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Nabila DS, Chan R, Syamsuri RRP, Nurlilasari P, Wan-Mohtar WAAQI, Ozturk AB, Rossiana N, Doni F. Biobutanol production from underutilized substrates using Clostridium: Unlocking untapped potential for sustainable energy development. CURRENT RESEARCH IN MICROBIAL SCIENCES 2024; 7:100250. [PMID: 38974669 PMCID: PMC11225672 DOI: 10.1016/j.crmicr.2024.100250] [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] [Indexed: 07/09/2024] Open
Abstract
The increasing demand for sustainable energy has brought biobutanol as a potential substitute for fossil fuels. The Clostridium genus is deemed essential for biobutanol synthesis due to its capability to utilize various substrates. However, challenges in maintaining fermentation continuity and achieving commercialization persist due to existing barriers, including butanol toxicity to Clostridium, low substrate utilization rates, and high production costs. Proper substrate selection significantly impacts fermentation efficiency, final product quality, and economic feasibility in Clostridium biobutanol production. This review examines underutilized substrates for biobutanol production by Clostridium, which offer opportunities for environmental sustainability and a green economy. Extensive research on Clostridium, focusing on strain development and genetic engineering, is essential to enhance biobutanol production. Additionally, critical suggestions for optimizing substrate selection to enhance Clostridium biobutanol production efficiency are also provided in this review. In the future, cost reduction and advancements in biotechnology may make biobutanol a viable alternative to fossil fuels.
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Affiliation(s)
- Devina Syifa Nabila
- Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor, West Java 45363, Indonesia
| | - Rosamond Chan
- Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor, West Java 45363, Indonesia
| | | | - Puspita Nurlilasari
- Department of Agro-industrial Technology, Faculty of Agro-industrial Technology, Universitas Padjadjaran, Jatinangor, West Java 45363, Indonesia
| | - Wan Abd Al Qadr Imad Wan-Mohtar
- Functional Omics and Bioprocess Development Laboratory, Institute of Biological Sciences, Faculty of Science, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - Abdullah Bilal Ozturk
- Department of Chemical Engineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, Esenler, Istanbul 34220, Türkiye
| | - Nia Rossiana
- Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor, West Java 45363, Indonesia
| | - Febri Doni
- Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor, West Java 45363, Indonesia
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Li Q, Zhang J, Yang J, Jiang Y, Yang S. Recent progress on n-butanol production by lactic acid bacteria. World J Microbiol Biotechnol 2021; 37:205. [PMID: 34698975 DOI: 10.1007/s11274-021-03173-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Accepted: 10/13/2021] [Indexed: 11/26/2022]
Abstract
n-Butanol is an essential chemical intermediate produced through microbial fermentation. However, its toxicity to microbial cells has limited its production to a great extent. The anaerobe lactic acid bacteria (LAB) are the most resistant to n-butanol, so it should be the first choice for improving n-butanol production. The present article aims to review the following aspects of n-butanol production by LAB: (1) the tolerance of LAB to n-butanol, including its tolerance level and potential tolerance mechanisms; (2) genome editing tools in the n-butanol-resistant LAB; (3) methods of LAB modification for n-butanol production and the production levels after modification. This review will provide a theoretical basis for further research on n-butanol production by LAB.
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Affiliation(s)
- Qi Li
- College of Life Sciences, Sichuan Normal University, Chengdu, 610101, China
- Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032, China
| | - Jieze Zhang
- Department of Chemistry, University of Southern California, Los Angeles, CA, 90089, USA
| | - Junjie Yang
- Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032, China
| | - Yu Jiang
- Huzhou Center of Industrial Biotechnology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Huzhou, 313000, China
- Shanghai Taoyusheng Biotechnology Company Ltd, Shanghai, 200032, China
| | - Sheng Yang
- Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032, China.
- Huzhou Center of Industrial Biotechnology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Huzhou, 313000, China.
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Peculiar Response in the Co-Culture Fermentation of Leuconostoc mesenteroides and Lactobacillus plantarum for the Production of ABE Solvents. FERMENTATION 2021. [DOI: 10.3390/fermentation7040212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Two bacterial strains (CL11A and CL11D) that are capable of ABE fermentation, identified as Leuconostoc mesenteroides and Weissella cibari, were isolated from the soil surrounding the roots of bean plants. Another strain (ZM 3A), identified as Lactobacillus plantarum, which is capable of purely ethanolic fermentation was isolated from sugarcane. Glucose was used as a standard substrate to investigate the performance of these strains in mono—and co-culture fermentation for ABE production. The performance parameters employed in this study were substrate degradation rates, product and metabolite yields, pH changes and microbial growth rates. Both ABE isolates were capable of producing the three solvents but Leuconostoc mesenteroides had a higher specificity for ethanol than Weissella cibari. The co-culturing of Leuconostoc mesenteroides and Lactobacillus plantarum enhanced ethanol production at the expense of both acetone and butanol, and also influenced the final substrate consumption rate and product yield. The experiments indicated the potential of these niche environments for the isolation of ABE-producing microorganisms. This study contributes to the formulation of ideal microbial co-culture and consortia fermentation, which seeks to maximize the yield and production rates of favored products.
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Zhou Z, Luo Y, Peng S, Zhang Q, Li Z, Li H. Enhancement of Butanol Production in a Newly Selected Strain through Accelerating Phase Shift by Different Phases C/N Ratio Regulation from Puerariae Slag Hydrolysate. BIOTECHNOL BIOPROC E 2021. [DOI: 10.1007/s12257-020-0133-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Butanol Tolerance of Lactiplantibacillus plantarum: A Transcriptome Study. Genes (Basel) 2021; 12:genes12020181. [PMID: 33514005 PMCID: PMC7911632 DOI: 10.3390/genes12020181] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 01/17/2021] [Accepted: 01/26/2021] [Indexed: 12/26/2022] Open
Abstract
Biobutanol is a promising alternative fuel with impaired microbial production thanks to its toxicity. Lactiplantibacillus plantarum (L. plantarum) is among the few bacterial species that can naturally tolerate 3% (v/v) butanol. This study aims to identify the genetic factors involved in the butanol stress response of L. plantarum by comparing the differential gene expression in two strains with very different butanol tolerance: the highly resistant Ym1, and the relatively sensitive 8-1. During butanol stress, a total of 319 differentially expressed genes (DEGs) were found in Ym1, and 516 in 8-1. Fifty genes were upregulated and 54 were downregulated in both strains, revealing the common species-specific effects of butanol stress: upregulation of multidrug efflux transporters (SMR, MSF), toxin-antitoxin system, transcriptional regulators (TetR/AcrR, Crp/Fnr, and DeoR/GlpR), Hsp20, and genes involved in polysaccharide biosynthesis. Strong inhibition of the pyrimidine biosynthesis occurred in both strains. However, the strains differed greatly in DEGs responsible for the membrane transport, tryptophan synthesis, glycerol metabolism, tRNAs, and some important transcriptional regulators (Spx, LacI). Uniquely upregulated in the butanol-resistant strain Ym1 were the genes encoding GntR, GroEL, GroES, and foldase PrsA. The phosphoenolpyruvate flux and the phosphotransferase system (PTS) also appear to be major factors in butanol tolerance.
