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Can free energy be transduced from electric noise?
Summary
Enzymes can harness free energy from environmental electrical noise, not just regular oscillations. This study demonstrates how enzymes can perform work using seemingly random fluctuations, challenging previous assumptions.
Area of Science:
- Biophysics
- Biochemistry
- Physical Chemistry
Background:
- Free energy transduction from oscillating electric fields to enzymes has been demonstrated.
- The potential for enzymes to utilize energy from random environmental fluctuations was previously unexplored.
Purpose of the Study:
- To investigate if enzymes can transduce free energy from randomly pulsed electric fields.
- To resolve the paradox of energy harvesting from environmental noise.
Main Methods:
- Monte Carlo simulations
- Numerical calculations
- Analytical proof using the diagram method
Main Results:
- Equilibrium electrical noise is state-correlated, not completely random.
- Reciprocal interactions between noise and enzyme states prevent energy harvesting from correlated noise.
- Model enzymes can undergo net cyclic flux driven by uncorrelated (autonomous) noise.
Conclusions:
- Enzymes can extract and convert free energy from inherent environmental fluctuations.
- The state-dependent correlation of electrical noise is key to understanding energy transduction.
- This work opens new avenues for understanding biological energy conversion mechanisms.
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