Efficient purification of native recombinant proteins using proteases immobilized on cellulose

Area of Science:

• Biochemistry
• Protein Purification
• Molecular Biology

Background:

• Protein purification is crucial for biochemical and molecular biology research.
• Traditional methods can be time-consuming and may lead to protein degradation.
• Developing efficient and rapid purification techniques is essential.

Purpose of the Study:

• To develop and validate a novel protein purification strategy using cellulose binding domain (CBD) fusion technology.
• To demonstrate the efficacy of CBD fusion protease for cleaving fusion proteins and facilitating purification.
• To assess the efficiency of separating tag-free target proteins from the CBD tag and protease.

Main Methods:

• Employing a cellulose binding domain (CBD) fusion protease to digest CBD fusion proteins.
• Utilizing cellulose as an affinity matrix to adsorb the CBD tag and fusion protease.
• Separating the tag-free target protein from the adsorbed components via centrifugation.
• Purifying green fluorescent protein (GFP) as a model target protein.

Main Results:

• The CBD fusion protease effectively cleaved the CBD fusion protein.
• The CBD tag and fusion protease were successfully adsorbed onto cellulose.
• Tag-free target proteins were efficiently separated from the cellulose-bound components.
• High purity of green fluorescent protein was achieved using this method.

Conclusions:

• Cellulose binding domain (CBD) fusion protease offers an efficient method for protein purification.
• This technique simplifies the separation of tag-free proteins from fusion tags and proteases.
• The method is effective for purifying various proteins, including green fluorescent protein.