Site‐directed Spin Labeling and Pulse Dipolar Electron Paramagnetic Resonance
Site‐directed Spin Labeling and Pulse Dipolar Electron Paramagnetic Resonance
复制标题
定点自旋标记和脉冲偶极电子顺磁共振
DOI:
10.1002/9780470027318.a9024
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发表时间:
2010
期刊:
影响因子:
9.7
通讯作者:
H. Steinhoff
中科院分区:
文献类型:
--
作者:
J. Klare;H. Steinhoff
Structural and functional investigations on biomolecules often rely on the availability of topological information, either to allow building structural models or to characterize conformational changes of these molecules or complexes thereof during function. Site-directed spin labeling (SDSL) in combination with EPR spectroscopy became a very powerful tool to obtain intra- and inter-molecular distance constraints, as the accessible distances span the interesting range from 0.5–8 nm, crystallization is not required, and the size of the system under investigation is not limited. Especially the development of pulse dipolar EPR methods, in particular double electron–electron resonance (DEER) spectroscopy with its ability to provide interspin distance distributions in the 2–8 nm range, greatly increased the applicability of electron paramagnetic resonance (EPR) spectroscopy for studies on biological systems. This article is intended to give an introduction into SDSL and dipolar EPR. The first part summarizes the state-of-the-art in SDSL, providing an overview of methodologies currently available or under development. In the second part, the technique of DEER spectroscopy is introduced, covering the basic theoretical background as well as selected practical aspects of data acquisition and analysis. Finally, selected examples for the application of SDSL-DEER from the recent literature are summarized.
Keywords:
site-directed spin labeling;
SDSL;
electron paramagnetic resonance;
EPR;
pulse EPR;
double electron–electron resonance;
DEER;
pulse double electron resonance;
PELDOR;
distance determination;
spin label;
MTSSL;
four-pulse DEER
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