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Pressure-induced activity loss in solid state catalase
1Division of Pharmaceutics, College of Pharmacy, University of Iowa, Iowa City 52242, USA.
Journal of Pharmaceutical Sciences
|February 1, 1995
Summary
High pressure significantly reduces catalase enzyme activity in solid form, with activity decreasing linearly with compaction pressure up to 251 MPa.
Area of Science:
- Biochemistry
- Physical Chemistry
- Protein Science
Background:
- Pressure can reduce enzyme activity in solution and solid states.
- Investigating pressure effects on solid-state proteins is crucial for understanding their behavior.
Purpose of the Study:
- To examine the impact of compaction pressure on the activity of solid-state catalase.
- To establish a correlation between compaction pressure, enzyme activity, and compact density.
Main Methods:
- Catalase powder was compacted at pressures ranging from 0 to 669 MPa.
- Spectrophotometric assays measured catalase activity by monitoring hydrogen peroxide decomposition.
- Compact densities were calculated and correlated with enzyme activity.
Main Results:
- Catalase activity decreased by up to 30% at compaction pressures of 251 MPa and above.
- A strong linear correlation was observed between enzyme activity and compaction pressure (0–251 MPa).
- The correlation between compact density and enzyme activity was less pronounced.
Conclusions:
- Compaction pressure significantly impacts solid-state catalase activity.
- Linear relationship suggests pressure directly affects enzyme function in the solid state.
- Further research is needed to elucidate the exact mechanism of pressure-induced enzyme inactivation.