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• W2077062496 abstract "The binding of the stereoisomers of [{Ru(Me2bpy)2}2(μ-bpm)]4+, [{Ru(phen)2}2(μ-bpm)]4+ and [{Ru(Me2phen)2}2(μ-bpm)]4+ (Me2bpy = 4,4′-dimethyl-2,2′-bipyridine; bpm = 2,2′-bipyrimidine; phen = 1,10-phenanthroline; Me2phen = 4,7-dimethyl-1,10-phenanthroline) to a tridecanucleotide d(CCGAGAATTCCGG)2 which contains a single adenine bulge site, and four control dodecanucleotides, have been studied using a fluorescence intercalator displacement (FID) assay. The meso isomer of [{Ru(phen)2}2(μ-bpm)]4+ showed the strongest binding to the bulge-containing tridecanucleotide. In order to gain a greater understanding of the basis of the higher affinity exhibited by the meso isomer towards the bulge sequence, a 1H NMR study of the binding of the two enantiomers (ΔΔ and ΛΛ) of rac-[{Ru(phen)2}2(μ-bpm)]4+, and the, meso (ΔΛ) diastereoisomer, to the tridecanucleotide d(CCGAGAATTCCGG)2 was carried out. The NMR results suggest that the meso isomer binds selectively at the bulge site in the tridecanucleotide minor groove, but closer to the 3′-direction and with less structural perturbations of the groove than the ΔΔ and ΛΛ isomers. The results of this study confirm that dinuclear ruthenium complexes have excellent potential as DNA bulge probes, and meso-[{Ru(phen)2}2(μ-bpm)]4+ in particular has a high affinity (1 × 106 M−1) and selectivity for a single adenine bulge site." @default.
• W2077062496 created "2016-06-24" @default.
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• W2077062496 date "2006-02-01" @default.
• W2077062496 modified "2023-10-16" @default.
• W2077062496 title "Meso-[{Ru(phen)2}2(μ-bpm)]4+: A high-affinity DNA bulge probe {bpm=2,2′-bipyrimidine; phen=1,10-phenanthroline}" @default.
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• W2077062496 doi "https://doi.org/10.1016/j.ica.2005.06.036" @default.
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