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Branduardi P. Closing the loop: the power of microbial biotransformations from traditional bioprocesses to biorefineries, and beyond. Microb Biotechnol 2021; 14:68-73. [PMID: 33275324 PMCID: PMC7888447 DOI: 10.1111/1751-7915.13713] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 11/04/2020] [Indexed: 12/20/2022] Open
Abstract
The power of microorganisms in manipulating diverse matrices and in favouring the flux of elements and molecules through biogeochemical cycles developed in the natural environment, but they also managed to take advantage of some niches created by humans. Therefore, inspired by learning these lessons from nature, we can implement biobased processes at industrial level, for diminishing our dependency on fossil resources and to return molecules to their turnover in a compatible timeframe and with reduced environmental impact.
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Affiliation(s)
- Paola Branduardi
- Department of Biotechnology and BiosciencesUniversity of Milano‐BicoccaPiazza della Scienza 2Milano20126Italy
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Li Q, Wu M, Wen Z, Jiang Y, Wang X, Zhao Y, Liu J, Yang J, Jiang Y, Yang S. Optimization of n-butanol synthesis in Lactobacillus brevis via the functional expression of thl, hbd, crt and ter. ACTA ACUST UNITED AC 2020; 47:1099-1108. [DOI: 10.1007/s10295-020-02331-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 11/02/2020] [Indexed: 12/15/2022]
Abstract
Abstract
N-butanol is an important chemical and can be naturally synthesized by Clostridium species; however, the poor n-butanol tolerance of Clostridium impedes the further improvement in titer. In this study, Lactobacillus brevis, which possesses a higher butanol tolerance, was selected as host for heterologous butanol production. The Clostridium acetobutylicum genes thl, hbd, and crt which encode thiolase, β-hydroxybutyryl-CoA dehydrogenase, and crotonase, and the Treponema denticola gene ter, which encodes trans-enoyl-CoA reductase were cloned into a single plasmid to express the butanol synthesis pathway in L. brevis. A titer of 40 mg/L n-butanol was initially achieved with plasmid pLY15-opt, in which all pathway genes are codon-optimized. A titer of 450 mg/L of n-butanol was then synthesized when ter was further overexpressed in this pathway. The role of metabolic flux was reinforced with pLY15, in which only the ter gene was codon-optimized, which greatly increased the n-butanol titer to 817 mg/L. Our strategy significantly improved n-butanol synthesis in L. brevis and the final titer is the highest achieved amongst butanol-tolerant lactic acid bacteria.
Graphic abstract
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Affiliation(s)
- Qi Li
- grid.412600.1 0000 0000 9479 9538 College of Life Sciences Sichuan Normal University 610101 Chengdu China
- grid.9227.e 0000000119573309 Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences Chinese Academy of Sciences 200032 Shanghai China
| | - Meixian Wu
- grid.9227.e 0000000119573309 Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences Chinese Academy of Sciences 200032 Shanghai China
| | - Zhiqiang Wen
- grid.9227.e 0000000119573309 Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences Chinese Academy of Sciences 200032 Shanghai China
| | - Yuan Jiang
- grid.9227.e 0000000119573309 Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences Chinese Academy of Sciences 200032 Shanghai China
| | - Xin Wang
- grid.9227.e 0000000119573309 Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences Chinese Academy of Sciences 200032 Shanghai China
| | - Yawei Zhao
- grid.9227.e 0000000119573309 Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences Chinese Academy of Sciences 200032 Shanghai China
| | - Jinle Liu
- grid.9227.e 0000000119573309 Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences Chinese Academy of Sciences 200032 Shanghai China
| | - Junjie Yang
- grid.9227.e 0000000119573309 Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences Chinese Academy of Sciences 200032 Shanghai China
| | - Yu Jiang
- grid.419092.7 0000 0004 0467 2285 Huzhou Center of Industrial Biotechnology Shanghai Institutes for Biological Sciences 313000 Huzhou China
| | - Sheng Yang
- grid.9227.e 0000000119573309 Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences Chinese Academy of Sciences 200032 Shanghai China
- grid.419092.7 0000 0004 0467 2285 Huzhou Center of Industrial Biotechnology Shanghai Institutes for Biological Sciences 313000 Huzhou China
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How to outwit nature: Omics insight into butanol tolerance. Biotechnol Adv 2020; 46:107658. [PMID: 33220435 DOI: 10.1016/j.biotechadv.2020.107658] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 11/10/2020] [Accepted: 11/13/2020] [Indexed: 12/16/2022]
Abstract
The energy crisis, depletion of oil reserves, and global climate changes are pressing problems of developed societies. One possibility to counteract that is microbial production of butanol, a promising new fuel and alternative to many petrochemical reagents. However, the high butanol toxicity to all known microbial species is the main obstacle to its industrial implementation. The present state of the art review aims to expound the recent advances in modern omics approaches to resolving this insurmountable to date problem of low butanol tolerance. Genomics, transcriptomics, and proteomics show that butanol tolerance is a complex phenomenon affecting multiple genes and their expression. Efflux pumps, stress and multidrug response, membrane transport, and redox-related genes are indicated as being most important during butanol challenge, in addition to fine-tuning of global regulators of transcription (Spo0A, GntR), which may further improve tolerance. Lipidomics shows that the alterations in membrane composition (saturated lipids and plasmalogen increase) are very much species-specific and butanol-related. Glycomics discloses the pleiotropic effect of CcpA, the role of alternative sugar transport, and the production of exopolysaccharides as alternative routes to overcoming butanol stress. Unfortunately, the strain that simultaneously syntheses and tolerates butanol in concentrations that allow its commercialization has not yet been discovered or produced. Omics insight will allow the purposeful increase of butanol tolerance in natural and engineered producers and the effective heterologous expression of synthetic butanol pathways in strains hereditary butanol-resistant up to 3.2 - 4.9% (w/v). Future breakthrough can be achieved by a detailed study of the membrane proteome, of which 21% are proteins with unknown functions.
