期刊
CHEMPHYSCHEM
卷 19, 期 1, 页码 34-39出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.201701238
关键词
exchange parameters; protein dynamics; proton detection; relaxation dispersion; solid-state NMR
资金
- Deutsche Forschungsgemeinschaft [SFB 749]
- Deutsche Forschungsgemeinschaft (Emmy Noether program)
- Verband der Chemischen Industrie (VCI)
- Excellence Cluster CIPSM
- Center for NanoScience (CeNS)
Conformational exchange in proteins is a major determinant in protein functionality. In particular, the s-ms timescale is associated with enzymatic activity and interactions between biological molecules. We show here that a comprehensive data set of R1 relaxation dispersion profiles employing multiple effective fields and tilt angles can be easily obtained in perdeuterated, partly back-exchanged proteins at fast magic-angle spinning and further complemented with chemical-exchange saturation transfer NMR experiments. The approach exploits complementary sources of information and enables the extraction of multiple exchange parameters for s-ms timescale conformational exchange, most notably including the sign of the chemical shift differences between the ground and excited states.
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