棒状链霉菌无细胞提取物将头孢菌素转化为7α-甲氧基头孢菌素。
The conversion of cephalosporins to 7 alpha-methoxycephalosporins by cell-free extracts of Streptomyces clavuligerus.
作者信息
O'Sullivan J, Abraham E P
出版信息
Biochem J. 1980 Feb 15;186(2):613-6. doi: 10.1042/bj1860613.
Abstract
In the presence of S-adenosylmethionine, 2-oxoglutarate, Fe2+ and a reducing agent, cell-free extracts of Streptomyces clavuligerus convert cephalosporin C and O-carbamoyldeacetylcephalosporin C into 7 alpha-methoxy derivatives. No synthesis of a 7 alpha-methoxy derivative of deacetylcephalosporin C was detected in the system used, and the 7 alpha-methoxy derivative of deacetoxycephalosporin C was produced only in relatively small amounts. It appears that the 7 alpha-methoxy group is introduced after the cephalosporin ring system has been formed and that its introduction may represent the final step in a biosynthetic pathway.
摘要
在存在S-腺苷甲硫氨酸、2-氧代戊二酸、Fe2+和一种还原剂的情况下，棒状链霉菌的无细胞提取物可将头孢菌素C和O-氨甲酰脱乙酰头孢菌素C转化为7α-甲氧基衍生物。在所使用的体系中未检测到脱乙酰头孢菌素C的7α-甲氧基衍生物的合成，且去乙酰氧基头孢菌素C的7α-甲氧基衍生物仅以相对少量产生。似乎7α-甲氧基是在头孢菌素环系统形成后引入的，并且其引入可能代表生物合成途径中的最后一步。
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