Hydrogen bond surrogate stabilized water soluble 310-helix from a disordered pentapeptide containing coded α-amino acids

Abstract

Replacing a hypothetical i + 3 → i peptide H-bond in a disordered pentapeptide, that lacks any helicogenic Cα-tetrasubstituted residues, with a propyl linker and carbamylating the N-terminal nitrogen constrains it in the elusive 310-helical structure with high helicity and stability under varying conditions of temperature and pH, confirmed by NMR and CD analyses.