Ligand binding cooperativity: Bioisosteric replacement of CO with SO2 among thrombin inhibitors
作者:Ahmed M. Said、David G. Hangauer
DOI:10.1016/j.bmcl.2016.07.024
日期:2016.8
Ligand–protein binding is a complex process that involves the formation of number of non-covalent interactions, e.g. H-bonds and hydrophobic interactions, between the ligand and the protein host. Upon binding, ligand functional groups can act synergistically (positive cooperativity) to improve the overall ligand binding affinity beyond what would be expected from their individual contributions. In
配体与蛋白质的结合是一个复杂的过程,涉及在配体与蛋白质宿主之间形成许多非共价相互作用,例如H键和疏水相互作用。结合后,配体官能团可以协同作用(正协同作用),以提高总体配体结合亲和力,超出其各自贡献的预期范围。在这项研究中,使用凝血酶作为蛋白质模型系统,我们评估了用磺酰基官能团生物等位取代羰基官能团对其与凝血酶的H键之间的正协同作用以及相邻S3口袋中的疏水结合的影响。当用磺酰基取代羰基时,观察到的正协同性大大降低。