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Updated: Aug 19, 2026

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Published on: July 11, 2012
The use of pressure to modify enzyme activity in reversed micelles
A M Rao1, N Kommareddi, V T John
1Department of Chemical Engineering, Tulane University, New Orleans, Louisiana 70118.
Abstract:
Pressurization of enzyme-containing AOT-water-isooctane reversed micelles with low molecular weight gases leads to markedly different responses in activity characteristics. Microbial lipases exhibit a total cutoff in activity with as low a pressure as 2 MPa and a remarkable activity regain with depressurization. The observation also holds for reaction in monophasic organic solvents. The protease, alpha-chymotrypsin, is unaffected by pressurization until a critical pressure wherein micellar instability occurs. The use of pressure as a switch for lipase reaction in nonaqueous media is discussed.
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