An improved process for preparation of ceftriaxone sodium of formula (II),
is disclosed.
本发明揭示了一种改进的制备式(II)头孢曲松钠的方法。
Characterization and engineering of cephalosporin C acylases to produce 7-Aminocephalosporanic acid
作者:Xiangying Li、Jingang Wang、Wencheng Su、Congcong Li、Ge Qu、Bo Yuan、Zhoutong Sun
DOI:10.1016/j.mcat.2023.113595
日期:2023.11
8-fold increase in specific enzymatic activity (6.1 U/mg) was obtained compared to the wild-type enzyme. The engineered variant also enabled the hydrolysis of a variety of β-lactam antibiotics including Penicillin G and phenylacetyl-7-aminodeacetoxycephalosporanic acid (G-7-ADCA). Overall, this study discovered new CCAs from distinct bacterial origins and enabled the synthesis of various core β-lactam
7-氨基头孢烷酸(7-ACA)是合成β-内酰胺类抗生素的核心核。头孢菌素 C 酰化酶 (CCA) 是一类能够将头孢菌素 C (CPC) 水解为 7-ACA 的酶。在这项研究中,我们鉴定、表征并设计了新的 CCA 来制备 7-ACA。使用组合活性位点饱和测试(CAST)和迭代进化进行多轮半理性酶设计后获得最佳突变体A14(L159S/A419V)。与野生型酶相比,酶比活性增加了 2.8 倍(6.1 U/mg)。该工程变体还能够水解多种 β-内酰胺抗生素,包括青霉素 G 和苯乙酰基-7-氨基脱乙酰氧基头孢菌酸 (G-7-ADCA)。全面的,
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