| Literature DB >> 20491510 |
Li Guo1, Aaron M Almeida, Weicheng Zhang, Andrew G Reidenbach, Soo Hyuk Choi, Ilia A Guzei, Samuel H Gellman.
Abstract
We report the first high-resolution structural data for the beta/gamma-peptide 13-helix (i,i+3 C=O...H-N H-bonds), a secondary structure that is formed by oligomers with a 1:1 alternation of beta- and gamma-amino acid residues. Our characterization includes both crystallographic and 2D NMR data. Previous studies suggested that beta/gamma-peptides constructed from conformationally flexible residues adopt a different helical secondary structure in solution. Our design features preorganized beta- and gamma-residues, which strongly promote 13-helical folding by the 1:1 beta/gamma backbone.Entities:
Mesh:
Substances:
Year: 2010 PMID: 20491510 PMCID: PMC2904518 DOI: 10.1021/ja103233a
Source DB: PubMed Journal: J Am Chem Soc ISSN: 0002-7863 Impact factor: 15.419