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Schelch S, Eibinger M, Zuson J, Kuballa J, Nidetzky B. Modular bioengineering of whole-cell catalysis for sialo-oligosaccharide production: coordinated co-expression of CMP-sialic acid synthetase and sialyltransferase. Microb Cell Fact 2023; 22:241. [PMID: 38012629 PMCID: PMC10683312 DOI: 10.1186/s12934-023-02249-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 11/12/2023] [Indexed: 11/29/2023] Open
Abstract
BACKGROUND In whole-cell bio-catalysis, the biosystems engineering paradigm shifts from the global reconfiguration of cellular metabolism as in fermentation to a more focused, and more easily modularized, optimization of comparably short cascade reactions. Human milk oligosaccharides (HMO) constitute an important field for the synthetic application of cascade bio-catalysis in resting or non-living cells. Here, we analyzed the central catalytic module for synthesis of HMO-type sialo-oligosaccharides, comprised of CMP-sialic acid synthetase (CSS) and sialyltransferase (SiaT), with the specific aim of coordinated enzyme co-expression in E. coli for reaction flux optimization in whole cell conversions producing 3'-sialyllactose (3SL). RESULTS Difference in enzyme specific activity (CSS from Neisseria meningitidis: 36 U/mg; α2,3-SiaT from Pasteurella dagmatis: 5.7 U/mg) was compensated by differential protein co-expression from tailored plasmid constructs, giving balance between the individual activities at a high level of both (α2,3-SiaT: 9.4 × 102 U/g cell dry mass; CSS: 3.4 × 102 U/g cell dry mass). Finally, plasmid selection was guided by kinetic modeling of the coupled CSS-SiaT reactions in combination with comprehensive analytical tracking of the multistep conversion (lactose, N-acetyl neuraminic acid (Neu5Ac), cytidine 5'-triphosphate; each up to 100 mM). The half-life of SiaT in permeabilized cells (≤ 4 h) determined the efficiency of 3SL production at 37 °C. Reaction at 25 °C gave 3SL (40 ± 4 g/L) in ∼ 70% yield within 3 h, reaching a cell dry mass-specific productivity of ∼ 3 g/(g h) and avoiding intermediary CMP-Neu5Ac accumulation. CONCLUSIONS Collectively, balanced co-expression of CSS and SiaT yields an efficient (high-flux) sialylation module to support flexible development of E. coli whole-cell catalysts for sialo-oligosaccharide production.
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Affiliation(s)
- Sabine Schelch
- Austrian Centre of Industrial Biotechnology, Krenngasse 37, 8010, Graz, Austria
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, Petersgasse 12, 8010, Graz, Austria
| | - Manuel Eibinger
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, Petersgasse 12, 8010, Graz, Austria
| | - Jasmin Zuson
- Austrian Centre of Industrial Biotechnology, Krenngasse 37, 8010, Graz, Austria
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, Petersgasse 12, 8010, Graz, Austria
| | - Jürgen Kuballa
- GALAB Laboratories GmbH, Am Schleusengraben 7, 21029, Hamburg, Germany
| | - Bernd Nidetzky
- Austrian Centre of Industrial Biotechnology, Krenngasse 37, 8010, Graz, Austria.
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, Petersgasse 12, 8010, Graz, Austria.
