PPII Helical Peptidomimetics Templated by Cation–π Interactions

Timothy W. Craven, Richard Bonneau, Kent Kirshenbaum

Research output: Contribution to journalArticlepeer-review


Poly-proline type II (PPII) helical PXXP motifs are the recognition elements for a variety of protein–protein interactions that are critical for cellular signaling. Despite development of protocols for locking peptides into α-helical and β-strand conformations, there remains a lack of analogous methods for generating mimics of PPII helical structures. We describe herein a strategy to enforce PPII helical secondary structure in the 19-residue TrpPlexus miniature protein. Through sequence variation, we showed that a network of cation–π interactions could drive the formation of PPII helical conformations for both peptide and N-substituted glycine peptoid residues. The achievement of chemically diverse PPII helical scaffolds provides a new route towards discovering peptidomimetic inhibitors of protein–protein interactions mediated by PXXP motifs.

Original languageEnglish (US)
Pages (from-to)1824-1828
Number of pages5
StatePublished - Oct 4 2016


  • PPII helices
  • PXXP motif mimetics
  • foldamers
  • miniature protein design
  • peptoids

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Medicine
  • Molecular Biology
  • Organic Chemistry


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