Stereoselective Detoxification of Chiral Sarin and Soman Analogues by Phosphotriesterase
作者:Wen-Shan Li、Karin T Lum、Misty Chen-Goodspeed、Miguel A Sogorb、Frank M Raushel
DOI:10.1016/s0968-0896(01)00113-4
日期:2001.8
I106A/F132A/H254Y where the k(cat) values for the R(P)- and S(P)-enantiomers were 410 and 4200 s(-1), respectively. A chemo-enzymatic procedure was developed for the chiral synthesis of the four stereoisomers of O-pinacolyl p-nitrophenyl methylphosphonate (soman analogue) with high diastereomeric excess. The R(P)R(C)-stereoisomer of the soman analogue was the preferred substrate for PTE. The k(cat) values for the
测量了细菌磷酸三酯酶(PTE)对化学战剂沙林和梭曼的一系列手性类似物的催化活性。开发了化学方法,用于以对映体过量过量的方式对位合成对位异丙基对硝基苯基甲基膦酸酯(Sarin类似物)的S(P)-和R(P)-对映体。沙林类似物的R(P)-对映体(k(cat)= 2600 s(-1))是野生型PTE相对于相应S(P)-对映体(k(cat)= 290 s(-1))。使用PTE突变体I106A / F132A / H254Y可以逆转观察到的立体选择性,其中R(P)-和S(P)-对映体的k(cat)值分别为410和4200 s(-1)。开发了一种化学酶促方法,用于手性合成具有高非对映异构体过量度的O-频哪醇对硝基苯基甲基膦酸酯(梭曼类似物)的四种立体异构体。梭曼类似物的R(P)R(C)-立体异构体是PTE的优选底物。梭曼类似物的k(cat)值的测量如下:R(P)R(C,)48 s(-1); R(P)S(C),4