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NMR-Based Fragment Screening in a Minimum Sample but Maximum Automation Mode
Published on: June 4, 2021
An NMR strategy for fragment-based ligand screening utilizing a paramagnetic lanthanide probe
Tomohide Saio1, Kenji Ogura, Kazumi Shimizu
1Department of Structural Biology, Faculty of Advanced Life Science, Hokkaido University, N-21, W-11, Sapporo 001-0021, Japan.
Journal of Biomolecular NMR
|September 20, 2011
Summary
This study introduces a novel nuclear magnetic resonance (NMR) method using paramagnetic lanthanide probes for efficient ligand screening and structure determination of protein-ligand complexes. The technique leverages paramagnetic relaxation enhancement (PRE) and pseudo-contact shift (PCS) for broad applicability to non-metal-binding proteins.
Area of Science:
- Biophysics
- Structural Biology
- Chemical Biology
Background:
- Nuclear magnetic resonance (NMR) spectroscopy is a powerful tool for studying molecular interactions.
- Identifying and characterizing protein-ligand interactions is crucial in drug discovery and understanding biological processes.
- Existing methods for ligand screening and structural determination can be limited in scope or efficiency.
Purpose of the Study:
- To develop and validate a novel NMR-based strategy for screening ligands and determining the structure of ligand-protein complexes.
- To utilize paramagnetic lanthanide probes to enhance NMR signals for screening and structural analysis.
- To demonstrate the general applicability of the method to non-metal-binding proteins.
Main Methods:
- Employed a nuclear magnetic resonance (NMR) based approach using a paramagnetic lanthanide probe.
- Utilized a two-point anchored lanthanide-binding peptide tag to attach the lanthanide ion to the target protein.
- Applied paramagnetic relaxation enhancement (PRE) for ligand screening within 30 Å of the lanthanide ion.
- Applied pseudo-contact shift (PCS) for structure determination of the ligand-protein complex, providing distance and angular information up to ~40 Å.
Main Results:
- Successfully screened ligands from a compound library using PRE information.
- Determined the structure of ligand-protein complexes using PCS data.
- Demonstrated the method's effectiveness using the Grb2 Src homology 2 (SH2) domain and its ligands.
- Showcased the strategy's applicability to non-metal-binding proteins.
Conclusions:
- The presented NMR strategy offers a versatile platform for both ligand screening and structural elucidation of protein-ligand complexes.
- The use of paramagnetic lanthanide probes, combined with PRE and PCS, significantly enhances the capabilities of NMR for studying these interactions.
- This method provides a valuable tool for structural biology and drug discovery, particularly for proteins lacking intrinsic metal-binding sites.
