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Functional cooperation between the microtubule and actin cytoskeletons.
B L Goode1, D G Drubin, G Barnes
1Molecular and Cell Biology Department, University of California Berkeley, Oxford and Hearst, CA 94720-3202, USA. goode@uclink4. berkeley.edu
Current Opinion in Cell Biology
|February 19, 2000
Summary
Microtubules and actin filaments work together in cells for transport and positioning. Researchers are identifying key proteins that link these cytoskeletal networks for cellular functions.
Area of Science:
- Cell Biology
- Cytoskeletal Dynamics
- Molecular Motors
Background:
- Microtubules (MTs) and actin filaments are essential cytoskeletal networks in diverse cell types.
- These networks cooperate in crucial cellular processes like transport, migration, and cell division.
Purpose of the Study:
- To review the mechanisms of microtubule and actin filament cooperation in cellular functions.
- To highlight the identified cellular factors that bridge these two cytoskeletal systems.
Main Methods:
- Literature review of studies on cytoskeletal cooperation and associated bridging factors.
- Categorization of mechanisms into coordinated transport and MT end targeting/capture.
Main Results:
- Two primary mechanisms of cooperation identified: coordinated transport and MT end targeting at actin sites.
- Numerous bridging factors have been identified, including hetero-motor complexes, myosin-CLIP170, FH proteins, dynein/dynactin, Kar9p, coronin, Kelch proteins, and ERM proteins.
Conclusions:
- The coordinated action of microtubules and actin filaments, mediated by specific bridging proteins, is fundamental for diverse cellular processes.
- Continued identification of these bridging factors deepens our understanding of cytoskeletal regulation and cellular mechanics.