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Updated: Jun 4, 2026

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy

Published on: September 17, 2017

Sparsely sampled high-resolution 4-D experiments for efficient backbone resonance assignment of disordered proteins.

Jie Wen¹, Jihui Wu, Pei Zhou

¹Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, PR China.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)

|February 1, 2011

Summary

Intrinsically disordered proteins (IDPs) require specific NMR experiments for backbone assignment. This study introduces new 4-D experiments to efficiently collect complete resonance data for IDPs.

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Last Updated: Jun 4, 2026

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy

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Published on: September 17, 2017

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Published on: April 28, 2022

Area of Science:

Biochemistry
Structural Biology
Nuclear Magnetic Resonance (NMR) Spectroscopy

Background:

Intrinsically disordered proteins (IDPs) are crucial for cellular functions but challenging to study.
Standard NMR methods often lack sufficient resonance connectivity for IDP backbone assignment due to limited chemical shift dispersion.
Existing 4-D triple-resonance experiments have overlapping evolution periods, hindering optimal data collection.

Purpose of the Study:

To develop novel 4-D triple-resonance NMR experiments for comprehensive backbone resonance assignment in IDPs.
To overcome limitations of conventional experiments in acquiring non-redundant data for IDPs.
To improve the efficiency and accuracy of structural analysis for intrinsically disordered proteins.

Main Methods:

Proposal of a new pair of 4-D triple-resonance experiments: HA(CA)CO(CA)NH/HA(CA)CONH.
Utilizing alternative chemical shift evolution schemes to complement existing 4-D HNCACB/HN(CO)CACB experiments.
Employing sparse sampling and Fast Fourier Transform with CLEAN (FFT-CLEAN) processing for spectral reconstruction.

Main Results:

The proposed experiments provide a complete set of backbone resonance information for IDPs.
High-resolution 4-D spectra were acquired efficiently, enabling assignment of backbone resonances.
FFT-CLEAN processing significantly reduced dependence on sampling schemes, yielding high-quality spectra even with suboptimal sampling.

Conclusions:

The novel 4-D NMR experiments offer an optimal solution for backbone assignment of IDPs.
Sparse sampling combined with FFT-CLEAN processing enhances spectral quality and assignment efficiency.
This approach facilitates detailed structural and functional studies of intrinsically disordered proteins.