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Microchip bioreactors based on trypsin-immobilized graphene oxide-poly(urea-formaldehyde) composite coating for
Huizhi Fan1, Feina Yao, Shuyuan Xu
1School of Pharmacy, Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China.
Talanta
|November 12, 2013
Summary
This study developed a microfluidic bioreactor using graphene oxide-poly(urea-formaldehyde) composite for rapid protein digestion. The novel system achieved highly efficient proteolysis in under 5 seconds, enabling high-throughput protein identification.
Area of Science:
- Biochemistry
- Materials Science
- Microfluidics
Background:
- Proteolysis is crucial for protein identification.
- Traditional methods are time-consuming.
- Microfluidic devices offer potential for faster analysis.
Purpose of the Study:
- To develop a microfluidic bioreactor for efficient and rapid proteolysis.
- To immobilize trypsin onto a graphene oxide-poly(urea-formaldehyde) composite.
- To demonstrate the system's performance for protein digestion and identification.
Main Methods:
- Covalent immobilization of trypsin onto graphene oxide-poly(urea-formaldehyde) composite-coated microfluidic channels.
- Fabrication of microfluidic bioreactors using poly(methyl methacrylate) microchips.
- Digestion of model proteins (BSA, lysozyme, ovalbumin, myoglobin).
- Analysis of digested peptides using MALDI-TOF MS.
Main Results:
- Successful fabrication of microfluidic bioreactors with immobilized trypsin.
- Achieved highly efficient proteolysis in less than 5 seconds.
- Obtained satisfactory sequence coverages comparable to 12-hour in-solution digestion.
- Demonstrated feasibility for high-throughput protein identification.
Conclusions:
- The developed microfluidic bioreactor enables rapid and efficient proteolysis.
- Graphene oxide-based composites are suitable for enzyme immobilization in microfluidic devices.
- This strategy holds promise for high-throughput proteomic analysis.
