Novel NQO1 substrates bearing two nitrogen redox centers: Design, synthesis, molecular dynamics simulations, and antitumor evaluation
作者:Qijie Gong、Pengfei Wang、Tian Li、Zhan Yu、Le Yang、Chenyang Wu、Jiabao Hu、Fulai Yang、Xiaojin Zhang、Xiang Li
DOI:10.1016/j.bioorg.2023.106480
日期:2023.5
skeleton bearing two nitrogen redox centers were designed by introducing amines or hydrazines to fit with the novel binding region of NQO1. Compound 24 with a (4-fluorophenyl)hydrazine substituent was identified as the most efficient substrate for NQO1 with the reduction rate and catalytic efficiency of 1972 ± 82 μmol NADPH/min/μmol NQO1 and 6.4 ± 0.4 × 106 M-1s-1, respectively. Molecular dynamics (MD) simulation
通过分析 NQO1 的晶体结构,发现了配体的额外结合区域。在这项研究中,通过引入胺或肼设计了一系列具有带有两个氮氧化还原中心的新型骨架的衍生物,以适应 NQO1 的新型结合区域。具有(4-氟苯基) 肼取代基的化合物24被确定为 NQO1 最有效的底物,还原率和催化效率分别为 1972 ± 82 μmol NADPH/min/μmol NQO1 和 6.4 ± 0.4 × 10 6 M -1 s - 1,分别。分子动力学 (MD) 模拟显示氧化还原中心的氮原子与关键的 Tyr128 和 Tyr126 残基之间的距离为 3.5 Å (N 1-Tyr128) 和 3.4 Å (N 2 -Tyr126)。化合物24(IC 50 /A549 = 0.69 ± 0.09 μM)通过 NQO1 介导的氧化还原循环产生 ROS,在体外和体内对 A549 细胞显示出有效的抗肿瘤活性,从而成为有前途的 NQO1