Sulfamide-Based Inhibitors for Carboxypeptidase A. Novel Type Transition State Analogue Inhibitors for Zinc Proteases
作者:Jung Dae Park、Dong H. Kim、Seung-Jun Kim、Joo-Rang Woo、Seong Eon Ryu
DOI:10.1021/jm020258v
日期:2002.11.1
the zinc ion and functional groups at the active site of CPA, which is reminiscent of the postulated stabilization mode of a tetrahedral transition state in the CPA-catalyzed hydrolysis of a peptide substrate. On the basis of the design rationale and the binding mode of (S)-1a to CPA shown by X-ray crystallographic analysis, the present inhibitors are inferred to be a novel type of transition state
合理地设计了氨基末端具有不同烷基的N-氨磺酰基苯基丙氨酸及其衍生物作为羧肽酶A(CPA)的过渡态类似物抑制剂,并进行了合成。在CPA抑制测定中,具有(S)-构型的母体化合物,即(S)-1a,显示出有效的抑制活性,其K(i)值为0.64 microM。它的对映异构体显示效力低得多(K(i)= 470 microM)。在(S)-1a的末端氨基上引入烷基如甲基或异丙基大大降低了抑制能力。在(S)-1a的内部氨基上引入甲基也引起抑制活性的急剧降低。通过单晶X射线衍射确定的CPA x(S)-1a配合物的结构表明,氨磺酰基部分与CPA活性位点的锌离子和官能团相互作用,这使人想起了CPA x(S)-1a的稳定模式。 CPA催化的肽底物水解中的四面体过渡态。根据X射线晶体学分析表明的设计原理和(S)-1a与CPA的结合方式,推断本发明的抑制剂是一种新型的CPA过渡态类似物抑制剂。