Biosynthetic Production of [<i>N</i><sup>2</sup>,1,3,7,9-<sup>15</sup>N]Guanosine and [1,3,7,9-<sup>15</sup>N]inosine and conversion into [<i>N</i><sup>6</sup>,1,3,7,9-<sup>15</sup>N]adenosine for structure elucidation of RNA by heteronuclear NMR
作者:Annette C. Niemann、Mónica Meyer、Thomas Engeloch、Oliver Botta、Alfons Hädener、Peter Strazewski
DOI:10.1002/hlca.19950780213
日期:1995.3.22
A procedure was developed for the biosynthetic preparation of 15N-labelled guanosine and inosine through the action of a mutant Bacillus subtilis strain. Crude [N2,1,3,7,9-15N]guanosine and [1,3,7,9-15N]inosine were isolated from the culture filtrate by precipitation and anion-exchange chromatography (Scheme 1). No cell lysis and no enzymatic degradation was necessary. The per-isobutyrylated derivatives
通过突变枯草芽孢杆菌菌株的作用,开发了一种生物合成制备15 N标记的鸟苷和肌苷的程序。粗[ Ñ 2,1,3,7,9- 15 N]鸟苷和[1,3,7,9- 15 N]肌苷从通过沉淀和阴离子交换层析(培养滤液中分离方案1)。无需细胞裂解,也无需酶促降解。全异丁酰化衍生物1和2从复杂的混合物中分离纯化产物,通过不同的亲脂性对其进行纯化,然后分三步进行分离,包括正相和反相硅胶色谱法。一升复杂的营养培养基可产生8.44 mmol的鸟苷衍生物和2.84 mmol的肌苷衍生物,平均富集15 N较高(分别为83.5和91.9原子%)。[ Ñ 6,1,3,7,9- 15 N]腺苷(4)从得到的2',3',5'-三ö异丁酰基[1,3,7,9- 15 N]肌苷(1)通过将其1,2,4-三唑基衍生物与15 NH 3水溶液氨解(方案2)。