An 15N NMR study of adenine-uracil base pair in a non-aqueous solvent.
M Watanabe, H Iwahashi, H Sugeta, Y Kyogoku, M Kainosho
文献索引:Nucleic Acids Symp. Ser. (6) , s79-82, (1979)
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摘要
[1,3,7,9,10-15N]-2',3',5'-Tri-O-acetyl adenosine (A) and its 8-D and 8-Br derivatives (AD and ABr) were prepared from 95% 15N enriched adenosine obtained from microbial fermentation. The chemical shifts and nuclear Overhauser effects of 15N resonances were measured as a function of the concentration of the mixed 1-cyclohexyluracil. The limiting shift of each 15N resonance was calculated and the structure of the A-U dimer was estimated. From the shifts of 15N-1 and 15N-7 signals it is determined that ABr-U dimers prefer the Watson-Crick type hydrogen bond while the Hoogsteen type pairs are predominant in the A-U dimers.
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1981-07-01
[Eur. J. Biochem. 117(3) , 553-8, (1981)]