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Schloßhauer JL, Tholen L, Körner A, Kubick S, Chatzopoulou S, Hönow A, Zemella A. Promoting the production of challenging proteins via induced expression in CHO cells and modified cell-free lysates harboring T7 RNA polymerase and mutant eIF2α. Synth Syst Biotechnol 2024; 9:416-424. [PMID: 38601208 PMCID: PMC11004649 DOI: 10.1016/j.synbio.2024.03.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 02/12/2024] [Accepted: 03/16/2024] [Indexed: 04/12/2024] Open
Abstract
Chinese hamster ovary (CHO) cells are crucial in biopharmaceutical production due to their scalability and capacity for human-like post-translational modifications. However, toxic proteins and membrane proteins are often difficult-to-express in living cells. Alternatively, cell-free protein synthesis can be employed. This study explores innovative strategies for enhancing the production of challenging proteins through the modification of CHO cells by investigating both, cell-based and cell-free approaches. A major result in our study involves the integration of a mutant eIF2 translation initiation factor and T7 RNA polymerase into CHO cell lysates for cell-free protein synthesis. This resulted in elevated yields, while eliminating the necessity for exogenous additions during cell-free production, thereby substantially enhancing efficiency. Additionally, we explore the potential of the Rosa26 genomic site for the integration of T7 RNA polymerase and cell-based tetracycline-controlled protein expression. These findings provide promising advancements in bioproduction technologies, offering flexibility to switch between cell-free and cell-based protein production as needed.
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Affiliation(s)
- Jeffrey L. Schloßhauer
- Fraunhofer Project Group PZ-Syn of the Fraunhofer Institute for Cell Therapy and Immunology-IZI, Branch Bioanalytics and Bioprocesses-IZI-BB, Am Mühlenberg, Potsdam, Germany
- Fraunhofer Institute for Cell Therapy and Immunology-IZI, Branch Bioanalytics and Bioprocesses-IZI-BB, Am Mühlenberg, Potsdam, Germany
- Institute for Chemistry and Biochemistry, Laboratory of Protein Biochemistry, Freie Universität Berlin, Thielallee 63, 14195, Berlin, Germany
| | - Lena Tholen
- Fraunhofer Institute for Cell Therapy and Immunology-IZI, Branch Bioanalytics and Bioprocesses-IZI-BB, Am Mühlenberg, Potsdam, Germany
| | - Alexander Körner
- Fraunhofer Institute for Cell Therapy and Immunology-IZI, Branch Bioanalytics and Bioprocesses-IZI-BB, Am Mühlenberg, Potsdam, Germany
- Institute of Biotechnology, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Stefan Kubick
- Fraunhofer Institute for Cell Therapy and Immunology-IZI, Branch Bioanalytics and Bioprocesses-IZI-BB, Am Mühlenberg, Potsdam, Germany
- Faculty of Health Sciences, Joint Faculty of the Brandenburg University of Technology Cottbus –Senftenberg, The Brandenburg Medical School Theodor Fontane, University of Potsdam, Potsdam, Germany
- Institute for Chemistry and Biochemistry, Laboratory of Protein Biochemistry, Freie Universität Berlin, Thielallee 63, 14195, Berlin, Germany
| | - Sofia Chatzopoulou
- Fraunhofer Institute for Cell Therapy and Immunology-IZI, Branch Bioanalytics and Bioprocesses-IZI-BB, Am Mühlenberg, Potsdam, Germany
| | - Anja Hönow
- New/era/mabs GmbH, August-Bebel-Str. 89, 14482, Potsdam, Germany
| | - Anne Zemella
- Fraunhofer Institute for Cell Therapy and Immunology-IZI, Branch Bioanalytics and Bioprocesses-IZI-BB, Am Mühlenberg, Potsdam, Germany
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Schloßhauer JL, Dondapati SK, Kubick S, Zemella A. A Cost-Effective Pichia pastoris Cell-Free System Driven by Glycolytic Intermediates Enables the Production of Complex Eukaryotic Proteins. Bioengineering (Basel) 2024; 11:92. [PMID: 38247969 PMCID: PMC10813726 DOI: 10.3390/bioengineering11010092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 01/12/2024] [Accepted: 01/15/2024] [Indexed: 01/23/2024] Open
Abstract
Cell-free systems are particularly attractive for screening applications and the production of difficult-to-express proteins. However, the production of cell lysates is difficult to implement on a larger scale due to large time requirements, cultivation costs, and the supplementation of cell-free reactions with energy regeneration systems. Consequently, the methylotrophic yeast Pichia pastoris, which is widely used in recombinant protein production, was utilized in the present study to realize cell-free synthesis in a cost-effective manner. Sensitive disruption conditions were evaluated, and appropriate signal sequences for translocation into ER vesicles were identified. An alternative energy regeneration system based on fructose-1,6-bisphosphate was developed and a ~2-fold increase in protein production was observed. Using a statistical experiment design, the optimal composition of the cell-free reaction milieu was determined. Moreover, functional ion channels could be produced, and a G-protein-coupled receptor was site-specifically modified using the novel cell-free system. Finally, the established P. pastoris cell-free protein production system can economically produce complex proteins for biotechnological applications in a short time.
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Affiliation(s)
- Jeffrey L. Schloßhauer
- Fraunhofer Project Group PZ-Syn of the Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Located at the Institute of Biotechnology, Brandenburg University of Technology Cottbus-Senftenberg, 01968 Senftenberg, Germany
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Am Mühlenberg, 14476 Potsdam, Germany (S.K.)
- Laboratory of Protein Biochemistry, Institute for Chemistry and Biochemistry, Freie Universität Berlin, Thielallee 63, 14195 Berlin, Germany
| | - Srujan Kumar Dondapati
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Am Mühlenberg, 14476 Potsdam, Germany (S.K.)
| | - Stefan Kubick
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Am Mühlenberg, 14476 Potsdam, Germany (S.K.)
- Laboratory of Protein Biochemistry, Institute for Chemistry and Biochemistry, Freie Universität Berlin, Thielallee 63, 14195 Berlin, Germany
- Faculty of Health Sciences, Joint Faculty of the Brandenburg University of Technology Cottbus-Senftenberg, The Brandenburg Medical School Theodor Fontane, University of Potsdam, 14469 Potsdam, Germany
| | - Anne Zemella
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Am Mühlenberg, 14476 Potsdam, Germany (S.K.)
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