Design of Bivalent Nucleic Acid Ligands for Recognition of RNA-Repeated Expansion Associated with Huntington’s Disease
作者:Shivaji A. Thadke、J. Dinithi R. Perera、V. M. Hridya、Kirti Bhatt、Ashif Y. Shaikh、Wei-Che Hsieh、Mengshen Chen、Chakicherla Gayathri、Roberto R. Gil、Gordon S. Rule、Arnab Mukherjee、Charles A. Thornton、Danith H. Ly
DOI:10.1021/acs.biochem.8b00062
日期:2018.4.10
they undergo template-directed native chemical ligation to form concatenated oligomeric products that bind tightly to the RNA template. In the absence of an RNA target, they self-deactivate by undergoing an intramolecular reaction to form cyclic products, rendering them inactive for further binding. The work has implications for the design of ultrashort nucleic acid ligands for targeting rCAG-repeat expansion
我们报告了一种新型核酸配体的开发,该配体由 Janus 碱基和 MPγPNA 主链组成,能够通过二价氢键相互作用以序列特异性和选择性方式结合 rCAG 重复序列。单独而言,配体和 RNA 之间的相互作用很弱且短暂。然而,在安装 C 端硫酯和 N 端胱氨酸并还原二硫键后,它们会经历模板引导的天然化学连接,形成与 RNA 模板紧密结合的串联寡聚产物。在没有 RNA 靶标的情况下,它们会通过分子内反应形成环状产物而自我失活,从而使它们失去进一步结合的活性。这项工作对于设计超短核酸配体具有重要意义,该配体用于靶向与亨廷顿病和许多其他相关神经肌肉和神经退行性疾病相关的 rCAG 重复扩增。