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Updated: Sep 11, 2025
09:00
Cargo Loading onto Kinesin Powered Molecular Shuttles
Published on: November 3, 2010
10.6K
Intracellular cargo transport along multiple filaments with lane switching
Naruemon Rueangkham1, Rhoda J Hawkins2
1King Mongkut's Institute of Technology Ladkrabang, University of Sheffield, Department of Physics and Astronomy, Hicks Building, Hounsfield Road, Sheffield S3 7RH, United Kingdom and Department of Physics, KOSEN-KMITL, Bangkok, Thailand.
Physical Review. E
|August 19, 2025
Summary
Cargo transport using multiple molecular motors on several filaments is faster and more efficient than on a single filament. Motor properties like processivity significantly impact transport speed and distance, affecting delivery times.
Area of Science:
- Cellular biology
- Biophysics
- Computational biology
Background:
- Cellular cargo transport relies on molecular motors moving along cytoskeletal filaments.
- While single-filament transport is well-studied, multi-filament transport with motor detachment and reattachment is poorly understood.
Purpose of the Study:
- Investigate cargo transport properties on multiple filaments compared to single filaments.
- Analyze the impact of molecular motor binding kinetics on transport efficiency.
Main Methods:
- Lattice-based Monte Carlo simulations were employed.
- Developed an analytical expression for cargo velocity on multiple lanes.
Main Results:
- Cargo transport on multiple filaments demonstrated increased velocity and run length.
- Mean first passage time was reduced for multi-filament transport.
- Motor processivity and binding kinetics (on/off rates) directly influenced transport speed and cargo delivery time.
Conclusions:
- Multi-filament transport enhances cargo delivery efficiency compared to single-filament transport.
- Motor intrinsic properties are critical determinants of transport performance.
- The analytical model accurately describes force-velocity relationships in multi-filament transport simulations.
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