Rapid proton-detected NMR assignment for proteins with fast magic angle spinning

J Am Chem Soc. 2014 Sep 3;136(35):12489-97. doi: 10.1021/ja507382j. Epub 2014 Aug 18.

Abstract

Using a set of six (1)H-detected triple-resonance NMR experiments, we establish a method for sequence-specific backbone resonance assignment of magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectra of 5-30 kDa proteins. The approach relies on perdeuteration, amide (2)H/(1)H exchange, high magnetic fields, and high-spinning frequencies (ωr/2π ≥ 60 kHz) and yields high-quality NMR data, enabling the use of automated analysis. The method is validated with five examples of proteins in different condensed states, including two microcrystalline proteins, a sedimented virus capsid, and two membrane-embedded systems. In comparison to contemporary (13)C/(15)N-based methods, this approach facilitates and accelerates the MAS NMR assignment process, shortening the spectral acquisition times and enabling the use of unsupervised state-of-the-art computational data analysis protocols originally developed for solution NMR.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Carbon Isotopes / analysis
  • Deuterium Exchange Measurement
  • Hydrogen / analysis*
  • Models, Molecular
  • Nitrogen Isotopes / analysis
  • Nuclear Magnetic Resonance, Biomolecular / methods*
  • Proteins / chemistry
  • Protons*

Substances

  • Carbon Isotopes
  • Nitrogen Isotopes
  • Proteins
  • Protons
  • Hydrogen