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Controlling enzymatic activity by immobilization on graphene oxide
Paulina Bolibok1, Marek Wiśniewski2,3, Katarzyna Roszek4
1Faculty of Chemistry, Physicochemistry of Carbon Materials Research Group, Nicolaus Copernicus University in Toruń, Gagarin St. 7, 87-100, Toruń, Poland.
Die Naturwissenschaften
|April 1, 2017
Summary
Graphene oxide (GO) enhances enzyme immobilization, improving catalase activity and stability. This study reveals how the enzyme/GO ratio controls biocatalytic processes and boosts cell viability against oxidative stress.
Area of Science:
- Biocatalysis
- Materials Science
- Enzyme Engineering
Background:
- Graphene oxide (GO) offers high protein adsorption capacity.
- GO's properties can beneficially modify enzyme activity.
- Enzyme immobilization on novel materials is crucial for biocatalysis.
Purpose of the Study:
- To investigate graphene oxide as a matrix for enzyme immobilization.
- To explore the impact of GO on catalase activity, stability, and kinetics.
- To establish a correlation between enzyme/GO ratio and biocatalytic performance.
Main Methods:
- Immobilization of catalase onto graphene oxide.
- Characterization of enzyme-bound GO using kinetic and structural analyses.
- In vitro functional tests to assess biocatalytic system performance.
Main Results:
- Graphene oxide exhibits superior protein adsorption compared to other carbon materials.
- Catalase activity and stability are tunable via the enzyme/GO ratio.
- Kinetic parameters correlate with enzyme secondary structure changes on GO.
- Immobilized catalase enhanced cellular viability under oxidative stress.
Conclusions:
- Graphene oxide is an effective matrix for enzyme immobilization, enabling controlled biocatalysis.
- The enzyme/GO ratio is a key factor for optimizing biocatalytic systems.
- GO-based biocatalysts demonstrate potential for applications requiring enhanced stability and cell protection.