The global analysis of DEER data.

The global analysis of DEER data.
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DOI:
10.1016/j.jmr.2012.03.006
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发表时间:
2012-05
期刊:
Journal of magnetic resonance (San Diego, Calif. : 1997)
影响因子:
--
通讯作者:
Hustedt EJ
Hustedt EJ
中科院分区:
其他
文献类型:
--
作者:
Brandon S;Beth AH;Hustedt EJ

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双电子-电子共振(DER)是一种测量生物分子中顺磁中心之间的距离和距离分布的强有力的技术。这些信息可以用来表征生物分子及其大分子组件在功能上相关的结构和动态性质。为了提取距离分布,已开发出分析标准四脉冲鹿实验数据的方法。然而,这些方法通常使用先验基线校正来考虑背景信号。在目前的工作中,描述了一种利用距离分布模型直接对鹿信号进行拟合的方法,该模型允许对拟合参数进行严格的误差分析。此外,这种方法不需要对实验数据进行先验背景校正,并且在必要时可以考虑背景信号上排除的体积效应。文中还展示了对多个鹿数据集的全局分析。全局分析有可能为在广泛的研究中提取距离分布和额外的结构参数提供新的能力。
Double Electron–Electron Resonance (DEER) has emerged as a powerful technique for measuring long range distances and distance distributions between paramagnetic centers in biomolecules. This information can then be used to characterize functionally relevant structural and dynamic properties of biological molecules and their macromolecular assemblies. Approaches have been developed for analyzing experimental data from standard four-pulse DEER experiments to extract distance distributions. However, these methods typically use an a priori baseline correction to account for background signals. In the current work an approach is described for direct fitting of the DEER signal using a model for the distance distribution which permits a rigorous error analysis of the fitting parameters. Moreover, this approach does not require a priori background correction of the experimental data and can take into account excluded volume effects on the background signal when necessary. The global analysis of multiple DEER data sets is also demonstrated. Global analysis has the potential to provide new capabilities for extracting distance distributions and additional structural parameters in a wide range of studies.
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