Stereochemistry of the Inhibition of δ-Chymotrypsin with Optically Active Bicyclic Organophosphates:<sup>31</sup>P-NMR studies
作者:Walter Ganci、Eric J. M. Meier、Franco A. Merckling、Georg Przibille、Urs Ringeisen、Peter Rüedi
DOI:10.1002/hlca.19970800208
日期:1997.3.24
The inhibition of δ-chymotrypsin with optically active, axially and equatorially substituted trans-3-(2,4-dini-trophenoxy)-2,4-dioxa-3λ5-phospbubicyclo[4.4.0]decan-3-ones ( = hexahydro-4H-1,3,2-benzodioxaphosphorin 3-oxides) was investigated. Their inhibitory power was determined by kinetic measurements, and the stereochemical course of the reaction of stoichiometric amounts of the enzyme and inhibitor
δ糜蛋白酶的抑制与光学活性的,轴向和平展取代的反式-3-(2,4-迪尼-trophenoxy)-2,4-二氧杂- 3λ 5 -phospbubicyclo [4.4.0]癸烷-3-酮(=研究了六氢-4 H -1,3,2-苯并二氧杂磷酰基3-氧化物。通过动力学测量确定它们的抑制能力,并用31 P-NMR光谱在pH 7.8监测化学计量的酶和抑制剂反应的立体化学过程。不可逆抑制剂表现出显着的对映选择性((S p)-对映体反应更快),并产生δ-胰凝乳蛋白酶的非对映异构,共价磷酸化衍生物。