1
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Zhu P, Zhang C, Chen J, Zeng X. Multilevel systemic engineering of Bacillus licheniformis for efficient production of acetoin from lignocellulosic hydrolysates. Int J Biol Macromol 2024; 279:135142. [PMID: 39208901 DOI: 10.1016/j.ijbiomac.2024.135142] [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: 02/16/2024] [Revised: 08/20/2024] [Accepted: 08/26/2024] [Indexed: 09/04/2024]
Abstract
Bio-refining lignocellulosic resource offers a renewable and sustainable approach for producing biofuels and biochemicals. However, the conversion efficiency of lignocellulosic resource is still challenging due to the intrinsic inefficiency in co-utilization of xylose and glucose. In this study, the industrial bacterium Bacillus licheniformis was engineered for biorefining lignocellulosic resource to produce acetoin. First, adaptive evolution was conducted to improve acetoin tolerance, leading to a 19.6 % increase in acetoin production. Then, ARTP mutagenesis and 60Co-γ irradiation was carried out to enhance the production of acetoin, obtaining 73.0 g/L acetoin from glucose. Further, xylose uptake and xylose utilization pathway were rewired to facilitate the co-utilization of xylose and glucose, enabling the production of 60.6 g/L acetoin from glucose and xylose mixtures. Finally, this efficient cell factory was utilized for acetoin production from lignocellulosic hydrolysates with the highest titer of 68.3 g/L in fed-batch fermentation. This strategy described here holds great applied potential in the biorefinery of lignocellulose for the efficient synthesis of high-value chemicals.
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Affiliation(s)
- Pan Zhu
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, China.
| | - Chen Zhang
- School of Life Sciences, Huaibei Normal University, Huaibei 235000, China
| | - Jiaying Chen
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, China
| | - Xin Zeng
- School of Life Sciences, Huaibei Normal University, Huaibei 235000, China.
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2
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Luo H, Liu W, Luo Y, Tu Z, Liu B, Yang J. Whole-Cell Biocatalytic Production of Acetoin with an aldC-Overexpressing Lactococcus lactis Using Soybean as Substrate. Foods 2023; 12:foods12061317. [PMID: 36981243 PMCID: PMC10048662 DOI: 10.3390/foods12061317] [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: 02/07/2023] [Revised: 03/09/2023] [Accepted: 03/17/2023] [Indexed: 03/30/2023] Open
Abstract
Douchi is a traditional Chinese fermented soybean product, in which acetoin is a key flavor substance. Here, the α-acetolactate decarboxylase gene aldC was cloned from Lactiplantibacillus (L.) plantarum and overexpressed in Lactococcus (L.) lactis NZ9000 by nisin induction. The ALDC crude enzyme solution produced an enzyme activity of 35.16 mU. Next, whole cells of the recombinant strain NZ9000/pNZ8048-aldC were employed as the catalyst to produce acetoin in GM17 medium. An optimization experiment showed that an initial OD600 of 0.6, initial pH of 7.5, nisin concentration of 20 ng/mL, induction temperature of 37 °C and static induction for 8 h were the optimal induction conditions, generating the maximum acetoin production (106.93 mg/L). Finally, after incubation under the optimal induction conditions, NZ9000/pNZ8048-aldC was used for whole-cell biocatalytic acetoin production, using soybean as the substrate. The maximum acetoin yield was 79.43 mg/L. To our knowledge, this is the first study in which the aldC gene is overexpressed in L. lactis and whole cells of the recombinant L. lactis are used as a biocatalyst to produce acetoin in soybean. Thus, our study provides a theoretical basis for the preparation of fermented foods containing high levels of acetoin and the biosynthesis of acetoin in food materials.
