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The dynein microtubule motor
1Department of Biochemistry, University of Connecticut Health Center, 263 Farmington Avenue, Farmington, CT 06032-3305, USA. king@panda.uchc.edu
Biochimica Et Biophysica Acta
|March 21, 2000
Summary
Dyneins are essential microtubule motors driving cellular processes. Their complex structure, including heavy, intermediate, and light chains, allows for motor function, cargo binding, and intricate regulation via phosphorylation and ion binding.
Area of Science:
- Cell Biology
- Molecular Motors
Background:
- Dyneins are large, multi-component microtubule-based molecular motors.
- They are crucial for fundamental cellular processes like vesicular transport, mitosis, and ciliary/flagellar beating.
Purpose of the Study:
- To elucidate the roles of dynein components in cellular functions.
- To understand the regulatory mechanisms governing dynein motor activity.
Main Methods:
- Molecular studies
- Genetic analyses
- Structural investigations
Main Results:
- Dynein heavy chains contain ATPase and microtubule motor domains.
- Intermediate and light chains mediate cargo binding and regulation.
- Regulatory control involves phosphorylation and light chain proteins with redox-sensitive and Ca(2+)-binding properties.
Conclusions:
- Dynein function is modulated by multiple regulatory inputs.
- Recent studies provide insights into dynein component roles and motility mechanisms.