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Khobragade TP, Giri P, Pagar AD, Patil MD, Sarak S, Joo S, Goh Y, Jung S, Yoon H, Yun S, Kwon Y, Yun H. Dual-function transaminases with hybrid nanoflower for the production of value-added chemicals from biobased levulinic acid. Front Bioeng Biotechnol 2023; 11:1280464. [PMID: 38033815 PMCID: PMC10687574 DOI: 10.3389/fbioe.2023.1280464] [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: 08/20/2023] [Accepted: 10/30/2023] [Indexed: 12/02/2023] Open
Abstract
The U.S. Department of Energy has listed levulinic acid (LA) as one of the top 12 compounds derived from biomass. LA has gained much attention owing to its conversion into enantiopure 4-aminopentanoic acid through an amination reaction. Herein, we developed a coupled-enzyme recyclable cascade employing two transaminases (TAs) for the synthesis of (S)-4-aminopentanoic acid. TAs were first utilized to convert LA into (S)-4-aminopentanoic acid using (S)-α-Methylbenzylamine [(S)-α-MBA] as an amino donor. The deaminated (S)-α-MBA i.e., acetophenone was recycled back using a second TAs while using isopropyl amine (IPA) amino donor to generate easily removable acetone. Enzymatic reactions were carried out using different systems, with conversions ranging from 30% to 80%. Furthermore, the hybrid nanoflowers (HNF) of the fusion protein were constructed which afforded complete biocatalytic conversion of LA to the desired (S)-4-aminopentanoic acid. The created HNF demonstrated storage stability for over a month and can be reused for up to 7 sequential cycles. A preparative scale reaction (100 mL) achieved the complete conversion with an isolated yield of 62%. Furthermore, the applicability of this recycling system was tested with different β-keto ester substrates, wherein 18%-48% of corresponding β-amino acids were synthesized. Finally, this recycling system was applied for the biosynthesis of pharmaceutical important drug sitagliptin intermediate ((R)-3-amino-4-(2,4,5-triflurophenyl) butanoic acid) with an excellent conversion 82%.
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Affiliation(s)
- Taresh P. Khobragade
- Department of Systems Biotechnology, Konkuk University, Seoul, Republic of Korea
| | - Pritam Giri
- Department of Systems Biotechnology, Konkuk University, Seoul, Republic of Korea
| | - Amol D. Pagar
- Department of Systems Biotechnology, Konkuk University, Seoul, Republic of Korea
| | - Mahesh D. Patil
- Department of Nanomaterials and Application Technology, Center of Innovative and Applied Bioprocessing (CIAB), Mohali, Punjab, India
| | - Sharad Sarak
- Department of Systems Biotechnology, Konkuk University, Seoul, Republic of Korea
| | - Sangwoo Joo
- Department of Systems Biotechnology, Konkuk University, Seoul, Republic of Korea
| | - Younghwan Goh
- Department of Systems Biotechnology, Konkuk University, Seoul, Republic of Korea
| | - Seohee Jung
- Department of Systems Biotechnology, Konkuk University, Seoul, Republic of Korea
| | - Hyunseok Yoon
- Department of Systems Biotechnology, Konkuk University, Seoul, Republic of Korea
| | - Subin Yun
- Department of Systems Biotechnology, Konkuk University, Seoul, Republic of Korea
| | - Youkyoung Kwon
- Department of Systems Biotechnology, Konkuk University, Seoul, Republic of Korea
| | - Hyungdon Yun
- Department of Systems Biotechnology, Konkuk University, Seoul, Republic of Korea
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Xue C, Ng IS. A direct enzymatic evaluation platform (DEEP) to fine-tuning pyridoxal 5'-phosphate-dependent proteins for cadaverine production. Biotechnol Bioeng 2023; 120:272-283. [PMID: 36271696 DOI: 10.1002/bit.28270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 10/06/2022] [Accepted: 10/17/2022] [Indexed: 11/11/2022]
Abstract
Pyridoxal 5'-phosphate (pyridoxal phosphate, PLP) is an essential cofactor for multiple enzymatic reactions in industry. However, cofactor engineering based on PLP regeneration and related to the performance of enzymes in chemical production has rarely been discussed. First, we found that MG1655 strain was sensitive to nitrogen source and relied on different amino acids, thus the biomass was significantly reduced when PLP excess in the medium. Then, the six KEIO collection strains were applied to find out the prominent gene in deoxyxylulose-5-phosphate (DXP) pathway, where pdxB was superior in controlling cell growth. Therefore, the clustered regularly interspaced short palindromic repeats interference (CRISPRi) targeted on pdxB in MG1655 was employed to establish a novel direct enzymatic evaluation platform (DEEP) as a high-throughput tool and obtained the optimal modules for incorporating of PLP to enhance the biomass and activity of PLP-dependent enzymes simultaneously. As a result, the biomass has increased by 55% using PlacI promoter driven pyridoxine 5'-phosphate oxidase (PdxH) with a trace amount of precursor. When the strains incorporated DEEP and lysine decarboxylase (CadA), the cadaverine productivity was increased 32% due to the higher expression of CadA. DEEP is not only feasible for high-throughput screening of the best chassis for PLP engineering but also practical in fine-tuning the quantity and quality of enzymes.
