Displacement of Mn2+ from RNA by K+, Mg2+, neomycin B, and an arginine-rich peptide: indirect detection of nucleic acid/ligand interactions using phosphorus relaxation enhancement.

@article{Summers2002DisplacementOM,
  title={Displacement of Mn2+ from RNA by K+, Mg2+, neomycin B, and an arginine-rich peptide: indirect detection of nucleic acid/ligand interactions using phosphorus relaxation enhancement.},
  author={Jack S. Summers and John C. Shimko and Fredric L Freedman and Christopher T Badger and Michael Sturgess},
  journal={Journal of the American Chemical Society},
  year={2002},
  volume={124 50},
  pages={14934-9}
}
We have developed a novel method to study the interactions of nucleic acids with cationic species. The method, called phosphorus relaxation enhancement (PhoRE), uses (1)H-detected (31)P NMR of exogenous probe ions to monitor changes in the equilibrium between free Mn(2+) and Mn(2+) bound to the RNA. To demonstrate the technique, we describe the interactions of four RNA molecules with metal ions (K(+) and Mg(2+)), a small molecule drug (neomycin b), and a cationic peptide (RSG1.2). In each case… CONTINUE READING