Estamos realizando la búsqueda. Por favor, espere...
1582
37
170
29108
4409
2600
347
389
Abstract: Statistical thermodynamics of protein solutions is often studied in terms of simple, microscopic models of particles interacting via pairwise potentials. Such modelling can reproduce the short range structure of protein solutions at equilibrium and predict thermodynamics instabilities of these systems. We introduce a square well model of effective protein?protein interaction that embeds the solvent?s action. We modify an existing model [45] by considering a well depth having an explicit dependence on temperature, i.e. an explicit free energy character, thus encompassing the statistically relevant configurations of solvent molecules around proteins. We choose protein solutions exhibiting demixing upon temperature decrease (lysozyme, enthalpy driven) and upon temperature increase (haemoglobin, entropy driven). We obtain satisfactory fits of spinodal curves for both the two proteins without adding any mean field term, thus extending the validity of the original model. Our results underline the solvent role in modulating or stretching the interaction potential.
Autoría: D'Agostino T., Solana J., Emanuele A.,
Fuente: Chemical Physics, 2013, 424, 50-55
Editorial: Elsevier
Fecha de publicación: 16/10/2013
Nº de páginas: 6
Tipo de publicación: Artículo de Revista
DOI: 10.1016/j.chemphys.2013.01.041
ISSN: 0301-0104,1873-4421
Proyecto español: FIS2009-09616
Url de la publicación: http://dx.doi.org/10.1016/j.chemphys.2013.01.041
Leer publicación
D'AGOSTINO, TOMMASO
JOSE RAMON SOLANA QUIROS
EMANUELE, ANTONIO
Volver