7-Deazapurine biosynthesis: NMR study of toyocamycin biosynthesis in Streptomyces rimosus using 2-13C-7-15N-adenine
作者:Ugo Battaglia、Jed E. Long、Mark S. Searle、Christopher J. Moody
DOI:10.1039/c0ob01054e
日期:——
mechanistic understanding of their biosynthesis is a longstanding problem. In particular, the obligatory loss of the N-7 nitrogen atom is puzzling, and in order to address this mechanistic conundrum a novel doubly labeled purine, [2-13C, 7-15N]-adenine, has been prepared and used as a biosynthetic precursor to toyocamycin in Streptomyces rimosus. NMR spectroscopy and mass spectrometry clearly showed
尽管7-脱氮嘌呤是众所周知的,并且在超修饰RNA碱基中具有特征 奎宁,以及在一系列核苷抗生素(如丰卡霉素)中,对其生物合成的机理了解是一个长期存在的问题。特别地,N-7的氮原子的强制性损失是令人费解,并且为了解决这个难题机理的新的双标记的嘌呤,[2- 13 C,7- 15 N] -腺嘌呤,已经制备并用作一种生物合成的前霉素的链霉菌。NMR谱和质谱测定清楚地显示的掺入13 C,但损失15 N的产生的toyocamycin。