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A Modular Microfluidic Technology for Systematic Studies of Colloidal Semiconductor Nanocrystals
Published on: May 10, 2018
Customizable colloidosomes confining enzymes for continuous-flow biocatalysis
Qi Zeng1, Dingyi Yang2, Ting Guo2
1Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Sciences and Engineering, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, PR China; College of Food Science and Pharmacy, Zhejiang Ocean University, Zhoushan 316022, PR China.
We developed a novel method to create enzyme-confined colloidosomes (CSs) for enhanced biocatalysis. These customized CSs significantly boost enzyme efficiency and stability in continuous-flow systems.
Area of Science:
- Biocatalysis and enzyme engineering
- Materials science and nanotechnology
- Chemical engineering and process intensification
Background:
- Enzyme confinement at the molecular scale offers unique catalytic advantages but existing hosts have limitations.
- Developing robust and efficient enzyme hosts is crucial for advancing biocatalysis, especially in continuous-flow applications.
Purpose of the Study:
- To develop a mild, one-pot method for creating enzyme-sized porous colloidosomes (CSs) as enzyme hosts.
- To optimize the confinement of Candida antarctica lipase B (CALB) within these CSs for continuous-flow biocatalysis.
- To evaluate the activity recovery, leaching, catalytic efficiency, and long-term stability of CALB-confined CSs (CALB/CSs).
Main Methods:
- A one-pot emulsification-directing approach utilizing dissolution-induced inside-out self-assembly.
- Customization of colloidosome pore size using silica nanoparticles (SiO2 NPs) as building blocks.
- Confinement of Candida antarctica lipase B (CALB) within 5.8-nm pores of CSs prepared with 22-nm SiO2 NPs.
Main Results:
- Achieved 98.3% activity recovery and minimal 2.1% leaching of CALB within the CSs.
- CALB/CSs exhibited dozens of times higher catalytic efficiency than free CALB in batch mode.
- Integrated CALB/CSs with a continuous-flow platform achieved a 21.3-fold increase in catalytic efficiency.
- Demonstrated long-term stability with over 85% efficiency maintained after 200 hours of continuous operation.
Conclusions:
- The developed CS platform provides an effective and generalizable strategy for enzyme confinement.
- Optimized CALB/CSs demonstrate superior performance in continuous-flow biocatalysis, overcoming limitations of existing enzyme hosts.
- This approach holds significant potential for unlocking the full capabilities of enzymatic reactions in industrial manufacturing.
