Receptor-based design of dihydrofolate reductase inhibitors: comparison of crystallographically determined enzyme binding with enzyme affinity in a series of carboxy-substituted trimethoprim analogs
作者:Lee F. Kuyper、Barbara Roth、David P. Baccanari、Robert Ferone、Christopher R. Beddell、John N. Champness、David K. Stammers、John G. Dann、Frank E. A. Norrington
DOI:10.1021/jm00381a008
日期:1985.3
Escherichia coli dihydrofolate reductase (DHFR), analogues of trimethoprim (TMP) were designed which incorporated various 3'-carboxyalkoxy moieties in order to acquire ionic interactions with positively charged active-site residues. Certain of these compounds have shown exceptionally high affinity for this enzyme. For example, the 3'-(carboxypentyl)oxy analogue was found to be 55-fold more inhibitory than
通过使用大肠杆菌二氢叶酸还原酶(DHFR)的分子模型,设计了甲氧苄氨嘧啶(TMP)的类似物,该类似物并入了各种3'-羧基烷氧基部分,以便获得带正电荷的活性位点残基的离子相互作用。这些化合物中的某些已显示出对该酶的极高亲和力。例如,发现3'-(羧基戊基)氧基类似物对大肠杆菌DHFR的抑制作用是TMP的55倍(Ki = 0.024 nM,而TMP为1.32 nM)。大肠杆菌DHFR与TMP的二元复合物的X射线晶体学研究和该含酸系列化合物的两个成员定义了这些抑制剂的结合并显示了后两个抑制剂的羧基与Arg-57离子结合。