Lessons from pressure denaturation of proteins

Area of Science:

• Biochemistry
• Structural Biology
• Biophysics

Background:

• Protein sequence is understood to influence protein stability within specific structural contexts.
• Characterizing protein configurational equilibria typically involves chemical denaturants, temperature, or pH.
• High hydrostatic pressure is an underutilized thermodynamic parameter for studying protein conformational landscapes.

Purpose of the Study:

• To review the fundamental principles of pressure effects on protein structure and stability.
• To highlight the utility of high hydrostatic pressure in probing protein conformational landscapes.
• To explore how pressure-induced unfolding mechanisms offer unique insights into protein dynamics.

Main Methods:

• Review of existing literature on high hydrostatic pressure effects on proteins.
• Discussion of thermodynamic principles governing pressure perturbations.
• Analysis of pressure-induced protein unfolding mechanisms.

Main Results:

• High hydrostatic pressure can induce protein unfolding through distinct mechanisms compared to traditional denaturants.
• Pressure perturbation reveals thermodynamic properties related to volume changes in protein conformational transitions.
• The response of protein configurational equilibria to pressure provides valuable data on the protein's energy landscape.

Conclusions:

• High hydrostatic pressure is a powerful tool for dissecting protein conformational landscapes.
• Understanding pressure effects enhances our knowledge of protein folding, stability, and function.
• This approach offers complementary insights to conventional methods for characterizing protein dynamics.