UNIT 17.4 Analysis of Multidimensional G-Quadruplex Melting Curves

  1. Robert D. Gray,
  2. Jonathan B. Chaires

Published Online: 1 JUN 2011

DOI: 10.1002/0471142700.nc1704s45

Current Protocols in Nucleic Acid Chemistry

Current Protocols in Nucleic Acid Chemistry

How to Cite

Gray, R. D. and Chaires, J. B. 2011. Analysis of Multidimensional G-Quadruplex Melting Curves. Current Protocols in Nucleic Acid Chemistry. 45:17.4:17.4.1–17.4.16.

Author Information

  1. James Graham Brown Cancer Center, University of Louisville, Louisville, Kentucky

Publication History

  1. Published Online: 1 JUN 2011
  2. Published Print: JUN 2011


Multidimensional “3D” melting curves for G-quadruplexes are obtained by recording whole spectra (absorbance, CD, fluorescence) as a function of temperature, rather than the common approach of recording the spectral response to temperature at a single wavelength. 3D melting curves are richer in information, and can be used to enumerate the number of significant species and intermediate states required to properly analyze the thermal denaturation reaction to obtain thermodynamic information. This unit describes the application of the method of singular value decomposition to the analysis of 3D melting data obtained for G-quadruplex structures, and how the results of such an analysis can be used to provide a more complete characterization of the mechanism of quadruplex unfolding. Curr. Protoc. Nucleic Acid Chem. 45:17.4.1-17.4.16. © 2011 by John Wiley & Sons, Inc.


  • G-quadruplex;
  • thermodynamics;
  • spectroscopy;
  • thermal melting;
  • singular value decomposition