Journal
JOURNAL OF INORGANIC BIOCHEMISTRY
Volume 107, Issue 1, Pages 104-110Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jinorgbio.2011.10.007
Keywords
Ruthenium; Ferrocene; DNA; RNA; Photocleavage
Funding
- National Natural Science Foundation [21171022, 20971016, 90922004]
- Beijing Natural Science Foundation [2072011]
- Fundamental Research Funds for the Central Universities
- Beijing Normal University
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The interaction of [Ru(bpy)(2)(fiP)1(PF6)(2) {bPy =2,2'-bipyridine, fip=2-ferroceny1-1H-imidazo[4,5-f][1,10]-phenanthroline) with calf thymus DNA and yeast tRNA was investigated comparatively by UV-visible absorption and luminescence spectrophotometric titrations, steady-state emission quenching by [Fe(CN)(6)](4-), ethidium bromide competition experiment, DNA thermal denaturation, viscosity measurements and salt effect studies. The results suggest that the complex binds to the DNA more strongly than to the RNA. The density functional theory calculations were also carried out in order to better understand the nucleic acid binding properties. Agarose gel electrophoresis showed that the complex exhibited enhanced DNA-photocleavage capacity on pUC 18 plasmid DNA under irradiation at 360 nm as compared with a ferrocenyl-free analogous complex. (C) 2011 Elsevier Inc. All rights reserved.
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