Journal of Biomolecular NMR

, Volume 66, Issue 4, pp 233–242

Accelerating proton spin diffusion in perdeuterated proteins at 100 kHz MAS

  • Johannes J. Wittmann
  • Vipin Agarwal
  • Johannes Hellwagner
  • Alons Lends
  • Riccardo Cadalbert
  • Beat H. Meier
  • Matthias Ernst
Article

DOI: 10.1007/s10858-016-0071-8

Cite this article as:
Wittmann, J.J., Agarwal, V., Hellwagner, J. et al. J Biomol NMR (2016) 66: 233. doi:10.1007/s10858-016-0071-8

Abstract

Fast magic-angle spinning (>60 kHz) has many advantages but makes spin-diffusion-type proton–proton long-range polarization transfer inefficient and highly dependent on chemical-shift offset. Using 100%-HN-[2H,13C,15N]-ubiquitin as a model substance, we quantify the influence of the chemical-shift difference on the spin diffusion between proton spins and compare two experiments which lead to an improved chemical-shift compensation of the transfer: rotating-frame spin diffusion and a new experiment, reverse amplitude-modulated MIRROR. Both approaches enable broadband spin diffusion, but the application of the first variant is limited due to fast spin relaxation in the rotating frame. The reverse MIRROR experiment, in contrast, is a promising candidate for the determination of structurally relevant distance restraints. The applied tailored rf-irradiation schemes allow full control over the range of recoupled chemical shifts and efficiently drive spin diffusion. Here, the relevant relaxation time is the larger longitudinal relaxation time, which leads to a higher signal-to-noise ratio in the spectra.

Keywords

Fast MAS Protein structure determination Spin diffusion 

Supplementary material

10858_2016_71_MOESM1_ESM.pdf (3.6 mb)
Supplementary material 1 (PDF 3644 kb)

Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  1. 1.Physical ChemistryETH ZurichZurichSwitzerland
  2. 2.TIFR Center for Interdisciplinary ScienceHyderabadIndia