Conformational restriction approach to β-secretase (BACE1) inhibitors III: Effective investigation of the binding mode by combinational use of X-ray analysis, isothermal titration calorimetry and theoretical calculations
作者:Shuji Yonezawa、Kenichiro Fujiwara、Takahiko Yamamoto、Kazunari Hattori、Hidekuni Yamakawa、Chie Muto、Motoko Hosono、Yoshikazu Tanaka、Toru Nakano、Hiroshi Takemoto、Mitsuhiro Arisawa、Satoshi Shuto
DOI:10.1016/j.bmc.2013.08.036
日期:2013.11
which included isothermal titration calorimetry (ITC), X-ray crystallographic structure analysis and theoretical calculations, to clarify the effect of our conformational restriction approach. From the ITC measurement, the binding entropy of 6 was found to be ∼0.5 kcal larger than that of (R)-3, which is considered to be affected by conformational restriction with a cyclopropane ring.
为了进一步研究BACE1抑制剂使用sp 3杂化碳的构象限制,我们将这种方法应用于6取代的氨基嘧啶酮衍生物3,以通过减少与BACE1结合时的熵能损失来提高抑制活性。间合成8层的立体异构体,[反式- (1' - [R,2' - [R ),6-小号]异构体6表现出最佳BACE1抑制活性,这在统计学上优于相应的乙烯接头化合物(的[R )- 3。组合式考试的约束模式6进行了包括等温滴定热法(ITC),X射线晶体学分析和理论计算在内的实验,以阐明我们构象限制方法的效果。根据ITC测量,发现结合熵6比(R)-3大约0.5 kcal ,这被认为是受环丙烷环构象限制的影响。