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Updated: Jun 24, 2025
11:16
Hydrophobic Salt-modified Nafion for Enzyme Immobilization and Stabilization
Published on: July 11, 2012
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A Synergetic Pore Compartmentalization and Hydrophobization Strategy for Synchronously Boosting the Stability and
Lihong Guo1,2, Rongwei He1,2, Guosheng Chen1,3
1MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China.
Journal of the American Chemical Society
|June 12, 2024
Summary
Researchers developed a novel nanocarrier strategy to immobilize lipase, enhancing both its stability and catalytic activity. This engineered lipase shows improved performance in ester hydrolysis and enantioselective catalysis.
Area of Science:
- Biocatalysis
- Materials Science
- Enzyme Engineering
Background:
- Enzyme immobilization in nanocarriers offers enhanced stability and recyclability for biocatalysts.
- Immobilized enzymes often suffer reduced activity due to mass transfer limitations and conformational changes.
- Developing strategies to maintain or boost enzyme activity upon immobilization is crucial.
Purpose of the Study:
- To engineer a nanocarrier system that simultaneously enhances lipase stability and catalytic activity.
- To investigate the effects of pore structure and hydrophobicity on immobilized lipase performance.
- To demonstrate the efficacy of the engineered biocatalyst in enantioselective catalysis.
Main Methods:
- Utilizing a hierarchically porous metal-organic framework (NU-1003) with interconnected mesopores and micropores.
- Modifying the mesopore channels with chain-adjustable fatty acids to create a hydrophobic environment.
- Trapping lipase within the engineered pores of the modified NU-1003 framework.
- Evaluating the activity and stability of the immobilized lipase in ester hydrolysis and enantioselective reactions.
Main Results:
- The engineered nanocarrier system successfully trapped lipase, conferring enhanced stability and activity.
- Interconnected pores facilitated efficient substrate-to-enzyme communication.
- Fatty acid modification created a hydrophobic environment that activated lipase's open conformation.
- Immobilized lipase exhibited 1.57-fold and 2.46-fold higher activities in ester hydrolysis and enantioselective catalysis, respectively, compared to native lipase.
- The heterogeneous biocatalyst demonstrated high efficiency in the kinetic resolution of enantiomers.
Conclusions:
- Synergistic pore engineering of metal-organic frameworks provides a viable strategy for developing advanced heterogeneous biocatalysts.
- The dual effects of pore compartmentalization and hydrophobization activation significantly boost immobilized lipase performance.
- This approach offers a promising route for efficient and selective enzymatic transformations, particularly in chiral synthesis.
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