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Wang Y, Li YQ, Wang MJ, Luo CB. Non-sterilized conversion of whole lignocellulosic components into polyhydroxybutyrate by Halomonas sp. Y3 with a dual anti-microbial contamination system. Int J Biol Macromol 2023; 241:124606. [PMID: 37116849 DOI: 10.1016/j.ijbiomac.2023.124606] [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: 02/17/2023] [Revised: 04/12/2023] [Accepted: 04/21/2023] [Indexed: 04/30/2023]
Abstract
Polyhydroxybutyrate (PHB) production from lignocellulosic biomass is challenging due to the need for whole components and energy-effective conversion. Herein, Halomonas sp. Y3, a ligninolytic bacterium with the capacity to produce PHB from lignin and cellulose- and hemicellulose-derived sugars, is employed to explore its feasibility. This strain shows high sugar tolerance up to 200 g/L of glucose and 120 g/L of xylose. A dual anti-microbial contamination system (DACS) containing alkali-halophilic system (AHS) and phosphite-urea system (PUS) is presented, successfully achieving a completely aseptic effect and resulting in a total of 8.2 g of PHB production from 100 g bamboo biomass. We further develop a stage-fed-batch fermentation to promote the complete utilization of xylose. Approximately 69.99 g of dry cell weight (DCW) and 46.45 g of PHB with 66.35 % are obtained from a total of 296.58 g of sugars and 5.70 g of lignin, showing a significant advancement for LCB bioconversion. We then delete the native phosphate transporters, rendering the strain unable to grow on phosphate-loaded media, effectively improving the strain biosafety without compromising its ability to produce PHB. Overall, our findings demonstrate the potential of Y3 as a classic bacterium strain for PHB production with potential uses in industry.
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Affiliation(s)
- Yan Wang
- College of Life Science, Leshan Normal University, Leshan 614000, China
| | - Yuan-Qiu Li
- College of Life Science, Leshan Normal University, Leshan 614000, China; College of Life Sciences, Capital Normal University, Beijing 100048, China
| | - Ming-Jun Wang
- College of Life Science, Leshan Normal University, Leshan 614000, China
| | - Chao-Bing Luo
- College of Life Science, Leshan Normal University, Leshan 614000, China.
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2
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Li YW, Yang CL, Peng H, Nie ZK, Shi TQ, Huang H. RETRACTED ARTICLE: Mutagenesis combined with fermentation optimization to enhance gibberellic acid GA3 yield in Fusarium fujikuroi. BIORESOUR BIOPROCESS 2022; 9:106. [PMID: 38647889 PMCID: PMC10991607 DOI: 10.1186/s40643-022-00595-3] [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: 07/31/2022] [Accepted: 09/20/2022] [Indexed: 11/10/2022] Open
Abstract
Gibberellic acid (GA3) is a plant growth hormone that plays an important role in the production of crops, fruits, and vegetables with a wide market share. Due to intrinsic advantages, liquid fermentation of Fusarium fujikuroi has become the sole method for industrial GA3 production, but the broader application of GA3 is hindered by low titer. In this study, we combined atmospheric and room-temperature plasma (ARTP) with ketoconazole-based screening to obtain the mutant strain 3-6-1 with high yield of GA3. Subsequently, the medium composition and fermentation parameters were systematically optimized to increase the titer of GA3, resulting in a 2.5-fold increase compared with the titer obtained under the initial conditions. Finally, considering that the strain is prone to substrate inhibition and glucose repression, a new strategy of fed-batch fermentation was adopted to increase the titer of GA3 to 575.13 mg/L, which was 13.86% higher than the control. The strategy of random mutagenesis combined with selection and fermentation optimization developed in this study provides a basis for subsequent research on the industrial production of GA3.
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Affiliation(s)
- Ya-Wen Li
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, 2 Xuelin Road, Qixia District, Nanjing, 210023, People's Republic of China
| | - Cai-Ling Yang
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, 2 Xuelin Road, Qixia District, Nanjing, 210023, People's Republic of China
| | - Hui Peng
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30 South Puzhu Road, Nanjing, 211816, People's Republic of China
| | - Zhi-Kui Nie
- Jiangxi New Reyphon Biochemical Co., Ltd., Salt and Chemical Industry, Xingan, China
| | - Tian-Qiong Shi
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, 2 Xuelin Road, Qixia District, Nanjing, 210023, People's Republic of China.
