2-7 June 2019
Simon Fraser University
America/Vancouver timezone
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Molecular machinery: quantifying the energetic cost of controlling nanoscale biological systems

5 Jun 2019, 13:45
15m
SSB 7172 (Simon Fraser University)

SSB 7172

Simon Fraser University

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle) Physics in Medicine and Biology / Physique en médecine et en biologie (DPMB-DPMB) W2-3 Molecular Motors (DPMB) | Moteurs moléculaires (DPMB)

Speaker

Steven Large (Simon Fraser University)

Description

At microscopic scales, biological systems must maintain a high degree of organization in order to properly function. Ultimately, this organization is achieved by the concerted efforts of a collection of nanoscale molecular machines, protein complexes that perform specific energy-transduction functions within the cell. Quantifying the flows of energy, information, and material through such systems is a central challenge in understanding their dynamics and in vivo operation. What fundamental physical limits are placed on these nonequilibrium systems? What design principles produce efficient machines? I will discuss our recent efforts, using tools from nonequilibrium thermodynamics, to quantify the energetic costs of driving strongly fluctuating systems. In particular, when the controller itself is stochastic (as is the case in molecular machines), dissipation is minimized at a finite speed, implying a thermodynamic benefit to rapid operation.

Primary author

Steven Large (Simon Fraser University)

Co-authors

David Sivak (Simon Fraser University) Raphael Chetrite (Universite de Nice Sophia-Antipolis, Nice, France)

Presentation Materials