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Published on: August 13, 2011
A microscale platform for integrated cell-free expression and activity screening of cellulases
Aarthi Chandrasekaran1, Rajiv Bharadwaj, Joshua I Park
1Joint BioEnergy Institute, Emeryville, CA 94608, USA.
Journal of Proteome Research
|August 26, 2010
Summary
A new in vitro protein synthesis method rapidly screens cellulase enzymes in 2-3 hours. This cost-effective, microscale approach reduces reagent use and accelerates discovery of novel enzymes.
Area of Science:
- Biotechnology
- Enzyme Engineering
- Molecular Biology
Background:
- Advances in cellulase production necessitate high-throughput screening technologies.
- Conventional methods for cellulase expression and screening are time-consuming and reagent-intensive.
Purpose of the Study:
- To develop a novel, cost-effective, microscale platform for rapid cellulase expression and activity screening.
- To integrate transcription, translation, and activity screening without protein purification.
Main Methods:
- Developed a microscale in vitro protein synthesis platform using microwell arrays.
- Utilized sensitive fluorescence-based detection for activity screening in low-volume assays (2-3 μL).
- Applied the platform for screening β-glucosidases (BGs) and cellobiohydrolases (CBHs) from thermophilic microorganisms.
Main Results:
- Achieved complete transcription, translation, and activity screening within 2-3 hours.
- Reduced reagent usage and cost by two orders of magnitude.
- Successfully screened BGs and CBHs, determined optimal activity temperatures, and studied product inhibition.
Conclusions:
- The developed platform offers a rapid, cost-effective solution for high-throughput cellulase screening.
- Enables efficient identification of cellulases with desired properties from large libraries.
- Facilitates subsequent large-scale production for detailed characterization.
