Synthesis of spin-labeled riboswitch RNAs using convertible nucleosides and DNA-catalyzed RNA ligation
作者:Lea Büttner、Jan Seikowski、Katarzyna Wawrzyniak、Anne Ochmann、Claudia Höbartner
DOI:10.1016/j.bmc.2013.04.007
日期:2013.10
properties of functional RNA such as riboswitches. The convertible nucleoside approach is used to install 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO) and 2,2,5,5-tetramethylpyrrolidin-1-oxyl (proxyl) labels at the exocyclic N4-amino group of cytidine and 2′-O-methylcytidine nucleotides in RNA. To obtain site-specifically labeled long riboswitch RNAs beyond the limit of solid-phase synthesis, we report
可以通过电子顺磁共振(EPR)光谱监测的化学稳定的氮氧自由基可以提供有关功能RNA(如核糖开关)的结构和动态特性的信息。可转换核苷方法用于在环外N 4-氨基处安装2,2,6,6-四甲基哌啶-1-氧基(TEMPO)和2,2,5,5-四甲基吡咯烷-1-氧基(脯氨酰基)标签RNA中胞苷和2'- O-甲基胞嘧啶核苷酸的序列 为了获得超出固相合成极限的位点特异性标记的长核糖开关RNA,我们报道了使用体外选择的脱氧核酶作为催化剂的自旋标记RNA的连接,并证明了TEMPO标记的53 nt SAM-III和118 nt SAM-1核糖开关结构域(SAM = S-腺苷甲硫氨酸)。