A New Route to 2‘-<i>O</i>-Alkyl-2-thiouridine Derivatives via 4-<i>O</i>-Protection of the Uracil Base and Hybridization Properties of Oligonucleotides Incorporating These Modified Nucleoside Derivatives
作者:Itaru Okamoto、Koh-ichiroh Shohda、Kohji Seio、Mitsuo Sekine
DOI:10.1021/jo035246b
日期:2003.12.1
Oligonucleotides containing 2-thiouridine (s2U) in place of uridine form stable RNA duplexes with complementary RNAs. Particularly, this modified nucleoside has proved to recognize highly selectively adenosine, the genuine partner, without formation of a mismatched base pair with the guanosine counterpart. In this paper, we describe new methods for the synthesis of 2-thiouridine and various 2'-O-alkyl-2-thiouridine
含有2-硫尿苷(s2U)代替尿苷的寡核苷酸与互补RNA形成稳定的RNA双链体。特别地,已证明该修饰的核苷可高度选择性地识别真正的腺苷腺苷,而不会与鸟苷对应物形成错配的碱基对。在本文中,我们描述了合成2-硫尿苷和各种2'-O-烷基-2-硫尿苷衍生物的新方法。合成了具有这些修饰的核苷衍生物的寡核糖核苷酸,并通过这些修饰的核苷的1 H NMR分析和带有互补RNA链的RNA双链体的Tm实验,详细研究了它们的杂交和结构特性。