Non-Watson-Crick G.C and A.T base pairs in a DNA-antibiotic complex.
Non-Watson-Crick G.C and A.T base pairs in a DNA-antibiotic complex.
复制标题
DNA-抗生素复合物中的非 Watson-Crick G.C 和 A.T 碱基对。
DOI:
10.1126/science.3704650
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发表时间:
1986
期刊:
影响因子:
56.9
通讯作者:
Alexander Rich
中科院分区:
文献类型:
--
作者:
G. Quigley;G. Ughetto;G. A. Marel;J. H. Boom;Andrew H.‐J. Wang;Alexander Rich
The structure of a DNA octamer d(GCGTACGC) cocrystallized with the bisintercalator antibiotic triostin A has been solved. The DNA forms an unwound right-handed double helix. Four base pairs are of the Watson-Crick type while four are Hoogsteen base pairs, including two A.T and two G.C base pairs. This is the first observation in an oligonucleotide of Hoogsteen G.C base pairs where the cystosine is protonated. It is likely that these also occur in solutions of DNA complexed to this antibiotic.