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Mayr JC, Rosa LFM, Klinger N, Grosch J, Harnisch F, Spiess AC. Response-Surface-Optimized and Scaled-Up Microbial Electrosynthesis of Chiral Alcohols. ChemSusChem 2020; 13:1808-1816. [PMID: 31951080 PMCID: PMC7187473 DOI: 10.1002/cssc.201903428] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 01/17/2020] [Indexed: 06/10/2023]
Abstract
A variety of enzymes can be easily incorporated and overexpressed within Escherichia coli cells by plasmids, making it an ideal chassis for bioelectrosynthesis. It has recently been demonstrated that microbial electrosynthesis (MES) of chiral alcohols is possible by using genetically modified E. coli with plasmid-incorporated and overexpressed enzymes and methyl viologen as mediator for electron transfer. This model system, using NADPH-dependent alcohol dehydrogenase from Lactobacillus brevis to convert acetophenone into (R)-1-phenylethanol, is assessed by using a design of experiment (DoE) approach. Process optimization is achieved with a 2.4-fold increased yield of 94±7 %, a 3.9-fold increased reaction rate of 324±67 μm h-1 , and a coulombic efficiency of up to 68±7 %, while maintaining an excellent enantioselectivity of >99 %. Subsequent scale-up to 1 L by using electrobioreactors under batch and fed-batch conditions increases the titer of (R)-1-phenylethanol to 12.8±2.0 mm and paves the way to further develop E. coli into a universal chassis for MES in a standard biotechnological process environment.
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Affiliation(s)
- Jeannine C. Mayr
- Institute of Biochemical EngineeringTechnische Universität BraunschweigRebenring 5638106BraunschweigGermany
- Braunschweig Integrated Centre of Systems Biology (BRICS)Technische Universität BraunschweigRebenring 5638106BraunschweigGermany
| | - Luis F. M. Rosa
- Department of Environmental MicrobiologyHelmholtz-Centre for Environmental Research (UFZ)Permoserstrasse 1504318LeipzigGermany
| | - Natalia Klinger
- Institute of Biochemical EngineeringTechnische Universität BraunschweigRebenring 5638106BraunschweigGermany
| | - Jan‐Hendrik Grosch
- Institute of Biochemical EngineeringTechnische Universität BraunschweigRebenring 5638106BraunschweigGermany
- Braunschweig Integrated Centre of Systems Biology (BRICS)Technische Universität BraunschweigRebenring 5638106BraunschweigGermany
- Center of Pharmaceutical Engineering (PVZ)Technische Universität BraunschweigFranz-Liszt-Strasse 35a38106BraunschweigGermany
| | - Falk Harnisch
- Department of Environmental MicrobiologyHelmholtz-Centre for Environmental Research (UFZ)Permoserstrasse 1504318LeipzigGermany
| | - Antje C. Spiess
- Institute of Biochemical EngineeringTechnische Universität BraunschweigRebenring 5638106BraunschweigGermany
- Braunschweig Integrated Centre of Systems Biology (BRICS)Technische Universität BraunschweigRebenring 5638106BraunschweigGermany
- Center of Pharmaceutical Engineering (PVZ)Technische Universität BraunschweigFranz-Liszt-Strasse 35a38106BraunschweigGermany
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Mayr JC, Grosch JH, Hartmann L, Rosa LFM, Spiess AC, Harnisch F. Resting Escherichia coli as Chassis for Microbial Electrosynthesis: Production of Chiral Alcohols. ChemSusChem 2019; 12:1631-1634. [PMID: 30762315 DOI: 10.1002/cssc.201900413] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Indexed: 06/09/2023]
Abstract
Chiral alcohols constitute important building blocks that can be produced enantioselectively by using nicotinamide adenine dinucleotide (phosphate) [NAD(P)H]-dependent oxidoreductases. For NAD(P)H regeneration, electricity delivers the cheapest reduction equivalents. Enzymatic electrosynthesis suffers from cofactor and enzyme instability, whereas microbial electrosynthesis (MES) exploits whole cells. Here, we demonstrate MES by using resting Escherichia coli as biocatalytic chassis for a production platform towards fine chemicals through electric power. This chassis was exemplified for the synthesis of chiral alcohols by using a NADPH-dependent alcohol dehydrogenase from Lactobacillus brevis for synthesis of (R)-1-phenylethanol from acetophenone. The E. coli strain and growth conditions affected the performance. Maximum yields of (39.4±5.7) % at a coulombic efficiency of (50.5±6.0) % with enantiomeric excess >99 % was demonstrated at a rate of (83.5±13.9) μm h-1 , confirming the potential of MES for synthesis of high-value compounds.
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Affiliation(s)
- Jeannine C Mayr
- Institute of Biochemical Engineering, Braunschweig Integrated Centre of Systems Biology (BRICS), Technische Universität Braunschweig, Rebenring 56, 38106, Braunschweig, Germany
| | - Jan-Hendrik Grosch
- Institute of Biochemical Engineering, Braunschweig Integrated Centre of Systems Biology (BRICS), Technische Universität Braunschweig, Rebenring 56, 38106, Braunschweig, Germany
- Center of Pharmaceutical Engineering (PVZ), Technische Universität Braunschweig, Franz-Liszt-Straße 35a, 38106, Braunschweig, Germany
| | - Lena Hartmann
- Institute of Biochemical Engineering, Braunschweig Integrated Centre of Systems Biology (BRICS), Technische Universität Braunschweig, Rebenring 56, 38106, Braunschweig, Germany
| | - Luis F M Rosa
- Department of Environmental Microbiology, Helmholtz-Centre for Environmental Research, UFZ Permoserstraße 15, 04318, Leipzig, Germany
| | - Antje C Spiess
- Institute of Biochemical Engineering, Braunschweig Integrated Centre of Systems Biology (BRICS), Technische Universität Braunschweig, Rebenring 56, 38106, Braunschweig, Germany
- Center of Pharmaceutical Engineering (PVZ), Technische Universität Braunschweig, Franz-Liszt-Straße 35a, 38106, Braunschweig, Germany
| | - Falk Harnisch
- Department of Environmental Microbiology, Helmholtz-Centre for Environmental Research, UFZ Permoserstraße 15, 04318, Leipzig, Germany
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