A series of arginines specifically labeled either with 13C and 15N or with 2H were synthesized and fed to Streptomyces L-1689-23. The streptothricin F isolated in each case was analyzed by either 13C or 2H NMR, respectively, in order to determine the labeling pattern obtained. From these results, it appears that arginine is metabolized to a β-ketoarginine, possibly via a pyridoxal phosphate adduct
合成了一系列用13 C和15 N或2 H专门标记的精
氨酸,并将其喂入链霉菌L-1689-23中。为了确定获得的标记模式,分别通过13 C或2 H NMR分析了在每种情况下分离的链霉菌素F。从这些结果来看,似乎精
氨酸可能通过
吡al醛
磷酸加合物,然后通过环化,还原,重排和羟基化成链霉菌素部分代谢为β-酮精
氨酸。所述途径通常还可以解释其他已知抗生素的形成以及β-羟基-γ-
氨基酸。