A Facile Enzymatic Synthesis of Isotopically Labeled 2-Methyl-D-erythritol 2,4-Cyclodiphosphate by Spinach Chloroplast Stroma
作者:Wenyun Gao、Maja Raschke、Henriette Alpermann、Meinhart H. Zenk
DOI:10.1002/hlca.200390301
日期:2003.11
solve intracellular transport problems, we have developed a facile enzymatic preparation of 2-methyl-D-erythritol 2,4-cyclodiphosphate in highly radioactive form. Use has been made of spinach chloroplast stroma, as well as the stroma of Capsicum annuum and Narcissus pseudonarcissus chromoplasts, which were shown to transform differently labeled 1-deoxy-D-xylulose 5-phosphate quantitatively into that cyclic
为了研究植物和微生物中磷酸脱氧木酮糖磷酸酯途径的最终和倒数第二步,并解决细胞内运输问题,我们开发了一种以高放射性形式的2-甲基-D-赤藓糖醇2,4-环二磷酸的简便酶制剂。 。使用已经取得了菠菜叶绿体基质,以及作为基质的辣椒和水仙色质体,其显示出定量转化不同标记的1-脱氧d木酮糖-5-磷酸转化成该环状二磷酸在辅因子的存在。该方法也可用于合成毫克量的13 C标记的环状二磷酸酯。结果表明重组大肠杆菌脱氧木酮糖磷酸合酶具有催化活性,可用于合成标记的起始原料,以进行进一步的酶促作用以及完整植物的饲喂。已经测定了5-磷酸脱氧木酮糖和环状二磷酸酯的pH和温度稳定性。均匀地13 C-或14 C标记的丙酮酸盐,并均匀地13 C-或14 C标记的d-3-磷酸甘油醛以几乎定量的产率合成了从均匀13 C-或14 C标记的d-葡萄糖途中到脱氧木酮糖5-磷酸。