Synthesis and properties of oligodeoxyribonucleotides containing 2’-O-(2,3-dihydroxypropyl)- and 2’-O-(2-oxoethyl)arabinouridine residues
作者:T. S. Zatsepin、Yu. M. Ivanova、D. A. Stetsenko、M. J. Gait、T. S. Oretskaya
DOI:10.1007/s11172-005-0243-2
日期:2005.1
2’-O-(2,3-Dihydroxypropyl)arabinouridine-containing oligodeoxyribonucleotides were synthesized starting from a new modified nucleoside, viz., 2’-O-(2,3-dihydroxypropyl)arabinouridine, and the corresponding 3’-phosphoramidite. Oxidation of these oligodeoxyribonucleotides with sodium periodate afforded oligonucleotides containing 2’-O-(2-oxoethyl)arabinouridine residues. Subsequent modification of the aldehyde-containing oligonucleotides involved the reactions with 9-hydrazinoacridine and N-aminooxyacetyl peptide and reductive amination by 4-(1-pyrenyl)butyrohydrazide and biotin hydrazide. Thermal stabilities of duplexes of modified oligodeoxyribonucleotides with complementary oligodeoxyribonucleotides are slightly lower than those of natural duplexes. Duplexes with complementary oligoribonucleotides are substantially destabilized.
以新型的修饰核苷2'-O-(2,3-二羟丙基)阿拉伯糖苷为起始物,合成了含有2'-O-(2,3-二羟丙基)阿拉伯糖苷的寡脱氧核糖核酸,并制备了相应的3'-磷酰胺。这些寡脱氧核糖核酸用过硼酸钠氧化后,生成了含有2'-O-(2-氧乙基)阿拉伯糖苷残基的寡核苷酸。随后对含有醛基的寡核苷酸进行了反应,包括与9-肼基吖啶、N-氨基氧乙酰肽反应,以及通过4-(1-芘基)丁酰肼和生物素肼的还原胺化。修饰寡核苷酸与互补寡核苷酸形成的双链的热稳定性略低于天然双链。与互补核糖寡核苷酸形成的双链显著失稳。