Transglycosylation specificity of Acremonium sp. α-rhamnosyl-β-glucosidase and its application to the synthesis of the new fluorogenic substrate 4-methylumbelliferyl-rutinoside
作者:Laura S. Mazzaferro、Lucrecia Piñuel、Rosa Erra-Balsells、Silvana L. Giudicessi、Javier D. Breccia
DOI:10.1016/j.carres.2011.11.008
日期:2012.1
fungal diglycosidase α-rhamnosyl-β-glucosidase was explored. The biocatalyst was shown to have broad acceptor specificity toward aliphatic and aromatic alcohols. This feature allowed the synthesis of the diglycoconjugated fluorogenic substrate 4-methylumbelliferyl-rutinoside. The synthesis was performed in one step from the corresponding aglycone, 4-methylumbelliferone, and hesperidin as rutinose donor
探索了真菌二糖苷酶α-鼠李糖基-β-葡萄糖苷酶的转糖基化潜力。该生物催化剂显示出对脂族和芳族醇具有广泛的受体特异性。该特征允许合成二糖缀合的荧光底物4-甲基伞形酮-芸香糖苷。由相应的糖苷配基,4-甲基伞形酮和橙皮苷作为芸香糖供体,一步一步进行合成。使用固定化的生物催化剂,在搅拌的反应器中生产4-甲基伞形酮-芸香糖苷,收率约为糖受体的16%。通过溶剂萃取和硅胶色谱法纯化化合物。记录的[M + Na](+)离子的MALDI-TOF / TOF数据与理论单同位素质量相关([M + Na](+)的计算值:507.44 m / z;实测值[M + Na](+) :507.465 m / z)。