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Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
Published on: September 17, 2017
Supramolecular protein structure determination by site-specific long-range intermolecular solid state NMR
Andrew J Nieuwkoop1, Chad M Rienstra
1Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, USA.
Journal of the American Chemical Society
|May 15, 2010
Summary
Three-dimensional (3D) Z-filtered Transverse Enables Distance measurements (TEDOR) experiments provide site-specific distance restraints for protein interfaces. This method enables accurate structure calculations for protein assemblies, including fibrils.
Area of Science:
- Structural biology
- Biophysics
- Nuclear Magnetic Resonance (NMR) spectroscopy
Background:
- Determining the precise arrangement of proteins in complexes and fibrils is crucial for understanding their function.
- Traditional methods like X-ray diffraction are not always applicable to protein fibrils.
- Site-specific distance restraints are essential for accurate structural modeling.
Purpose of the Study:
- To demonstrate the utility of 3D Z-filtered TEDOR experiments for obtaining intermolecular distance restraints in protein samples.
- To apply this method for calculating the structure of protein interfaces.
- To validate the approach by comparing results with existing structural data.
Main Methods:
- Utilizing 3D Z-filtered TEDOR experiments on isotopically labeled protein mixtures.
- Performing rigorous structure calculations using the obtained distance restraints.
- Comparing the determined structure with X-ray diffraction data for nanocrystalline GB1.
Main Results:
- 3D Z-filtered TEDOR experiments successfully yielded site-specific intermolecular distance restraints.
- The packing arrangement of nanocrystalline GB1 was determined to be consistent with the trigonal form.
- The study provides a proof of principle for applying this NMR technique to complex protein structures.
Conclusions:
- 3D Z-filtered TEDOR is a powerful tool for determining protein interface structures.
- This method offers a viable alternative for structural studies of protein fibrils where diffraction methods fail.
- The technique has significant potential for advancing the structural analysis of protein assemblies.
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