Related Experiment Video
Updated: Sep 13, 2025
09:26
High-throughput Protein Expression Generator Using a Microfluidic Platform
Published on: August 23, 2012
11.9K
Ultrahigh-Throughput Multiplexed Screening of Purified Protein from Cell-Free Expression Using Droplet Microfluidics.
Anqi Chen1, Wentao Xu1, Xinge Diana Zhang1
1John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States.
Journal of the American Chemical Society
|July 31, 2025
Summary
We developed an ultrahigh-throughput droplet microfluidics platform for cell-free protein engineering. This method screens millions of protein variants rapidly, significantly improving thermotolerance in enzymes like Bacillus subtilis Lipase A.
Area of Science:
- Biotechnology
- Biochemistry
- Molecular Biology
Background:
- Traditional protein engineering methods face limitations in throughput and biological variability.
- Screening large libraries is crucial for advancing protein engineering applications.
Purpose of the Study:
- To develop an ultrahigh-throughput platform for screening purified protein libraries using cell-free expression.
- To engineer Bacillus subtilis Lipase A (BsLipA) for enhanced thermotolerance.
Main Methods:
- Utilized droplet microfluidics with bifunctional agarose beads for cell-free protein expression and purification.
- Implemented multiplexed screening to achieve throughput of 10 million variants per hour.
- Engineered a combinatorial library with 15 saturated residues for BsLipA.
Main Results:
- Achieved a ~100-fold increase in screening throughput compared to conventional methods.
- Identified multiple BsLipA variants with 9-12 substitutions exhibiting >40 °C improved thermotolerance.
- Demonstrated enhanced signal-to-noise ratio using cell-free expression over live-cell systems.
Conclusions:
- The developed droplet microfluidics platform provides a robust and scalable solution for ultrahigh-throughput protein engineering.
- This technology enables rapid identification of protein variants with significantly improved functional properties, such as enhanced thermotolerance.
