Enzymatic synthesis of 3-deoxy- d -manno-octulosonic acid (KDO) and its application for LPS assembly
作者:Liuqing Wen、Yuan Zheng、Tiehai Li、Peng George Wang
DOI:10.1016/j.bmcl.2016.04.061
日期:2016.6
efficient enzymatic system for the facile synthesis of KDO from easy-to-get starting materials is described. In this one-pot three-enzyme (OPME) system, d-ribulose 5-phosphate, which was prepared from d-xylose, was employed as starting materials. The reaction process involves the isomerization of d-ribulose 5-phosphate to d-arabinose 5-phosphate catalyzed by d-arabinose 5-phosphate isomerase (KdsD), the
3-脱氧-d-甘露辛糖酸(KDO)的研究由于其可用性有限而受到阻碍。本文描述了一种有效的酶系统,用于从易于获得的起始材料轻松合成 KDO。在该一锅三酶(OPME)系统中,采用由d-木糖制备的d-核酮糖5-磷酸作为起始原料。反应过程包括在d-阿拉伯糖5-磷酸异构酶(KdsD)催化下,d-核酮糖5-磷酸异构化为d-阿拉伯糖5-磷酸;在d-阿拉伯糖5-磷酸异构酶(KdsD)催化下,d-阿拉伯糖5-磷酸与磷酸烯醇丙酮酸(PEP)进行羟醛缩合。 KDO 8-磷酸合成酶(KdsA),以及KDO 8-磷酸磷酸酶(KdsC)催化的KDO-8-磷酸水解。通过使用该OPME系统,获得了72%的分离产率。获得的KDO通过来自大肠杆菌(WaaA)的KDO转移酶进一步转移至脂质A。