Vault Nanoparticles Packaged with Enzymes as an Efficient Pollutant Biodegradation Technology.

Area of Science:

• Biotechnology
• Environmental Science
• Nanotechnology

Background:

• Enzymatic biodegradation offers efficient in situ environmental cleanup.
• Limited stability of extracellular enzymes hinders practical applications.
• Encapsulation can improve enzyme stability but may reduce catalytic efficiency.

Purpose of the Study:

• To develop a method for enhancing enzyme stability using vault nanoparticles.
• To investigate the impact of vault encapsulation on enzyme activity and stability.
• To assess the effectiveness of vault-packaged enzymes in degrading environmental contaminants.

Main Methods:

• Synthesized vault nanoparticles for enzyme encapsulation.
• Fused Manganese Peroxidase (MnP) with an INT packaging domain.
• Incorporated MnP-INT fusion protein into vault nanoparticles.
• Assessed peroxidase activity, stability, and biodegradation of phenol.

Main Results:

• Vault-packaged MnP-INT maintained peroxidase activity.
• Encapsulated MnP-INT showed significantly enhanced stability compared to free MnP-INT.
• Vault-packaged MnP-INT demonstrated a 3-fold increase in phenol biodegradation over 24 hours.
• Vault encapsulation slightly increased the Km value without compromising catalytic activity.

Conclusions:

• Vault nanoparticles provide an effective strategy for stabilizing enzymes.
• This approach enhances enzymatic stability and catalytic performance for bioremediation.
• Vault-based enzyme packaging holds promise for sustainable removal of multiple contaminants from water.