Pressure Dependence of the Dynamic Crossover Temperatures in Protein and its Hydration Water

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dc.creatorChu, Xiang-qiang
dc.creatorFaraone, Antonio
dc.creatorKim, Chansoo
dc.creatorFratini, Emiliano
dc.creatorBaglioni, Piero
dc.creatorLeao, Juscelino B.
dc.creatorChen, Sow-Hsin
dc.date2008-10-07
dc.date.accessioned2026-07-07T10:08:09Z
dc.date.available2026-07-07T10:08:09Z
dc.descriptionRecently we have shown experimental evidence for a fragile-to-strong dynamic crossover (FSC) phenomenon in hydration water around a globular protein (lysozyme) at ambient pressure. In this letter we show that when applying pressure to the protein-water system, the FSC crossover temperatures in hydration water of lysozyme tracks the similar Widom line emanating from the existence of a liquid-liquid critical point in a 1-D confined water (in MCM-41-S). The mean squared displacements (MSD) of hydrogen atoms in lysozyme and in its hydration water show a sudden change of slopes at the same characteristic temperature, which decreases with an increasing pressure. These results taken together give support of the idea that the dynamic crossover (or so-called glass transition) of the protein is a function of both temperature and pressure, following the FSC of its hydration water.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0810.1228
dc.identifierhttp://arxiv.org/abs/0810.1228
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/170893
dc.subjectBiological Physics
dc.titlePressure Dependence of the Dynamic Crossover Temperatures in Protein and its Hydration Water
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