| | - He Huang
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, 2 Xuelin Road, Qixia District, Nanjing, 210023, People's Republic of China
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30 South Puzhu Road, Nanjing, 211816, People's Republic of China
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3
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Choi Y, Kim YH. Regulatory role of cysteines in (2R, 3R)-butanediol dehydrogenase BdhA of Bacillus velezensis strain GH1-13. J Microbiol 2022; 60:411-418. [DOI: 10.1007/s12275-022-2018-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 01/28/2022] [Accepted: 02/03/2022] [Indexed: 11/29/2022]
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Adaptive Laboratory Evolution for Multistress Tolerance, including Fermentability at High Glucose Concentrations in Thermotolerant Candida tropicalis. ENERGIES 2022. [DOI: 10.3390/en15020561] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Candida tropicalis, a xylose-fermenting yeast, has the potential for converting cellulosic biomass to ethanol. Thermotolerant C. tropicalis X-17, which was isolated in Laos, was subjected to repetitive long-term cultivation with a gradual increase in temperature (RLCGT) in the presence of a high concentration of glucose, which exposed cells to various stresses in addition to the high concentration of glucose and high temperatures. The resultant adapted strain demonstrated increased tolerance to ethanol, furfural and hydroxymethylfurfural at high temperatures and displayed improvement in fermentation ability at high glucose concentrations and xylose-fermenting ability. Transcriptome analysis revealed the up-regulation of a gene for a glucose transporter of the major facilitator superfamily and genes for stress response and cell wall proteins. Additionally, hydropathy analysis revealed that three genes for putative membrane proteins with multiple membrane-spanning segments were also up-regulated. From these findings, it can be inferred that the up-regulation of genes, including the gene for a glucose transporter, is responsible for the phenotype of the adaptive strain. This study revealed part of the mechanisms of fermentability at high glucose concentrations in C. tropicalis and the results of this study suggest that RLCGT is an effective procedure for improving multistress tolerance.
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Screening a Strain of Klebsiella sp. O852 and the Optimization of Fermentation Conditions for Trans-Dihydrocarvone Production. Molecules 2021; 26:molecules26092432. [PMID: 33922023 PMCID: PMC8122266 DOI: 10.3390/molecules26092432] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 04/19/2021] [Accepted: 04/21/2021] [Indexed: 11/28/2022] Open
Abstract
Flavors and fragrances have high commercial value in the food, cosmetic, chemical and pharmaceutical industries. It is interesting to investigate the isolation and characterization of new microorganisms with the ability to produce flavor compounds. In this study, a new strain of Klebsiella sp. O852 (accession number CCTCC M2020509) was isolated from decayed navel orange (Citrus sinensis (L.) Osbeck), which was proved to be capable of converting limonene to trans-dihydrocarvone. Besides, the optimization of various reaction parameters to enhance the trans-dihydrocarvone production in shake flask was performed for Klebsiella sp. O852. The results showed that the yield of trans-dihydrocarvone reached up to 1 058 mg/L when Klebsiella sp. O852 was incubated using LB-M medium for 4 h at 36 °C and 150 rpm, and the biotransformation process was monitored for 36 h after adding 1680 mg/L limonene/ethanol (final ethanol concentration of 0.8% (v/v)). The content of trans-dihydrocarvone increased 16 times after optimization. This study provided a basis and reference for producing trans-dihydrocarvone by biotransformation.
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Ourique LJ, Rocha CC, Gomes RCD, Rossi DM, Ayub MAZ. Bioreactor production of 2,3-butanediol by Pantoea agglomerans using soybean hull acid hydrolysate as substrate. Bioprocess Biosyst Eng 2020; 43:1689-1701. [PMID: 32356215 DOI: 10.1007/s00449-020-02362-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 04/23/2020] [Indexed: 11/30/2022]
Abstract
Production of 2,3-butanediol (2,3-BD) by Pantoea agglomerans strain BL1 was investigated using soybean hull hydrolysate as substrate in batch reactors. The cultivation media consisted of a mixture of xylose, arabinose, and glucose, obtained from the hemicellulosic fraction of the soybean hull biomass. We evaluated the influence of oxygen supply, pH control, and media supplementation on the growth kinetics of the microorganism and on 2,3-BD production. P. agglomerans BL1 was able to simultaneously metabolize all three monosaccharides present in the broth, with average conversions of 75% after 48 h of cultivation. The influence of aeration conditions employed demonstrated the mixed acid pathway of 2,3-BD formation by enterobacteria. Under fully aerated conditions (2 vvm of air), up to 14.02 g L-1 of 2.3-BD in 12 h of cultivation were produced, corresponding to yields of 0.53 g g-1 and a productivity of 1.17 g L-1 h-1, the best results achieved. These results suggest the production potential of 2,3-BD by P. agglomerans BL1, which has been recently isolated from an environmental consortium. The present work proposes a solution for the usage of the hemicellulosic fraction of agroindustry biomasses, carbohydrates whose utilization are not commonly addressed in bioprocess.
