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Dynamic microtubules in Dictyostelium
Michael P Koonce1, Alexey Khodjakov
1Division of Molecular Medicine, Wadsworth Center, Empire State of Plaza, P.O. Box 509, Albany, NY 12201-0509, USA. koonce@wadsworth.org
Journal of Muscle Research and Cell Motility
|September 4, 2003
Summary
This review explores microtubule dynamics in Dictyostelium, detailing conventional assembly/disassembly and novel forces. These forces influence cell structure and intracellular transport, revealing new aspects of cytoskeletal motility.
Area of Science:
- Cell Biology
- Cytoskeletal Dynamics
Background:
- Microtubules are key cytoskeletal polymers involved in cell structure and transport.
- Conventional microtubule dynamics focus on polymerization and depolymerization.
- Live imaging in Dictyostelium reveals additional dynamic behaviors of assembled microtubules.
Purpose of the Study:
- To review conventional microtubule dynamics in Dictyostelium.
- To describe two additional motility components acting on individual microtubules.
- To propose the functional significance of these forces.
Main Methods:
- Live cell imaging of microtubules in Dictyostelium.
- Analysis of microtubule bending and tension generation.
- Literature review of existing knowledge on microtubule dynamics.
Main Results:
- Identified conventional microtubule assembly/disassembly processes.
- Documented two distinct forces causing microtubule bending and cortical tension.
- Observed these forces acting on individual assembled microtubules.
Conclusions:
- Microtubule dynamics extend beyond simple assembly/disassembly.
- Two novel forces contribute to microtubule motility and cell mechanics.
- These forces are crucial for microtubule organization and intracellular transport in Dictyostelium.