Interaction between human telomeric G-quadruplexes characterized by single molecule magnetic tweezers*

Project supported by the National Natural Science Foundation of China (Grant Nos. 11474346 and 11774407), the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (Grant No. QYZDB-SSW-SLH045), and the National Key Research and Development Program, China (Grant No. 2016YFA0301500).

Wang Yi-Zhou1, 3, Hou Xi-Miao2, Ju Hai-Peng1, Xiao Xue1, 3, Xi Xu-Guang2, Dou Shuo-Xing1, 3, Wang Peng-Ye1, 3, ‡, Li Wei1, §
       

(color online) (a) Schematic setup of magnetic tweezers (not to scale). The 45 nt wtTel45 sequence is tethered between a coverslip and a superparamagnetic bead with two 699 bp and 2271 bp dsDNA handles. (b) Typical trajectory with two distinct ruptures indicate two stable G-quadruplexes formed in wtTel45 sequence.