Synthesis, characterization and DNA binding properties of oligopyridine-ruthenium(II)-amino acid conjugates.
The DNA-binding properties of a number of ruthenium oligopyridine complexes with conjugated amino acids having the general formulae [Ru(terpy)(4-COY-4'-Mebpy)(X)](n)(+), X=NO (n=3), X=Cl (n=1) and NO(2) (n=1) and Y=AlaCONH(2) and TrpCONH(2) are reported. The new complexes were spectroscopically characterized and their DNA-binding properties were studied by means of circular dichroism (CD), (23)Na and (31)P NMR spectroscopy. The results show that the chlorido complexes interact by coordination to the DNA bases with the conjugated amino acid able to provide an additional interaction with the DNA helix. In addition, electrostatic interactions between all studied complexes and the DNA polyanion were observed. The nitro complexes were found to be insignificant, affecting only the (31)P NMR signal, probably due to changes in the hydration sphere of the DNA close to the phosphates.
Karidi
Konstantina
K
Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, Ioannina 45110, Greece.
Reedijk
Jan
J
Hadjiliadis
Nick
N
Garoufis
Achilleas
A
D000596:Amino Acids / Q000138:chemical synthesis / Q000737:chemistry*; D004247:DNA / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D011725:Pyridines / Q000138:chemical synthesis / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization
D000596:Amino Acids; D011725:Pyridines; D012428:Ruthenium; D004247:DNA