Data di Pubblicazione:
2001
Citazione:
Thermal unfolding of monomeric and dimeric beta-lactoglobulins / D. Fessas, S. Iametti, A. Schiraldi, F. Bonomi. - In: EUROPEAN JOURNAL OF BIOCHEMISTRY. - ISSN 0014-2956. - 268:20(2001), pp. 5439-5448.
Abstract:
The thermal stabilities of dimeric bovine β-lactoglobulin and monomeric equine β-lactoglobulin were investigated at neutral pH by means of differential scanning calorimetry, circular dichroism, tryptophan fluorescence, and by binding of an hydrophobic probe. Differential scanning calorimetry showed the presence of two structural domains with different thermal stabilities in both proteins. Thermodynamic analysis of the calorimetric signal revealed that the two domains unfold independently according to a mechanism where an equilibrium step is followed by an irreversible transition. The spectroscopic data supported this model and allowed recognition of the structural regions corresponding to the more thermally stable domain. The differences in thermal stability between the two proteins can be primarily ascribed to the properties of the less stable domain.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
β-lactoglobulin; DSC; Protein thermal stability; Spectroscopy
Elenco autori:
D. Fessas, S. Iametti, A. Schiraldi, F. Bonomi
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