Synthesis of 1′-phenyl-2′-OMe ribose analogues connecting the thymine base at the 1′ position through a flexible linker for the formation of a stable anti-parallel triplex DNA
作者:Yosuke Taniguchi、Hidenori Okamura、Norihiko Fujino、Shigeki Sasaki
DOI:10.1016/j.tet.2012.11.016
日期:2013.1
We have previously developed the innovative bicyclic nucleoside analogues (WNA) for the formation of the triplex DNA. The WNA analogue consists of an aromatic ring and a recognition base on the bicyclic skeleton, and the recognition of the CG or TA interrupting sites has been achieved by the WNA analogues. However, the stabilization ability of the WNA analogue is dependent on its neighboring nucleobases
我们以前已经开发了用于形成三链DNA的创新性双环核苷类似物(WNA)。WNA类似物由一个芳香环和一个基于双环骨架的识别基团组成,并且CG或TA中断位点的识别已通过WNA类似物实现。但是,WNA类似物的稳定能力取决于其在TFO中的相邻核碱基。我们假设序列依赖性可能源于WNA的双环的固定构象。因此,预期糖部分和核碱基之间的开放连接子可产生柔性并改善核碱基类似物的稳定作用。现在,我们报告设计和合成一种新的核苷类似物,作为WNA-βT(1'-苯基-2'-OMe-核糖衍生物)的开放形式,1)或乙烯连接基(2)。包含3'-dA- 1 -dG上下文的TFO可以识别CG中断位点,而包含3'-dG- 1 - dG上下文的TFO可以识别GC的位点。与此相反,2显示在所有四个碱基对的稳定效果与一些偏好的TFO含有3'-DA- 2 -dG和3'-DG- 2 -dG。这些结果表明,核碱基和核糖部分之间的柔性接头可以改善三链体形成的序列依赖性。