Open AccessSubstituted Naphthalenediimide Compounds Bind Selectively to Two Human Quadruplex Structures with Parallel Topology
Author(s) -
Thi-Dieu-Hien Vo,
Sally Oxenford,
Richard Angell,
Chiara Marchetti,
Stephan A. Ohnmacht,
A. Paul,
Stephen Neidle
Publication year - 2020
Publication title -
acs medicinal chemistry letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.065
H-Index - 66
ISSN - 1948-5875
DOI - 10.1021/acsmedchemlett.0c00041
Subject(s) - g quadruplex , surface plasmon resonance , dna , duplex (building) , telomerase , dissociation constant , chemistry , rna , dissociation (chemistry) , molecular model , telomere , biophysics , stereochemistry , topology (electrical circuits) , combinatorial chemistry , gene , biochemistry , biology , nanotechnology , materials science , nanoparticle , organic chemistry , receptor , mathematics , combinatorics
Interactions are reported of three representative naphthalenediimide derivatives with three quadruplex targets, from the promoter region of the telomerase (hTERT) gene, a human telomeric DNA quadruplex, and a telomeric RNA quadruplex (TERRA). Thermal melting studies showed that these compounds strongly stabilize the quadruplexes, with weak stabilization of a duplex DNA. Binding studies by surface plasmon resonance and fluorescence spectroscopy found that the compounds bind to the quadruplexes with nanomolar equilibrium dissociation constants. Plausible topologies for the quadruplex complexes were deduced from CD spectra, which together with the surface plasmon resonance data indicate that the quadruplexes with parallel quadruplex folds are preferred by two compounds, which was confirmed by qualitative molecular modeling.