2. Academic Validation
  3. Anthraquinones quinizarin and danthron unwind negatively supercoiled DNA and lengthen linear DNA

Anthraquinones quinizarin and danthron unwind negatively supercoiled DNA and lengthen linear DNA

  • Biochem Biophys Res Commun. 2014 Jan 31;444(1):50-5. doi: 10.1016/j.bbrc.2014.01.007.
Valéria Verebová 1,  Jozef Adamcik 2,  Patrik Danko 3,  Dušan Podhradský 3,  Pavol Miškovský 4,  Jana Staničová 5
Affiliations

Affiliations

  • 1 Institute of Biophysics, University of Veterinary Medicine and Pharmacy, Komenského 73, 041 81 Košice, Slovakia.
  • 2 Food and Soft Materials Science, Institute of Food, Nutrition & Health, ETH Zurich, Schmelzbergstrasse 9, CH-8092 Zürich, Switzerland.
  • 3 Department of Biochemistry, Institute of Chemistry, Faculty of Sciences, P.J. Šafárik University, Moyzesova 11, 041 54 Košice, Slovakia.
  • 4 Department of Biophysics, Faculty of Sciences, P.J. Šafárik University, Jesenná 5, 041 54 Košice, Slovakia; Center for Interdisciplinary Biosciences, Faculty of Sciences, P.J. Šafárik University, Jesenná 5, 041 54 Košice, Slovakia.
  • 5 Institute of Biophysics, University of Veterinary Medicine and Pharmacy, Komenského 73, 041 81 Košice, Slovakia. Electronic address: [email protected].
PMID: 24434150 DOI: 10.1016/j.bbrc.2014.01.007
Abstract

The intercalating drugs possess a planar aromatic chromophore unit by which they insert between DNA bases causing the distortion of classical B-DNA form. The planar tricyclic structure of Anthraquinones belongs to the group of chromophore units and enables Anthraquinones to bind to DNA by intercalating mode. The interactions of simple derivatives of anthraquinone, quinizarin (1,4-dihydroxyanthraquinone) and danthron (1,8-dihydroxyanthraquinone), with negatively supercoiled and linear DNA were investigated using a combination of the electrophoretic methods, fluorescence spectrophotometry and single molecule technique an atomic force microscopy. The detection of the topological change of negatively supercoiled plasmid DNA, unwinding of negatively supercoiled DNA, corresponding to appearance of DNA topoisomers with the low superhelicity and an increase of the contour length of linear DNA in the presence of quinizarin and danthron indicate the binding of both Anthraquinones to DNA by intercalating mode.

Keywords

DNA lengthening; Danthron; Intercalation; Negatively supercoiled DNA; Quinizarin.

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