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Single-Point versus Multi-Point Mechanical Loading in Membrane Deformation: Insights from Molecular Dynamics
Wei Wu1, Xuemei Lu2, Xuewei Dong1
1Center for Soft Condensed Matter Physics and Interdisciplinary Research & School of Physical Science and Technology, Soochow University, Suzhou 215006, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|June 23, 2026
Summary
Multipoint force application drives faster cell membrane deformation than single-point forces, crucial for understanding endocytosis mechanisms. This research clarifies how force distribution impacts cellular processes.
Area of Science:
- Biophysics
- Cell Biology
- Computational Biology
Background:
- Cell membrane deformation is vital for cellular functions like endocytosis.
- The physical principles behind membrane remodeling are not fully understood.
Purpose of the Study:
- To investigate force-driven membrane deformation using simulations.
- To compare the effects of single-point versus multipoint force application on membrane dynamics.
Main Methods:
- Utilized molecular dynamics simulations with an ultracoarse-grained mesoscopic membrane model.
- Analyzed force-driven membrane deformation at scales relevant to endocytosis.
- Compared localized single-point and distributed multipoint force loading modes.
Main Results:
- Multipoint force loading resulted in significantly faster and more sustained membrane deformation compared to single-point loading, even with equal total force.
- The number of force application points had a substantial impact on membrane morphology, vesicle volume, and bending energy.
- The size of the force-loading region had a minimal effect on deformation dynamics.
Conclusions:
- Distributed force application is more effective for driving membrane deformation than localized forces.
- These findings offer a mechanical framework for understanding how proteins mediate membrane remodeling during cellular processes like endocytosis.
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