The powerful high pressure tool for protein conformational studies.

Area of Science:

• Biochemistry
• Thermodynamics
• Protein Science

Background:

• Proteins exhibit pressure-induced structural disordering, analogous to temperature effects.
• Intermolecular interactions post-unfolding are crucial for fibril formation.
• Protein stability is influenced by weak interactions sensitive to pressure and temperature.

Purpose of the Study:

• To explore the effects of hydrostatic pressure on protein structure and stability.
• To investigate pressure-induced protein unfolding and fibril formation.
• To elucidate the role of protein partial volume in enzyme function.

Main Methods:

• Analysis of protein behavior under varying hydrostatic pressure.
• Examination of pressure effects on tertiary structure, unfolding, and enzyme dissociation.
• Case studies involving prion proteins, ataxin, enolase, and butyrylcholinesterase.

Main Results:

• Pressure induces disordering of protein 2°, 3°, and 4° structures.
• Partial unfolding under pressure can lead to fibril formation, dependent on protein type.
• Pressure serves as a tool to study enzyme dissociation and partial molar volume.

Conclusions:

• Hydrostatic pressure significantly impacts protein structure and stability through effects on weak interactions.
• Understanding pressure-induced protein behavior is key to unraveling mechanisms of protein diseases.
• This research offers potential avenues for developing preventive and therapeutic strategies for proteinopathies.