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Exploring Enzyme Encapsulation Efficiency in MOFs Using Eco-Friendly Approaches.

Trung Hieu Vo1,2, Shang-Wei Lin3, Miao-Chun Lin1

  • 1Department of Chemistry, National Central University, Taoyuan, Taiwan.

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|September 27, 2024
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Summary
This summary is machine-generated.

Encapsulating protein enzymes in metal-organic frameworks (MOFs) enhances loading and activity. Enzyme properties like isoelectric point (pI) significantly impact MOF encapsulation success for biocomposite development.

Keywords:
Enzyme encapsulationIsoelectric pointMechanochemistryMetal-organic frameworksWater-based

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Area of Science:

  • Biomaterials Science
  • Chemical Engineering
  • Enzyme Technology

Background:

  • Enzyme immobilization in metal-organic frameworks (MOFs) is a key strategy for enhancing enzyme stability and reusability.
  • Understanding the factors influencing enzyme loading capacity within MOFs is crucial for optimizing their performance.

Purpose of the Study:

  • To investigate the impact of enzyme loading and isoelectric point (pI) on enzyme encapsulation within MOFs.
  • To evaluate the protective effect of MOF shells against enzymatic degradation.
  • To explore the influence of enzyme properties on MOF formation and encapsulation efficiency.

Main Methods:

  • Mechanochemical (ball-milling) and water-based approaches for enzyme encapsulation in MOFs.
  • Varying enzyme concentrations and utilizing enzymes with different isoelectric points (pI).
  • Activity assays and proteinase K degradation tests to assess enzyme performance and stability.
  • Computational simulations to understand the effect of enzyme properties on MOF formation.

Main Results:

  • Increased enzyme loading enhances MOF encapsulation capacity without compromising enzyme activity.
  • MOF shells provide protection against proteinase K degradation via a size-sheltering mechanism.
  • Enzymes with lower pI values (e.g., catalase, pI 5.4) are more readily encapsulated than those with higher pI values (e.g., lysozyme, pI 11.35).
  • Excess enzyme can inhibit ZIF-90 formation, and higher enzyme amounts/pI values increase the activation energy for MOF formation.

Conclusions:

  • Enzyme properties, particularly pI and concentration, are critical determinants of successful MOF encapsulation.
  • Optimizing enzyme-MOF biocomposites requires careful consideration of enzyme characteristics for diverse applications like drug delivery.
  • This study provides foundational insights for designing advanced enzyme-MOF systems.