title: Synthesis of hydrogen-bond surrogate α-helices as inhibitors of protein-protein interactions.
abstract: The α-helix is a prevalent secondary structure in proteins and is critical in mediating protein-protein interactions (PPIs). Peptide mimetics that adopt stable helices have become powerful tools for the modulation of PPIs in vitro and in vivo. Hydrogen-bond surrogate (HBS) α-helices utilize a covalent bond in place of an N-terminal i to i+4 hydrogen bond and have been used to target and disrupt PPIs that become dysregulated in disease states. These compounds have improved conformational stability and cellular uptake as compared to their linear peptide counterparts. The protocol presented here describes current methodology for the synthesis of HBS α-helical mimetics. The solid-phase synthesis of HBS helices involves solid-phase peptide synthesis with three key steps involving incorporation of N-allyl functionality within the backbone of the peptide, coupling of a secondary amine, and a ring-closing metathesis step.
authors.affiliation: Department of Chemistry, New York University, New York, New York.
authors.forename: Stephen E
authors.initials: SE
authors.lastname: Miller
authors.affiliation: Department of Chemistry, New York University, New York, New York.
authors.forename: Paul F
authors.initials: PF
authors.lastname: Thomson
authors.affiliation: Department of Chemistry, New York University, New York, New York.
authors.forename: Paramjit S
authors.initials: PS
authors.lastname: Arora
mesh_terms: D000596:Amino Acids / Q000737:chemistry; D006860:Hydrogen Bonding; D007202:Indicators and Reagents; D010455:Peptides / Q000138:chemical synthesis / Q000737:chemistry; D017433:Protein Structure, Secondary; D011506:Proteins / Q000737:chemistry* / Q000187:drug effects*
chemical_list: D000596:Amino Acids; D007202:Indicators and Reagents; D010455:Peptides; D011506:Proteins
keywords: hydrogen-bond surrogate; protein-protein interactions; α-helix mimetics