| Literature DB >> 16734453 |
John D Fisk1, Margaret A Schmitt, Samuel H Gellman.
Abstract
We report the first thermodynamic analysis of parallel beta-sheet formation in a model system that folds in aqueous solution. NMR chemical shifts were used to determine beta-sheet population, and van't Hoff anaysis provided thermodynamic parameters. Our approach relies upon the d-prolyl-1,1-dimethyl-1,2-diaminoethane unit to promote parallel beta-sheet formation between attached peptide strands. The development of a macrocyclic reference molecule to provide chemical shift data for the fully folded state was crucial to the quantitative anaylsis.Entities:
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Year: 2006 PMID: 16734453 PMCID: PMC2723805 DOI: 10.1021/ja060942p
Source DB: PubMed Journal: J Am Chem Soc ISSN: 0002-7863 Impact factor: 15.419