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Role of efflux in enhancing butanol tolerance of bacteria. J Biotechnol 2020; 320:17-27. [PMID: 32553531 DOI: 10.1016/j.jbiotec.2020.06.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 06/02/2020] [Accepted: 06/12/2020] [Indexed: 12/11/2022]
Abstract
N-butanol, a valued solvent and potential fuel extender, could possibly be produced by fermentation using either native producers, i.e. solventogenic Clostridia, or engineered platform organisms such as Escherichia coli or Pseudomonas species, if the main process obstacle, a low final butanol concentration, could be overcome. A low final concentration of butanol is the result of its high toxicity to production cells. Nevertheless, bacteria have developed several mechanisms to cope with this toxicity and one of them is active butanol efflux. This review presents information about a few well characterized butanol efflux pumps from Gram-negative bacteria (P. putida and E. coli) and summarizes knowledge about putative butanol efflux systems in Gram-positive bacteria.
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Al-Madboly LA, Ali SM, Fakharany EME, Ragab AE, Khedr EG, Elokely KM. Stress-Based Production, and Characterization of Glutathione Peroxidase and Glutathione S-Transferase Enzymes From Lactobacillus plantarum. Front Bioeng Biotechnol 2020; 8:78. [PMID: 32181246 PMCID: PMC7057912 DOI: 10.3389/fbioe.2020.00078] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 01/29/2020] [Indexed: 01/08/2023] Open
Abstract
More attention has been recently directed toward glutathione peroxidase and s-transferase enzymes because of the great importance they hold with respect to their applications in the pharmaceutical field. This work was conducted to optimize the production and characterize glutathione peroxidase and glutathione s-transferase produced by Lactobacillus plantarum KU720558 using Plackett-Burman and Box-Behnken statistical designs. To assess the impact of the culture conditions on the microbial production of the enzymes, colorimetric methods were used. Following data analysis, the optimum conditions that enhanced the s-transferase yield were the De Man-Rogosa-Sharp (MRS) broth as a basal medium supplemented with 0.1% urea, 0.075% H2O2, 0.5% 1-butanol, 0.0125% amino acids, and 0.05% SDS at pH 6.0 and anaerobically incubated for 24 h at 40°C. The optimum s-transferase specific activity was 1789.5 U/mg of protein, which was ~12 times the activity of the basal medium. For peroxidase, the best medium composition was 0.17% urea, 0.025% bile salt, 7.5% Na Cl, 0.05% H2O2, 0.05% SDS, and 2% ethanol added to the MRS broth at pH 6.0 and anaerobically incubated for 24 h at 40°C. Furthermore, the optimum peroxidase specific activity was 612.5 U/mg of protein, indicating that its activity was 22 times higher than the activity recorded in the basal medium. After SDS-PAGE analysis, GST and GPx showed a single protein band of 25 and 18 kDa, respectively. They were able to retain their activities at an optimal temperature of 40°C for an hour and pH range 4–7. The 3D model of both enzymes was constructed showing helical structures, sheet and loops. Protein cavities were also detected to define druggable sites. GST model had two large pockets; 185Å3 and 71 Å3 with druggability score 0.5–0.8. For GPx, the pockets were relatively smaller, 71 Å3 and 32 Å3 with druggability score (0.65–0.66). Therefore, the present study showed that the consortium components as well as the stress-based conditions used could express both enzymes with enhanced productivity, recommending their application based on the obtained results.
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Affiliation(s)
- Lamiaa A Al-Madboly
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Tanta University, Tanta, Egypt
| | - Safaa M Ali
- Nucleic Acid Research Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), City for Scientific Research and Technology Applications, Alexandria, Egypt
| | - Esmail M El Fakharany
- Protein Research Department, Genetic Engineering and Biotechnology Research Institute GEBRI, City for Scientific Research and Technology Applications, New Borg EL Arab, Egypt
| | - Amany E Ragab
- Department of Pharmacognosy, Faculty of Pharmacy, Tanta University, Tanta, Egypt
| | - Eman G Khedr
- Department of Biochemistry, Faculty of Pharmacy, Tanta University, Tanta, Egypt
| | - Khaled M Elokely
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Tanta University, Tanta, Egypt.,Institute for Computational Molecular Science, and Department of Chemistry, Temple University, Philadelphia, PA, United States.,Division of Pharmaceutical Sciences, Arnold and Marie Schwartz College of Pharmacy and Health Sciences, Long Island University, Brooklyn, NY, United States
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Bacteria for Butanol Production: Bottlenecks, Achievements and Prospects. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2019. [DOI: 10.22207/jpam.13.3.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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12
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He X, Xue T, Ma Y, Zhang J, Wang Z, Hong J, Hui L, Qiao J, Song H, Zhang M. Identification of functional butanol-tolerant genes from Escherichia coli mutants derived from error-prone PCR-based whole-genome shuffling. BIOTECHNOLOGY FOR BIOFUELS 2019; 12:73. [PMID: 30976323 PMCID: PMC6442406 DOI: 10.1186/s13068-019-1405-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 03/12/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND Butanol is an important biofuel and chemical. The development of butanol-tolerant strains and the identification of functional butanol-tolerant genes is essential for high-yield bio-butanol production due to the toxicity of butanol. RESULTS Escherichia coli BW25113 was subjected for the first time to error-prone PCR-based whole-genome shuffling. The resulting mutants BW1847 and BW1857 were found to tolerate 2% (v/v) butanol and short-chain alcohols, including ethanol, isobutanol, and 1-pentanol. The mutants exhibited good stability under butanol stress, indicating that they are potential host strains for the construction of butanol pathways. BW1847 had better butanol tolerance than BW1857 under 0-0.75% (v/v) butanol stress, but showed a lower tolerance than BW1857 under 1.25-2% (v/v) butanol stress. Genome resequencing and PCR confirmation revealed that BW1847 and BW1857 had nine and seven single nucleotide polymorphisms, respectively, and a common 14-kb deletion. Functional complementation experiments of the SNPs and deleted genes demonstrated that the mutations of acrB and rob gene and the deletion of TqsA increased the tolerance of the two mutants to butanol. Genome-wide site-specific mutated strains DT385 (acrB C1198T) and DT900 (rob AT686-7) also showed significant tolerance to butanol and had higher butanol efflux ability than the control, further demonstrating that their mutations yield an inactive protein that enhances butanol resistance characteristics. CONCLUSIONS Stable E. coli mutants with enhanced short alcohols and high concentrations of butanol tolerance were obtained through a rapid and effective method. The key genes of butanol tolerance in the two mutants were identified by comparative functional genomic analysis.
