2′-modified-2-thiothymidine oligonucleotides

2′-modified-2-thiothymidine oligonucleotides
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DOI:
10.1021/ol0348607
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发表时间:
2003-08-21
期刊:
影响因子:
5.2
通讯作者:
Manoharan, M
Manoharan, M
中科院分区:
化学1区
文献类型:
--
作者:
Rajeev, KG;Prakash, TP;Manoharan, M

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合成了具有新修饰的寡核苷酸,2 ′-O-[2-(甲氧基)乙基]-2-硫代胸苷和2 ′-脱氧-2 ′-氟-2-硫代胸苷。当与互补RNA杂交时,这些修饰的寡核苷酸表现出非常高的热稳定性。2-O-(2-甲氧基)乙基-2-硫代胸苷修饰的寡核苷酸磷酸二酯对核酸酶的抗性增强(t(1/2)> 24 h),而2 ′-脱氧-2 ′-氟代-2-硫代胸苷修饰的寡核苷酸磷酸二酯对核溶降解的稳定性有限。
graphicOligonucleotides with novel modifications, 2'-O[2-(methoxy)ethyl]-2-thiothymidine and 2'-deoxy-2'-fluoro-2-thiothymidine, have been synthesized. These modified oligonucleotides exhibited very high thermal stability when hybridized with complementary RNA. 2-O-(2-Methoxy)ethyl-2-thiothymidine modified oligonucleotide phosphodiesters showed enhanced resistance toward nucleases (t(1/2) > 24 h), but 2'-deoxy-2'-fluoro-2-thiothymidine modified oligonucleotide phosphodiesters showed limited stablity to nucleotytic degradation.