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Affiliation(s)
- Huajun Luo
- National R&D Center for Freshwater Fish Processing, College of Life Sciences, Jiangxi Normal University, Nanchang 330022, China
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Weihong Liu
- National R&D Center for Freshwater Fish Processing, College of Life Sciences, Jiangxi Normal University, Nanchang 330022, China
| | - Yiyong Luo
- National R&D Center for Freshwater Fish Processing, College of Life Sciences, Jiangxi Normal University, Nanchang 330022, China
| | - Zongcai Tu
- National R&D Center for Freshwater Fish Processing, College of Life Sciences, Jiangxi Normal University, Nanchang 330022, China
| | - Biqin Liu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Juan Yang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
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3
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Mengers HG, Guntermann N, Graf von Westarp W, Jupke A, Klankermayer J, Blank LM, Leitner W, Rother D. Three Sides of the Same Coin: Combining Microbial, Enzymatic, and Organometallic Catalysis for Integrated Conversion of Renewable Carbon Sources. CHEM-ING-TECH 2022. [DOI: 10.1002/cite.202200169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Hendrik G. Mengers
- RWTH Aachen University Institute of Applied Microbiology – iAMB, Aachen Biology and Biotechnology – ABBt Worringerweg 1 52074 Aachen Germany
| | - Nils Guntermann
- RWTH Aachen University Institute of Macromolecular Chemistry – ITMC Worringerweg 2 52074 Aachen Germany
| | - William Graf von Westarp
- RWTH Aachen University Fluid Process Engineering – AVT.FVT Forckenbeckstraße 51 52074 Aachen Germany
| | - Andreas Jupke
- RWTH Aachen University Fluid Process Engineering – AVT.FVT Forckenbeckstraße 51 52074 Aachen Germany
| | - Jürgen Klankermayer
- RWTH Aachen University Institute of Macromolecular Chemistry – ITMC Worringerweg 2 52074 Aachen Germany
| | - Lars M. Blank
- RWTH Aachen University Institute of Applied Microbiology – iAMB, Aachen Biology and Biotechnology – ABBt Worringerweg 1 52074 Aachen Germany
| | - Walter Leitner
- RWTH Aachen University Institute of Macromolecular Chemistry – ITMC Worringerweg 2 52074 Aachen Germany
- Max Planck Institute for Chemical Energy Conversion Stiftstraße 34–36 45470 Mülheim a. d. Ruhr Germany
| | - Dörte Rother
- Forschungzentrum Jülich GmbH Institute of Bio- and Geosciences: Biotechnology Wilhelm-Johnen-Straße 52425 Jülich Germany
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4
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Meng W, Ma C, Xu P, Gao C. Biotechnological production of chiral acetoin. Trends Biotechnol 2022; 40:958-973. [DOI: 10.1016/j.tibtech.2022.01.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 01/13/2022] [Accepted: 01/13/2022] [Indexed: 11/28/2022]
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5
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Cui Z, Wang Z, Zheng M, Chen T. Advances in biological production of acetoin: a comprehensive overview. Crit Rev Biotechnol 2021; 42:1135-1156. [PMID: 34806505 DOI: 10.1080/07388551.2021.1995319] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Acetoin, a high-value-added bio-based platform chemical, is widely used in foods, cosmetics, agriculture, and the chemical industry. It is an important precursor for the synthesis of: 2,3-butanediol, liquid hydrocarbon fuels and heterocyclic compounds. Since the fossil resources are becoming increasingly scarce, biological production of acetoin has received increasing attention as an alternative to chemical synthesis. Although there are excellent reviews on the: application, catabolism and fermentative production of acetoin, little attention has been paid to acetoin production via: electrode-assisted fermentation, whole-cell biocatalysis, and in vitro/cell-free biocatalysis. In this review, acetoin biosynthesis pathways and relevant key enzymes are firstly reviewed. In addition, various strategies for biological acetoin production are summarized including: cell-free biocatalysis, whole-cell biocatalysis, microbial fermentation, and electrode-assisted fermentation. The advantages and disadvantages of the different approaches are discussed and weighed, illustrating the increasing progress toward economical, green and efficient production of acetoin. Additionally, recent advances in acetoin extraction and recovery in downstream processing are also briefly reviewed. Moreover, the current issues and future prospects of diverse strategies for biological acetoin production are discussed, with the hope of realizing the promises of industrial acetoin biomanufacturing in the near future.
