Enhancement of Hydrophobic Interactions and Hydrogen Bond Strength by Cooperativity: Synthesis, Modeling, and Molecular Dynamics Simulations of a Congeneric Series of Thrombin Inhibitors
作者:Laveena Muley、Bernhard Baum、Michael Smolinski、Marek Freindorf、Andreas Heine、Gerhard Klebe、David G. Hangauer
DOI:10.1021/jm9016416
日期:2010.3.11
that engages in a hydrogen bond with Gly 216. The first series of inhibitors has a m-chlorobenzyl moiety binding in the S1 pocket, and the second has a benzamidine moiety. When the adjacent hydrogen bond is present, the enhanced binding affinity per Å2 of hydrophobic contact surface in the S3 pocket improves by 75% and 59%, respectively, over the inhibitors lacking this hydrogen bond. This improvement
通过计算方法准确预测配体与其受体的结合亲和力是基于结构的药物设计的主要挑战之一。这些预测中潜在的重大错误之一是非共价相互作用的配体结合亲和力贡献是可加的共同假设。本文中,我们介绍了从两个单独的凝血酶抑制剂系列中获得的数据,这些凝血酶抑制剂的大小不断增加,并结合在S3口袋中,并带有或不带有与Gly 216氢键键合的相邻胺的疏水侧链。一米的S1'袋-氯苄基部分结合,并且所述第二具有苄脒部分。当相邻氢键存在时,增强的每的结合亲和力2与缺少该氢键的抑制剂相比,S3袋中疏水接触表面的表面张力分别提高了75%和59%。每结合亲和力的这种改进2演示了疏水相互作用和氢键间的协同性。