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Entropy 2010, 12(6), 1632-1652; doi:10.3390/e12061632

General Framework of Pressure Effects on Structures Formed by Entropically Driven Self-Assembly

Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
Received: 1 March 2010 / Revised: 30 May 2010 / Accepted: 18 June 2010 / Published: 23 June 2010
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Abstract

We review a general framework of pressure effects on the structures formed by entropically driven self-assembly (for example, denaturation of proteins from their native structure and dissociation of ordered structure of the amyloid fibril occur at high pressures). In the framework, the translational entropy of water is an essential factor. Our findings are as follows: at low pressures, the structures almost minimizing the excluded volume (EV) generated for water molecules are stable. On the other hand, at high pressures, the structures possessing the largest possible water-accessible surface area together with sufficiently small EV become more stable. These characteristics are consistent with experimental observations.
Keywords: water; translational entropy; pressure denaturation of proteins; dissociation of protein complexes caused at high pressures; pressure-induced helix-coil transition of alanine-based peptides water; translational entropy; pressure denaturation of proteins; dissociation of protein complexes caused at high pressures; pressure-induced helix-coil transition of alanine-based peptides
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Yoshidome, T. General Framework of Pressure Effects on Structures Formed by Entropically Driven Self-Assembly. Entropy 2010, 12, 1632-1652.

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