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Affiliation(s)
- Zhenzhen Cui
- Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China.,Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (MOE), School of Chemical Engineering and Technology, Tianjin University, Tianjin, China.,SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, China
| | - Zhiwen Wang
- Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China.,Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (MOE), School of Chemical Engineering and Technology, Tianjin University, Tianjin, China.,SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, China
| | - Meiyu Zheng
- Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China.,Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (MOE), School of Chemical Engineering and Technology, Tianjin University, Tianjin, China.,SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, China
| | - Tao Chen
- Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China.,Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (MOE), School of Chemical Engineering and Technology, Tianjin University, Tianjin, China.,SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, China
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6
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Sadler JC, Dennis JA, Johnson NW, Wallace S. Interfacing non-enzymatic catalysis with living microorganisms. RSC Chem Biol 2021; 2:1073-1083. [PMID: 34458824 PMCID: PMC8341791 DOI: 10.1039/d1cb00072a] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 05/27/2021] [Indexed: 12/04/2022] Open
Abstract
Interfacing non-enzymatic catalysis with cellular metabolism is emerging as a powerful approach to produce a range of high value small molecules and polymers. In this review, we highlight recent examples from this promising young field. Specifically, we discuss demonstrations of living cells mediating redox processes for biopolymer production, interfacing solar-light driven chemistry with microbial metabolism, and intra- and extracellular non-enzymatic catalysis to generate high value molecules. This review highlights the vast potential of this nascent field to bridge the two disciplines of synthetic chemistry and synthetic biology for a sustainable chemical industry.
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Affiliation(s)
- Joanna C Sadler
- Institute of Quantitative Biology, Biochemistry and Biotechnology, School of Biological Sciences, University of Edinburgh Roger Land Building, Alexander Crum Brown Road, King's Buildings Edinburgh, EH9 3FF UK
| | - Jonathan A Dennis
- Institute of Quantitative Biology, Biochemistry and Biotechnology, School of Biological Sciences, University of Edinburgh Roger Land Building, Alexander Crum Brown Road, King's Buildings Edinburgh, EH9 3FF UK
- School of Chemistry, University of Edinburgh Joseph Black Building, David Brewster Road, King's Buildings Edinburgh, EH9 3F UK
| | - Nick W Johnson
- Institute of Quantitative Biology, Biochemistry and Biotechnology, School of Biological Sciences, University of Edinburgh Roger Land Building, Alexander Crum Brown Road, King's Buildings Edinburgh, EH9 3FF UK
| | - Stephen Wallace
- Institute of Quantitative Biology, Biochemistry and Biotechnology, School of Biological Sciences, University of Edinburgh Roger Land Building, Alexander Crum Brown Road, King's Buildings Edinburgh, EH9 3FF UK
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7
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Dorau R, Liu J, Solem C, Jensen PR. Metabolic Engineering of Lactic Acid Bacteria. Metab Eng 2021. [DOI: 10.1002/9783527823468.ch15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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8
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Suo F, Liu J, Chen J, Li X, Solem C, Jensen PR. Efficient Production of Pyruvate Using Metabolically Engineered Lactococcus lactis. Front Bioeng Biotechnol 2021; 8:611701. [PMID: 33490054 PMCID: PMC7815928 DOI: 10.3389/fbioe.2020.611701] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 11/27/2020] [Indexed: 11/17/2022] Open
Abstract
Microbial production of commodity chemicals has gained increasing attention and most of the focus has been on reducing the production cost. Selecting a suitable microorganism, which can grow rapidly on cheap feedstocks, is of key importance when developing an economically feasible bioprocess. We chose Lactococcus lactis, a well-characterized lactic acid bacterium, as our microbial host to produce pyruvate, which is a commodity chemical with various important applications. Here we report the engineering of Lactococcus lactis into becoming an efficient microbial platform for producing pyruvate. The strain obtained, FS1076 (MG1363 Δ3 ldh Δpta ΔadhE Δals), was able to produce pyruvate as the sole product. Since all the competitive pathways had been knocked out, we achieved growth-coupled production of pyruvate with high yield. More than 80 percent of the carbon flux was directed toward pyruvate, and a final titer of 54.6 g/L was obtained using a fed-batch fermentation setup. By introducing lactose catabolism into FS1076, we obtained the strain FS1080, which was able to generate pyruvate from lactose. We then demonstrated the potential of FS1080 for valorizing lactose contained in dairy side-streams, by achieving a high titer (40.1 g/L) and high yield (78.6%) of pyruvate using residual whey permeate (RWP) as substrate. The results obtained, show that the L. lactis platform is well-suited for transforming lactose in dairy waste into food-grade pyruvate, and the yields obtained are the highest reported in the literature. These results demonstrate that it is possible to achieve sustainable bioconversion of waste products from the dairy industry (RWP) to valuable products.
