Left-handed DNA: from synthetic polymers to chromosomes.

Left-handed DNA: from synthetic polymers to chromosomes.
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左手 DNA:从合成聚合物到染色体。

DOI:
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发表时间:
1983
影响因子:
4.4
通讯作者:
F. Eckstein
F. Eckstein
中科院分区:
生物学3区
文献类型:
--
作者:
T. Jovin;L. McIntosh;D. Arndt;D. Zarling;M. Robert‐Nicoud;J. Van De Sande;K. Jorgenson;F. Eckstein

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DNA 右手 (R) 和左手 (L) 螺旋构象之间的相互转换已通过光谱、电泳、免疫化学和酶技术进行了评估。我们筛选了促进这些转变的盐和溶剂条件,以及特定合成多核苷酸的碱基和主链的某些化学修饰。这些包括主沟和小沟取代基以及所选磷酸二酯键的硫代磷酸酯类似物。我们已经建立了:聚[d(G-C)]中的R-L转变,在胞嘧啶的C5位置处具有碘、溴、甲基和氮杂取代,或者dGpC键的硫代磷酸酯修饰。 [d(A-C).d(G-T)]n 序列家族中的 R-L 转换使用与聚[d(G-C)] 情况相同的修饰聚合物。异构化高度依赖于盐和温度。聚[d(A-T)]的可能的L形式被2-氨基腺嘌呤取代。组成型和兼性 Z-DNA 的免疫原性。不同抗 Z-DNA IgG 对可用多核苷酸探针谱的识别特异性。有些 IgG 具有序列特异性。通过 IgG 稳定其他短暂的左手构象。抗 Z-DNA IgG 与双翅目果蝇、摇蚊和水螅属的酸固定多线染色体结合。激光扫描显微镜显示,酸固定制剂中每 3000-15,000 个碱基对最多结合 1 个 IgG。抗 Z-DNA IgG 与负超螺旋质粒、病毒、噬菌体和重组闭合环状 DNA 结合。从 Z 和 Z*(相关)左手模板转录。根据这些和其他结果,我们提出 Z*-DNA 可能在细胞中具有重要的结构功能作用。
The interconversions between right-handed (R) and left-handed (L) helical conformations of DNA have been assessed by spectroscopic, electrophoretic, immunochemical, and enzymatic techniques. We have screened salt and solvent conditions which facilitate these transitions, as well as certain chemical modifications of the bases and backbone of defined synthetic polynucleotides. These include major and minor groove substituents as well as phosphorothioate analogues of selected phosphodiester bonds. We have established: R-L transitions in poly[d(G-C)] with iodo, bromo, methyl, and aza substitutions at the C5 position of cytosine, or phosphorothioate modification of the dGpC linkage. R-L transitions in the [d(A-C).d(G-T)]n sequence family using polymers modified as in the case of poly[d(G-C)]. The isomerizations are highly salt and temperature dependent. a possible L form of poly[d(A-T)] substituted with 2-amino adenine. the immunogenicities of constitutive and facultative Z-DNAs. the recognition specificities of different anti-Z-DNA IgGs for the spectrum of available polynucleotide probes. Some IgGs are sequence-specific. stabilization by IgG of otherwise transient left-handed conformations. anti-Z-DNA IgG binding to acid-fixed polytene chromosomes from the Diptera Drosophila, Chironomus, and Glyptotendipes. Laser scanning microscopy shows a maximal binding of 1 IgG per 3000-15,000 basepairs in acid fixed preparations. anti-Z-DNA IgG binding to negatively supercoiled plasmid, viral, phage, and recombinant closed circular DNAs. transcription from Z and Z* (associated) left-handed templates. From these and other results we propose that Z*-DNA may have important structural-functional roles in the cell.
酵母染色体末端是否有左手DNA?
DOI: 10.1038/302084a0
发表时间: 1983
期刊: Nature
影响因子: 64.8
作者:
Walmsley,RM;Szostak,JW;Petes,TD
通讯作者: Petes,TD
“Z-DNA”的电子显微镜。
DOI: 10.1101/sqb.1983.047.01.018
发表时间: 1983
期刊: Cold Spring Harbor symposia on quantitative biology
影响因子: --
作者:
Castleman,H;Erlanger,BF
通讯作者: Erlanger,BF
通过 N-2-乙酰氨基芴与鸟嘌呤残基的结合诱导聚 (dG-dC).聚 (dG-dC) 中的 Z 构象。
DOI: 10.1073/pnas.78.3.1451
发表时间: 1981
影响因子: 11.1
作者:
Santella,RM;Grunberger,D;Weinstein,IB;Rich,A
通讯作者: Rich,A
DOI: 10.1073/pnas.78.6.3546
发表时间: 1981-01-01
期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子: --
作者:
LAFER, EM;MOLLER, A;RICH, A
通讯作者: RICH, A
Z-DNA 的抗体识别。
DOI: 10.1101/sqb.1983.047.01.020
发表时间: 1983
期刊: Cold Spring Harbor symposia on quantitative biology
影响因子: --
作者:
Lafer,EM;Möller,A;Valle,RP;Nordheim,A;Rich,A;Stollar,BD
通讯作者: Stollar,BD