The reaction of anthramycin with DNA. Proton and carbon nuclear magnetic resonance studies on the structure of the anthramycin-DNA adduct.
Nuclear magnetic resonance techniques are used to confirm the points of attachment of anthramycin to DNA. Using 13C NMR spectroscopy, the C-11 resonance of anthramycin is shown to undergo a 16-ppm upfield shift upon formation of a covalent bond with DNA, indicative of an aminal linkage at that position. The site of attachment on the DNA is determined using the self-complementary oligodeoxyribonucleotide d-(ApTpGpCpApT) as a DNA model. Proton NMR, both in H2O and D2O solutions, provides a direct characterization of the anthramycin-oligonucleotide adduct. Upon covalent attachment to the duplex, a loss in the helical symmetry is observed, resulting in a doubling of several of the oligonucleotide resonances. Examination of the data confirms that the point of attachment of the anthramycin to the d-(ApTpGpCpApT) is at the guanine-NH2-position, consistent with the model proposed by Hurley and Petrusek (Hurley, L. H., and Petrusek, R. L. (1979) Nature (Lond.) 282, 529-531) and Petrusek et al. (Petrusek, R. L., Anderson, G. L., Garner, T. F., Fannin, Q. L., Kaplan, D. J., Zimmer, S. G., and Hurley, L. H. (1981) Biochemistry 20, 1111-1119).
D000818:Animals; D000876:Anthramycin; D001570:Benzodiazepinones; D002417:Cattle; D055598:Chemical Phenomena; D002621:Chemistry; D004247:DNA; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D009690:Nucleic Acid Conformation; D009838:Oligodeoxyribonucleotides; D009841:Oligonucleotides; D013056:Spectrophotometry, Ultraviolet; D013816:Thermodynamics; D013950:Thymus Gland
D001570:Benzodiazepinones; D009838:Oligodeoxyribonucleotides; D009841:Oligonucleotides; D000876:Anthramycin; D004247:DNA