title: Structure of mutagen nucleic acid complexes in solution. Proton chemical shifts in 9-aminoacridine complexes with dG-dC, dC-dG, and dA-dT-dG-dC-dA-dT.
abstract: The influence of self-complementary oligodeoxynucleotides on the chemical shifts of protons of the mutagenic acridine dye 9-aminoacridine has been measured. Upfield shifts indicative of intercalative binding are found in the cases of dG-dC, dC-dG, and dA-dT-dG-dC-dA-dT but not in dA-dT. Geometries for the complexes that are compatibile with the chemical-shift data and the X-ray structure of the complex between ri5C-rG and 9-aminoacridine determined by Sakore et al. [Sakore, T.D., Jain, S.C., Tsai, C., and Sobell, H.M. (1977), Proc. Natl. Acad. Sci. U.S.A. 74, 188--192] can be identified using recent theoretical estimates of shifts induced by nucleotide bases.
mesh_terms: D000166:Acridines; D007700:Kinetics; D009682:Magnetic Resonance Spectroscopy; D009153:Mutagens; D009690:Nucleic Acid Conformation; D009838:Oligodeoxyribonucleotides; D009841:Oligonucleotides; D013329:Structure-Activity Relationship
chemical_list: D000166:Acridines; D009153:Mutagens; D009838:Oligodeoxyribonucleotides; D009841:Oligonucleotides