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Studying the Protein Quality Control System of D. discoideum Using Temperature-controlled Live Cell Imaging
Published on: December 2, 2016
Molecular analysis of racE function in Dictyostelium
D A Larochelle1, N Gerald, A De Lozanne
1Department of Biology, Clark University, Worcester, Massachusetts 01610, USA. dlaroche@black.clarku.edu
Microscopy Research and Technique
|May 18, 2000
Summary
The novel gene racE is crucial for cytokinesis in Dictyostelium, regulating cortical tension and actin organization. Its absence disrupts cell division by impairing proper cortical tension.
Area of Science:
- Cell Biology
- Cytoskeletal Dynamics
- Molecular Genetics
Background:
- Dictyostelium discoideum is a model organism for studying cytoskeleton and cell motility.
- Cytokinesis, the process of cell division, is essential for organism development and relies on precise cytoskeletal regulation.
Purpose of the Study:
- To isolate and characterize a novel gene, racE, involved in cytokinesis.
- To elucidate the function of the racE gene product in regulating cell division.
Main Methods:
- Gene isolation via a targeted screen for cytokinesis-essential genes.
- Green fluorescent protein (GFP) fusion protein expression for localization studies.
- Mutational analysis to assess gene function.
- Cortical tension measurements and live-cell imaging.
Main Results:
- The racE gene was identified as essential for cytokinesis.
- RacE localizes to the plasma membrane throughout the cell cycle.
- RacE plays a role in regulating cortical tension and actin organization at the cell cortex.
- Impaired cortical tension due to racE dysfunction hinders normal cytokinesis.
Conclusions:
- The racE gene product is vital for maintaining cortical tension and proper actin organization during cytokinesis.
- Dysregulation of cortical tension by racE is a key factor in failed cell division.
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