Non-classical Helices with<i>cis</i>Carbon-Carbon Double Bonds in the Backbone: Structural Features of α,γ-Hybrid Peptide Foldamers
作者:Mothukuri Ganesh Kumar、Varsha J. Thombare、Mona M. Katariya、Kuruva Veeresh、K. Muruga Poopathi Raja、Hosahudya N. Gopi
DOI:10.1002/anie.201602861
日期:2016.6.27
The impact of geometrically constrained cis α,β‐unsaturated γ‐amino acids on the folding of α,γ‐hybridpeptides was investigated. Structure analysis in single crystals and in solution revealed that the cis carbon–carbon double bonds can be accommodated into the 12‐helix without deviation from the overall helical conformation. The helical structures are stabilized by 4→1 hydrogen bonding in a similar