Figure 2.
POT1-TPP1 binds and destabilizes 6ThT22 G4s. (A) Stoichiometric binding EMSAs of POT1-TPP1 with 6ThT22 in K+ buffer. (B) Experimental (black) and modeled (orange) sensorgrams to describe the interactions of immobilized 6ThT22 with POT1-TPP1 proteins in K+ buffer. (C) Time-dependent changes in ellipticity of 6ThT22 with or without POT1-TPP1. (D) Plot showing changes in CD amplitude (295 nm) of 6ThT22 DNA as a function of increasing molar ratio of POT1-TPP1 protein:DNA. (E) Kinetic model for protein binding and G4 unfolding of 6ThT22 in K+. (F) Correlation between EMSA experimental data and fitted data using kinetic model.