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Published on: October 15, 2019
Miniature work-to-work converter engine powered by motor protein
Suraj Deshmukh1,2, Sougata Guha3, Basudha Roy1
1Savitribai Phule Pune University, Department of Physics, Pune 411007, India.
Physical Review. E
|July 24, 2026
Summary
This study presents an information-based microengine using a motor protein and optical trap. The novel design effectively converts motor protein movement into work, significantly outperforming existing microscale engines.
Area of Science:
- Physics
- Biophysics
- Nanotechnology
Background:
- Designing microscale engines that overcome thermal fluctuations is a significant challenge.
- Conventional microengines struggle with efficiency and fidelity due to inherent stochasticity.
Purpose of the Study:
- To design and theoretically frame a novel information-based engine.
- To demonstrate a work-to-work converter harnessing motor protein dynamics.
- To analyze engine performance based on motor protein (un)binding characteristics.
Main Methods:
- Utilizing a submicron-sized bead and motor protein microtubule (MT) complex in an optical trap.
- Implementing a feedback protocol adjusting optical trap stiffness based on motor protein state.
- Employing stochastic simulations to validate theoretical predictions.
Main Results:
- Developed an analytical framework for work distribution, average work, and power output.
- Demonstrated successful conversion of motor protein movement into usable work.
- Achieved average work output per cycle significantly exceeding thermal fluctuations.
Conclusions:
- The designed information-based engine offers a new paradigm for microscale energy conversion.
- Engine performance is intrinsically linked to the stochastic nature of motor protein binding.
- This work provides a validated theoretical and experimental basis for advanced microengine design.
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