Biopolym. Cell. 2000; 16(1):75-81.
Interaction of cyanlne dyes with nucleic acids. 9. The study of spectral properties of cyanine dyes-DNA complexes in the presence of organic solvents
1Losytskyy M. Yu., 1Kovalska V. B., 1Yarmoluk S. M.
  1. Institute of Molecular Biology and Genetics, NAS of Ukraine
    150, Akademika Zabolotnoho Str., Kyiv, Ukraine, 03680


The influence of medium polarity on spectral-luminescent properties of monomethyne cyanine dyes and their DNA-complexes has been studied in the presented work. The presence of organic solvent in aqueous dye and DNA-dye solutions resulted in significant decrease of DNA-dye complex fluorescence and increase of fluorescent intensity of free dyes. The fluorescence intensity of DNA-Ethidium bromide complexes depends weekly on the nature of the organic solvent. This result can be explained using the intercalary ion interaction model But for the cyanine dyes, have been studied, this dependence is much stronger. So, the considerable contact to the medium of the cyanine dyes bound to DNA has been shown to exist. Nevertheless, the interaction of these dyes with DNA showed no reference to the AT-sequences. So, in this presentation work we assume the studied cyanine dyes to interact with the DNA according to «half-intercalation» mechanism.


[1] Rye HS, Yue S, Wemmer DE, Quesada MA, Haugland RP, Mathies RA, Glazer AN. Stable fluorescent complexes of double-stranded DNA with bis-intercalating asymmetric cyanine dyes: properties and applications. Nucleic Acids Res. 1992;20(11):2803-12.
[2] Skeidsvoll J, Ueland PM. Analysis of double-stranded DNA by capillary electrophoresis with laser-induced fluorescence detection using the monomeric dye SYBR green I. Anal Biochem. 1995;231(2):359-65.
[3] Suzuki T, Fujikura K, Higashiyama T, Takata K. DNA staining for fluorescence and laser confocal microscopy. J Histochem Cytochem. 1997;45(1):49-53.
[4] Ishchenko AA. Structure and spectral-luminescent properties of polymethyne cyanine dyes. Kyiv: Nauk. dumka 1994.170 p.
[5] Yarmoluk SM, Kovalska VB, Kovtun YuP. Interaction of cyanine dyes with nucleic acids. 5. Towards model of «half intercalation of monomethyne cyanine dyes into double-stranded nucleic acids. Biopolym Cell. 1999; 15(1):75-82.
[6] Long EC, Barton JK. On demonstrating DNA intercalation. Acc Chem Res. 1990;23(9):271–3.
[7] Jacobsen JP, Pedersen JB, Hansen LF, Wemmer DE. Site selective bis-intercalation of a homodimeric thiazole orange dye in DNA oligonucleotides. Nucleic Acids Res. 1995;23(5):753-60.
[8] Rye HS, Glazer AN. Interaction of dimeric intercalating dyes with single-stranded DNA. Nucleic Acids Res. 1995;23(7):1215-22.
[9] Yarmoluk SM, Kovalska VB, Smirnova TV, Shandura MP, Kovtun YP, Matsuka GKh. Interaction of cyanine dyes with nucleic acids. 2. Spectroscopic properties of methyleneoxy analogues of Thiazole Orange. Biopolym Cell. 1996; 12(6):74-81.
[10] Yarmoluk SM, Zhyvoloup AN, Koval'ska VB, Klimenko IV, Kukharenko AP, Kovtun YP, Slominsky YL. Interaction of cyanine dyes with nucleic acids. I. Studies on monomethyne cyanine dyes as possible fluorescent probes for the detection of nucleic acids. Biopolym Cell. 1996; 12(1):69-74.
[11] Lee LG, Chen CH, Chiu LA. Thiazole orange: a new dye for reticulocyte analysis. Cytometry. 1986;7(6):508-17.
[12] Waring M. Variation of the supercoils in closed circular DNA by binding of antibiotics and drugs: evidence for molecular models involving intercalation. J Mol Biol. 1970;54(2):247-79.
[13] Neidle S. DNA structure and recognition. Ed. D. Reec-wood. New York: Oxford University press, 1994. 108 p.