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High efficient expression of bioactive human BMP-14 in E. coli using SUMO fusion partner
Jian Feng Li1, Xian Wei Cui, Hai Yan Ji
1Jiangsu Province Key Laboratory for Molecular and Medical Biotechnology, Life Science College, Nanjing Normal University, Nanjing, Jiangsu, People's Republic of China.
The Protein Journal
|November 8, 2011
Summary
Researchers developed a SUMO fusion technology for efficient expression and purification of human Bone Morphogenetic Protein-14 (hBMP-14). This method yields high-purity recombinant hBMP-14, which retains biological activity, offering a scalable production strategy.
Area of Science:
- Biochemistry
- Molecular Biology
- Protein Engineering
Background:
- Bone morphogenetic proteins (BMPs) are crucial TGF-β superfamily cytokines involved in embryonic development and adult bone/cartilage differentiation.
- Efficient production of recombinant BMPs is essential for research and therapeutic applications.
Purpose of the Study:
- To apply SUMO fusion technology for the expression and purification of human BMP-14 (hBMP-14).
- To assess the purity, yield, and biological activity of the purified recombinant hBMP-14.
Main Methods:
- Utilized SUMO fusion technology for soluble expression of hBMP-14 in a bacterial system.
- Purified the SUMO-hBMP-14 fusion protein using Ni-IDA chromatography.
- Cleaved the SUMO tag using SUMO protease and further purified the released hBMP-14 via Ni-IDA chromatography.
Main Results:
- Achieved soluble expression and purification of hBMP-14 with over 90% purity.
- Obtained approximately 45 mg of high-purity recombinant hBMP-14 per litre of bacterial culture.
- Demonstrated that purified hBMP-14 dimer induces alkaline phosphatase activity in C2C12 cells in a dose-dependent manner.
Conclusions:
- SUMO fusion technology provides an effective system for producing highly pure and biologically active recombinant hBMP-14.
- This method shows potential for the scalable production of other homodimeric proteins.
- The developed system facilitates research into BMP functions and potential therapeutic uses.
