The design, synthesis and biological evaluation of novel thiamin diphosphate analog inhibitors against the pyruvate dehydrogenase multienzyme complex E1 from Escherichia coli
作者:Lingling Feng、Junbo He、Haifeng He、Lulu Zhao、Lingfu Deng、Li Zhang、Lin Zhang、Yanliang Ren、Jian Wan、Hongwu He
DOI:10.1039/c4ob01347f
日期:——
Pyruvate dehydrogenase multienzyme complex E1 (PDHc E1) is a potential target enzyme when looking for inhibitors to combat microbial disease. In this study, we designed and synthesized a series of novel thiamin diphosphate (ThDP) analogs with triazole ring and oxime ether moieties as potential inhibitors of PDHc E1. Their inhibitory activities against PDHc E1 were examined both in vitro and in vivo
丙酮酸脱氢酶多酶复合物E1(PDHc E1)是寻找与微生物疾病作斗争的抑制剂时潜在的目标酶。在这项研究中,我们设计和合成了一系列新颖的硫胺二磷酸(ThDP)类似物,它们具有三唑环和肟醚部分作为PDHc E1的潜在抑制剂。他们的抑制活性对PDHc E1进行了体外和体内检查。大多数测试化合物对PDHc E1表现出中等抑制作用(IC 50 = 6.1–75.5μM)。强大的抑制剂4g,4h和4j在体外具有较强的抑制活性,对PDHc E1的IC 50值为6.7、6.9和6.1μM并且在100μgmL -1的体内对玉米赤霉病菌的体内抑制率分别为35%,50%和33%。通过分子对接法分析了4j与PDHc E1的结合方式。此外,通过定点诱变,酶促测定和光谱荧光研究检查了PDHc E1重要残基与化合物4j的可能相互作用。理论和实验结果吻合良好,表明化合物4j可用作进一步优化的先导化合物,并且可能具有作为新型杀菌剂的潜力。