Enzymatic cascade reaction in simple-coacervates.

Area of Science:

• Biotechnology
• Chemical Engineering
• Biochemistry

Background:

• Enzymatic droplet-sized reactors have broad applications in diagnostics, purification, and industry.
• Coacervates offer a simple, all-aqueous model for studying enzyme cascade reactions, preserving enzyme integrity.
• The impact of enzyme sequestration and proximity within coacervates on their activity requires further investigation.

Purpose of the Study:

• To construct and investigate enzymatic reactors using coacervates of ampholyte polymer chains stabilized with agar.
• To demonstrate the ability of these coacervates to sequester enzymes like glucose oxidase and catalase while maintaining their catalytic activity.
• To explore the influence of proximity and confinement within coacervates on enzymatic cascade reactions.

Main Methods:

• Construction of enzymatic reactors utilizing simple coacervation of ampholyte polymer chains stabilized with agar.
• Demonstration of enzyme sequestration (glucose oxidase, catalase) and activity preservation within coacervates.
• Analysis of enzymatic cascade reactions via colorimetric detection of resazurin reduction to resorufin and its regeneration.

Main Results:

• Coacervates successfully sequestered glucose oxidase and catalase, preserving their catalytic activity.
• An enzymatic cascade reaction involving glucose oxidase and catalase was demonstrated within the coacervates.
• The colorimetric assay using resazurin reduction showed a clear indication of the enzymatic cascade, with resorufin regeneration observed.

Conclusions:

• Coacervates serve as effective enzymatic reactors, capable of sequestering enzymes and facilitating cascade reactions.
• The proximity and confinement of enzymes within coacervates do not impede, and may influence, their catalytic activity.
• This study provides valuable insights into the behavior of enzymes in confined, all-aqueous environments for potential biotechnological applications.