作者:Andrew J. Marsh、David M. Williams、Jane A. Grasby
DOI:10.1039/b404150j
日期:——
Polyamines stabilise nucleic acids against chemical and enzymatic degradation, facilitate the formation of secondary and tertiary structures and enhance cellular uptake. Therefore methods for the syntheses of polyamineânucleic acid conjugates are of interest. A route for the syntheses of RNAâspermine conjugates has been developed. The polyamine was introduced to the C-5 position of uridine via an ethyl tether and the molecule elaborated into a synthon suitable for oligoribonucleotide assembly. The resultant oligomers were components of the hairpin ribozyme. Characterisation of the spermine-conjugated catalytic RNA revealed that attachment of the polyamine was well tolerated in three of four positions, namely U41, U37 and U34, suggesting that conjugation to C-5 brings about minimal structural perturbation.
多胺能稳定核酸,防止化学和酶降解,促进二级和三级结构的形成,并提高细胞的吸收能力。因此,多胺与核酸共轭物的合成方法备受关注。我们开发了一条合成核糖核酸与精胺共轭物的途径。通过乙基拴将多胺引入尿苷的 C-5 位,并将分子细化为适合寡核苷酸组装的合成物。由此产生的寡聚体是发夹核糖酶的组成部分。对与精胺共轭的催化 RNA 进行表征后发现,多胺在四个位置(即 U41、U37 和 U34)中的三个位置的附着耐受性很好,这表明与 C-5 共轭对结构的扰动很小。