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Titolo:
Physical aspects of the weakly hydrated protein surface
Autore:
Careri, G; Peyrard, M;
Indirizzi:
Ecole Normale Super Lyon, Phys Lab, F-69364 Lyon, France Ecole Normale Super Lyon Lyon France F-69364 s Lab, F-69364 Lyon, France Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy Univ Roma La Sapienza Rome Italy I-00185 imento Fis, I-00185 Rome, Italy INFM, I-00185 Rome, Italy INFM Rome Italy I-00185INFM, I-00185 Rome, Italy
Titolo Testata:
CELLULAR AND MOLECULAR BIOLOGY
fascicolo: 5, volume: 47, anno: 2001,
pagine: 745 - 756
SICI:
0145-5680(200107)47:5<745:PAOTWH>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
PROTON GLASS; EXCESS PROTON; WATER; DYNAMICS; RELAXATION; DIFFUSION; POWDERS;
Keywords:
hydration water; dielectric measurements; proton conductivity; glassy protons; percolation;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Peyrard, M Ecole Normale Super Lyon, Phys Lab, 46 Allee Italie, F-69364 Lyon, France Ecole Normale Super Lyon 46 Allee Italie Lyon France F-69364 e
Citazione:
G. Careri e M. Peyrard, "Physical aspects of the weakly hydrated protein surface", CELL MOL B, 47(5), 2001, pp. 745-756

Abstract

We review the physical properties of water on the surface of weakly hydrated proteins and present some theoretical models used to understand them. The first part concerns mainly structural properties and introduces a model for two-dimensional Clusters of water molecules. The second part is devoted to dynamical properties of the hydrated protein surface. Dielectric measurements which provide an evidence for proton conductivity due to the percolation of die network of surface water molecules and for the glass dynamics ofmigrating protons when temperature is lowered are reviewed. These results can be associated with the concept of frustration and analyzed with two models, an Ising model to describe the proton jumps and the model of two-dimensional surface water which exhibits a glassy dynamiques of the water molecules. Biological implications of these properties of hydration water are briefly discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 10:16:52