首页> 外文期刊>Biotechnology Progress >Production of Epigallocatechin Gallate 7-O-alpha-D-Glucopyranoside(EGCG-G1)Using the Glucosyltransferase from Leuconostoc mesenteroides
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Production of Epigallocatechin Gallate 7-O-alpha-D-Glucopyranoside(EGCG-G1)Using the Glucosyltransferase from Leuconostoc mesenteroides

机译:使用肠膜亮绿隐球菌的葡糖基转移酶生产表没食子儿茶素没食子酸酯7-O-α-D-葡萄糖苷(EGCG-G1)

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摘要

Epigallocatechin gallate 7-O-alpha-D-glucopyranoside(EGCG-G1),as a novel compound with a higher water solubility and stability and similar antioxidant effect when compared with epigallocatechin gallate(EGCG),was produced from sucrose as a glucose donor and EGCG as a glucose acceptor by a glucosyltransferase from Leuconostoc mesenteroides.The pH and temperature for maximum EGCG-G1 production by the glucosyltransferase were 5.0 and 25 °C,respectively.The enzyme and substrates concentrations to produce maximum EGCG-G1 were 3.78 units/mL,25 mM sucrose,and 1.5 mM EGCG,respectively.Under these conditions,the glucosyltransferase produced 1.0 mM EGCG-G1 from 1.5 mM EGCG at a reaction time of 180 min,corresponding to formation of 67% product on a mole basis.
机译:表没食子儿茶素没食子酸酯7-O-α-D-吡喃葡萄糖苷(EGCG-G1)是一种新型化合物,与表没食子儿茶素没食子酸酯(EGCG)相比具有更高的水溶性和稳定性,并且具有相似的抗氧化作用,它是由蔗糖作为葡萄糖供体而产生的。肠膜隐球菌的葡糖基转移酶将EGCG用作葡萄糖受体。葡糖基转移酶最大产生EGCG-G1的pH值和温度分别为5.0和25°C。产生最大EGCG-G1的酶和底物浓度分别为3.78单位/ mL分别为25 mM蔗糖和1.5 mM EGCG。在这些条件下,葡萄糖基转移酶在180分钟的反应时间下从1.5 mM EGCG生成1.0 mM EGCG-G1,相当于摩尔生成67%的产物。

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