Structure-based optimization and biological evaluation of human 20α-hydroxysteroid dehydrogenase (AKR1C1) salicylic acid-based inhibitors
作者:Ossama El-Kabbani、Peter J. Scammells、Tom Day、Urmi Dhagat、Satoshi Endo、Toshiyuki Matsunaga、Midori Soda、Akira Hara
DOI:10.1016/j.ejmech.2010.08.052
日期:2010.11
The tertiary structure of the Leu308Val mutant of human 20α-hydroxysteroid dehydrogenase (AKR1C1) in complex with the inhibitor 3,5-dichlorosalicylic acid (DCL) has been determined. Structures and kinetic properties of the wild-type and mutant enzymes indicate that Leu308 is a selectivity determinant for inhibitor binding. The Leu308Val mutation resulted in 13-fold and 3-fold reductions in the inhibitory
已确定与抑制剂3,5-二氯水杨酸(DCL)配合使用的人20α-羟基类固醇脱氢酶(AKR1C1)的Leu308Val突变体的三级结构。野生型和突变型酶的结构和动力学性质表明Leu308是抑制剂结合的选择性决定因素。Leu308Val突变导致DCL和3-溴-5-苯基水杨酸(BPSA)的抑制力分别降低13倍和3倍。用丙氨酸替代Leu308可使DCL和BPSA的效力分别降低473倍和27倍。为了优化抑制剂的效力和选择性,我们合成了5个取代的3-氯水杨酸衍生物,其中最有效的化合物3-氯-5-苯基水杨酸(K i = 0.86 nM),相对于结构相似的3α-羟基类固醇脱氢酶(AKR1C2),对AKR1C1的选择性高24倍。此外,该化合物在AKR1C1过表达的细胞中抑制孕激素的代谢,其IC 50值等于100 nM。