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Updated: Jun 25, 2026
08:31
Measurement of Microtubule Dynamics by Spinning Disk Microscopy in Monopolar Mitotic Spindles
Published on: November 15, 2019
Temperature-dependent elasticity of microtubules
1Institut de la Physique de la Matière Complexe, EPFL, CH-1015 Lausanne, Switzerland.
Langmuir : the ACS Journal of Surfaces and Colloids
|May 23, 2008
Summary
Microtubule length changes are vital for cell function and are temperature-sensitive. This study reveals that the lateral interactions between tubulin subunits within microtubules are highly dependent on temperature, impacting their mechanical properties.
Area of Science:
- Biophysics
- Cell Biology
- Polymer Science
Background:
- Microtubules are essential cytoskeletal polymers involved in cell division and transport.
- Their dynamic length modification (polymerization/depolymerization) is crucial for biological functions.
- Temperature significantly influences microtubule dynamics in vitro and in vivo.
Purpose of the Study:
- To investigate the temperature dependence of lateral interactions between tubulin subunits in microtubules.
- To correlate the mechanical properties of microtubules with their dynamic behavior.
Main Methods:
- Atomic Force Microscopy (AFM) was used to deform microtubules on prefabricated substrates.
- Microtubules were modeled as anisotropic materials with Young's and shear moduli.
- Radial compression and bending measurements were performed at different temperatures.
Main Results:
- Microtubule elasticity was found to be temperature-dependent.
- Bending measurements indicated that the shear modulus, representing lateral protofilament interaction, changes significantly with temperature.
- These findings align with known temperature-dependent rates of microtubule disassembly.
Conclusions:
- The lateral interaction between tubulin protofilaments is strongly governed by temperature.
- Mechanical properties and dynamic instability of microtubules are intrinsically linked and temperature-sensitive.
- This provides a mechanistic link between microtubule mechanics and their biological regulation.
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