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Cell cycle: oiling the gears of anaphase
1Department of Pathology, Stanford University School of Medicine, Palo Alto, California 94305, USA.
Current Biology : CB
|September 19, 1998
Summary
The anaphase-promoting complex (APC) directs cell division by degrading key proteins. WD40 proteins are essential for APC function and ensure accurate chromosome segregation during mitosis.
Area of Science:
- Cell Biology
- Molecular Biology
- Genetics
Background:
- The anaphase-promoting complex (APC/cyclosome) is a crucial E3 ubiquitin ligase complex.
- APC/cyclosome regulates key events in mitosis by targeting specific proteins for degradation.
- Recent research highlights the involvement of WD40 domain proteins in APC/cyclosome activity.
Purpose of the Study:
- To elucidate the role of WD40 domain proteins in APC/cyclosome function.
- To investigate the contribution of WD40 proteins to the cell cycle checkpoint control.
- To understand how these proteins ensure accurate chromosome segregation.
Main Methods:
- Biochemical assays to study protein interactions.
- Genetic manipulation to assess protein function in mitosis.
- Microscopy to observe chromosome behavior during cell division.
Main Results:
- APC/cyclosome activity is dependent on specific WD40 domain proteins.
- One such WD40 protein is integral to the checkpoint that monitors chromosome segregation.
- This protein complex is vital for preventing errors in cell division.
Conclusions:
- WD40 proteins are essential components of the anaphase-promoting complex.
- These proteins play a critical role in the spindle assembly checkpoint.
- Ensuring accurate chromosome segregation is a key function mediated by APC/WD40 protein interactions.