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Affiliation(s)
- Xueting He
- Biomass Conversion Laboratory, R&D Center for Petrochemical Technology, Tianjin University, Tianjin, 300072 People’s Republic of China
- Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 People’s Republic of China
| | - Tingli Xue
- Biomass Conversion Laboratory, R&D Center for Petrochemical Technology, Tianjin University, Tianjin, 300072 People’s Republic of China
- Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 People’s Republic of China
| | - Yuanyuan Ma
- Biomass Conversion Laboratory, R&D Center for Petrochemical Technology, Tianjin University, Tianjin, 300072 People’s Republic of China
- Frontier Technology Research Institute, Tianjin University, Tianjin, 30072 People’s Republic of China
- Collaborative Innovation Centre of Chemical Science and Engineering (Tianjin), Tianjin, 300072 China
- Key Laboratory of Systems Bioengineering (Ministry of Education), SynBio Research Platform, Tianjin University, Tianjin, 300072 China
| | - Junyan Zhang
- Biomass Conversion Laboratory, R&D Center for Petrochemical Technology, Tianjin University, Tianjin, 300072 People’s Republic of China
| | - Zhiquan Wang
- Biomass Conversion Laboratory, R&D Center for Petrochemical Technology, Tianjin University, Tianjin, 300072 People’s Republic of China
- Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 People’s Republic of China
| | - Jiefang Hong
- Biomass Conversion Laboratory, R&D Center for Petrochemical Technology, Tianjin University, Tianjin, 300072 People’s Republic of China
| | - Lanfeng Hui
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, 300457 China
| | - Jianjun Qiao
- Collaborative Innovation Centre of Chemical Science and Engineering (Tianjin), Tianjin, 300072 China
- Key Laboratory of Systems Bioengineering (Ministry of Education), SynBio Research Platform, Tianjin University, Tianjin, 300072 China
| | - Hao Song
- Collaborative Innovation Centre of Chemical Science and Engineering (Tianjin), Tianjin, 300072 China
- Key Laboratory of Systems Bioengineering (Ministry of Education), SynBio Research Platform, Tianjin University, Tianjin, 300072 China
| | - Minhua Zhang
- Biomass Conversion Laboratory, R&D Center for Petrochemical Technology, Tianjin University, Tianjin, 300072 People’s Republic of China
- Frontier Technology Research Institute, Tianjin University, Tianjin, 30072 People’s Republic of China
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Russmayer H, Marx H, Sauer M. Microbial 2-butanol production with Lactobacillus diolivorans. BIOTECHNOLOGY FOR BIOFUELS 2019; 12:262. [PMID: 31709011 PMCID: PMC6833138 DOI: 10.1186/s13068-019-1594-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 10/16/2019] [Indexed: 05/14/2023]
Abstract
BACKGROUND Biobutanol has great potential as biofuel of the future. However, only a few organisms have the natural ability to produce butanol. Amongst them, Clostridium spp. are the most efficient producers. The high toxicity of biobutanol constitutes one of the bottlenecks within the biobutanol production process which often suffers from low final butanol concentrations and yields. Butanol tolerance is a key driver for process optimisation and, therefore, in the search for alternative butanol production hosts. Many Lactobacillus species show a remarkable tolerance to solvents and some Lactobacillus spp. are known to naturally produce 2-butanol from meso-2,3-butanediol (meso-2,3-BTD) during anaerobic sugar fermentations. Lactobacillus diolivorans showed already to be highly efficient in the production of other bulk chemicals using a simple two-step metabolic pathway. Exactly, the same pathway enables this cell factory for 2-butanol production. RESULTS Due to the inability of L. diolivorans to produce meso-2,3-BTD, a two-step cultivation processes with Serratia marcescens has been developed. S. marcescens is a very efficient producer of meso-2,3-BTD from glucose. The process yielded a butanol concentration of 10 g/L relying on wild-type bacterial strains. A further improvement of the maximum butanol titer was achieved using an engineered L. diolivorans strain overexpressing the endogenous alcohol dehydrogenase pduQ. The two-step cultivation process based on the engineered strain led to a maximum 2-butanol titer of 13.4 g/L, which is an increase of 34%. CONCLUSION In this study, L. diolivorans is for the first time described as a good natural producer for 2-butanol from meso-2,3-butanediol. Through the application of a two-step cultivation process with S. marcescens, 2-butanol can be produced from glucose in a one-vessel, two-step microbial process.
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Affiliation(s)
- Hannes Russmayer
- CD Laboratory for Biotechnology of Glycerol, Muthgasse 18, 1190 Vienna, Austria
- Department of Biotechnology, Institute of Microbiology and Microbial Biotechnology, BOKU-VIBT University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190 Vienna, Austria
| | - Hans Marx
- CD Laboratory for Biotechnology of Glycerol, Muthgasse 18, 1190 Vienna, Austria
- Department of Biotechnology, Institute of Microbiology and Microbial Biotechnology, BOKU-VIBT University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190 Vienna, Austria
| | - Michael Sauer
- CD Laboratory for Biotechnology of Glycerol, Muthgasse 18, 1190 Vienna, Austria
- Department of Biotechnology, Institute of Microbiology and Microbial Biotechnology, BOKU-VIBT University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190 Vienna, Austria
- ACIB GmbH, Muthgasse 11, 1190 Vienna, Austria
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Petrova P, Tsvetanova F, Petrov K. Low cell surface hydrophobicity is one of the key factors for high butanol tolerance of Lactic acid bacteria. Eng Life Sci 2018; 19:133-142. [PMID: 32624995 DOI: 10.1002/elsc.201800141] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 11/05/2018] [Accepted: 11/21/2018] [Indexed: 12/14/2022] Open
Abstract
Highly butanol-tolerant strains have always been attractive because of their potential as microbial hosts for butanol production. However, due to the amphiphilic nature of 1-butanol as a solvent, the relationship between the cell surface hydrophobicity and butanol resistance remained ambiguous to date. In this work, the quantitatively estimated cell surface hydrophobicity of 74 Lactic acid bacteria strains were juxtaposed to their tolerance to various butanol concentrations. The obtained results revealed that the strains' hydrophobicity was inversely proportional to their butanol tolerance. All highly butanol-resistant strains were hydrophilic (cell surface hydrophobicity<1%), whereas the more hydrophobic the strains were, the more sensitive to butanol they were. Furthermore, cultivation at increasing butanol concentrations showed a clear tendency to decrease the level of hydrophobicity in all tested organisms, thus suggesting possible adaptation mechanisms. Purposeful reduction of cell surface hydrophobicity (by removal of S-layer proteins from the cell envelope) also led to an increase of butanol resistance. Since the results covered 23 different Lactic acid bacteria species of seven genera, it could be concluded that regardless of the species, the lower degree of cells' hydrophobicity clearly correlates with the higher level of butanol tolerance.
