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
A. Rich
中科院分区:
生物学3区
文献类型:
--
作者:
A. Wang;G. Ughetto;G. Quigley;A. Rich

文献摘要

参考文献

被引文献

相似文献

用X-射线衍射分析方法测定了与抗肿瘤抗生素Triostin A复合的DNA八聚体d(GCGTACGC)的晶体结构,并将其分辨率提高到2.2 A。抗生素分子作为一个真正的双嵌入剂围绕d(CpG)序列在解开的右手DNA双螺旋的两端。如先前在曲骨菌素A-d(CGTACG)复合物(A.H.- J. Wang,et.例如,Science,225,1115-1121(1984)),药物分子的丙氨酸氨基酸残基与小沟中的鸟嘌呤形成序列特异性氢键。两个中心A.T碱基对呈Hoogsteen构型,腺嘌呤呈顺式构象。此外,喹喔啉环侧翼的两个末端G. C碱基对也通过Hoogsteen碱基配对保持在一起。这是在寡核苷酸中的第一次观察。Hoogsteen G. C碱基对,其中胞嘧啶被质子化。讨论了双插层化合物的主要功能组分。
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.
d(CGTACG)2 的分子力学研究:triostin A 与 Hoogsteen 或 Watson-Crick 配对中的中间 A - T 碱基对的复合物。
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