The quasi-Gaussian entropy (QGE) theory was used to formulate a statistical mechanical model describing the thermodynamics of the folding/unfolding process of single-domain proteins. The model was parametrized using experimental data obtained from differential scanning calorimetry (DSC) of a set of proteins. The results showed that the model is able to reproduce the experimental behavior in the usual temperature range, for all the analyzed proteins. Furthermore, a remarkable similarity of some parameters of the model, when normalized per residue and corresponding to well-defined physical properties, was found. Interestingly, at low temperature, the model provides cold denaturation features for all the proteins. Finally, a general description of the folding/unfolding process and stability, based on the physical view provided by the model, is discussed.

Roccatano, D., Di Nola, A., Amadei, A. (2004). A theoretical model for the folding/unfolding thermodynamics of single-domain proteins, based on the quasi-Gaussian entropy theory. JOURNAL OF PHYSICAL CHEMISTRY. B, MATERIALS, SURFACES, INTERFACES, & BIOPHYSICAL, 108(18), 5756-5762 [10.1021/jp037591a].

A theoretical model for the folding/unfolding thermodynamics of single-domain proteins, based on the quasi-Gaussian entropy theory

AMADEI, ANDREA
2004-01-01

Abstract

The quasi-Gaussian entropy (QGE) theory was used to formulate a statistical mechanical model describing the thermodynamics of the folding/unfolding process of single-domain proteins. The model was parametrized using experimental data obtained from differential scanning calorimetry (DSC) of a set of proteins. The results showed that the model is able to reproduce the experimental behavior in the usual temperature range, for all the analyzed proteins. Furthermore, a remarkable similarity of some parameters of the model, when normalized per residue and corresponding to well-defined physical properties, was found. Interestingly, at low temperature, the model provides cold denaturation features for all the proteins. Finally, a general description of the folding/unfolding process and stability, based on the physical view provided by the model, is discussed.
2004
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore CHIM/02 - CHIMICA FISICA
English
Calorimetry; Entropy; Interfacial energy; Isotherms; Isotopes; Mathematical models; Organic minerals; Statistical mechanics; Thermodynamics; Enthalphy fluctuation; Organic molecules; Structural biology; Thermodynamics of folding; Proteins
Roccatano, D., Di Nola, A., Amadei, A. (2004). A theoretical model for the folding/unfolding thermodynamics of single-domain proteins, based on the quasi-Gaussian entropy theory. JOURNAL OF PHYSICAL CHEMISTRY. B, MATERIALS, SURFACES, INTERFACES, & BIOPHYSICAL, 108(18), 5756-5762 [10.1021/jp037591a].
Roccatano, D; Di Nola, A; Amadei, A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/30804
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