Simplified protein purification using an autoprocessing, inducible enzyme tag

Area of Science:

• Biochemistry
• Molecular Biology
• Protein Chemistry

Background:

• Affinity tags are crucial for simplifying recombinant protein purification.
• Existing methods often require multiple steps for tag removal, increasing complexity.
• Improving protein expression, solubility, and stability remains a key challenge.

Purpose of the Study:

• To present a streamlined, one-step method for purifying recombinant proteins.
• To demonstrate the efficacy of a C-terminal autoprocessing protease tag for purification.
• To evaluate the impact of this tag on protein expression, stability, and solubility.

Main Methods:

• Utilizing a highly specific, inducible, C-terminal autoprocessing protease tag for Escherichia coli expression.
• Integrating affinity purification, tag cleavage, and tag separation into a single procedure.
• Assessing protein expression, solubility, and stability with the novel tag.

Main Results:

• The described method simplifies affinity purification, cleavage, and tag separation into a one-step process.
• This approach eliminates the need for exogenous proteases to remove fusion tags.
• The autoprocessing tag was shown to enhance the expression, stability, and solubility of select recombinant proteins.

Conclusions:

• A novel, one-step purification strategy using an autoprocessing protease tag is presented.
• This method significantly accelerates recombinant protein purification and improves protein characteristics.
• The C-terminal autoprocessing tag offers a valuable tool for protein biochemistry and molecular biology research.