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Affiliation(s)
- Penka Petrova
- Institute of Microbiology Bulgarian Academy of Sciences Sofia Bulgaria
| | - Flora Tsvetanova
- Institute of Chemical Engineering Bulgarian Academy of Sciences Sofia Bulgaria
| | - Kaloyan Petrov
- Institute of Chemical Engineering Bulgarian Academy of Sciences Sofia Bulgaria
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15
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Bosma EF, Forster J, Nielsen AT. Lactobacilli and pediococci as versatile cell factories - Evaluation of strain properties and genetic tools. Biotechnol Adv 2017; 35:419-442. [PMID: 28396124 DOI: 10.1016/j.biotechadv.2017.04.002] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 03/29/2017] [Accepted: 04/03/2017] [Indexed: 12/14/2022]
Abstract
This review discusses opportunities and bottlenecks for cell factory development of Lactic Acid Bacteria (LAB), with an emphasis on lactobacilli and pediococci, their metabolism and genetic tools. In order to enable economically feasible bio-based production of chemicals and fuels in a biorefinery, the choice of product, substrate and production organism is important. Currently, the most frequently used production hosts include Escherichia coli and Saccharomyces cerevisiae, but promising examples are available of alternative hosts such as LAB. Particularly lactobacilli and pediococci can offer benefits such as thermotolerance, an extended substrate range and increased tolerance to stresses such as low pH or high alcohol concentrations. This review will evaluate the properties and metabolism of these organisms, and provide an overview of their current biotechnological applications and metabolic engineering. We substantiate the review by including experimental results from screening various lactobacilli and pediococci for transformability, growth temperature range and ability to grow under biotechnologically relevant stress conditions. Since availability of efficient genetic engineering tools is a crucial prerequisite for industrial strain development, genetic tool development is extensively discussed. A range of genetic tools exist for Lactococcus lactis, but for other species of LAB like lactobacilli and pediococci such tools are less well developed. Whereas lactobacilli and pediococci have a long history of use in food and beverage fermentation, their use as platform organisms for production purposes is rather new. By harnessing their properties such as thermotolerance and stress resistance, and by using emerging high-throughput genetic tools, these organisms are very promising as versatile cell factories for biorefinery applications.
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Affiliation(s)
- Elleke F Bosma
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Kemitorvet B220, 2800 Kgs. Lyngby, Denmark
| | - Jochen Forster
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Kemitorvet B220, 2800 Kgs. Lyngby, Denmark
| | - Alex Toftgaard Nielsen
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Kemitorvet B220, 2800 Kgs. Lyngby, Denmark.
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16
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Liu S, Qureshi N, Hughes SR. Progress and perspectives on improving butanol tolerance. World J Microbiol Biotechnol 2017; 33:51. [PMID: 28190182 DOI: 10.1007/s11274-017-2220-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 01/28/2017] [Indexed: 10/20/2022]
Abstract
Fermentative production of butanol for use as a biofuel or chemical feedstock is regarded as a promising renewable technology that reduces greenhouse gas emissions and has the potential to become a substitute for non-sustainable chemical production route. However, butanol toxicity to the producing microbes remains a barrier to achieving sufficiently high titers for cost-effective butanol fermentation and recovery. Investigations of the external stress of high butanol concentration on butanol-producing microbial strains will aid in developing improved microbes with increased tolerance to butanol. With currently available molecular tool boxes, researchers have aimed to address and understand how butanol affects different microbes. This review will cover the individual organism's inherent responses to surrounding butanol levels, and the collective efforts by researchers to improve production and tolerance. The specific microorganisms discussed here include the native butanol producer Clostridium species, the fermentation industrial model Saccharomyces cerevisiae and the photosynthetic cyanobacteria, the genetic engineering workhorse Escherichia coli, and also the butanol-tolerant lactic acid bacteria that utilize diverse substrates. The discussion will help to understand the physiology of butanol resistance and to identify specific butanol tolerance genes that will lead to informed genetic engineering strategies for new strain development.
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Affiliation(s)
- Siqing Liu
- Renewable Product Technology Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, United States Department of Agriculture, 1815 N. University St., Peoria, IL, 61604, USA.
| | - Nasib Qureshi
- Bioenergy Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, United States Department of Agriculture, 1815 N. University St., Peoria, IL, 61604, USA
| | - Stephen R Hughes
- Renewable Product Technology Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, United States Department of Agriculture, 1815 N. University St., Peoria, IL, 61604, USA
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17
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Isolation and characterization of butanol-tolerant Staphylococcus aureus. Biotechnol Lett 2016; 38:1929-1934. [DOI: 10.1007/s10529-016-2180-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Accepted: 07/19/2016] [Indexed: 01/09/2023]
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18
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Pomaranski E, Tiquia-Arashiro SM. Butanol tolerance of carboxydotrophic bacteria isolated from manure composts. ENVIRONMENTAL TECHNOLOGY 2016; 37:1970-1982. [PMID: 26809187 DOI: 10.1080/09593330.2015.1137360] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Carboxydotrophic bacteria (carboxydotrophs) have the ability to uptake carbon monoxide (CO) and synthesize butanol. The aims of this study were to determine the butanol tolerance and biological production of butanol carboxydotrophic strains. In this study, 11 carboxydotrophic strains were exposed to increasing n-butanol concentrations (1-3% vol/vol) to determine their effect on growth. Butanol production by the strains was quantified and the identity of the strains was elucidated using 16S rRNA sequencing. The carboxydotrophic strains possessed inherent tolerance to butanol and tolerated up to 3% n-butanol. Among the 11 strains, T1-16, M2-32 and M3-28 were the most tolerant to butanol. The 16S rRNA gene sequence of these strains was similar (99% nucleotide similarity) to the butanol-tolerant strains Bacillus licheniformis YP1A, Pediococcus acidilacti IMUA20068 and Enterococcus faecium IMAU60169, respectively. The carboxydotrophic strains screened in this study have two distinct features: (1) high tolerance to butanol and (2) natural production of low concentration of butanol from CO, which distinguish them from other screened butanol-tolerant strains. The butanol tolerance of these carboxydotrophic strains makes them ideal for genetic studies, particularly the molecular mechanisms that enable them to survive such hostile environmental conditions and the identification of genes that confer tolerance to butanol.
