Drug Design for XRCC4 in Silico

XRCC4-DNA ligase IV complex is critical in nonhomologous end-joining DNA repair system. Inhibition of its formation is potential in cancer cell killing, while no related study was reported. Herein, the structure-based drug design was used to develop potent compounds in this study. Firstly, the Traditional Chinese Medicine database was employed to dock into the binding site of XRCC4; then the top 10 output compounds were regarded as the scaffolds for further de novo evolution. Secondly, 99 diversities outcome were screened by Lipinski´s Rule (rules of five) and the survivors were put into the second round of docking study. As a result, diversities with higher DockScore than the top 10 of DockScore from the first round were selected for pose analysis. Finally, 8 diversities were suggested to behave strongest inhibitory effects on XRCC4-DNA ligase IV complex formation. The 8 candidates selected by this study may serve as potent personalized anticancer drugs.