Protein heat capacity: an anomaly that maybe never was

Cooper, A. (2010) Protein heat capacity: an anomaly that maybe never was. Journal of Physical Chemistry Letters, 1(22), pp. 3298-3304. (doi:10.1021/jz1012142)

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Abstract

Protein unfolding in aqueous solution is usually accompanied by an increase in heat capacity (Delta C-p), and this has long been regarded as somewhat anomalous. However, neither the absolute heat capacities (C-p) of folded globular proteins nor the heat capacity increments upon unfolding (Delta C-p) are unusual in comparison to values observed for order-disorder (melting) transitions in other organic substances. The consequences for protein stability, including cold denaturation, enthalpy-entropy compensation, and the temperature of maximum stability, may seem counterintuitive but should not be unexpected. Nevertheless, while perhaps not so anomalous as once thought, quantitative interpretation of protein heat capacity and related effects remains a theoretical challenge.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Cooper, Professor Alan
Authors: Cooper, A.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Journal of Physical Chemistry Letters
ISSN:1948-7185
Published Online:04 November 2010

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