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Affiliation(s)
- Eric Pomaranski
- a Department of Natural Sciences , The University of Michigan , Dearborn , MI , USA
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19
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Current status and prospects of industrial bio-production of n-butanol in China. Biotechnol Adv 2015; 33:1493-501. [DOI: 10.1016/j.biotechadv.2014.10.007] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 10/17/2014] [Accepted: 10/19/2014] [Indexed: 01/04/2023]
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20
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Ramos JL, Sol Cuenca M, Molina-Santiago C, Segura A, Duque E, Gómez-García MR, Udaondo Z, Roca A. Mechanisms of solvent resistance mediated by interplay of cellular factors inPseudomonas putida. FEMS Microbiol Rev 2015; 39:555-66. [DOI: 10.1093/femsre/fuv006] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/07/2015] [Indexed: 11/14/2022] Open
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21
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Kataoka N, Vangnai AS, Pongtharangkul T, Tajima T, Yakushi T, Matsushita K, Kato J. Construction of CoA-dependent 1-butanol synthetic pathway functions under aerobic conditions in Escherichia coli. J Biotechnol 2015; 204:25-32. [PMID: 25865277 DOI: 10.1016/j.jbiotec.2015.03.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2014] [Revised: 03/04/2015] [Accepted: 03/30/2015] [Indexed: 01/25/2023]
Abstract
1-Butanol is an important industrial platform chemical and an advanced biofuel. While various groups have attempted to construct synthetic pathways for 1-butanol production, efforts to construct a pathway that functions under aerobic conditions have met with limited success. Here, we constructed a CoA-dependent 1-butanol synthetic pathway that functions under aerobic conditions in Escherichia coli, by expanding the previously reported (R)-1,3-butanediol synthetic pathway. The pathway consists of phaA (acetyltransferase) and phaB (NADPH-dependent acetoacetyl-CoA reductase) from Ralstonia eutropha, phaJ ((R)-specific enoyl-CoA hydratase) from Aeromonas caviae, ter (trans-enoyl-CoA reductase) from Treponema denticola, bld (butylraldehyde dehydrogenase) from Clostridium saccharoperbutylacetonicum, and inherent alcohol dehydrogenase(s) from E. coli. To evaluate the potential of this pathway for 1-butanol production, culture conditions, including volumetric oxygen transfer coefficient (kLa) and pH were optimized in a mini-jar fermenter. Under optimal conditions, 1-butanol was produced at a concentration of up to 8.60gL(-1) after 46h of fed-batch cultivation.
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Affiliation(s)
- Naoya Kataoka
- Department of Biological Chemistry, Faculty of Agriculture, Yamaguchi University, Yamaguchi 753-8515, Japan.
| | - Alisa S Vangnai
- Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; Center of Excellence on Hazardous Substance Management (HSM), Chulalongkorn University, Bangkok 10330, Thailand
| | | | - Takahisa Tajima
- Department of Molecular Biotechnology, Graduate School of Advanced Science of Matter, Hiroshima University, Hiroshima 739-8530, Japan
| | - Toshiharu Yakushi
- Department of Biological Chemistry, Faculty of Agriculture, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Kazunobu Matsushita
- Department of Biological Chemistry, Faculty of Agriculture, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Junichi Kato
- Department of Molecular Biotechnology, Graduate School of Advanced Science of Matter, Hiroshima University, Hiroshima 739-8530, Japan
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22
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Improved n-butanol tolerance in Escherichia coli by controlling membrane related functions. J Biotechnol 2015; 204:33-44. [PMID: 25858152 DOI: 10.1016/j.jbiotec.2015.03.025] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 03/19/2015] [Accepted: 03/22/2015] [Indexed: 12/14/2022]
Abstract
As the increasing demand from both chemical and fuel markets, the interest in producing n-butanol using biological route has been rejuvenated to engineer an economical fermentation process, competing with the currently-dominant chemical synthesis. n-Butanol has been traditionally produced from the ABE fermentation of Clostridium acetobutylicum. This system, however, is not economically feasible due to its limited efficiency and the lack of genetic modification tools for further improvements. Alternatively, n-butanol synthesis pathway was successfully transferred into Escherichia coli and rapidly improved to reach a level of production comparable to the native producer. Nevertheless, the toxicity of n-butanol has become a common issue that either approach has to deal with. Previously, we reported our success in improving n-butanol tolerance in E. coli by engineering an Artificial Transcription Factor (ATF) that can modify the expression level of multiple targets simultaneously and improved the n-butanol tolerance of MG1655 strain to 1.5% (vol/vol) n-butanol. However, it was observed that some possible n-butanol tolerance mechanisms did not occurred upon the ATF expression, especially the membrane-related functions such as the homeoviscous adaptation, iron uptaking system, and efflux pump system. In this work, we attempted to enhance the n-butanol tolerance associated with the ATF by combining it with the membrane-related functions in E. coli, including the overexpression of fatty acid synthesis genes, iron-uptaking protein FeoA, and introducing a SrpABC efflux pump from Pseudomonas putida into E. coli. The synergistic effect of this combinatorial approach led to 4, 5, and 9-fold improved growths in the cultures containing 1, 1.5, and 2% (vol/vol) n-butanol, respectively, of an MG1655 knockout strain engineered for n-butanol production, and expanded the tolerance limit to 2% (vol/vol) n-butanol.
