A comparison of the different helices adopted by α- and β-peptides suggests different reasons for their stability

TitleA comparison of the different helices adopted by α- and β-peptides suggests different reasons for their stability
Publication TypeJournal Article
Year of Publication2010
AuthorsAllison, JR, Müller M, van Gunsteren WF
Volume19
Pagination2186-2195
Keywordshelix, molecular dynamics, peptide stability, α-peptide, β-peptide
Abstract

The right-handed α-helix is the dominant helical fold of α-peptides, whereas the left-handed 314-helix is the dominant helical fold of β-peptides. Using molecular dynamics simulations, the properties of α-helical α-peptides and 314-helical β-peptides with different C-terminal protonation states and in the solvents water and methanol are compared. The observed energetic and entropic differences can be traced to differences in the polarity of the solvent-accessible surface area and, in particular, the solute dipole moments, suggesting different reasons for their stability.

URLhttp://dx.doi.org/10.1002/pro.504

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Müller, MM, Allison JR, Hongdilokkul N, Gaillon L, Kast P, van Gunsteren WF, Marlière P, Hilvert D. 2013. Directed Evolution of a Model Primordial Enzyme Provides Insights into the Development of the Genetic Code. PLoS Genet. 9: e1003187
Kleinjung, J, Scott WRP, Allison J R, van Gunsteren WF, Fraternali F. 2012. Implicit solvation parameters derived from explicit water forces in large-scale Molecular Dynamics simulations. J. Chem. Theory Comput.. :
Allison, JR, Riniker S, van Gunsteren WF. 2012. Coarse-grained models for the solvents dimethyl sulfoxide, chloroform, and methanol. The Journal of Chemical Physics. 136: 054505-11
Allison, J R, Hertig S, Missimer JH, Smith LJ, Steinmetz MO, Dolenc J. 2012. Probing the structure and dynamics of proteins by combining molecular dynamics simulations and experimental NMR data. J. Chem. Theory Comput.. :