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Updated: May 23, 2026
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Paramagnetic Relaxation Enhancement for Detecting and Characterizing Self-Associations of Intrinsically Disordered Proteins
Published on: September 23, 2021
Solid-state nuclear magnetic resonance structural studies of proteins using paramagnetic probes.
1Department of Chemistry, The Ohio State University, 100 West 18th Avenue, Columbus, OH 43210, USA. jaroniec@chemistry.ohio-state.edu
Solid State Nuclear Magnetic Resonance
|April 3, 2012
Summary
Magic-angle spinning (MAS) solid-state NMR using paramagnetic probes enables longer distance restraints for protein structure determination. This technique also enhances spectral quality and analysis of biomolecular interactions.
Area of Science:
- Biochemistry
- Biophysics
- Structural Biology
Background:
- Magic-angle spinning (MAS) solid-state NMR is crucial for determining biological macromolecule structures.
- Current limitations include a lack of distance restraints beyond 5 Å, hindering detailed structural analysis.
- Paramagnetic probes offer a potential solution to overcome these limitations.
Purpose of the Study:
- To review the latest applications of MAS solid-state NMR combined with paramagnetic probes for protein structural studies.
- To highlight the utility of paramagnetic restraints for elucidating protein structures and interactions.
- To discuss advancements in spectral acquisition and biomolecular surface characterization.
Main Methods:
- Utilizing uniformly (13)C,(15)N-enriched proteins with paramagnetic centers.
- Measuring site-specific nuclear pseudocontact shifts and spin relaxation enhancements.
- Applying condensed data collection schemes for rapid spectral acquisition.
Main Results:
- Demonstrated measurement of electron-nucleus distances up to approximately 20 Å using paramagnetic centers.
- Enabled the collection of high-resolution, high-sensitivity multidimensional solid-state NMR spectra.
- Facilitated the characterization of solvent-accessible surfaces of peptides and proteins.
Conclusions:
- Paramagnetic probes significantly extend the range of distance restraints in MAS solid-state NMR.
- This approach is valuable for detailed protein structure elucidation and analyzing biomolecular interactions in the solid state.
- Paramagnetic assistance improves NMR data acquisition efficiency and quality for complex biomolecules.
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