Paramagnetic relaxation enhancement to improve sensitivity of fast NMR methods: application to intrinsically disordered proteins
 

Paramagnetic relaxation enhancement to improve sensitivity of fast NMR methods: application to intrinsically disordered proteins


Abstract We report enhanced sensitivity NMR measurements of intrinsically disordered proteins in the presence of paramagnetic relaxation enhancement (PRE) agents such as Ni2+-chelated DO2A. In proton-detected 1H-15N SOFAST-HMQC and carbon-detected (H-flip)13CO-15N experiments, faster longitudinal relaxation enables the usage of even shorter interscan delays. This results in higher NMR signal intensities per units of experimental time, without adverse line broadening effects. At 40 mmol·Lâ??1 of the PRE agent, we obtain a 1.7- to 1.9-fold larger signal to noise (S/N) for the respective 2D NMR experiments. High solvent accessibility of intrinsically disordered protein (IDP) residues renders this class of proteins particularly amenable to the outlined approach.

• Content Type Journal Article
• Category Article
• Pages 1-9
• DOI 10.1007/s10858-011-9577-2
• Authors
  • François-Xavier Theillet, Department of NMR-assisted Structural Biology, In-cell NMR Group, Leibniz Institute of Molecular Pharmacology (FMP), Robert-Roessle Str. 10, 13125 Berlin, Germany
  • Andres Binolfi, Department of NMR-assisted Structural Biology, In-cell NMR Group, Leibniz Institute of Molecular Pharmacology (FMP), Robert-Roessle Str. 10, 13125 Berlin, Germany
  • Stamatis Liokatis, Department of NMR-assisted Structural Biology, In-cell NMR Group, Leibniz Institute of Molecular Pharmacology (FMP), Robert-Roessle Str. 10, 13125 Berlin, Germany
  • Silvia Verzini, Department of NMR-assisted Structural Biology, In-cell NMR Group, Leibniz Institute of Molecular Pharmacology (FMP), Robert-Roessle Str. 10, 13125 Berlin, Germany
  • Philipp Selenko, Department of NMR-assisted Structural Biology, In-cell NMR Group, Leibniz Institute of Molecular Pharmacology (FMP), Robert-Roessle Str. 10, 13125 Berlin, Germany

• • Journal Journal of Biomolecular NMR
  • Online ISSN 1573-5001
  • Print ISSN 0925-2738

Source: Journal of Biomolecular NMR