1D and 2D NMR for KRAS:Ligand Binding

Area of Science:

• Biochemistry
• Structural Biology
• Drug Discovery

Background:

• Fragment-based screening and binding interface mapping are crucial in drug discovery.
• Nuclear Magnetic Resonance (NMR) spectroscopy offers powerful tools for analyzing molecular interactions.

Purpose of the Study:

• To apply ligand-observed 1D NMR and protein-observed 2D NMR for fragment screening.
• To map binding interfaces of small molecules to oncogenic KRAS mutants.

Main Methods:

• Utilized 1D NMR for fragment screening and affinity assessment.
• Employed 2D NMR for binding interface mapping and protein analysis.
• Investigated both active (GMPPNP-bound) and inactive (GDP-bound) states of KRAS.

Main Results:

• Demonstrated the capability of NMR methods to detect compound binding across a wide affinity range.
• Showcased simultaneous assessment of compound properties (solubility, purity, formula accuracy) and protein integrity.
• Successfully applied these NMR techniques to oncogenic KRAS mutants.

Conclusions:

• NMR-based fragment screening and binding mapping are effective for drug discovery targeting KRAS.
• These methods provide comprehensive data for evaluating fragment leads and understanding target engagement.