Charged Nonclassical Antifolates with Activity Against Gram-Positive and Gram-Negative Pathogens
作者:Eric Scocchera、Stephanie M. Reeve、Santosh Keshipeddy、Michael N. Lombardo、Behnoush Hajian、Adrienne E. Sochia、Jeremy B. Alverson、Nigel D. Priestley、Amy C. Anderson、Dennis L. Wright
DOI:10.1021/acsmedchemlett.6b00120
日期:2016.7.14
classical, negatively charged antifolates such as methotrexate possess high affinity for the dihydrofolate reductase (DHFR) enzyme, they are unable to penetrate the bacterial cell wall, rendering them poor antibacterial agents. Herein, we report a new class of charged propargyl-linked antifolates that capture some of the key contacts common to the classical antifolates while maintaining the ability
尽管经典的带负电荷的抗叶酸药(例如甲氨蝶呤)对二氢叶酸还原酶(DHFR)酶具有很高的亲和力,但它们无法穿透细菌细胞壁,从而使它们成为不良的抗菌剂。在本文中,我们报告了一类新型的带电荷的炔丙基连接的抗叶酸剂,它们捕获了经典抗叶酸剂常见的一些关键接触,同时保持了被动扩散穿过细菌细胞壁的能力。八个合成的化合物对革兰氏阳性金黄色葡萄球菌显示出非凡的效力,对哺乳动物细胞的毒性有限,并且代谢特性良好。这两种化合物的高分辨率晶体结构通过高度有序的水网络揭示了羧酸盐和活性位点残基之间的广泛相互作用。