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Affiliation(s)
- Chengfeng Xue
- Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan
| | - I-Son Ng
- Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan
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Jeon H, Pagar AD, Kang H, Giri P, Nadarajan SP, Sarak S, Khobragade TP, Lim S, Patil MD, Lee SG, Yun H. Creation of a ( R)-β-Transaminase by Directed Evolution of d-Amino Acid Aminotransferase. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hyunwoo Jeon
- Department of Systems Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
| | - Amol D. Pagar
- Department of Systems Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
| | - Hyeona Kang
- Department of Chemical and Biomolecular Engineering, Pusan National University, 63 Busan Daehak-ro, Beon-gil, Busan 46241, Korea
| | - Pritam Giri
- Department of Systems Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
| | - Saravanan P. Nadarajan
- Department of Systems Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
| | - Sharad Sarak
- Department of Systems Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
| | - Taresh P. Khobragade
- Department of Systems Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
| | - Seonga Lim
- Department of Systems Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
| | - Mahesh D. Patil
- Department of Nanomaterials and Application Technology, Center of Innovative and Applied Bioprocessing (CIAB), Sector-81, PO Manauli, S.A.S. Nagar, Mohali, Punjab 140306, India
| | - Sun-Gu Lee
- Department of Chemical and Biomolecular Engineering, Pusan National University, 63 Busan Daehak-ro, Beon-gil, Busan 46241, Korea
| | - Hyungdon Yun
- Department of Systems Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
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5
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Roda S, Fernandez-Lopez L, Benedens M, Bollinger A, Thies S, Schumacher J, Coscolín C, Kazemi M, Santiago G, Gertzen CGW, Gonzalez-Alfonso JL, Plou FJ, Jaeger KE, Smits SHJ, Ferrer M, Guallar V. A Plurizyme with Transaminase and Hydrolase Activity Catalyzes Cascade Reactions. Angew Chem Int Ed Engl 2022; 61:e202207344. [PMID: 35734849 PMCID: PMC9540564 DOI: 10.1002/anie.202207344] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Indexed: 01/01/2023]
Abstract
Engineering dual‐function single polypeptide catalysts with two abiotic or biotic catalytic entities (or combinations of both) supporting cascade reactions is becoming an important area of enzyme engineering and catalysis. Herein we present the development of a PluriZyme, TR2E2, with efficient native transaminase (kcat: 69.49±1.77 min−1) and artificial esterase (kcat: 3908–0.41 min−1) activities integrated into a single scaffold, and evaluate its utility in a cascade reaction. TR2E2 (pHopt: 8.0–9.5; Topt: 60–65 °C) efficiently converts methyl 3‐oxo‐4‐(2,4,5‐trifluorophenyl)butanoate into 3‐(R)‐amino‐4‐(2,4,5‐trifluorophenyl)butanoic acid, a crucial intermediate for the synthesis of antidiabetic drugs. The reaction proceeds through the conversion of the β‐keto ester into the β‐keto acid at the hydrolytic site and subsequently into the β‐amino acid (e.e. >99 %) at the transaminase site. The catalytic power of the TR2E2PluriZyme was proven with a set of β‐keto esters, demonstrating the potential of such designs to address bioinspired cascade reactions.
