Specific Signal Enhancement on an RNA-Protein Interface by Dynamic Nuclear Polarization

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Victoria Aladin
  • Arun K. Sreemantula
  • Thomas Biedenbänder
  • Alexander Marchanka
  • Björn Corzilius

External Research Organisations

  • University of Rostock
  • European Molecular Biology Laboratory
  • Leibniz Institute for Catalysis at the University of Rostock (LIKAT)
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Details

Original languageEnglish
Article numbere202203443
JournalChemistry - a European journal
Volume29
Issue number16
Early online date19 Dec 2022
Publication statusPublished - 16 Mar 2023

Abstract

Sensitivity and specificity are both crucial for the efficient solid-state NMR structure determination of large biomolecules. We present an approach that features both advantages by site-specific enhancement of NMR spectroscopic signals from the protein-RNA binding site within a ribonucleoprotein (RNP) by dynamic nuclear polarization (DNP). This approach uses modern biochemical techniques for sparse isotope labeling and exploits the molecular dynamics of 13C-labeled methyl groups exclusively present in the protein. These dynamics drive heteronuclear cross relaxation and thus allow specific hyperpolarization transfer across the biomolecular complex's interface. For the example of the L7Ae protein in complex with a 26mer guide RNA minimal construct from the box C/D complex in archaea, we demonstrate that a single methyl-nucleotide contact is responsible for most of the polarization transfer to the RNA, and that this specific transfer can be used to boost both NMR spectral sensitivity and specificity by DNP.

Keywords

    dynamic nuclear polarization, isotopic labeling, NMR spectroscopy, proteins, RNA

ASJC Scopus subject areas

Cite this

Specific Signal Enhancement on an RNA-Protein Interface by Dynamic Nuclear Polarization. / Aladin, Victoria; Sreemantula, Arun K.; Biedenbänder, Thomas et al.
In: Chemistry - a European journal, Vol. 29, No. 16, e202203443, 16.03.2023.

Research output: Contribution to journalArticleResearchpeer review

Aladin, V, Sreemantula, AK, Biedenbänder, T, Marchanka, A & Corzilius, B 2023, 'Specific Signal Enhancement on an RNA-Protein Interface by Dynamic Nuclear Polarization', Chemistry - a European journal, vol. 29, no. 16, e202203443. https://doi.org/10.1002/chem.202203443
Aladin, V., Sreemantula, A. K., Biedenbänder, T., Marchanka, A., & Corzilius, B. (2023). Specific Signal Enhancement on an RNA-Protein Interface by Dynamic Nuclear Polarization. Chemistry - a European journal, 29(16), Article e202203443. https://doi.org/10.1002/chem.202203443
Aladin V, Sreemantula AK, Biedenbänder T, Marchanka A, Corzilius B. Specific Signal Enhancement on an RNA-Protein Interface by Dynamic Nuclear Polarization. Chemistry - a European journal. 2023 Mar 16;29(16):e202203443. Epub 2022 Dec 19. doi: 10.1002/chem.202203443
Aladin, Victoria ; Sreemantula, Arun K. ; Biedenbänder, Thomas et al. / Specific Signal Enhancement on an RNA-Protein Interface by Dynamic Nuclear Polarization. In: Chemistry - a European journal. 2023 ; Vol. 29, No. 16.
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