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Affiliation(s)
- Fan Suo
- Division of Production and Microbiology, National Food Institute, Technical University of Denmark, Lyngby, Denmark
| | - Jianming Liu
- Division of Production and Microbiology, National Food Institute, Technical University of Denmark, Lyngby, Denmark
| | - Jun Chen
- Division of Production and Microbiology, National Food Institute, Technical University of Denmark, Lyngby, Denmark
| | - Xuanji Li
- Section of Microbiology, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Christian Solem
- Division of Production and Microbiology, National Food Institute, Technical University of Denmark, Lyngby, Denmark
| | - Peter R. Jensen
- Division of Production and Microbiology, National Food Institute, Technical University of Denmark, Lyngby, Denmark
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9
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Lu L, Mao Y, Kou M, Cui Z, Jin B, Chang Z, Wang Z, Ma H, Chen T. Engineering central pathways for industrial-level (3R)-acetoin biosynthesis in Corynebacterium glutamicum. Microb Cell Fact 2020; 19:102. [PMID: 32398078 PMCID: PMC7216327 DOI: 10.1186/s12934-020-01363-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Accepted: 05/05/2020] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND Acetoin, especially the optically pure (3S)- or (3R)-enantiomer, is a high-value-added bio-based platform chemical and important potential pharmaceutical intermediate. Over the past decades, intense efforts have been devoted to the production of acetoin through green biotechniques. However, efficient and economical methods for the production of optically pure acetoin enantiomers are rarely reported. Previously, we systematically engineered the GRAS microorganism Corynebacterium glutamicum to efficiently produce (3R)-acetoin from glucose. Nevertheless, its yield and average productivity were still unsatisfactory for industrial bioprocesses. RESULTS In this study, cellular carbon fluxes in the acetoin producer CGR6 were further redirected toward acetoin synthesis using several metabolic engineering strategies, including blocking anaplerotic pathways, attenuating key genes of the TCA cycle and integrating additional copies of the alsSD operon into the genome. Among them, the combination of attenuation of citrate synthase and inactivation of phosphoenolpyruvate carboxylase showed a significant synergistic effect on acetoin production. Finally, the optimal engineered strain CGS11 produced a titer of 102.45 g/L acetoin with a yield of 0.419 g/g glucose at a rate of 1.86 g/L/h in a 5 L fermenter. The optical purity of the resulting (3R)-acetoin surpassed 95%. CONCLUSION To the best of our knowledge, this is the highest titer of highly enantiomerically enriched (3R)-acetoin, together with a competitive product yield and productivity, achieved in a simple, green processes without expensive additives or substrates. This process therefore opens the possibility to achieve easy, efficient, economical and environmentally-friendly production of (3R)-acetoin via microbial fermentation in the near future.
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Affiliation(s)
- Lingxue Lu
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering of Ministry of Education, SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Yufeng Mao
- Key Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - Mengyun Kou
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering of Ministry of Education, SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Zhenzhen Cui
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering of Ministry of Education, SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Biao Jin
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering of Ministry of Education, SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Zhishuai Chang
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering of Ministry of Education, SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Zhiwen Wang
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering of Ministry of Education, SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Hongwu Ma
- Key Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - Tao Chen
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering of Ministry of Education, SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China.
