Revealing protein dynamics with high-pressure NMR

Area of Science:

• Biophysics
• Structural Biology
• Protein Dynamics

Background:

• Protein structure prediction from sequence is advanced, but predicting functional dynamics remains a challenge.
• Understanding protein dynamics is crucial for function and turnover, but key states are difficult to access experimentally.
• Existing methods like high temperatures or chemical denaturants have limitations in probing these states.

Purpose of the Study:

• To explore methods for accessing and characterizing high-energy protein dynamic states.
• To investigate the utility of high hydrostatic pressure as a perturbation tool for protein dynamics.

Main Methods:

• Utilizing high hydrostatic pressure as a variable to perturb protein structure.
• Analyzing local structural disruption around internal cavities within proteins.
• Characterizing populated higher free energy states through pressure-induced perturbations.

Main Results:

• High hydrostatic pressure can locally perturb protein structure near internal cavities.
• This perturbation leads to partial structural disruption and populates higher energy states.
• Pressure provides a method to access and characterize states not typically populated.

Conclusions:

• High hydrostatic pressure is a valuable tool for studying protein functional dynamics.
• It offers a way to access and characterize transient, high-energy conformational states.
• This approach can contribute to building a larger experimental database for sequence-dynamics-function relationships.