A High-Throughput Multi Well Plate-Based Approach for the Combined Expression, Export, and Assay of Recombinant...

Area of Science:

• Biotechnology
• Molecular Biology
• Biochemistry

Background:

• High-throughput screening (HTS) of proteins is crucial for drug discovery, protein engineering, and biomarker identification.
• Traditional methods require large culture volumes and extensive purification, limiting experimental throughput.
• Current limitations hinder the simultaneous testing of numerous protein variants and assay types.

Purpose of the Study:

• To develop a streamlined HTS protocol for recombinant protein expression, export, and assay.
• To overcome the limitations of conventional protein purification methods in HTS.
• To enable direct use of expressed proteins in assays without additional purification steps.

Main Methods:

• Utilized Vesicle Nucleating peptide (VNp) technology for high-yield vesicular export of functional proteins from E. coli.
• Developed a single-plate protocol for overnight expression, export, and assay within the same microplate well.
• Integrated support protocols for cold-shock transformation, in-plate affinity-tag purification, and enzymatic assays.

Main Results:

• Achieved high-yield export of functional recombinant proteins directly into the culture medium.
• Demonstrated that the expressed protein is of sufficient purity and yield for direct use in plate-based enzymatic assays.
• Successfully implemented a simplified single-plate protocol for various HTS applications.

Conclusions:

• The VNp technology offers a significant advancement in HTS for protein-based research and development.
• This protocol simplifies protein production and screening, enabling broader applications in basic research and drug discovery.
• The method facilitates streamlined protein production, identification of activity-enhancing mutations, and ligand screening.