Download MendeleyGuanidinium-Stapled Helical Peptides for Targeting Protein-Protein Interactions.
Perdriau, C., Luton, A., Zimmeter, K., Neuville, M., Saragaglia, C., Peluso-Iltis, C., Osz, J., Kauffmann, B., Collie, G.W., Rochel, N., Guichard, G., Pasco, M.(2025) Angew Chem Int Ed Engl 64: e202416348-e202416348
- PubMed: 39714600
- DOI: https://doi.org/10.1002/anie.202416348
- Primary Citation of Related Structures:
9GF9, 9GFC, 9GFE, 9GFI - PubMed Abstract:
Peptide stapling has emerged as a versatile approach in drug discovery to reinforce secondary structure elements especially α-helices and improve properties of linear bioactive peptides. Inspired by the prevalence of arginine in protein-protein and protein-DNA interfaces, we investigated guanidinium-stapling as a means to constrain helical peptides. Guanidinium stapling was readily achieved on solid support, utilizing two orthogonally protected lysine or unatural α-amino acid residues with an amino function. This method allows for easy modulation of the nature and size of the staple as well as helix propensity. Evaluating a set of guanidinium-stapled peptides for their interaction with different protein targets identified several binders with increased target affinity. X-ray structure determination of four complexes revealed that all stapled peptides adopt a helical conformation upon protein binding. Notably, the disubstituted guanidinium generally exhibits a distinct cis/trans conformation and, in one instance, retains a conserved hydrogen bond with the protein surface. By identifying, for the first time, the guanidinium moiety as an effective helical peptide stapling group, this research significantly expands the repertoire of α-helix stapling techniques for the creation of useful protein mimics.
Organizational Affiliation:
Univ. Bordeaux, CNRS, Bordeaux INP, CBMN, UMR5248, IECB, 2 rue Robert Escarpit, F-33600, Pessac, France.
