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The Melting Diagram of Protein Solutions and Its Thermodynamic Interpretation
Here we present a novel method for the characterization of the hydration of protein solutions based on measuring and evaluating two-component wide-line (1)H NMR signals. We also provide a description of key elements of the procedure conceived for the thermodynamic interpretation of such results. The...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6274677/ https://www.ncbi.nlm.nih.gov/pubmed/30424574 http://dx.doi.org/10.3390/ijms19113571 |
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author | Tompa, Kálmán Bokor, Mónika Tompa, Péter |
author_facet | Tompa, Kálmán Bokor, Mónika Tompa, Péter |
author_sort | Tompa, Kálmán |
collection | PubMed |
description | Here we present a novel method for the characterization of the hydration of protein solutions based on measuring and evaluating two-component wide-line (1)H NMR signals. We also provide a description of key elements of the procedure conceived for the thermodynamic interpretation of such results. These interdependent experimental and theoretical treatments provide direct experimental insight into the potential energy surface of proteins. The utility of our approach is demonstrated through the examples of two proteins of distinct structural classes: the globular, structured ubiquitin; and the intrinsically disordered ERD10 (early response to dehydration 10). We provide a detailed analysis and interpretation of data recorded earlier by cooling and slowly warming the protein solutions through thermal equilibrium states. We introduce and use order parameters that can be thus derived to characterize the distribution of potential energy barriers inhibiting the movement of water molecules bound to the surface of the protein. Our results enable a quantitative description of the ratio of ordered and disordered parts of proteins, and of the energy relations of protein–water bonds in aqueous solutions of the proteins. |
format | Online Article Text |
id | pubmed-6274677 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-62746772018-12-15 The Melting Diagram of Protein Solutions and Its Thermodynamic Interpretation Tompa, Kálmán Bokor, Mónika Tompa, Péter Int J Mol Sci Article Here we present a novel method for the characterization of the hydration of protein solutions based on measuring and evaluating two-component wide-line (1)H NMR signals. We also provide a description of key elements of the procedure conceived for the thermodynamic interpretation of such results. These interdependent experimental and theoretical treatments provide direct experimental insight into the potential energy surface of proteins. The utility of our approach is demonstrated through the examples of two proteins of distinct structural classes: the globular, structured ubiquitin; and the intrinsically disordered ERD10 (early response to dehydration 10). We provide a detailed analysis and interpretation of data recorded earlier by cooling and slowly warming the protein solutions through thermal equilibrium states. We introduce and use order parameters that can be thus derived to characterize the distribution of potential energy barriers inhibiting the movement of water molecules bound to the surface of the protein. Our results enable a quantitative description of the ratio of ordered and disordered parts of proteins, and of the energy relations of protein–water bonds in aqueous solutions of the proteins. MDPI 2018-11-12 /pmc/articles/PMC6274677/ /pubmed/30424574 http://dx.doi.org/10.3390/ijms19113571 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Tompa, Kálmán Bokor, Mónika Tompa, Péter The Melting Diagram of Protein Solutions and Its Thermodynamic Interpretation |
title | The Melting Diagram of Protein Solutions and Its Thermodynamic Interpretation |
title_full | The Melting Diagram of Protein Solutions and Its Thermodynamic Interpretation |
title_fullStr | The Melting Diagram of Protein Solutions and Its Thermodynamic Interpretation |
title_full_unstemmed | The Melting Diagram of Protein Solutions and Its Thermodynamic Interpretation |
title_short | The Melting Diagram of Protein Solutions and Its Thermodynamic Interpretation |
title_sort | melting diagram of protein solutions and its thermodynamic interpretation |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6274677/ https://www.ncbi.nlm.nih.gov/pubmed/30424574 http://dx.doi.org/10.3390/ijms19113571 |
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