The paper Chemical Space Guided Discovery of Antimicrobial Bridged Bicyclic Peptides Against Pseudomonas aeruginosa and its Biofilms has been accepted for publication by Chemical Sciences.

Herein we report the discovery of antimicrobial bridged bicyclic peptides (AMBPs) active against Pseudomonas aeruginosa, a highly problematic Gram negative bacterium in the hospital environment. Two of these AMBPs show strong biofilm inhibition and dispersal activity and enhance the activity of Polymyxin, currently a last resort antibiotic against which resistance is emerging. To discover our AMBPs we used the concept of chemical space, which is well known in the area of small molecule drug discovery, to define a small number of test compounds for synthesis and experimental evaluation. Our chemical space was calculated using 2DP, a new topological shape and pharmacophore fingerprint for peptides. This method provides a general strategy to search for bioactive peptides with unusual topologies and expand the structural diversity of peptide-based drugs.

Author(s): Ivan Dibonaventura, Xian Jin, Ricardo Visini, Daniel Probst, Sacha Javor, Bee-Ha Gan, Gaelle Michaud, Antonino Natalello, Silvia Maria Doglia, Thilo Kohler, Christian van Delden, Achim Stocker, Tamis Darbre and Jean-Louis Reymond