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23
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Kanno M, Tamaki H, Mitani Y, Kimura N, Hanada S, Kamagata Y. pH-induced change in cell susceptibility to butanol in a high butanol-tolerant bacterium, Enterococcus faecalis strain CM4A. BIOTECHNOLOGY FOR BIOFUELS 2015; 8:69. [PMID: 25904984 PMCID: PMC4405824 DOI: 10.1186/s13068-015-0251-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 04/02/2015] [Indexed: 05/09/2023]
Abstract
BACKGROUND Though butanol is considered as a potential biofuel, its toxicity toward microorganisms is the main bottleneck for the biological butanol production. Recently, butanol-tolerant bacteria have been proposed as alternative butanol production hosts overcoming the end product inhibition. One remaining key issue to be addressed is how physicochemical properties such as pH and temperature affect microbial butanol tolerance during cultivation and fermentation. RESULTS We investigated the pH effect on butanol tolerance of a high butanol-tolerant bacterium, Enterococcus faecalis strain CM4A. The strain grew over a broad pH range (pH 4.0 to 12.0) and preferred alkaline pH (pH 8.0 and 10.0) in the absence of butanol. However, in the presence of butanol, strain CM4A grew better under acidic and neutral pH conditions (pH 6.0 and 6.8). Membrane fatty acid analysis revealed that the cells exposed to butanol exhibited increased cyclopropane and saturated fatty acids, which contribute to butanol tolerance of the strain by decreasing membrane fluidity, more evidently at acidic and neutral pH than at alkaline pH. Meanwhile, the strain grown under alkaline pH without butanol increased short chain fatty acids, which is involved in increasing membrane fluidity for alkaline adaptation. Such a change was not observed in the cells grown under alkaline pH with butanol. These results suggested that strain CM4A simultaneously exposed to butanol and alkali stresses was not likely able to properly adjust membrane fluidity due to the opposite response to each stress and thereby showed low butanol tolerance under alkaline pH. Indeed, the cells exposed to butanol at alkaline pH showed an irregular shape with disrupted membrane structure under transmission electron microscopy observation, which also indicated the impact of butanol and alkali stresses on functioning of cellular membrane. CONCLUSION The study clearly demonstrated the alkaline pH-induced increase of cell susceptibility to butanol in the tested strain. Our findings indicate the non-negligible impact of pH on microbial butanol tolerance, providing a new insight into efficient butanol production.
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Affiliation(s)
- Manabu Kanno
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8566 Japan
| | - Hideyuki Tamaki
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8566 Japan
| | - Yasuo Mitani
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8566 Japan
| | - Nobutada Kimura
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8566 Japan
| | - Satoshi Hanada
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8566 Japan
| | - Yoichi Kamagata
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8566 Japan
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24
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Liu X, Yu H, Jiang X, Ai G, Yu B, Zhu K. Biosynthesis of butenoic acid through fatty acid biosynthesis pathway in Escherichia coli. Appl Microbiol Biotechnol 2014; 99:1795-804. [DOI: 10.1007/s00253-014-6233-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Revised: 11/05/2014] [Accepted: 11/13/2014] [Indexed: 11/29/2022]
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25
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Li HG, Ofosu FK, Li KT, Gu QY, Wang Q, Yu XB. Acetone, butanol, and ethanol production from gelatinized cassava flour by a new isolates with high butanol tolerance. BIORESOURCE TECHNOLOGY 2014; 172:276-282. [PMID: 25270042 DOI: 10.1016/j.biortech.2014.09.058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 09/12/2014] [Accepted: 09/13/2014] [Indexed: 06/03/2023]
Abstract
To obtain native strains resistant to butanol toxicity, a new isolating method and serial enrichment was used in this study. With this effort, mutant strain SE36 was obtained, which could withstand 35g/L (compared to 20g/L of the wild-type strain) butanol challenge. Based on 16s rDNA comparison, the mutant strain was identified as Clostridium acetobutylicum. Under the optimized condition, the phase shift was smoothly triggered and fermentation performances were consequently enhanced. The maximum total solvent and butanol concentration were 23.6% and 24.3%, respectively higher than that of the wild-type strain. Furthermore, the correlation between butanol produced and the butanol tolerance was investigated, suggesting that enhancing butanol tolerance could improve butanol production. These results indicate that the simple but effective isolation method and acclimatization process are a promising technique for isolation and improvement of butanol tolerance and production.
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Affiliation(s)
- Han-Guang Li
- College of Bioscience and Engineering, Jiangxi Agricultural University, Nanchang 330045, China; The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Fred Kwame Ofosu
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Kun-Tai Li
- College of Bioscience and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Qiu-Ya Gu
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Qiang Wang
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Xiao-Bin Yu
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China.
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26
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From physiology to systems metabolic engineering for the production of biochemicals by lactic acid bacteria. Biotechnol Adv 2013; 31:764-88. [DOI: 10.1016/j.biotechadv.2013.03.011] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Revised: 03/28/2013] [Accepted: 03/31/2013] [Indexed: 11/21/2022]
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27
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Isolation of butanol- and isobutanol-tolerant bacteria and physiological characterization of their butanol tolerance. Appl Environ Microbiol 2013; 79:6998-7005. [PMID: 24014527 DOI: 10.1128/aem.02900-13] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Despite their importance as a biofuel production platform, only a very limited number of butanol-tolerant bacteria have been identified thus far. Here, we extensively explored butanol- and isobutanol-tolerant bacteria from various environmental samples. A total of 16 aerobic and anaerobic bacteria that could tolerate greater than 2.0% (vol/vol) butanol and isobutanol were isolated. A 16S rRNA gene sequencing analysis revealed that the isolates were phylogenetically distributed over at least nine genera: Bacillus, Lysinibacillus, Rummeliibacillus, Brevibacillus, Coprothermobacter, Caloribacterium, Enterococcus, Hydrogenoanaerobacterium, and Cellulosimicrobium, within the phyla Firmicutes and Actinobacteria. Ten of the isolates were phylogenetically distinct from previously identified butanol-tolerant bacteria. Two relatively highly butanol-tolerant strains CM4A (aerobe) and GK12 (obligate anaerobe) were characterized further. Both strains changed their membrane fatty acid composition in response to butanol exposure, i.e., CM4A and GK12 exhibited increased saturated and cyclopropane fatty acids (CFAs) and long-chain fatty acids, respectively, which may serve to maintain membrane fluidity. The gene (cfa) encoding CFA synthase was cloned from strain CM4A and expressed in Escherichia coli. The recombinant E. coli showed relatively higher butanol and isobutanol tolerance than E. coli without the cfa gene, suggesting that cfa can confer solvent tolerance. The exposure of strain GK12 to butanol by consecutive passages even enhanced the growth rate, indicating that yet-unknown mechanisms may also contribute to solvent tolerance. Taken together, the results demonstrate that a wide variety of butanol- and isobutanol-tolerant bacteria that can grow in 2.0% butanol exist in the environment and have various strategies to maintain structural integrity against detrimental solvents.
