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High resolution observed in 800 MHz DNP spectra of extremely rigid type III secretion needles.

MPG-Autoren
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Giller,  K.
Department of NMR-Based Structural Biology, MPI for biophysical chemistry, Max Planck Society;

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Becker,  S.
Department of NMR-Based Structural Biology, MPI for biophysical chemistry, Max Planck Society;

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Zitation

Fricke, P., Mance, D., Chevelkov, V., Giller, K., Becker, S., Baldus, M., et al. (2016). High resolution observed in 800 MHz DNP spectra of extremely rigid type III secretion needles. Journal of Biomolecular NMR, 65(3-4), 121-126. doi:10.1007/s10858-016-0044-y.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-002B-B05B-0
Zusammenfassung
The cryogenic temperatures at which dynamic nuclear polarization (DNP) solid-state NMR experiments need to be carried out cause line-broadening, an effect that is especially detrimental for crowded protein spectra. By increasing the magnetic field strength from 600 to 800 MHz, the resolution of DNP spectra of type III secretion needles (T3SS) could be improved by 22 %, indicating that inhomogeneous broadening is not the dominant effect that limits the resolution of T3SS needles under DNP conditions. The outstanding spectral resolution of this system under DNP conditions can be attributed to its low overall flexibility.