Journal
JOURNAL OF INORGANIC BIOCHEMISTRY
Volume 103, Issue 3, Pages 441-447Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jinorgbio.2008.12.010
Keywords
Ruthenium(II) complex; DNA-binding; Photocleavage
Funding
- Scientific Research Foundation of Hunan Provincial Education Department [0813086]
- Scientific Research Foundation of Key Lab of Environment-friendly Chemistry and Application in Ministry of Education (Xiangtan University)
- Doctoral Foundation of Xiangtan University [05QDZ11]
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A new Ru(II) complex [Ru(phen)(2)(mdpz)](2+) (phen = 1,10-phenanthroline, mdpz = 7,7'-methylenedioxyphenyl-dipyrido-[3,2-a:2',3'-c]phonazine) has been synthesized and characterized in detail by elemental analysis, mass spectrometry and H-1 NMR spectroscopy. The interaction of the complex with calf thymus DNA was investigated by spectroscopic and viscosity measurements. The results suggest that the complex binds to DNA via an intercalative mode and serves as a molecular light switch for DNA. Moreover, the complex has been found to promote the photocleavage of plasmid DNA pBR322 under irradiation at 365 nm. The mechanism studies reveal that singlet oxygen (O-1(2)) plays a significant role in the photocleavage. (C) 2008 Elsevier Inc. All rights reserved.
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