Inferring Subsystem Efficiencies in Bipartite Molecular Machines

Abstract

Molecular machines composed of coupled subsystems transduce free energy between different external reservoirs, in the process internally transducing energy and information. While subsystem efficiencies of these molecular machines have been measured in isolation, less is known about how they behave in their natural setting when coupled together and acting in concert. Here we derive upper and lower bounds on the subsystem efficiencies of a bipartite molecular machine. We demonstrate their utility by estimating the efficiencies of the ${\mathrm{F}}_{\mathrm{o}}$ and ${\mathrm{F}}_1$ subunits of ATP synthase and that of kinesin pulling a diffusive cargo.

arXiv comment6 pages, 3 figures

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• Jensen bound for the entropy production rate in stochastic thermodynamics
• Dissipation at limited resolutions: Power law and detection of hidden dissipative scales
• Waiting time distributions in hybrid models of motor-bead assays: A concept and tool for inference
• Power-Efficiency Constraint for Chemical Motors
• Active energy harvesting and work transduction by hair-cell bundles in bullfrog's inner ear
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• Synchronization of thermodynamically consistent stochastic phase oscillators