Interactions of quinoxaline antibiotic and DNA: the molecular structure of a triostin A-d(GCGTACGC) complex.
Interactions of quinoxaline antibiotic and DNA: the molecular structure of a triostin A-d(GCGTACGC) complex.
复制标题
喹喔啉抗生素与 DNA 的相互作用:triostin A-d (GCGTACGC) 复合物的分子结构。
DOI:
10.1080/07391102.1986.10506353
复制
发表时间:
1986
影响因子:
4.4
通讯作者:
A. Rich
中科院分区:
文献类型:
--
作者:
A. Wang;G. Ughetto;G. Quigley;A. Rich
The crystal structure of a DNA octamer d(GCGTACGC) complexed to an antitumor antibiotic, triostin A, has been solved and refined to 2.2 A resolution by x-ray diffraction analysis. The antibiotic molecule acts as a true bis intercalator surrounding the d(CpG) sequence at either end of the unwound right-handed DNA double helix. As previously observed in the structure of triostin A-d(CGTACG) complex (A.H.-J. Wang, et. al., Science, 225, 1115-1121 (1984)), the alanine amino acid residues of the drug molecule form sequence-specific hydrogen bonds to guanines in the minor groove. The two central A.T base pairs are in Hoogsteen configuration with adenine in the syn conformation. In addition, the two terminal G.C base pairs flanking the quinoxaline rings are also held together by Hoogsteen base pairing. This is the first observation in an oligonucleotide of. Hoogsteen G.C base pairs where the cytosine is protonated. The principal functional components of a bis-intercalative compound are discussed.
DOI:
10.1073/pnas.83.17.6402
发表时间:
1986
影响因子:
11.1
作者:
Singh,UC;Pattabiraman,N;Langridge,R;Kollman,PA
通讯作者:
Kollman,PA