Chemically modified peptide ligands were identified from α-helix peptide phage libraries with different types of staple linkers. The hDM2-protein was used as a representative target of protein-protein interactions to screen ligands for p53 binding sites in hDM2. Two types of staple linkers were used for the chemical modification of the peptide phage display libraries before affinity selection. The identified stapled peptides could bind to hDM2 competitively with the p53 peptide. The stapled peptide phage libraries developed in this study will improve the discovery of protein-protein interaction inhibitors through the synergistic effect of peptide units and staple linkers.
Keywords: Affinity screening; Peptide inhibitor; Phage display; Protein–protein interaction; Stapled peptide.
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