Abstract
Although membrane proteins constitute an important class of biomolecules involved in key cellular processes, study of the thermodynamic and kinetic stability of their structures is far behind that of soluble proteins. It is known that many membrane proteins become unstable when removed by detergent extraction from the lipid environment. In addition, most of them undergo irreversible denaturation, even under mild experimental conditions. This process was found to be associated with partial unfolding of the polypeptide chain exposing hydrophobic regions to water, and it was proposed that the formation of kinetically trapped conformations could be involved. In this review, we will describe some of the efforts toward understanding the irreversible inactivation of membrane proteins. Furthermore, its modulation by phospholipids, ligands, and temperature will be herein discussed.
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Acknowledgements
The author thanks Dr. Rodolfo M González-Lebrero for the helpful discussions. This work was supported by grants from Agencia Nacional de Promoción Científica y Tecnológica (PICT2013-1691), CONICET (PIP 2013-00014CO), and Universidad de Buenos Aires (UBACyT 20020130100460BA).
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This article is part of a Special Issue on ‘Latin America’ edited by Pietro Ciancaglini and Rosangela Itri.
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González Flecha, F.L. Kinetic stability of membrane proteins. Biophys Rev 9, 563–572 (2017). https://doi.org/10.1007/s12551-017-0324-0
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DOI: https://doi.org/10.1007/s12551-017-0324-0