Acridine-Labeled Primers as Tools for the Study of Nonenzymatic RNA Oligomerization
作者:Markus Kurz、Karin Göbel、Christian Hartel、Michael W. Göbel
DOI:10.1002/hlca.19980810528
日期:——
Short, dye-labeled oligonucleotides have been used as primers in template-controlled polymerization reactions of RNA. The synthesis of appropriate acridine derivatives and their attachments to nucleic acids is described. In the nonenzymatic oligomerization of 2-methyl-1H-imidazole-activated guanosine 5′-monophosphate, two observations deserve special notice: (1) reaction rates are almost unchanged
短的,染料标记的寡核苷酸已用作RNA的模板控制聚合反应中的引物。描述了合适的a啶衍生物的合成及其与核酸的连接。在2-甲基-1 H-咪唑活化的鸟苷5'-单磷酸的非酶促低聚反应中,有两个发现值得特别注意:(1)反应速度几乎不受Na +浓度变化的影响;(2)引物-模板双链体的构象类型(A对B)对RNA寡聚化的速率和产率具有相当大的影响。在1M Na +或K +存在下研究胞苷的掺入,该过程几乎被oligo-dG模板的四链体形成所抑制。但是,如果省略这些阳离子,则使用高达100μM的模板浓度可以观察到有效的引物延伸。RNA的非酶促自我复制的机会因此可能比以前设想的要好得多。