A highly stable short α-helix constrained by a main-chain hydrogen-bond surrogate

Ross N. Chapman, Gianluca Dimartino, Paramjit S. Arora

Research output: Contribution to journalArticlepeer-review


Herein we describe a strategy for the preparation of artificial α-helices involving replacement of one of the main-chain hydrogen bonds with a covalent linkage. To mimic the C=O⋯H-N hydrogen bond as closely as possible, we envisioned a covalent bond of the type C=X-Y-N, where X and Y are two carbon atoms connected through an olefin metathesis reaction. Our results demonstrate that the replacement of a hydrogen bond between the i and i + 4 residues at the N-terminus of a short peptide with a carbon-carbon bond results in a highly stable constrained α-helix at physiological conditions as indicated by CD and NMR spectroscopies. The advantage of this strategy is that it allows access to short α-helices with strict preservation of molecular recognition surfaces required for biomolecular interactions.

Original languageEnglish (US)
Pages (from-to)12252-12253
Number of pages2
JournalJournal of the American Chemical Society
Issue number39
StatePublished - Oct 6 2004

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry


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