Synthesis of a homologous series of ketomethylene arginyl pseudodipeptides and application to low molecular weight hirudin-like thrombin inhibitors
作者:John DiMaio、Bernard Gibbs、Jean Lefebvre、Yasuo Konishi、Debra Munn、Shi Yi Yue、Wilfried Hornberger
DOI:10.1021/jm00096a004
日期:1992.9
described. The substitution of the scissile amide function by a ketomethylene group is compatible with the enzyme active site and conferred complete plasma proteolytic stability. This modification also enhanced enzyme affinity up to 20-fold with hirutonin-4 (IIb, n = 4) displaying highest affinity (Ki = 140 +/- 20 pM). Hirutonins 1-4 exhibited potent inhibition of plasma prothrombin time (PT) and activated
据报道设计了低分子量凝血酶抑制剂IIa-d(水杨素),该酶与酶的催化位点和辅助的“阴离子结合异位点”同时结合以识别纤维蛋白原。描述了一种实用的合成所需酮基亚甲基精氨酰二肽插入物[Arg psi CO(CH2)nCO](n = 1-4)的方法,该插入物对应于水杨素的P1-P1'易裂位置。可裂解的酰胺官能团被酮亚甲基取代与酶的活性位点相容,并赋予了其完整的血浆蛋白水解稳定性。这种修饰还可以将酶亲和力提高至20倍,其中Hirutonin-4(IIb,n = 4)显示出最高的亲和力(Ki = 140 +/- 20 pM)。Hirutonins 1-4表现出对血浆凝血酶原时间(PT)和活化的部分凝血活酶时间(aPTT)的有效抑制。该抑制是双相的,并且显示出与相应的Ki的良好相关性。在体内大鼠动静脉分流模型中,水ru素2抑制凝血酶介导的血小板凝集,并显示出与r-水ud素相当的强抗血栓作用(水effect素2的ED15