Nanosizing a Metal-Organic Framework Enzyme Carrier for Accelerating Nerve Agent Hydrolysis

Area of Science:

• Materials Science
• Biochemistry
• Chemical Engineering

Background:

• Metal-organic frameworks (MOFs) offer tunable porous structures for various applications.
• Enzyme immobilization is crucial for enhancing enzyme stability and catalytic activity.
• Organophosphorus acid anhydrolase (OPAA) is a key enzyme for hydrolyzing toxic nerve agents.

Purpose of the Study:

• To synthesize and characterize a novel, water-stable zirconium MOF, NU-1003.
• To immobilize OPAA within NU-1003 for enhanced nerve agent hydrolysis.
• To investigate the effect of MOF size on the catalytic efficiency of immobilized OPAA.

Main Methods:

• Synthesis and characterization of zirconium-based MOF NU-1003.
• Immobilization of OPAA enzyme within nanosized and microsized NU-1003 particles.
• Assay of catalytic activity for nerve agent hydrolysis by free and immobilized OPAA.

Main Results:

• NU-1003, a water-stable zirconium MOF with the largest mesoporous aperture, was successfully synthesized.
• Immobilization of OPAA in nanosized NU-1003 significantly enhanced its catalytic efficiency.
• Nanosized NU-1003-immobilized OPAA outperformed both microsized NU-1003-immobilized OPAA and free OPAA.

Conclusions:

• Nanosized enzyme carriers based on MOF NU-1003 provide a highly efficient platform for nerve agent hydrolysis.
• The developed MOF-enzyme system offers a promising strategy for rapid detoxification of nerve agents.
• This study demonstrates the potential of advanced materials in developing effective countermeasures against chemical threats.