Circular dichroism and conformational polymorphism of DNA.

Circular dichroism and conformational polymorphism of DNA.
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DOI:
10.1093/nar/gkp026
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发表时间:
2009-04
影响因子:
14.9
通讯作者:
Vorlícková M
Vorlícková M
中科院分区:
生物学2区
文献类型:
--
作者:
Kypr J;Kejnovská I;Renciuk D;Vorlícková M

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在这里,我们回顾了研究提供了重要的信息,利用圆二色性(CD)光谱的DNA的构象特性。构象性质包括B族结构、A型、Z型、鸟嘌呤四链体、胞嘧啶四链体、三链体和其他较少表征的结构。CD光谱法是非常敏感和相对便宜的。这种快速简单的方法可以用于低浓度和高浓度的DNA,以及短和长的DNA分子。样品可以很容易地用各种试剂滴定,以引起DNA的构象异构化。检测到的CD光谱变化的过程使得有可能区分单个DNA构象内的逐渐变化和离散结构状态之间的协同异构化。它可以测量特定构象的出现动力学和确定其热力学参数。在仔细的手中,CD光谱是一个有价值的工具,映射特定的DNA分子的构象特性。由于其众多的优点,CD光谱显着参与了所有的基本构象的DNA研究。
Here we review studies that provided important information about conformational properties of DNA using circular dichroic (CD) spectroscopy. The conformational properties include the B-family of structures, A-form, Z-form, guanine quadruplexes, cytosine quadruplexes, triplexes and other less characterized structures. CD spectroscopy is extremely sensitive and relatively inexpensive. This fast and simple method can be used at low- as well as high-DNA concentrations and with short- as well as long-DNA molecules. The samples can easily be titrated with various agents to cause conformational isomerizations of DNA. The course of detected CD spectral changes makes possible to distinguish between gradual changes within a single DNA conformation and cooperative isomerizations between discrete structural states. It enables measuring kinetics of the appearance of particular conformers and determination of their thermodynamic parameters. In careful hands, CD spectroscopy is a valuable tool for mapping conformational properties of particular DNA molecules. Due to its numerous advantages, CD spectroscopy significantly participated in all basic conformational findings on DNA.
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