A novel strategy to improve the aromatic alcohols tolerance of enzyme for preparative-scale synthesis of natural glycosides
作者:Youzhi Zhou、Lu Zhao、Ke Liu、Jinsong Zhang、Jianlin Chu、Bingfang He
DOI:10.1016/j.catcom.2017.07.025
日期:2017.12
Aromatic alcohols are liable to result in enzyme inactivation. A novel strategy was established for improving the aromatic alcohol tolerance of β-galactosidase (BMG) from Bacillus megaterium YZ08. The half-life of BMG in 200 mM vanillyl alcohol solution was dramatically increased by 9–123 times with the addition of hydrophilic solvents. In 30% DMSO, the reaction concentration of aromatic alcohol could
Synthesis, Biological Activity of Salidroside and Its Analogues
作者:Yibing Guo、Yahong Zhao、Cheng Zheng、Ying Meng、Yumin Yang
DOI:10.1248/cpb.58.1627
日期:——
Salidroside is a phenylpropanoid glycoside isolated from Rhodiola rosea L., a traditional Chinese medicinal plant, and has displayed a broad spectrum of pharmacological properties. In this paper, about 18 novel salidroside analogues were prepared through Koenigs–Knorr method, the effects of these compounds over PC12 was assessed with the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) method. The novel compounds differ in the substituents attached to the benzene ring or in the glycosyl donor. According to the data, compounds (3,5-dimethoxyphenyl)methyl β-D-glucopyranoside and (3,5-dimethoxyphenyl)methyl β-D-galactopyranoside with methoxy group at 3 and 5-positions of the benzene ring were the most viability at concentration of 300 μmol/l and 60 μmol/l, respectively.