• Methods Mol. Biol. · Jan 2011

    G-quadruplex structures and G-quadruplex-interactive compounds.

    • Raveendra I Mathad and Danzhou Yang.
    • Department of Chemistry, BIO5 Institute, College of Pharmacy, The University of Arizona, Tucson, AZ, USA.
    • Methods Mol. Biol. 2011 Jan 1; 735: 77-96.

    AbstractG-quadruplexes are noncanonical secondary structures formed in DNA sequences containing consecutive runs of guanines. DNA G-quadruplexes have recently emerged as attractive cancer therapeutic targets. It has been shown that the 3' G-rich single-stranded overhangs of human telomeres can form G-quadruplex structures. G-quadruplex-interactive compounds have been shown to inhibit telomerase access as well as telomere capping. Nuclear magnetic resonance (NMR) spectroscopy has been shown to be a powerful method in determining the G-quadruplex structures under physiologically relevant conditions. We present the NMR methodology used in our research group for structure determination of G-quadruplexes in solution and their interactions with small molecule compounds. An example of a G-quadruplex structure formed in the human telomere sequence recently solved in our laboratory is used as an example.

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