3-Deoxy-3-fluoropyridoxamine 5‘-Phosphate: Synthesis and Chemical and Biological Properties of a Coenzyme B<sub>6</sub> Analog
作者:Patricia A. Pieper、Ding-yah Yang、Hui-qiang Zhou、Hung-wen Liu
DOI:10.1021/ja9632668
日期:1997.2.1
The C-3 deoxygenation of CDP-6-deoxy-l-threo-d-glycero-4-hexulose is the key step in the biosynthesis of ascarylose which is a 3,6-dideoxy sugar found in the lipopolysaccharide of Yersinia pseudotuberculosis. This transformation, achieved by the catalysis of CDP-6-deoxy-l-threo-d-glycero-4-hexulose-3-dehydrase (E1) and CDP-6-deoxy-l-threo-d-glycero-4-hexulose-3-dehydrase reductase (E3), is initiated
CDP-6-deoxy-l-threo-d-glycero-4-hexulose 的 C-3 脱氧是蛔虫糖生物合成的关键步骤,蛔虫糖是在假结核耶尔森氏菌的脂多糖中发现的 3,6-双脱氧糖。这种转化是通过 CDP-6-deoxy-l-threo-d-glycero-4-hexulose-3-dehydrase (E1) 和 CDP-6-deoxy-l-threo-d-glycero-4-hexulose 的催化实现的-3-脱水酶还原酶 (E3) 由可逆脱水启动,然后从 NADH 逐步电子转移以还原生成的葡萄糖 - PMP 加合物。在 E1-E3 催化过程中,EPR 检测到一种有机自由基中间体,其特征与苯氧基自由基一致。假设它的形成涉及葡萄糖-PMP 中间体的互变异构化为 PMP-醌甲基化物物种,然后在还原过程中充当电子受体。为了获得支持该机制的进一步实验证据,合成了标题化合物 (F-PMP)