Two conformationally constrained templates have been designed to provide selective inhibitors of the coagulation cascade serine protease, Factor Xa (FXa). The most active inhibitor, 2,7-bis[(Z)-p-amidinobenzylidene)]-3,3,6,6-tetramethylcycloheptanone, exhibits a K(i) of 42 nM against FXa, with strong selectivity against thrombin (1000-fold), trypsin (300-fold) and plasmin (900-fold). With only two
已经设计了两种构象受限的模板,以提供凝血级联
丝氨酸蛋白酶因子Xa(FXa)的选择性
抑制剂。活性最高的
抑制剂2,7-双[(Z)-对-基亚苄基)-3,3,6,6-四甲基
环庚酮对FXa的K(i)为42 nM,对凝血酶的选择性强(1000 -倍),胰
蛋白酶(300倍)和纤溶酶(900倍)。仅具有两个可自由旋转的键,分子模型表明一个am基位于S1口袋中,与其他基于am的
抑制剂相似,与Asp189侧链形成氢键,而第二个苯甲nz位于S1口袋的S4口袋中。与S4芳基笼形成牢固的阳离子-π键。