Sensitivity and resolution enhancement of oriented solid-state NMR: Application to membrane proteins

T. Gopinath, Kaustubh R. Mote, Gianluigi Veglia

Research output: Contribution to journalReview articlepeer-review

25 Scopus citations

Abstract

Oriented solid-state NMR (O-ssNMR) spectroscopy is a major technique for the high-resolution analysis of the structure and topology of transmembrane proteins in native-like environments. Unlike magic angle spinning (MAS) techniques, O-ssNMR spectroscopy requires membrane protein preparations that are uniformly oriented (mechanically or magnetically) so that anisotropic NMR parameters, such as dipolar and chemical shift interactions, can be measured to determine structure and orientation of membrane proteins in lipid bilayers. Traditional sample preparations involving mechanically aligned lipids often result in short relaxation times which broaden the 15N resonances and encumber the manipulation of nuclear spin coherences. The introduction of lipid bicelles as membrane mimicking systems has changed this scenario, and the more favorable relaxation properties of membrane protein 15N and 13C resonances make it possible to develop new, more elaborate pulse sequences for higher spectral resolution and sensitivity. Here, we describe our recent progress in the optimization of O-ssNMR pulse sequences. We explain the theory behind these experiments, demonstrate their application to small and medium size proteins, and describe the technical details for setting up these new experiments on the new generation of NMR spectrometers.

Original languageEnglish (US)
Pages (from-to)50-68
Number of pages19
JournalProgress in Nuclear Magnetic Resonance Spectroscopy
Volume75
DOIs
StatePublished - 2013

Bibliographical note

Funding Information:
This work is supported by the National Institute of Health (GM 64742 and 72701 to G.V.).

Keywords

  • Chemical shift anisotropy
  • Dipolar couplings
  • Oriented solid-state NMR
  • Resolution enhancement
  • Sensitivity enhancement

Fingerprint Dive into the research topics of 'Sensitivity and resolution enhancement of oriented solid-state NMR: Application to membrane proteins'. Together they form a unique fingerprint.

Cite this