Synthesis of oligodeoxynucleotides incorporating 2-N-carbamoylguanine and evaluation of the hybridization properties
作者:Takeshi Sasami、Yoko Odawara、Akihiro Ohkubo、Mitsuo Sekine、Kohji Seio
DOI:10.1016/j.bmc.2008.11.042
日期:2009.2
Previously, we reported 2-N-carbamoylguanine (cmG) as a guanine analog. We further studied the synthetic protocol and hybridization properties of oligodeoxynucleotides (ODNs) incorporating cmG. These ODNs were synthesized using the phosphoramidite of cmG without protection of the 6-O position. However, the isolated products were contaminated with deacylated products having guanine in place of cmG.
以前,我们报道了2- N-氨基甲酰基鸟嘌呤(cmG)作为鸟嘌呤类似物。我们进一步研究了整合cmG的寡脱氧核苷酸(ODNs)的合成方案和杂交特性。这些ODN是使用cmG的亚磷酰胺合成的,没有保护6- O位置。然而,分离的产物被具有鸟嘌呤代替cmG的脱酰产物污染。合成过程的详细分析表明,脱酰作用是由氨基甲酰基部分与封端剂反应引起的。保护6- O位置抑制了副反应。分析了掺入cmG的DNA双链体的热稳定性。T m的分析 值表明,取决于侧翼碱基,cmG的碱基区分能力与标准鸟嘌呤相当或更高。