Induction of Unexpected Left-Handed Helicity by an N-Terminal L-Amino Acid in an Otherwise Achiral Peptide Chain
作者:Robert A. Brown、Tommaso Marcelli、Matteo De Poli、Jordi Solà、Jonathan Clayden
DOI:10.1002/anie.201107583
日期:2012.2.6
Peptide helices containing L‐amino acids are typically right‐handed. Exceptions are peptide helices containing the achiral amino acids 2‐aminoisobutyric acid and glycine with a single chiral amino acid at the N terminus. These helices are left‐handed when the N‐terminal residue is a common tertiary proteinogenic amino acid, such as L‐valine (see picture, left), but right‐handed when the N‐terminal