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Kannchen D, Zabret J, Oworah-Nkruma R, Dyczmons-Nowaczyk N, Wiegand K, Löbbert P, Frank A, Nowaczyk MM, Rexroth S, Rögner M. Remodeling of photosynthetic electron transport in Synechocystis sp. PCC 6803 for future hydrogen production from water. Biochim Biophys Acta Bioenerg 2020; 1861:148208. [PMID: 32339488 DOI: 10.1016/j.bbabio.2020.148208] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Revised: 03/16/2020] [Accepted: 04/14/2020] [Indexed: 02/06/2023]
Abstract
Photosynthetic microorganisms such as the cyanobacterium Synechocystis sp. PCC 6803 (Synechocystis) can be exploited for the light-driven synthesis of valuable compounds. Thermodynamically, it is most beneficial to branch-off photosynthetic electrons at ferredoxin (Fd), which provides electrons for a variety of fundamental metabolic pathways in the cell, with the ferredoxin-NADP+ Oxido-Reductase (FNR, PetH) being the main target. In order to re-direct electrons from Fd to another consumer, the high electron transport rate between Fd and FNR has to be reduced. Based on our previous in vitro experiments, corresponding FNR-mutants at position FNR_K190 (Wiegand, K., et al.: "Rational redesign of the ferredoxin-NADP-oxido-reductase/ferredoxin-interaction for photosynthesis-dependent H2-production". Biochim Biophys Acta, 2018) have been generated in Synechocystis cells to study their impact on the cellular metabolism and their potential for a future hydrogen-producing design cell. Out of two promising candidates, mutation FNR_K190D proved to be lethal due to oxidative stress, while FNR_K190A was successfully generated and characterized: The light induced NADPH formation is clearly impaired in this mutant and it shows also major metabolic adaptations like a higher glucose metabolism as evidenced by quantitative mass spectrometric analysis. These results indicate a high potential for the future use of photosynthetic electrons in engineered design cells - for instance for hydrogen production. They also show substantial differences of interacting proteins in an in vitro environment vs. physiological conditions in whole cells.
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Affiliation(s)
- Daniela Kannchen
- Plant Biochemistry, Faculty of Biology and Biotechnology, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Jure Zabret
- Plant Biochemistry, Faculty of Biology and Biotechnology, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Regina Oworah-Nkruma
- Plant Biochemistry, Faculty of Biology and Biotechnology, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Nina Dyczmons-Nowaczyk
- Plant Biochemistry, Faculty of Biology and Biotechnology, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Katrin Wiegand
- Plant Biochemistry, Faculty of Biology and Biotechnology, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Pia Löbbert
- Plant Biochemistry, Faculty of Biology and Biotechnology, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Anna Frank
- Plant Biochemistry, Faculty of Biology and Biotechnology, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Marc Michael Nowaczyk
- Plant Biochemistry, Faculty of Biology and Biotechnology, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Sascha Rexroth
- Plant Biochemistry, Faculty of Biology and Biotechnology, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Matthias Rögner
- Plant Biochemistry, Faculty of Biology and Biotechnology, Ruhr-University Bochum, 44780 Bochum, Germany.
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Bartsch M, Gassmeyer SK, Köninger K, Igarashi K, Liauw P, Dyczmons-Nowaczyk N, Miyamoto K, Nowaczyk MM, Kourist R. Photosynthetic production of enantioselective biocatalysts. Microb Cell Fact 2015; 14:53. [PMID: 25889799 PMCID: PMC4412116 DOI: 10.1186/s12934-015-0233-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 03/25/2015] [Indexed: 12/30/2022] Open
Abstract
Background Global resource depletion poses a dramatic threat to our society and creates a strong demand for alternative resources that do not compete with the production of food. Meeting this challenge requires a thorough rethinking of all steps of the value chain regarding their sustainability resource demand and the possibility to substitute current, petrol-based supply-chains with renewable resources. This regards also the production of catalysts for chemical synthesis. Phototrophic microorganisms have attracted considerable attention as a biomanufacturing platform for the sustainable production of chemicals and biofuels. They allow the direct utilization of carbon dioxide and do not compete with food production. Photosynthetic enzyme production of catalysts would be a sustainable supply of these important components of the biotechnological and chemical industries. This paper focuses on the usefulness of recombinant cyanobacteria for the photosynthetic expression of enantioselective catalysts. As a proof of concept, we used the cyanobacterium Synechocystis sp. PCC 6803 for the heterologous expression of two highly enantioselective enzymes. Results We investigated the expression yield and the usefulness of cyanobacterial cell extracts for conducting stereoselective reactions. The cyanobacterial enzyme expression achieved protein yields of 3% of total soluble protein (%TSP) while the expression in E. coli yielded 6-8% TSP. Cell-free extracts from a recombinant strain expressing the recombinant esterase ST0071 from the thermophilic organism Sulfolobus tokodai ST0071 and arylmalonate decarboxylase from Bordetella bronchiseptica showed excellent enantioselectivity (>99% ee) and yield (>91%) in the desymmetrisation of prochiral malonates. Conclusions We were able to present the proof-of-concept of photoautotrophic enzyme expression as a viable alternative to heterotrophic expression hosts. Our results show that the introduction of foreign genes is straightforward. Cell components from Synechocystis did not interfere with the stereoselective transformations, underlining the usability of photoautotrophic organisms for the production of enzymes. Given the considerable commercial value of recombinant biocatalysts, cyanobacterial enzyme expression has thus the potential to complement existing approaches to use phototrophic organisms for the production of chemicals and biofuels.
