NMR methods for investigating functionally relevant biomolecular dynamics

Area of Science:

• Biochemistry and Biophysics
• Structural Biology
• Molecular Dynamics

Background:

• Biomolecular dynamics occur across diverse timescales, with microsecond-to-millisecond (μs-ms) dynamics being critical for biological processes.
• These dynamics influence enzyme catalysis, protein folding, ligand binding, and allosteric regulation, impacting overall biological function.

Purpose of the Study:

• To provide an overview of Nuclear Magnetic Resonance (NMR) spectroscopy methods for investigating μs-ms timescale dynamics.
• To highlight recent advances and interrelationships between key NMR techniques.
• To showcase applications in elucidating biomolecular dynamics.

Main Methods:

• Carr-Purcell-Meiboom-Gill (CPMG) relaxation dispersion.
• Chemical Exchange Saturation Transfer (CEST).
• Rotating-frame longitudinal relaxation dispersion (R_1ρ relaxation dispersion).

Main Results:

• These NMR methods offer powerful insights into the kinetic, thermodynamic, and structural aspects of biomolecular function.
• The review details the fundamental principles and recent advancements of CPMG, CEST, and R_1ρ relaxation dispersion.
• Applications demonstrate the utility of these techniques in understanding complex biological processes.

Conclusions:

• NMR spectroscopy is essential for probing μs-ms timescale dynamics in biomolecules.
• CPMG, CEST, and R_1ρ relaxation dispersion are versatile tools for studying molecular mechanisms.
• Understanding these dynamics is key to advancing fields like drug discovery and protein engineering.