2′-Alkynylnucleotides: A Sequence- and Spin Label-Flexible Strategy for EPR Spectroscopy in DNA
作者:Marius M. Haugland、Afaf H. El-Sagheer、Rachel J. Porter、Javier Peña、Tom Brown、Edward A. Anderson、Janet E. Lovett
DOI:10.1021/jacs.6b05421
日期:2016.7.27
Electron paramagnetic resonance (EPR) spectroscopy is a powerful method to elucidate molecular structure through the measurement of distances between conformationally well-defined spin labels. Here we report a sequence-flexible approach to the synthesis of double spin-labeled DNA duplexes, where 2'-alkynylnucleosides are incorporated at terminal and internal positions on complementary strands. Post-DNA
电子顺磁共振 (EPR) 光谱是一种通过测量构象明确定义的自旋标记之间的距离来阐明分子结构的强大方法。在这里,我们报告了一种序列灵活的方法来合成双自旋标记的 DNA 双链体,其中 2'-炔基核苷结合在互补链的末端和内部位置。DNA 合成后铜催化的叠氮化物-炔环加成 (CuAAC) 反应与各种自旋标记物能够使用双电子-电子共振实验来测量双链体上的多个距离,提供高水平的详细结构信息。