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Improvement of Structure-Based Potentials for Protein Folding by Native and Nonnative Hydrogen Bonds

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Enciso, Marta and Rey, Antonio (2011) Improvement of Structure-Based Potentials for Protein Folding by Native and Nonnative Hydrogen Bonds. Biophysical Journal, 101 (6). pp. 1474-1482. ISSN 0006-3495

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Official URL: http://www.cell.com/biophysj/fulltext/S0006-3495(11)00963-5



Abstract

Pure Go models (where every native interaction equally stabilizes the folded state) have widely proved their convenience in the computational investigation of protein folding. However, a chemistry-based description of the real interactions also provides a desirable tune in the analysis of the folding process, and thus some hybrid Go potentials that combine both aspects have been proposed. Among all the noncovalent interactions that contribute to protein folding, hydrogen bonds are the only ones with a partial covalent character. This feature makes them directional and, thus, more difficult to model as part of the coarse-grained descriptions that are typically employed in Go models. Thanks to a simplified but rigorous representation of backbone hydrogen bonds that we have recently proposed, we present in this article a combined potential (Go + backbone hydrogen bond) to study the thermodynamics of protein folding in the frame of very simple simulation models. We show that the explicit inclusion of hydrogen bonds leads to a systematic improvement in the description of protein folding. We discuss a representative set of examples (from two-state folders to downhill proteins, with different types of native structures) that reveal a relevant agreement with experimental data.


Item Type:Article
Uncontrolled Keywords:Hydrogen BondingModels, MolecularProtein FoldingProtein Structure, SecondaryProteinsThermodynamics
Subjects:Sciences > Chemistry > Chemistry, Physical and theoretical
ID Code:43825
Deposited On:13 Jul 2017 09:58
Last Modified:21 Jul 2017 10:54

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