Synthesis of the tRNA<sup>Lys,3</sup> Anticodon Stem-Loop Domain Containing the Hypermodified ms<sup>2</sup>t<sup>6</sup>A Nucleoside
作者:Ashok C. Bajji、Darrell R. Davis
DOI:10.1021/jo025826t
日期:2002.7.1
adopts a conformation similar to that seen in the solution structure of the analogous t6A containing E. coli tRNA(Lys), despite the presence of the bulky methylthio group. This synthetic approach allows for site-specific incorporation of the hypermodifiednucleoside and should facilitate future studies directed at understanding the roles of nucleoside modification in modulating the stability and specificity
An RNA Complex of the HIV-1 A-Loop and tRNA<sup>Lys,3</sup> Is Stabilized by Nucleoside Modifications
作者:Ashok C. Bajji、Mallikarjun Sundaram、David G. Myszka、Darrell R. Davis
DOI:10.1021/ja028015f
日期:2002.12.1
putative interaction between the primer tRNAanticodon and a conserved A-rich loop in the HIV genome. Surface plasmon resonance was used to demonstrate that the hypermodifiednucleosides in the tRNAanticodon stem loop (ASL) stabilize RNA-RNA interactions in a model for the anticodon/A-loop complex. tRNA ASL hairpins with the modifications of Escherchia coli tRNALys and human tRNALys,3 each form stable
HIV 转录起始复合物涉及引物 tRNA 反密码子和 HIV 基因组中保守的富含 A 环之间的假定相互作用。表面等离子体共振用于证明 tRNA 反密码子茎环 (ASL) 中的超修饰核苷在反密码子/A 环复合物模型中稳定 RNA-RNA 相互作用。带有大肠杆菌 tRNALys 和人类 tRNALys 修饰的 tRNA ASL 发夹,3 各自形成稳定的复合物。部分修饰的 tRNA ASL 以较低的亲和力结合 A 环发夹,并且发现细菌和哺乳动物 tRNA 的修饰对稳定 RNA 复合物做出了不同的贡献。与已知的对 tRNA 结构和功能的修饰效果一致的反密码子/A 环 RNA 复合物模型是互补 tRNA,