Carba-LNA-<sup>5Me</sup>C/A/G/T Modified Oligos Show Nucleobase-Specific Modulation of 3′-Exonuclease Activity, Thermodynamic Stability, RNA Selectivity, and RNase H Elicitation: Synthesis and Biochemistry
作者:RamShankar Upadhayaya、Sachin Gangadhar Deshpande、Qing Li、Ramakant Asaram Kardile、Aftab Yusuf Sayyed、Eknath Kamalakar Kshirsagar、Rahul Vilas Salunke、Shailesh Satish Dixit、Chuanzheng Zhou、András Földesi、Jyoti Chattopadhyaya
DOI:10.1021/jo200073q
日期:2011.6.3
found to be degraded 4 times faster than cLNA-A and G modified counterparts. By appropriately choosing the carba-LNA modification sites in AON strands, the digestion of AON:RNA can be either totally repressed or be limited to cleavage at specific sites or at a single site only (similar to that of catalytic RNAzyme or DNAzyme). Considering all physico- and biochemical aspects of cLNA modified oligos
使用分子内5-外-5-己烯基作为关键的环化步骤,我们先前报道了羰基-LNA胸腺嘧啶(cLNA-T)的明确合成,随后将其掺入反义寡核苷酸(AON)中并研究了它们的生化特性[ J.上午 化学 Soc。2007年,129(26),8362–8379]。这些掺入cLNA-T的寡核苷酸对AON:RNA异源双链体的特异性RNA亲和力为+ 3.5–5°C /修饰,与LNA(锁定核酸)的亲和力相当。然而,与LNA修饰的对应物相比,这些修饰的寡核苷酸在血清中显示出显着增强的核酸酶稳定性(约100倍),而不会损害任何RNase H募集能力。我们在此报告了5-甲基胞嘧啶-1-基(MeC),cLNA的9-腺嘌呤基(A)和9-胍基(G)衍生物及其寡核苷酸,并报告了其作为潜在的RNA导向抑制剂的生化特性。在一系列等序的碳氧-LNA修饰的AON中,我们在这里显示所有cLNA修饰的AON被发现具有RNA选择性,但是7'-