%0 Journal Article %T PEPscan: A Broad Spectrum Approach for the Characterization of Protein-Binder Interactions? %+ Unité de Technologies Chimiques et Biologiques pour la Santé (UTCBS - UM 4 (UMR 8258 / U1022)) %+ Unité de Biologie Fonctionnelle et Adaptative (BFA (UMR_8251 / U1133)) %A Rebollo, Angelita %A Fliedel, Louise %A Tuffery, Pierre %< avec comité de lecture %@ 2218-273X %J Biomolecules %I MDPI %V 12 %N 2 %P 178 %8 2022 %D 2022 %R 10.3390/biom12020178 %K PEPscan %K protein-protein interaction %K protein-peptide interactions %K protein-polysaccharide interactions %Z Life Sciences [q-bio]/Biochemistry, Molecular BiologyJournal articles %X In a previous study, we have shown that PEPscan can provide a cheap and rapid means to identify candidate interfering peptides (IPs), i.e., peptides able to disrupt a target protein-protein interaction. PEPscan was shown to be effective in identifying a limited number of candidate IPs specific to the target interaction. Here, we investigate the results of 14 new PEPscan experiments for protein complexes of known 3D structures. We show that for almost all complexes, PEPscan is able to identify candidate IPs that are located at the protein-protein interface. The information it provides about the binding site seems, however, too ambiguous to be exploited in a simple manner to assist the modeling of protein complexes. Moreover, these candidates are associated with false positives. For these, we suggest they could correspond to non-specific binders, which leaves room for further optimization of the PEPscan protocol. Another unexpected advance comes from the observation of the applicability of PEPscan for polysaccharides and labeled peptides, suggesting that PEPscan could become a large spectrum approach to investigate protein-binder interactions, the binder not necessarily being a protein %G English %2 https://cnrs.hal.science/hal-03764419/document %2 https://cnrs.hal.science/hal-03764419/file/biomolecules-2022.pdf %L hal-03764419 %U https://cnrs.hal.science/hal-03764419 %~ INSERM %~ CNRS %~ INC-CNRS %~ UNIV-PARIS %~ UNIVERSITE-PARIS %~ UP-SANTE %~ UP-SCIENCES %~ BFA %~ UTCBS %~ TEST2-HALCNRS