Hairpin Folding Behavior of Mixed α/β-Peptides in Aqueous Solution
作者:George A. Lengyel、Rebecca C. Frank、W. Seth Horne
DOI:10.1021/ja2002346
日期:2011.3.30
The invention of new strategies for the design of protein-mimetic oligomers that manifest the folding encoded in natural amino acid sequences is a significant challenge. In contrast to the a-helix, mimicry of protein beta-sheets is less understood. We report here the aqueous folding behavior of a prototype alpha-peptide hairpin model sequence varied at cross-strand positions by incorporation of 16 different beta-amino acid monomers. Our results provide a folding propensity scale for beta-residues in a protein beta-sheet context as well as high-resolution structures of several mixed-backbone alpha/beta-peptide hairpins in water.