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Affiliation(s)
- Maik Bartsch
- Junior Research Group for Microbial Biotechnology, Ruhr-Universität Bochum, Universitätsstr. 150, 44780, Bochum, Germany.
| | - Sarah K Gassmeyer
- Junior Research Group for Microbial Biotechnology, Ruhr-Universität Bochum, Universitätsstr. 150, 44780, Bochum, Germany.
| | - Katharina Köninger
- Junior Research Group for Microbial Biotechnology, Ruhr-Universität Bochum, Universitätsstr. 150, 44780, Bochum, Germany.
| | - Kosuke Igarashi
- Department of Biosciences and Informatics, Keio University, 3-14-1 Hiyoshi, Yokohama, 223-8522, Japan.
| | - Pasqual Liauw
- Chair for Plant Biochemistry, Ruhr-Universität Bochum, Universitätsstr. 150, 44780, Bochum, Germany.
| | - Nina Dyczmons-Nowaczyk
- Chair for Plant Biochemistry, Ruhr-Universität Bochum, Universitätsstr. 150, 44780, Bochum, Germany.
| | - Kenji Miyamoto
- Department of Biosciences and Informatics, Keio University, 3-14-1 Hiyoshi, Yokohama, 223-8522, Japan.
| | - Marc M Nowaczyk
- Department of Biosciences and Informatics, Keio University, 3-14-1 Hiyoshi, Yokohama, 223-8522, Japan.
| | - Robert Kourist
- Junior Research Group for Microbial Biotechnology, Ruhr-Universität Bochum, Universitätsstr. 150, 44780, Bochum, Germany.
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Liauw P, Kannchen D, Gasper R, Dyczmons-Nowaczyk N, Nowaczyk MM, Hofmann E. Cloning, expression, crystallization and preliminary X-ray studies of a superfolder GFP fusion of cyanobacterial Psb32. Acta Crystallogr F Struct Biol Commun 2015; 71:409-13. [PMID: 25849501 DOI: 10.1107/s2053230x15003970] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 02/25/2015] [Indexed: 11/10/2022]
Abstract
A fusion of Psb32 from the thermophilic cyanobacterium Thermosynechococcus elongatus BP-1 (TePsb32) with superfolder GFP was created for enhanced solubility and improved detection and purification. The fusion protein readily formed large hexagonal crystals belonging to space group P6₁22. A full data set extending to 2.3 Å resolution was collected at the Swiss Light Source. The phase problem could be solved by using only the sfGFP fusion partner or by using GFP and AtTLP18.3 from Arabidopsis thaliana as search models. Based on this expression construct, a versatile library of 24 vectors combining four different superfolder GFP variants and three affinity tags was generated to facilitate expression and screening of fluorescent fusion proteins.
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Affiliation(s)
- Pasqual Liauw
- Department of Plant Biochemistry, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Daniela Kannchen
- Department of Plant Biochemistry, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Raphael Gasper
- Department of Biophysics, Ruhr-University Bochum, 44780 Bochum, Germany
| | | | - Marc M Nowaczyk
- Department of Plant Biochemistry, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Eckhard Hofmann
- Department of Biophysics, Ruhr-University Bochum, 44780 Bochum, Germany
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