Inosine substitutions demonstrate that intramolecular DNA quadruplexes adopt different conformations in the presence of sodium and potassium
Risitano, A. and Fox, K.R. (2005) Inosine substitutions demonstrate that intramolecular DNA quadruplexes adopt different conformations in the presence of sodium and potassium. Bioorganic & Medicinal Chemistry Letters, 15, (8), 2047-2050. (doi:10.1016/j.bmcl.2005.02.050).
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We have examined the stability of fluorescently-labelled oligonucleotides that are based on the human telomeric repeat [(GGGTTA)3GGG], in which one of the guanines in turn is substituted with inosine. We show that the relative stability of the substitutions is different in the presence of sodium and potassium. The data for potassium suggest a parallel arrangement of the strands, while the sodium form is mixed parallel and antiparallel.
The relative stability of intramolecular quadruplexes containing inosine substitutions is different in sodium and potassium.
|Keywords:||G-quartet, quadruplex, fluorescence, molecular beacon, DNA melting, inosine|
|Subjects:||Q Science > Q Science (General)
R Medicine > R Medicine (General)
|Divisions:||University Structure - Pre August 2011 > School of Biological Sciences
|Date Deposited:||06 Aug 2008|
|Last Modified:||12 Jul 2013 01:01|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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