Folding thermodynamics of three beta-sheet peptides: A model study

Details Folding thermodynamics of three beta-sheet peptides: A model study Folding thermodynamics of three beta-sheet peptides: A model study

2003-12-30

arxiv.org/abs/q-bio/0312042v1

Proteins 56 (2004) 110-116

Biology

Quantitative Biology

Biomolecules

17 pages, 7 figures, to appear in Proteins

Scientific paper

We study the folding thermodynamics of a beta-hairpin and two three-stranded beta-sheet peptides using a simplified sequence-based all-atom model, in which folding is driven mainly by backbone hydrogen bonding and effective hydrophobic attraction. The native populations obtained for these three sequences are in good agreement with experimental data. We also show that the apparent native population depends on which observable is studied; the hydrophobicity energy and the number of native hydrogen bonds give different results. The magnitude of this dependence matches well with the results obtained in two different experiments on the beta-hairpin.

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