A high-performance protein preparation approach in a single column-free step

Area of Science:

• Biotechnology
• Protein Biochemistry
• Molecular Biology

Background:

• Protein purification is a critical yet challenging and expensive step in biotechnology.
• Existing methods often involve costly columns and complex procedures.
• There is a need for more efficient and economical protein production strategies.

Purpose of the Study:

• To introduce and validate a new column-free protein purification method, the cleavable self-aggregating tag 2.0 (cSAT2.0) scheme.
• To demonstrate the efficiency, purity, and scalability of the cSAT2.0 scheme for protein production.
• To establish cSAT2.0 as a robust and economical platform for recombinant protein expression.

Main Methods:

• Development and application of the cleavable self-aggregating tag 2.0 (cSAT2.0) scheme for protein purification.
• Expression of six proteins (one peptide, five proteins) in Escherichia coli using shake-flask cultures in lysogeny broth (LB) medium.
• High-throughput protein preparation using microplates.
• Scale-up fermentation of caplacizumab in a 5-l fermenter.

Main Results:

• The cSAT2.0 scheme yielded high quantities of proteins, ranging from 24 mg/l to 89 mg/l, with exceptional purity exceeding 98%.
• Successful high-throughput protein preparation was achieved on microplates.
• Scale-up fermentation of caplacizumab resulted in 1.4 g/l of highly purified protein.
• The method demonstrated broad applicability across different proteins and scales.

Conclusions:

• The cSAT2.0 scheme offers a streamlined, column-free approach for efficient and high-purity protein production.
• This method is cost-effective and scalable, suitable for various applications from laboratory research to industrial production.
• The cSAT2.0 scheme represents a significant advancement in biotechnology for recombinant protein manufacturing.