindle function.
Main Methods:
- System-wide yeast two-hybrid (Y2H) screening was employed.
- 94 spindle-associated proteins in Saccharomyces cerevisiae were tested for interactions.
- Interactions were validated across multiple screens.
Main Results:
- 604 predominantly novel protein interactions were identified involving 303 distinct proteins.
- Extensive interactions reflect the spindle's intricate organization.
- Novel links between kinetochore complexes, chromatin modifiers, and spindle protein She1p were discovered.
Conclusions:
- The findings reveal a highly integrated network of spindle proteins.
- New insights into phospho-regulation and connections with other cellular activities were gained.
- This interactome provides a foundation for further mitotic spindle research.
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