Design, synthesis, and evaluation of substituted nicotinamide adenine dinucleotide (NAD+) synthetase inhibitors as potential antitubercular agents
作者:Xu Wang、Yong-Mo Ahn、Adam G. Lentscher、Julia S. Lister、Robert C. Brothers、Malea M. Kneen、Barbara Gerratana、Helena I. Boshoff、Cynthia S. Dowd
DOI:10.1016/j.bmcl.2017.08.012
日期:2017.9
value of 90 µM against Mtb NadE. Our modeling results show that these urea-sulfonamides potentially bind to the intramolecular ammonia tunnel, which transports ammonia from the glutaminase domain to the active site of the enzyme. This hypothesis is supported by data showing that, even when treated with potent inhibitors, NadE catalysis is restored when treated with exogenous ammonia. Most of these compounds
烟酰胺腺嘌呤二核苷酸(NAD +)合成酶催化NAD +生物合成的最后一步。NAD +的消耗对活跃和休眠的结核分枝杆菌(Mtb)均具有杀菌作用。通过抑制Mtb的NAD +合成酶(NadE),我们期望消除NAD +的产生,这将导致生长和非复制Mtb的细胞死亡。已经研究了NadE抑制剂对各种病原体的抑制作用,但很少针对Mtb进行过测试。在这里,我们报道了先前由Brouillette等人报道的一系列脲磺酰胺的扩展。在对接研究的指导下,末端苯环上的取代基发生了变化,以了解该位置上取代基的结构-活性关系。测试化合物作为重组Mtb NadE和Mtb全细胞的抑制剂。尽管母体化合物对Mtb NadE的抑制作用非常弱(IC 50 = 1000 µM),但我们发现优化后的效价提高了10倍。用4-硝基取代母体化合物苯环上的3,4-二氯基团可得到4f,这是该系列化合物中最有效的,其IC 50为50Mtb NadE的90