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). |
(color online) Folding and unfolding kinetics of two G-quadruplexes in mutant Tel45 sequence. (a) Trajectories (upper panel) under different constant tensions (lower panel) show two ruptures of G-quadruplex. (b) Relationships between rate constant ku, kf, and tension F. (c) Near Feq, similar folding and unfolding kinetics of G-quadruplex. For the first G-quadruplex, τ0 = 4.2 s (left panel), and for the second G-quadruplex, τ0 = 3.6 s (right panel). |