{Reference Type}: Journal Article {Title}: Computational insight into the mechanisms of action and selectivity of Afraxis PAK inhibitors. {Author}: Han D;Wang H;Cui W;Zhang B;Chen BZ; {Journal}: Future Med Chem {Volume}: 12 {Issue}: 5 {Year}: 03 2020 {Factor}: 4.767 {DOI}: 10.4155/fmc-2019-0273 {Abstract}: Aim: The p21-activated kinases (PAKs) are involved in many important biological activity regulations. FRAX019, FRAX414, FRAX597, FRAX1036 and G-5555 were identified as PAKs inhibitors. Their detailed inhibitory mechanisms deserve further investigation. Results: Molecular dynamics simulations and further calculations for the PAK1/inhibitor and PAK4/inhibitor complexes indicate that their binding free energies are basically consistent with the trend of experimental activity data. Conclusion: The anchoring of residues Leu347PAK1 and Leu398PAK4 is the structural basis for designing Afraxis PAK inhibitors. This study discloses the inhibitory mechanisms of FRAX019, FRAX414, FRAX597, FRAX1036 and G-5555 toward PAK1 and PAK4 and some clues to enhance kinase activities and selectivities, which will provide valuable information to the development of more potent and selective PAK inhibitors.