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Updated: Jun 16, 2026
12:20
Preparation of Segmented Microtubules to Study Motions Driven by the Disassembling Microtubule Ends
Published on: March 15, 2014
Nonprocessive motor dynamics at the microtubule membrane tube interface.
Paige M Shaklee1, Line Bourel-Bonnet, Marileen Dogterom
1Physics of Life Processes, Leiden Institute of Physics, Leiden University, Leiden, The Netherlands. p.shaklee@amolf.nl
Biophysical Journal
|January 21, 2010
Summary
Motor proteins coordinate collective dynamics for membrane tube formation. Processive motors move directionally, while nonprocessive motors exhibit diffusive behavior, enabling bidirectional membrane dynamics.
Area of Science:
- Cellular biology
- Biophysics
- Molecular motors
Background:
- Cellular processes depend on motor proteins.
- Single motor protein properties are well-understood.
- In vivo, motor protein coordination is crucial but less studied.
Purpose of the Study:
- Investigate collective motor protein dynamics.
- Examine motor-assisted membrane tube formation.
- Differentiate behaviors of processive and nonprocessive motors.
Main Methods:
- Attaching motor proteins to giant vesicles.
- Utilizing image correlation spectroscopy.
- Employing fluorescence recovery after photobleaching.
Main Results:
- Processive motors move directionally along microtubules at speeds up to 500 nm/s.
- Nonprocessive motors display diffusive motion on microtubules.
- Nonprocessive motors accumulate at the microtubule-membrane interface.
Conclusions:
- Processive motors drive directed membrane tube growth.
- Nonprocessive motors' dynamic binding facilitates bidirectional membrane dynamics.
- Collective motor behavior is essential for cellular functions.
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