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Affiliation(s)
- Sergi Roda
- Department of Life Sciences, Barcelona Supercomputing Center, Carrer de Jordi Girona, 31, 08034, Barcelona, Spain
| | | | - Marius Benedens
- Center for Structural Studies, Heinrich-Heine-University, Building 26.44.01.62, Universitaetsstr 1, 40228, Duesseldorf, Germany
| | - Alexander Bollinger
- Institute of Molecular Enzyme Technology, Heinrich-Heine-Universität Düsseldorf, Building 26.44.01.62, Universitaetsstr 1, 40228, Duesseldorf, Germany.,Forschungszentrum Jülich, Building 15.8, 01/303, 52428, Wilhelm Johnen Straße, Jülich, Germany
| | - Stephan Thies
- Institute of Molecular Enzyme Technology, Heinrich-Heine-Universität Düsseldorf, Building 26.44.01.62, Universitaetsstr 1, 40228, Duesseldorf, Germany.,Forschungszentrum Jülich, Building 15.8, 01/303, 52428, Wilhelm Johnen Straße, Jülich, Germany
| | - Julia Schumacher
- Center for Structural Studies, Heinrich-Heine-University, Building 26.44.01.62, Universitaetsstr 1, 40228, Duesseldorf, Germany
| | - Cristina Coscolín
- Department of Applied Biocatalysis, ICP, CSIC, Marie Curie 2, 28049, Madrid, Spain
| | - Masoud Kazemi
- Department of Life Sciences, Barcelona Supercomputing Center, Carrer de Jordi Girona, 31, 08034, Barcelona, Spain
| | - Gerard Santiago
- Department of Life Sciences, Barcelona Supercomputing Center, Carrer de Jordi Girona, 31, 08034, Barcelona, Spain
| | - Christoph G W Gertzen
- Center for Structural Studies, Heinrich-Heine-University, Building 26.44.01.62, Universitaetsstr 1, 40228, Duesseldorf, Germany
| | | | - Francisco J Plou
- Department of Applied Biocatalysis, ICP, CSIC, Marie Curie 2, 28049, Madrid, Spain
| | - Karl-Erich Jaeger
- Institute of Molecular Enzyme Technology, Heinrich-Heine-Universität Düsseldorf, Building 26.44.01.62, Universitaetsstr 1, 40228, Duesseldorf, Germany.,Forschungszentrum Jülich, Building 15.8, 01/303, 52428, Wilhelm Johnen Straße, Jülich, Germany
| | - Sander H J Smits
- Center for Structural Studies, Heinrich-Heine-University, Building 26.44.01.62, Universitaetsstr 1, 40228, Duesseldorf, Germany
| | - Manuel Ferrer
- Department of Applied Biocatalysis, ICP, CSIC, Marie Curie 2, 28049, Madrid, Spain
| | - Víctor Guallar
- Department of Life Sciences, Barcelona Supercomputing Center, Carrer de Jordi Girona, 31, 08034, Barcelona, Spain.,Institució Catalana de Recerca i Estudis Avançats, Passeig de Lluís Companys, 23, 08010, Barcelona, Spain
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6
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Roda S, Fernandez-Lopez L, Benedens M, Bollinger A, Thies S, Schumacher J, Coscolín C, Kazemi M, Santiago G, Gertzen CGW, Gonzalez-Alfonso JL, Plou FJ, Jaeger KE, Smits SHJ, Ferrer M, Guallar V. A Plurizyme with Transaminase and Hydrolase Activity Catalyzes Cascade Reactions. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202207344] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Sergi Roda
- Barcelona Supercomputing Center: Centro Nacional de Supercomputacion Department of Life Sciences Carrer de Jordi Girona, 31 08034 Barcelona SPAIN
| | - Laura Fernandez-Lopez
- ICP: Instituto de Catalisis y Petroleoquimica Department of Applied Biocatalysis Marie Curie 2 28049 Madrid SPAIN
| | - Marius Benedens
- Heinrich-Heine-Universität Düsseldorf: Heinrich-Heine-Universitat Dusseldorf Center for Structural Studies Wilhelm Johnen Straße, Bldg 15.8, 01/303 40228 Düsseldorf GERMANY
| | - Alexander Bollinger
- Forschungszentrum Jülich: Forschungszentrum Julich GmbH Institute of Molecular Enzyme Technology Wilhelm Johnen Straße, Bldg 15.8, 01/303 52428 Jülich GERMANY
| | - Stephan Thies
- Forschungszentrum Jülich: Forschungszentrum Julich GmbH Institute of Molecular Enzyme Technology Wilhelm Johnen Straße, Bldg 15.8, 01/303 52428 Jülich GERMANY
| | - Julia Schumacher
- Heinrich-Heine-Universitat Dusseldorf Center for Structural Studies Building 26.44.01.62, Universitaetsstr 1 40228 Düsseldorf GERMANY
| | - Cristina Coscolín
- ICP: Instituto de Catalisis y Petroleoquimica Department of Applied Biocatalysis Marie Curie 28049 Madrid SPAIN
| | - Masoud Kazemi
- Barcelona Supercomputing Center: Centro Nacional de Supercomputacion Department of Life Sciences Carrer de Jordi Girona, 31 08034 Barcelona SPAIN
| | - Gerard Santiago
