Cloning and Expression of Human Stem Cell Factor Fused with Thrombopoietin Mimetic Peptide in Escherichia coli |
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Authors: | Lin Su Songsen Chen Kegong Yang Changzheng Liu Zhiquan Liang |
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Affiliation: | (1) National Laboratory of Medical Molecular Biology, Department of Biochemistry and Molecular Biology, Peking Union Medical College, Beijing, 100005, China |
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Abstract: | Thrombopoietin (TPO) acts synergistically with stem cell factor (SCF) in hematopoiesis and megakaryopoiesis. In this work, we designed the expression of SCF fused with the monomer or the dimer of TPO mimetic peptide through a flexible peptide linker. The recombinant fusion proteins were produced in E. coli DH5α at up to 25% of total cell proteins. The resultant inclusion bodies were refolded by dilution and purified by ion-exchange chromatography. Subsequent biological activity assays showed that the fusion proteins exhibited higher potency than recombinant human SCF, indicating that they have a potential role for pharmaceutical applications. |
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Keywords: | Fusion Mimetic peptide Stem cell factor Thrombopoietin |
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