Application of amylomaltase for the synthesis of salicin-α-glucosides as efficient anticoagulant and anti-inflammatory agents
作者:Prakarn Rudeekulthamrong、Jarunee Kaulpiboon
DOI:10.1016/j.carres.2016.06.011
日期:2016.9
The focus of this study was the synthesis of alpha-glucosyl derivatives of salicin by a transglucosylation reaction. The reaction was catalyzed by recombinant amylomaltase using tapioca starch as a glucosyl donor. Several reaction parameters, such as the enzyme-substrate concentrations, pH, temperature and incubation time, were optimized. Using the optimum conditions, at least three products with retention
这项研究的重点是通过转糖基化反应合成水杨素的α-葡萄糖基衍生物。使用木薯淀粉作为葡糖基供体,通过重组淀粉酶催化该反应。优化了几个反应参数,例如酶-底物浓度,pH,温度和孵育时间。在最佳条件下,观察到至少三种保留时间(Rt)为6.2、9.2和14.1的产品。葡糖基化水杨素衍生物的最大产率为总产物的63%(w / w)。通过酶处理,质谱法和NMR分析的组合,证实葡糖基化水杨素衍生物的结构为水杨素-α-D-吡喃葡萄糖苷,水杨素-α-D-麦芽吡喃糖苷和水杨素-α-D-麦芽三吡喃糖苷。葡萄糖单元之间的糖苷键由α-1,4-构型组成。水杨素-α-D-吡喃葡萄糖苷,水杨素-α-D-麦芽吡喃糖苷和水杨素-α-D-麦芽三吡喃糖苷的水溶性分别比水杨酸高3倍,5倍和8倍,而它们的相对甜度值低于蔗糖。有趣的是,长链水杨素-α-D-葡糖苷显示出比水杨素更大的抗凝和抗炎活性。另外,合成的水杨素-α-D-葡萄糖苷能够耐受