Fragment-based screening by protein-detected NMR spectroscopy

Area of Science:

• Biochemistry
• Chemical Biology
• Drug Discovery

Background:

• Fragment-based drug discovery (FBDD) identifies small molecules for high-affinity ligands.
• Screening fragment libraries (<10,000 molecules) reveals novel binding sites and scaffolds.
• A robust FBDD pipeline requires standardized protocols for target selection, screening, and validation.

Purpose of the Study:

• To detail a comprehensive fragment screening pipeline for FBDD.
• To focus on protein-detected NMR data collection and analysis as a key resource.
• To provide researchers with a standardized protocol for FBDD projects.

Main Methods:

• Rigorous NMR-based stability and buffer testing for selected protein targets.
• Computational and physical analysis, proper storage, and multiplexing of fragment libraries.
• Streamlined screening using liquid handling robotics and custom Python scripts for NMR data analysis.
• Hit validation through titration for binding site and K_d determination, confirmed by orthogonal assays.

Main Results:

• The developed FBDD pipeline successfully screened diverse target proteins.
• Novel molecules selectively binding to target proteins were identified.
• The pipeline ensures hit integrity through standardized protocols and validation methods.

Conclusions:

• A detailed FBDD screening pipeline, emphasizing NMR, is crucial for identifying novel drug leads.
• Standardized protocols and advanced analytical methods enhance the efficiency and success of FBDD.
• This resource facilitates the development of high-affinity and selective ligands for therapeutic targets.