Quantitative structure-activity relationship of triazine-antifolate inhibition of Leishmania dihydrofolate reductase and cell growth
作者:Raymond G. Booth、Cynthia Dias Selassie、Corwin Hansch、Daniel V. Santi
DOI:10.1021/jm00390a017
日期:1987.7
the electronic characteristics of the 3-X substituent of the parent triazine molecule. However, L. major DHFR is more sensitive to the steric effects and polarizability of the 3-X substituent. Our results indicate that triazinesinhibit L. major promastigote growth via direct inhibition of DHFR as is shown by the good correlation between log 1/Ki values for inhibition of the purified enzyme and log
已经建立了定量的构效关系,以抑制利什曼原虫主要的二氢叶酸还原酶(DHFR),并通过一系列的4,6-二氨基-1,2-二氢-2,2-二甲基-1来抑制前鞭毛体细胞的生长。 (3-取代的苯基)-s-三嗪s。DHFR的抑制作用与3-X取代基的疏水性修饰变量(pi'3),烷氧基指示剂变量(IOR),通过迭代获得的可抛弃参数(beta)和对空间进行参数化的变量密切相关方程中的效应(MR),log 1 / Ki = 0.65 pi'3-1.22 log(βX 10 pi'3 +1)-1.12IOR + 0.58MRY + 5.05(r = 0.965)。三嗪抑制培养中的主要细菌生长的EC50值与方程log 1 / EC50 = 0.21 pi 3 + 0.44 log 1 / Ki + 0.53(r = 0.960)相关。与人类的DHFR相比,其他脊椎动物与大肠杆菌L. major DHFR的不同之处在于