A novel self-cleavable tag Zbasic–∆I-CM and its application in the soluble expression of recombinant human interleukin-15 in Escherichia coli

Soluble expression of recombinant therapeutic proteins in Escherichia coli ( E. coli ) has been a challenging task in biopharmaceutical development. In this study, a novel self-cleavable tag Zbasic–intein has been constructed for the soluble expression and purification of a recombinant cytokine, hum...

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Veröffentlicht in:Applied microbiology and biotechnology 2017-02, Vol.101 (3), p.1133-1142
Hauptverfasser: Shi, Siwei, Chen, Huanhuan, Jiang, Hua, Xie, Yueqing, Zhang, Lei, Li, Ninghuan, Zhu, Chencen, Chen, Junsheng, Luo, Han, Wang, Jiaxian, Feng, Lei, Lu, Huili, Zhu, Jianwei
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container_title Applied microbiology and biotechnology
container_volume 101
creator Shi, Siwei
Chen, Huanhuan
Jiang, Hua
Xie, Yueqing
Zhang, Lei
Li, Ninghuan
Zhu, Chencen
Chen, Junsheng
Luo, Han
Wang, Jiaxian
Feng, Lei
Lu, Huili
Zhu, Jianwei
description Soluble expression of recombinant therapeutic proteins in Escherichia coli ( E. coli ) has been a challenging task in biopharmaceutical development. In this study, a novel self-cleavable tag Zbasic–intein has been constructed for the soluble expression and purification of a recombinant cytokine, human interleukin-15 (IL-15). We screened several solubilizing tags fused with the self-cleavable Mycobacterium tuberculosis recA mini-intein ∆I-CM and demonstrated that Zbasic tag can significantly improve the solubility of the product with correspondent to the intein activity. The fusion protein “Zbasic–∆I-CM–IL-15” was expressed with high solubility and easily enriched by the cost-effective cation-exchange chromatography. The self-cleavage of the fusion tag Zbasic–∆I-CM was then induced by a pH shift, with an activation energy of 7.48 kcal/mol. The mature IL-15 with natural N-terminus was released and further purified by hydrophobic interaction and anion-exchange chromatography. High-resolution reverse-phase high-performance liquid chromatography and mass spectrometry analysis confirmed that the product was of high purity and correct mass. With a CTLL-2 cell proliferation-based assay, the EC 50 was evaluated to be of about 0.126 ng/mL, similar to the product in clinical trials. By avoiding the time-consuming denaturing-refolding steps in previously reported processes, the current method is efficient and cost-effective. The novel tag Zbasic–∆I-CM can be potentially applied to large-scale manufacturing of recombinant human cytokines as well as other mammalian-sourced proteins in E. coli .
doi_str_mv 10.1007/s00253-016-7848-2
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In this study, a novel self-cleavable tag Zbasic–intein has been constructed for the soluble expression and purification of a recombinant cytokine, human interleukin-15 (IL-15). We screened several solubilizing tags fused with the self-cleavable Mycobacterium tuberculosis recA mini-intein ∆I-CM and demonstrated that Zbasic tag can significantly improve the solubility of the product with correspondent to the intein activity. The fusion protein “Zbasic–∆I-CM–IL-15” was expressed with high solubility and easily enriched by the cost-effective cation-exchange chromatography. The self-cleavage of the fusion tag Zbasic–∆I-CM was then induced by a pH shift, with an activation energy of 7.48 kcal/mol. The mature IL-15 with natural N-terminus was released and further purified by hydrophobic interaction and anion-exchange chromatography. High-resolution reverse-phase high-performance liquid chromatography and mass spectrometry analysis confirmed that the product was of high purity and correct mass. With a CTLL-2 cell proliferation-based assay, the EC 50 was evaluated to be of about 0.126 ng/mL, similar to the product in clinical trials. By avoiding the time-consuming denaturing-refolding steps in previously reported processes, the current method is efficient and cost-effective. 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In this study, a novel self-cleavable tag Zbasic–intein has been constructed for the soluble expression and purification of a recombinant cytokine, human interleukin-15 (IL-15). We screened several solubilizing tags fused with the self-cleavable Mycobacterium tuberculosis recA mini-intein ∆I-CM and demonstrated that Zbasic tag can significantly improve the solubility of the product with correspondent to the intein activity. The fusion protein “Zbasic–∆I-CM–IL-15” was expressed with high solubility and easily enriched by the cost-effective cation-exchange chromatography. The self-cleavage of the fusion tag Zbasic–∆I-CM was then induced by a pH shift, with an activation energy of 7.48 kcal/mol. The mature IL-15 with natural N-terminus was released and further purified by hydrophobic interaction and anion-exchange chromatography. 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source MEDLINE; SpringerNature Journals
subjects Analysis
Biomedical and Life Sciences
Biopharmaceutics - methods
Biotechnologically Relevant Enzymes and Proteins
Biotechnology
Chromatography
Chromatography, Liquid
Clinical trials
Cytokines
E coli
Enzymes
Escherichia coli - genetics
Escherichia coli - metabolism
Gene expression
Genetic recombination
Humans
Hydrogen-Ion Concentration
Inteins
Interleukin-15 - chemistry
Interleukin-15 - genetics
Interleukin-15 - isolation & purification
Life Sciences
Liquid chromatography
Mass Spectrometry
Microbial Genetics and Genomics
Microbiology
Mycobacterium tuberculosis - genetics
Pharmaceutical sciences
Plasmids
Proteins
Recombinant Fusion Proteins - chemistry
Recombinant Fusion Proteins - economics
Recombinant Fusion Proteins - isolation & purification
Solubility
Studies
title A novel self-cleavable tag Zbasic–∆I-CM and its application in the soluble expression of recombinant human interleukin-15 in Escherichia coli
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