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10
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Sharma A, Gupta G, Ahmad T, Kaur B, Hakeem KR. Tailoring cellular metabolism in lactic acid bacteria through metabolic engineering. J Microbiol Methods 2020; 170:105862. [DOI: 10.1016/j.mimet.2020.105862] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 02/03/2020] [Accepted: 02/03/2020] [Indexed: 01/04/2023]
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11
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Xie NZ, Li JX, Huang RB. Biological Production of (S)-acetoin: A State-of-the-Art Review. Curr Top Med Chem 2019; 19:2348-2356. [PMID: 31648637 DOI: 10.2174/1568026619666191018111424] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 08/28/2019] [Accepted: 09/02/2019] [Indexed: 12/24/2022]
Abstract
Acetoin is an important four-carbon compound that has many applications in foods, chemical synthesis, cosmetics, cigarettes, soaps, and detergents. Its stereoisomer (S)-acetoin, a high-value chiral compound, can also be used to synthesize optically active drugs, which could enhance targeting properties and reduce side effects. Recently, considerable progress has been made in the development of biotechnological routes for (S)-acetoin production. In this review, various strategies for biological (S)- acetoin production are summarized, and their constraints and possible solutions are described. Furthermore, future prospects of biological production of (S)-acetoin are discussed.
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Affiliation(s)
- Neng-Zhong Xie
- National Engineering Research Center for Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Key Laboratory of Bio-refinery, Guangxi Biomass Engineering Technology Research Center, Guangxi Academy of Sciences, 98 Daling Road, Nanning, 530007, China
| | - Jian-Xiu Li
- National Engineering Research Center for Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Key Laboratory of Bio-refinery, Guangxi Biomass Engineering Technology Research Center, Guangxi Academy of Sciences, 98 Daling Road, Nanning, 530007, China
| | - Ri-Bo Huang
- National Engineering Research Center for Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Key Laboratory of Bio-refinery, Guangxi Biomass Engineering Technology Research Center, Guangxi Academy of Sciences, 98 Daling Road, Nanning, 530007, China.,State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Life Science and Technology, Guangxi University, 100 Daxue Road, Nanning, 530004, China
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12
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Zhong H, Wang L, Zhao JY, Xiao Z. Fermentative production of chiral acetoin by wild-type Bacillus strains. Prep Biochem Biotechnol 2019; 50:116-122. [PMID: 31526107 DOI: 10.1080/10826068.2019.1666280] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
In recent years, there have been many studies on producing acetoin by microbial fermentation, while only a few studies have focused on chiral acetoin biosynthesis. The weight assignment method was first applied to balance the chiral purity (expressed as the enantiomeric excess value) and the titer of acetoin. Bacillus sp. H-18W, a thermophile, was selected from seven Bacillus strains for chiral acetoin production. To lower the cost of the fermentation medium, soybean meal was used as a feedstock. Four kinds of frequently used commercial proteinases with different active sites were tested for the hydrolyzation of the soybean meal, and the combination of the acidic proteinase and the neutral proteinase showed the best results. In a fermentation medium containing 100 g L-1 glucose and 200 g L-1 hydrolysate, Bacillus sp. H-18W produced 21.84 g L-1 acetoin with an ee value of 96.25% at 60 h. This is the first report of using a thermophilic strain to produce chiral acetoin by microbial fermentation. Thermophilic fermentation can reduce the risk of bacterial contamination and can save cooling water. Using soybean meal hydrolysate and glucose as feedstocks, this work provides an economical and alternative method for the production of chiral pure acetoin.
