Related Experiment Video
Updated: Jan 16, 2026
14:55
Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
Published on: September 17, 2017
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Residue-Resolved Liquid-State Hyperpolarized NMR of Peptide Condensate Surfaces
Dörte Brandis1,2, Ertan Turhan1, Milan Zachrdla1
1Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, 1090 Vienna, Austria.
Journal of the American Chemical Society
|September 25, 2025
Summary
Hyperpolarized surface-specific Nuclear Magnetic Resonance (NMR) spectroscopy reveals the surface composition of biomolecular condensates. This technique enhances sensitivity, showing glycine-rich surfaces in elastin-like polypeptide complexes.
Area of Science:
- Biophysics
- Biochemistry
- Materials Science
Background:
- Biomolecular condensates require atomic-level surface insights for understanding environmental interactions.
- Conventional Nuclear Magnetic Resonance (NMR) spectroscopy lacks sensitivity for probing sparse surface residues in large peptide systems.
Purpose of the Study:
- To introduce a novel technique for visualizing solvent-accessible residues in large biomolecular condensates.
- To overcome the sensitivity limitations of conventional NMR for surface analysis.
Main Methods:
- Development and application of hyperpolarized liquid-state surface-specific NMR spectroscopy.
- Utilizing unconventional sample handling and hyperpolarization-specific data processing.
- Targeting elastin-like polypeptide (ELP) nanoscale complexes.
Main Results:
- Achieved high-resolution hyperpolarized surface NMR spectra with significantly boosted sensitivity (up to 2 orders of magnitude).
- Demonstrated residue-resolved detection of the water interface in mega Dalton-sized ELP condensates.
- Revealed glycine residue segregation at the coacervate surface, with suppressed hydrophobic core residues.
Conclusions:
- The new technique provides atomic-level insights into the surface architecture of biomolecular condensates like ELPs.
- Offers a solution-state analog to surface-enhanced solid-state NMR for soft-matter interfaces.
- Enables detailed investigations of protein condensates, synthetic coacervates, and bioengineered materials.
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