Phosphorodithioates: synthesis and evaluation of new haptens for the generation of antibody acyl transferases
作者:Oliver Brümmer、Paul Wentworth、David P. Weiner、Kim D. Janda
DOI:10.1016/s0040-4039(99)01501-4
日期:1999.10
reactions is described. It is based on the enlistment of phosphorodithioate 1 as a stable mimic of the putative tetrahedral intermediate (TI−) formed during the base-catalyzed hydrolysis of bisaryl carbonate 2. Six members of a library of 25 monoclonal antibodies elicited to 1 catalyze the hydrolysis of 2. The most efficient catalyst, 48F10, exhibits Michaelis-Menten kinetics [Km(2)=686 μM, kcat(2)=2.7 min−1
描述了过渡态类似物(TSA)半抗原方法的扩展,用于引发酰基转移反应的催化抗体。它是基于二硫代磷酸酯的征募1作为推定的四面体中间体的稳定模拟物(TI - )双芳基碳酸酯的碱催化的水解过程中形成的2。25个单克隆抗体文库中的6个成员引发1催化2的水解。最有效的催化剂,48F10,表现出的Michaelis-Menten动力学[ ķ米(2)= 686 μ男,ķ猫(2)= 2.7分钟-1,,是迄今为止报道的最活跃的碳酸盐水解抗体之一。该报告重点介绍了半抗原的实用性,该半抗原结合了用硫磺取代更传统的TSA方法中存在的非桥连磷(V)氧原子,从而为酰基转移过程提供了有效的催化剂。