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Affiliation(s)
- Haoxuan Zhong
- State Key Laboratory of Heavy Oil Processing and Center for Bioengineering & Biotechnology, China University of Petroleum (East China), Qingdao, China
| | - Linhui Wang
- State Key Laboratory of Heavy Oil Processing and Center for Bioengineering & Biotechnology, China University of Petroleum (East China), Qingdao, China
| | - Jing-Yi Zhao
- State Key Laboratory of Heavy Oil Processing and Center for Bioengineering & Biotechnology, China University of Petroleum (East China), Qingdao, China
| | - Zijun Xiao
- State Key Laboratory of Heavy Oil Processing and Center for Bioengineering & Biotechnology, China University of Petroleum (East China), Qingdao, China
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13
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Liu JM, Solem C, Jensen PR. Harnessing biocompatible chemistry for developing improved and novel microbial cell factories. Microb Biotechnol 2019; 13:54-66. [PMID: 31386283 PMCID: PMC6922530 DOI: 10.1111/1751-7915.13472] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 07/18/2019] [Accepted: 07/23/2019] [Indexed: 01/15/2023] Open
Abstract
White biotechnology relies on the sophisticated chemical machinery inside living cells for producing a broad range of useful compounds in a sustainable and environmentally friendly way. However, despite the impressive repertoire of compounds that can be generated using white biotechnology, this approach cannot currently fully replace traditional chemical production, often relying on petroleum as a raw material. One challenge is the limited number of chemical transformations taking place in living organisms. Biocompatible chemistry, that is non‐enzymatic chemical reactions taking place under mild conditions compatible with living organisms, could provide a solution. Biocompatible chemistry is not a novel invention, and has since long been used by living organisms. Examples include Fenton chemistry, used by microorganisms for degrading plant materials, and manganese or ketoacids dependent chemistry used for detoxifying reactive oxygen species. However, harnessing biocompatible chemistry for expanding the chemical repertoire of living cells is a relatively novel approach within white biotechnology, and it could potentially be used for producing valuable compounds which living organisms otherwise are not able to generate. In this mini review, we discuss such applications of biocompatible chemistry, and clarify the potential that lies in using biocompatible chemistry in conjunction with metabolically engineered cell factories for cheap substrate utilization, improved cell physiology, efficient pathway construction and novel chemicals production.
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Affiliation(s)
- Jian-Ming Liu
- National Food Institute, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark
| | - Christian Solem
- National Food Institute, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark
| | - Peter Ruhdal Jensen
- National Food Institute, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark
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14
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Liu J, Chan SHJ, Chen J, Solem C, Jensen PR. Systems Biology - A Guide for Understanding and Developing Improved Strains of Lactic Acid Bacteria. Front Microbiol 2019; 10:876. [PMID: 31114552 PMCID: PMC6503107 DOI: 10.3389/fmicb.2019.00876] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 04/04/2019] [Indexed: 12/15/2022] Open
Abstract
Lactic Acid Bacteria (LAB) are extensively employed in the production of various fermented foods, due to their safe status, ability to affect texture and flavor and finally due to the beneficial effect they have on shelf-life. More recently, LAB have also gained interest as production hosts for various useful compounds, particularly compounds with sensitive applications, such as food ingredients and therapeutics. As for all industrial microorganisms, it is important to have a good understanding of the physiology and metabolism of LAB in order to fully exploit their potential, and for this purpose, many systems biology approaches are available. Systems metabolic engineering, an approach that combines optimization of metabolic enzymes/pathways at the systems level, synthetic biology as well as in silico model simulation, has been used to build microbial cell factories for production of biofuels, food ingredients and biochemicals. When developing LAB for use in foods, genetic engineering is in general not an accepted approach. An alternative is to screen mutant libraries for candidates with desirable traits using high-throughput screening technologies or to use adaptive laboratory evolution to select for mutants with special properties. In both cases, by using omics data and data-driven technologies to scrutinize these, it is possible to find the underlying cause for the desired attributes of such mutants. This review aims to describe how systems biology tools can be used for obtaining both engineered as well as non-engineered LAB with novel and desired properties.
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Affiliation(s)
- Jianming Liu
- National Food Institute, Technical University of Denmark, Kongens Lyngby, Denmark.,Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Champaign, IL, United States
| | - Siu Hung Joshua Chan
- Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, CO, United States
| | - Jun Chen
- National Food Institute, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Christian Solem
- National Food Institute, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Peter Ruhdal Jensen
- National Food Institute, Technical University of Denmark, Kongens Lyngby, Denmark
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Xin Y, Guo T, Mu Y, Kong J. A Single-Plasmid Genome Editing System for Metabolic Engineering of Lactobacillus casei. Front Microbiol 2018; 9:3024. [PMID: 30568651 PMCID: PMC6289983 DOI: 10.3389/fmicb.2018.03024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 11/22/2018] [Indexed: 12/13/2022] Open
Abstract
Genome engineering of Lactobacillus casei, an important industrial microorganism for dairy fermented product, currently relies on inefficient and time-consuming double crossover events. In this study, we developed an easy-to-use genome engineering strategy for metabolic engineering of L. casei for acetoin production. Plasmid pMSP456-Cre, that contains prophage recombinase operon LCABL_13040-50-60 driven by the nisin-controlled inducible expression (NICE) system and the site-specific recombinase gene cre under the control of the promoter of the lactose operon from L. casei, was constructed. Using this plasmid, integration of a hicD3 gene linear donor cassette (up-lox66-cat-lox71-down) was catalyzed by the LCABL_13040-50-60 recombinase and the cat gene was excised by the Cre/lox system with an efficiency of 60%. To demonstrate this system for sequential and iterative knocking out genes in L. casei, another three genes (pflB, ldh and pdhC) related to acetoin production were deleted with the efficiencies of 60, 40, and 60%, respectively. The yielding quadruple mutant could produce a ∼18-fold higher amount of acetoin than the wild-type and converted 59.8% of glucose to acetoin in aerobic. Therefore, these results proved this simple genome engineering strategy have potential in metabolic engineering of L. casei for production of high value-added metabolites.