- Barcelona Supercomputing Center: Centro Nacional de Supercomputacion Department of Life Sciences Carrer de Jordi Girona, 31 08034 Barcelona SPAIN
| | - Christoph G. W. Gertzen
- Heinrich Heine University Düsseldorf: Heinrich-Heine-Universitat Dusseldorf Institute for Pharmaceutical and Medicinal Chemistry 40228 Düsseldorf GERMANY
| | - Jose L. Gonzalez-Alfonso
- ICP: Instituto de Catalisis y Petroleoquimica Department of Applied Biocatalysis Marie Curie 2 28049 Madrid SPAIN
| | - Francisco J. Plou
- ICP: Instituto de Catalisis y Petroleoquimica Department of Applied Biocatalysis Marie Curie 2 28049 Madrid SPAIN
| | - Karl-Erich Jaeger
- Forschungszentrum Julich ICG: Forschungszentrum Julich GmbH Institute of Molecular Enzyme Technology Wilhelm Johnen Straße, Bldg 15.8, 01/303 52428 Jülich GERMANY
| | - Sander H. J. Smits
- Heinrich Heine University Düsseldorf: Heinrich-Heine-Universitat Dusseldorf Center for Structural Studies 40228 Düsseldorf GERMANY
| | - Manuel Ferrer
- Institute of Catalysis CSIC Department of Biocatalysis Marie Curie 2Campus Cantoblanco 28049 Madrid SPAIN
| | - Víctor Guallar
- Barcelona Supercomputing Center: Centro Nacional de Supercomputacion Department of Life Sciences Carrer de Jordi Girona, 31 08034 Barcelona SPAIN
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Schwaiger KN, Voit A, Wiltschi B, Nidetzky B. Engineering cascade biocatalysis in whole cells for bottom-up synthesis of cello-oligosaccharides: flux control over three enzymatic steps enables soluble production. Microb Cell Fact 2022; 21:61. [PMID: 35397553 PMCID: PMC8994397 DOI: 10.1186/s12934-022-01781-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 03/24/2022] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Soluble cello-oligosaccharides (COS, β-1,4-D-gluco-oligosaccharides with degree of polymerization DP 2-6) have been receiving increased attention in different industrial sectors, from food and feed to cosmetics. Development of large-scale COS applications requires cost-effective technologies for their production. Cascade biocatalysis by the three enzymes sucrose-, cellobiose- and cellodextrin phosphorylase is promising because it enables bottom-up synthesis of COS from expedient substrates such as sucrose and glucose. A whole-cell-derived catalyst that incorporates the required enzyme activities from suitable co-expression would represent an important step towards making the cascade reaction fit for production. Multi-enzyme co-expression to reach distinct activity ratios is challenging in general, but it requires special emphasis for the synthesis of COS. Only a finely tuned balance between formation and elongation of the oligosaccharide precursor cellobiose results in the desired COS. RESULTS Here, we show the integration of cellodextrin phosphorylase into a cellobiose-producing whole-cell catalyst. We arranged the co-expression cassettes such that their expression levels were upregulated. The most effective strategy involved a custom vector design that placed the coding sequences for cellobiose phosphorylase (CbP), cellodextrin phosphorylase (CdP) and sucrose phosphorylase (ScP) in a tricistron in the given order. The expression of the tricistron was controlled by the strong T7lacO promoter and strong ribosome binding sites (RBS) for each open reading frame. The resulting whole-cell catalyst achieved a recombinant protein yield of 46% of total intracellular protein in an optimal ScP:CbP:CdP activity ratio of 10:2.9:0.6, yielding an overall activity of 315 U/g dry cell mass. We demonstrated that bioconversion catalyzed by a semi-permeabilized whole-cell catalyst achieved an industrial relevant COS product titer of 125 g/L and a space-time yield of 20 g/L/h. With CbP as the cellobiose providing enzyme, flux into higher oligosaccharides (DP ≥ 6) was prevented and no insoluble products were formed after 6 h of conversion. CONCLUSIONS A whole-cell catalyst for COS biosynthesis was developed. The coordinated co-expression of the three biosynthesis enzymes balanced the activities of the individual enzymes such that COS production was maximized. With the flux control set to minimize the share of insolubles in the product, the whole-cell synthesis shows a performance with respect to yield, productivity, product concentration and quality that is promising for industrial production.
