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RNA Structure01:23

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The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
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Updated: Dec 29, 2025

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
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Structure of a Protein-RNA Complex by Solid-State NMR Spectroscopy.

Mumdooh Ahmed1, Alexander Marchanka1, Teresa Carlomagno1,2

  • 1Centre for Biomolecular Drug Research and Institute of Organic Chemistry, Leibniz University Hannover, Schneiderberg 38, 30167, Hannover, Germany.

Angewandte Chemie (International Ed. in English)
|February 6, 2020
PubMed
Summary

Solid-state NMR (ssNMR) now reveals protein-RNA complex structures without crystallization. This method uses paramagnetic relaxation enhancement for atomic-level detail in large, insoluble biomolecular assemblies.

Keywords:
RNA recognitionparamagnetic relaxation enhancementprotein-RNA complexsolid-state NMRstructure determination

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Area of Science:

  • Biochemistry
  • Structural Biology
  • Biophysics

Background:

  • Solid-state NMR (ssNMR) is a powerful technique for determining atomic-resolution structures of proteins.
  • Limitations exist for studying large, insoluble protein assemblies and their interactions.

Purpose of the Study:

  • To develop and validate a novel ssNMR approach for structural determination of protein-RNA complexes (RNPs).
  • To overcome limitations of traditional ssNMR methods for high molecular weight and insoluble complexes.

Main Methods:

  • Utilized paramagnetic relaxation enhancement (PRE) between a protein-bound tag and RNA.
  • Integrated PRE data with chemical-shift perturbation (CSP) data.
  • Determined RNP structure solely from ssNMR data, avoiding heteronuclear magnetization transfer.

Main Results:

  • Successfully yielded an accurate structure of an RNP complex using the proposed ssNMR method.
  • Demonstrated the ability to derive complex structures from component structures.
  • Showcased PRE as a sensitive probe for RNA interactions within RNPs.

Conclusions:

  • The novel ssNMR approach enables structural characterization of challenging protein-RNA complexes.
  • This method is applicable to large, insoluble RNPs not amenable to other structural techniques.
  • Opens new avenues for studying the structure and function of ribonucleoprotein complexes.