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28
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Li Z, Xiao H, Jiang W, Jiang Y, Yang S. Improvement of solvent production from xylose mother liquor by engineering the xylose metabolic pathway in Clostridium acetobutylicum EA 2018. Appl Biochem Biotechnol 2013; 171:555-68. [PMID: 23949683 DOI: 10.1007/s12010-013-0414-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Accepted: 07/22/2013] [Indexed: 12/15/2022]
Abstract
Xylose mother liquor (XML) is a by-product of xylose production through acid hydrolysis from corncobs, which can be used potentially for alternative fermentation feedstock. Sixteen Clostridia including 13 wild-type, 1 industrial strain, and 2 genetically engineered strains were screened in XML, among which the industrial strain Clostridium acetobutylicum EA 2018 showed the highest titer of solvents (12.7 g/L) among non-genetic populations, whereas only 40% of the xylose was consumed. An engineered strain (2018glcG-TBA) obtained by combination of glcG disruption and expression of the D-xylose proton-symporter, D-xylose isomerase, and xylulokinase was able to completely utilize glucose and L-arabinose, and 88% xylose in XML. The 2018glcG-TBA produced total solvents up to 21 g/L with a 50% enhancement of total solvent yield (0.33 g/g sugar) compared to that of EA 2018 (0.21 g/g sugar) in XML. This XML-based acetone-butanol-ethanol fermentation using recombinant 2018glcG-TBA was estimated to be economically promising for future production of solvents.
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Affiliation(s)
- Zhilin Li
- Key Laboratory of Synthetic Biology, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, 200032, China
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Liu XB, Gu QY, Yu XB. Repetitive domestication to enhance butanol tolerance and production in Clostridium acetobutylicum through artificial simulation of bio-evolution. BIORESOURCE TECHNOLOGY 2013; 130:638-43. [PMID: 23334021 DOI: 10.1016/j.biortech.2012.12.121] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Revised: 12/14/2012] [Accepted: 12/15/2012] [Indexed: 05/24/2023]
Abstract
To improve butanol tolerance and production in Clostridium acetobutylicum, a novel approach was developed in this study, which was called artificial simulation of bio-evolution (ASBE) based on the evolutionary dynamics and natural selection. Through repetitive evolutionary domestications, a butanol-tolerant strain C. acetobutylicum T64 was obtained, which could withstand 4% (v/v) (compared to 2% of the wild-type) butanol and was accompanied by the increase of butanol production from 12.2g/L to 15.3g/L using corn meal as substrate. Fermentation was also carried out to investigate the relationship between butanol tolerance and ABE production, suggesting that enhancing butanol tolerance could increase butanol production but unlikely improve total ABE production. These results also indicated that the ASBE would be an available and feasible method used in biotechnology for enhancement of butanol tolerance and production.
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Affiliation(s)
- Xiao-Bo Liu
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122 Jiangsu, China
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30
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Screened Butanol-Tolerant Enterococcus faecium Capable of Butanol Production. Appl Biochem Biotechnol 2012; 168:1672-80. [DOI: 10.1007/s12010-012-9888-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Accepted: 08/30/2012] [Indexed: 11/25/2022]
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31
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Garcia-Chavez LY, Garsia CM, Schuur B, de Haan AB. Biobutanol Recovery Using Nonfluorinated Task-Specific Ionic Liquids. Ind Eng Chem Res 2012. [DOI: 10.1021/ie201855h] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lesly Y. Garcia-Chavez
- Department
of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600
MB, Eindhoven, The Netherlands
| | - Christian M. Garsia
- Department
of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600
MB, Eindhoven, The Netherlands
| | - Boelo Schuur
- Department
of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600
MB, Eindhoven, The Netherlands
| | - André B. de Haan
- Department
of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600
MB, Eindhoven, The Netherlands
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32
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Over-expression of stress protein-encoding genes helps Clostridium acetobutylicum to rapidly adapt to butanol stress. Biotechnol Lett 2012; 34:1643-9. [PMID: 22618238 DOI: 10.1007/s10529-012-0951-2] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Accepted: 05/05/2012] [Indexed: 10/28/2022]
Abstract
The toxicity of n-butanol in microbial fermentations limits its formation. The stress response of Clostridium acetobutylicum involves various stress proteins and therefore, over-expression of genes encoding stress proteins constitutes an option to improve solvent tolerance. Over-expression of groESL, grpE and htpG, significantly improved butanol tolerance of C. acetobutylicum. Whereas the wild type and vector control strain did not survive 2 % (v/v) butanol for 2 h, the recombinant strains showed 45 % (groESL), 25 % (grpE) and 56 % (htpG), respectively, of the initial c.f.u. after 2 h of butanol exposure. As previously, over-expression of groESL led to higher butanol production rates, but the novel strains over-expressing grpE or htpG produced only 51 and 68 %, respectively, of the wild type butanol concentrations after 72 h clearly differentiating butanol tolerance and production. Not only butanol tolerance but also the adaptation to butanol in successive stress experiments was significantly facilitated by increased levels of GroESL, GrpE and HtpG. Re-transformation and sequence analyses of the plasmids confirmed that not the plasmids, but the host cells evolved to a more robust phenotype.
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Laluce C, Schenberg ACG, Gallardo JCM, Coradello LFC, Pombeiro-Sponchiado SR. Advances and Developments in Strategies to Improve Strains of Saccharomyces cerevisiae and Processes to Obtain the Lignocellulosic Ethanol−A Review. Appl Biochem Biotechnol 2012; 166:1908-26. [DOI: 10.1007/s12010-012-9619-6] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Accepted: 02/16/2012] [Indexed: 10/28/2022]
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Gu Y, Jiang Y, Wu H, Liu X, Li Z, Li J, Xiao H, Shen Z, Dong H, Yang Y, Li Y, Jiang W, Yang S. Economical challenges to microbial producers of butanol: Feedstock, butanol ratio and titer. Biotechnol J 2011; 6:1348-57. [DOI: 10.1002/biot.201100046] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Lütke-Eversloh T, Bahl H. Metabolic engineering of Clostridium acetobutylicum: recent advances to improve butanol production. Curr Opin Biotechnol 2011; 22:634-47. [DOI: 10.1016/j.copbio.2011.01.011] [Citation(s) in RCA: 290] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Revised: 01/26/2011] [Accepted: 01/26/2011] [Indexed: 11/26/2022]
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