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[Expression, purification and characterization of recombinant human cyclophilin A]
Wei Sheng Wu Xue Bao = Acta Microbiologica Sinica
|January 29, 2003
Summary
Researchers successfully produced ample human cyclophilin A (CyPA) in E. coli using a novel expression vector. This method avoids the need for human tissues, yielding active recombinant CyPA protein efficiently.
Area of Science:
- Molecular Biology
- Biochemistry
- Protein Expression
Background:
- Obtaining sufficient quantities of human proteins for research can be challenging due to tissue availability.
- Human cyclophilin A (CyPA) is a crucial protein with peptidyl-prodyl cis-trans isomerase activity.
- Previous methods for CyPA purification were limited by the accessibility of human tissues.
Purpose of the Study:
- To develop a scalable method for producing recombinant human CyPA in Escherichia coli (E. coli).
- To construct an efficient expression vector for high-level CyPA production.
- To confirm the functional activity of the expressed recombinant CyPA.
Main Methods:
- Cloning of the cDNA encoding human CyPA from the MT4 lymph cell line.
- Construction of a pET11/CyPA expression vector under the T7 promoter.
- Induction of recombinant CyPA expression in E. coli and subsequent protein analysis.
Main Results:
- The recombinant CyPA was expressed at high levels, constituting 41% of total soluble cell protein.
- The expressed protein demonstrated significant peptidyl-prodyl cis-trans isomerase activity.
- The pET11/CyPA vector facilitated efficient and ample production of functional human CyPA.
Conclusions:
- Plasmid-derived expression in E. coli is a viable and efficient strategy for producing large quantities of human CyPA.
- This method overcomes the limitations associated with obtaining human tissues for protein purification.
- The recombinant CyPA produced is functionally active, making it suitable for further biochemical and structural studies.