摘要:
Although mutated Ras protein is well recognized as an important drug target, direct targeting Ras has proven to be a daunting task. Recent studies demonstrated that Ras protein needs PDE delta to relocate to plasma membrane to execute its signaling transduction function, which provides a new avenue for modulating the Ras protein. To find small molecules antagonizing the interactions between PDE delta and Ras, here we presented a successful application of fragment-based drug discovery of PDE delta inhibitors. Under the guidance of crystal structures, we are able to quickly optimize the initial fragment into highly potent inhibitors, with more than 2000-fold improvement in binding activity, which further adds to the arsenal towards the inhibition of Ras signaling in cancer therapy. (C) 2018 Elsevier Masson SAS. All rights reserved.