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Affiliation(s)
- Yongping Xin
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Tingting Guo
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Yingli Mu
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Jian Kong
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
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Li JX, Huang YY, Chen XR, Du QS, Meng JZ, Xie NZ, Huang RB. Enhanced production of optical ( S)-acetoin by a recombinant Escherichia coli whole-cell biocatalyst with NADH regeneration. RSC Adv 2018; 8:30512-30519. [PMID: 35546830 PMCID: PMC9085422 DOI: 10.1039/c8ra06260a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 08/21/2018] [Indexed: 12/19/2022] Open
Abstract
Acetoin is an important platform chemical with a variety of applications in foods, cosmetics, chemical synthesis, and especially in the asymmetric synthesis of optically active pharmaceuticals. It is also a useful breath biomarker for early lung cancer diagnosis. In order to enhance production of optical (S)-acetoin and facilitate this building block for a series of chiral pharmaceuticals derivatives, we have developed a systematic approach using in situ-NADH regeneration systems and promising diacetyl reductase. Under optimal conditions, we have obtained 52.9 g L-1 of (S)-acetoin with an enantiomeric purity of 99.5% and a productivity of 6.2 g (L h)-1. The results reported in this study demonstrated that the production of (S)-acetoin could be effectively improved through the engineering of cofactor regeneration with promising diacetyl reductase. The systematic approach developed in this study could also be applied to synthesize other optically active α-hydroxy ketones, which may provide valuable benefits for the study of drug development.
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Affiliation(s)
- Jian-Xiu Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Life Science and Biotechnology College, Guangxi University 100 Daxue Road Nanning 530004 China
- State Key Laboratory of No-Food Biomass and Enzyme Technology, National Engineering Research Center for No-Food Biorefinery, Guangxi Key Laboratory of Biorefinery, Guangxi Academy of Sciences 98 Daling Road Nanning 530007 China
| | - Yan-Yan Huang
- State Key Laboratory of No-Food Biomass and Enzyme Technology, National Engineering Research Center for No-Food Biorefinery, Guangxi Key Laboratory of Biorefinery, Guangxi Academy of Sciences 98 Daling Road Nanning 530007 China
| | - Xian-Rui Chen
- State Key Laboratory of No-Food Biomass and Enzyme Technology, National Engineering Research Center for No-Food Biorefinery, Guangxi Key Laboratory of Biorefinery, Guangxi Academy of Sciences 98 Daling Road Nanning 530007 China
| | - Qi-Shi Du
- State Key Laboratory of No-Food Biomass and Enzyme Technology, National Engineering Research Center for No-Food Biorefinery, Guangxi Key Laboratory of Biorefinery, Guangxi Academy of Sciences 98 Daling Road Nanning 530007 China
| | - Jian-Zong Meng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Life Science and Biotechnology College, Guangxi University 100 Daxue Road Nanning 530004 China
| | - Neng-Zhong Xie
- State Key Laboratory of No-Food Biomass and Enzyme Technology, National Engineering Research Center for No-Food Biorefinery, Guangxi Key Laboratory of Biorefinery, Guangxi Academy of Sciences 98 Daling Road Nanning 530007 China
| | - Ri-Bo Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Life Science and Biotechnology College, Guangxi University 100 Daxue Road Nanning 530004 China
- State Key Laboratory of No-Food Biomass and Enzyme Technology, National Engineering Research Center for No-Food Biorefinery, Guangxi Key Laboratory of Biorefinery, Guangxi Academy of Sciences 98 Daling Road Nanning 530007 China
