Stabilisation of a nucleic acid three-way junction by an oligonucleotide containing a single 2′-C to 3′-O-phosphate butylene linkage prepared by a tandem RCM-hydrogenation method
作者:Philip Børsting、Katrine E. Nielsen、Poul Nielsen
DOI:10.1039/b502720a
日期:——
A cyclic dinucleotide with a butylene linker between the upper 2â²-C position and the 3â²-O-phosphate linkage was synthesised from simple nucleoside building blocks via a tandem ring-closing metathesis and hydrogenation procedure. The major of two phosphorus epimers was incorporated into an oligodeoxynucleotide, as well as into an LNAâDNA mixmer oligonucleotide. These were evaluated as parts in three different secondary structures, a duplex, a bulged duplex and a three-way junction, with both DNA and RNA complements. In the DNA : RNA hybrid molecule, the oligodeoxynucleotide containing this single 2â²-C to 3â²-O-phosphate butylene linkage was found to stabilise a three-way junction.
通过串联闭环偏析和氢化过程,从简单的核苷结构单元合成了一种环状二核苷酸,其上部 2â²-C 位置和 3â²-O- 磷酸连接之间带有丁烯连接体。两个磷表聚物的主要部分被整合到一个寡聚脱氧核苷酸和一个 LNAâDNA 混合寡聚核苷酸中。评估结果显示,这些寡核苷酸具有三种不同的二级结构,即双链、凸起双链和三向结,同时具有 DNA 和 RNA 互补。在 DNA 与 RNA 的杂交分子中,发现含有这种单一 2²-C 至 3²-O 磷酸丁烯连接的寡脱氧核苷酸能稳定三向连接。