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Affiliation(s)
- Katharina N. Schwaiger
- grid.432147.70000 0004 0591 4434ACIB-Austrian Centre of Industrial Biotechnology, Krenngasse 37, 8010 Graz, Austria
| | - Alena Voit
- grid.432147.70000 0004 0591 4434ACIB-Austrian Centre of Industrial Biotechnology, Krenngasse 37, 8010 Graz, Austria
| | - Birgit Wiltschi
- grid.432147.70000 0004 0591 4434ACIB-Austrian Centre of Industrial Biotechnology, Krenngasse 37, 8010 Graz, Austria
| | - Bernd Nidetzky
- grid.432147.70000 0004 0591 4434ACIB-Austrian Centre of Industrial Biotechnology, Krenngasse 37, 8010 Graz, Austria ,grid.410413.30000 0001 2294 748XInstitute of Biotechnology and Biochemical Engineering, NAWI Graz, Graz University of Technology, Petersgasse 12, 8010 Graz, Austria
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Khobragade TP, Sarak S, Pagar AD, Jeon H, Giri P, Yun H. Synthesis of Sitagliptin Intermediate by a Multi-Enzymatic Cascade System Using Lipase and Transaminase With Benzylamine as an Amino Donor. Front Bioeng Biotechnol 2021; 9:757062. [PMID: 34692666 PMCID: PMC8526967 DOI: 10.3389/fbioe.2021.757062] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 09/21/2021] [Indexed: 01/30/2023] Open
Abstract
Herein, we report the development of a multi-enzyme cascade using transaminase (TA), esterase, aldehyde reductase (AHR), and formate dehydrogenase (FDH), using benzylamine as an amino donor to synthesize the industrially important compound sitagliptin intermediate. A panel of 16 TAs was screened using ethyl 3-oxo-4-(2,4,5-trifluorophenyl) butanoate as a substrate (1). Amongst these enzymes, TA from Roseomonas deserti (TARO) was found to be the most suitable, showing the highest activity towards benzylamine (∼70%). The inhibitory effect of benzaldehyde was resolved by using AHR from Synechocystis sp. and FDH from Pseudomonas sp., which catalyzed the conversion of benzaldehyde to benzyl alcohol at the expense of NAD(P)H. Reaction parameters, such as pH, buffer system, and concentration of amino donor, were optimized. A single whole-cell system was developed for co-expressing TARO and esterase, and the promoter engineering strategy was adopted to control the expression level of each biocatalyst. The whole-cell reactions were performed with varying substrate concentrations (10-100 mM), resulting in excellent conversions (ranging from 72 to 91%) into the desired product. Finally, the applicability of this cascade was highlighted on Gram scale, indicating production of 70% of the sitagliptin intermediate with 61% isolated yield. The protocol reported herein may be considered an alternative to existing methods with respect to the use of cheaper amine donors as well as improved synthesis of (R) and (S) enantiomers with the use of non-chiral amino donors.
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Affiliation(s)
| | | | | | | | | | - Hyungdon Yun
- Department of Systems Biotechnology, Konkuk University, Seoul, South Korea
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