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Wang Z, Liu J, Chen L, Zeng AP, Solem C, Jensen PR. Alterations in the transcription factors GntR1 and RamA enhance the growth and central metabolism of Corynebacterium glutamicum. Metab Eng 2018; 48:1-12. [DOI: 10.1016/j.ymben.2018.05.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 05/07/2018] [Indexed: 12/30/2022]
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Liu J, Wang Z, Kandasamy V, Lee SY, Solem C, Jensen PR. Harnessing the respiration machinery for high-yield production of chemicals in metabolically engineered Lactococcus lactis. Metab Eng 2017; 44:22-29. [DOI: 10.1016/j.ymben.2017.09.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2017] [Revised: 08/14/2017] [Accepted: 09/02/2017] [Indexed: 01/25/2023]
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Petersen KV, Liu J, Chen J, Martinussen J, Jensen PR, Solem C. Metabolic characterization and transformation of the non-dairyLactococcus lactisstrain KF147, for production of ethanol from xylose. Biotechnol J 2017; 12. [DOI: 10.1002/biot.201700171] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 04/12/2017] [Accepted: 04/13/2017] [Indexed: 01/17/2023]
Affiliation(s)
- Kia Vest Petersen
- Department of Bioengineering; Technical University of Denmark; Kongens Lyngby Denmark
| | - Jianming Liu
- National Food Institute; Technical University of Denmark; Kongens Lyngby Denmark
| | - Jun Chen
- National Food Institute; Technical University of Denmark; Kongens Lyngby Denmark
| | - Jan Martinussen
- Department of Bioengineering; Technical University of Denmark; Kongens Lyngby Denmark
| | - Peter Ruhdal Jensen
- National Food Institute; Technical University of Denmark; Kongens Lyngby Denmark
| | - Christian Solem
- National Food Institute; Technical University of Denmark; Kongens Lyngby Denmark
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Kandasamy V, Liu J, Dantoft SH, Solem C, Jensen PR. Synthesis of (3R)-acetoin and 2,3-butanediol isomers by metabolically engineered Lactococcus lactis. Sci Rep 2016; 6:36769. [PMID: 27857195 PMCID: PMC5114678 DOI: 10.1038/srep36769] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 10/20/2016] [Indexed: 12/18/2022] Open
Abstract
The potential that lies in harnessing the chemical synthesis capabilities inherent in living organisms is immense. Here we demonstrate how the biosynthetic machinery of Lactococcus lactis, can be diverted to make (3R)-acetoin and the derived 2,3-butanediol isomers meso-(2,3)-butanediol (m-BDO) and (2R,3R)-butanediol (R-BDO). Efficient production of (3R)-acetoin was accomplished using a strain where the competing lactate, acetate and ethanol forming pathways had been blocked. By introducing different alcohol dehydrogenases into this strain, either EcBDH from Enterobacter cloacae or SadB from Achromobacter xylosooxidans, it was possible to achieve high-yield production of m-BDO or R-BDO respectively. To achieve biosustainable production of these chemicals from dairy waste, we transformed the above strains with the lactose plasmid pLP712. This enabled efficient production of (3R)-acetoin, m-BDO and R-BDO from processed whey waste, with titers of 27, 51, and 32 g/L respectively. The corresponding yields obtained were 0.42, 0.47 and 0.40 g/g lactose, which is 82%, 89%, and 76% of maximum theoretical yield respectively. These results clearly demonstrate that L. lactis is an excellent choice as a cell factory for transforming lactose containing dairy waste into value added chemicals.
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Affiliation(s)
| | - Jianming Liu
- National Food Institute, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Shruti Harnal Dantoft
- National Food Institute, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Christian Solem
- National Food Institute, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Peter Ruhdal Jensen
- National Food Institute, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
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