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)。
α-<scp>L</scp>
-Rhamnosyl-β-<scp>D</scp>
-glucosidase (Rutinosidase) from <i>Aspergillus niger</i>
: Characterization and Synthetic Potential of a Novel Diglycosidase
We report the first heterologous production of a fungal rutinosidase (6‐O‐α‐L‐rhamnopyranosyl‐β‐D‐glucopyranosidase) in Pichia pastoris. The recombinant rutinosidase was purified from the culture medium to apparent homogeneity and biochemically characterized. The enzyme reacts with rutin and cleaves the glycosidic linkage between the disaccharide rutinose and the aglycone. Furthermore, it exhibits