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Affiliation(s)
- Laura Jensen Ourique
- Biotechnology and Biochemical Engineering Laboratory (BiotecLab), Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Camille Conte Rocha
- Biotechnology and Biochemical Engineering Laboratory (BiotecLab), Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Raul Charpinel Diniz Gomes
- Biotechnology and Biochemical Engineering Laboratory (BiotecLab), Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Daniele Misturini Rossi
- Department of Chemical Engineering, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Marco Antônio Záchia Ayub
- Biotechnology and Biochemical Engineering Laboratory (BiotecLab), Federal University of Rio Grande do Sul, Porto Alegre, Brazil.
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Efficient Allitol Bioproduction from D-Fructose Catalyzed by Recombinant E. coli Whole Cells, and the Condition Optimization, Product Purification. Appl Biochem Biotechnol 2020; 192:680-697. [PMID: 32519252 DOI: 10.1007/s12010-020-03359-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 05/22/2020] [Indexed: 12/24/2022]
Abstract
Allitol is a kind of rare sugar alcohol with potential application value. An engineered strain, which simultaneously expressed D-psicose-3-epimerase (DPE), ribitol dehydrogenase (RDH), and formate dehydrogenase (FDH) three enzymes, was constructed by cloning above three genes into one plasmid and transformed into the host E. coli strain, and used as the whole-cell catalysts for biotransformation of allitol from the low-cost substrate of D-fructose. The whole cell allitol biotransformation conditions were optimized. The medium, recombinant gene induction conditions, and the substrate feeding rate for cultivation of the catalytic cells were optimized. Then, the fed-batch culture was made and scaled up to 10 L fermentor. Finally, 63.44 g/L allitol was obtained from 100 g/L D-fructose after 3 h of biotransformation, and the allitol crystals of 99.9% purity were obtained by using cooling recrystallization. The allitol production method developed in this research has high product purity, and is highly efficient, easily scaled up, and suitable for large-scale production of highly purified allitol.
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Hazeena SH, Sindhu R, Pandey A, Binod P. Lignocellulosic bio-refinery approach for microbial 2,3-Butanediol production. BIORESOURCE TECHNOLOGY 2020; 302:122873. [PMID: 32019707 DOI: 10.1016/j.biortech.2020.122873] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 01/17/2020] [Accepted: 01/21/2020] [Indexed: 06/10/2023]
Abstract
Bio-refinery approach using agricultural and industrial waste material as feedstock is becoming a preferred area of interest in biotechnology in the current decades. The reasons for this trend are mainly because of the declining petroleum resources, greenhouse gas emission risks and fluctuating market price of crude oil. Most chemicals synthesized petro chemically, can be produced using microbial biocatalysts. 2,3-Butanediol (BDO) is such an important platform bulk chemical with numerous industrial applications including as a fuel additive. Although microbial production of BDO is well studied, strategies that could successfully upgrade the current lab-scale researches to an industrial level have to be developed. This review presents an overview of the recent trends and developments in the microbial production of BDO from different lignocellulose biomass.
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Affiliation(s)
- Sulfath Hakkim Hazeena
- Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, Kerala 695 019, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Raveendran Sindhu
- Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, Kerala 695 019, India
| | - Ashok Pandey
- Centre for Innovation and Translational Research, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 31 MG Marg, Lucknow 226 001, India
| | - Parameswaran Binod
- Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, Kerala 695 019, India.
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9
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Dual Purpose of ligninolytic- basidiomycetes: mycoremediation of bioethanol distillation vinasse coupled to sustainable bio-based compounds production. FUNGAL BIOL REV 2020. [DOI: 10.1016/j.fbr.2019.12.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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10
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Fernández-Gutierrez D, Veillette M, Ávalos Ramirez A, Giroir-Fendler A, Faucheux N, Heitz M. Biovalorization of glucose in four culture media and effect of the nitrogen source on fermentative alcohols production by Escherichia coli. ENVIRONMENTAL TECHNOLOGY 2020; 41:211-221. [PMID: 29969951 DOI: 10.1080/09593330.2018.1494751] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 06/22/2018] [Indexed: 06/08/2023]
Abstract
Glucose is one of the most abundant monosaccharides and the easiest carbon source to be consumed by bacteria. In this study, four culture media (LB, M9, M63 and MOPS) were supplemented with glucose at three different concentrations (4, 12.5 and 25 g/L) in the presence of a genetically modified strain of Escherichia coli with the purpose of selecting the most suitable culture medium to obtain ABD (acetoin (A) and 2,3-butanediol (2,3-BD)). The selected medium was M9, the cheapest culture medium, since the ABD yields obtained fermenting 12.5 and 25 g/L of glucose in M9 culture medium at 37°C, atmospheric pressure, initial pH 6.5, 100 rpm and 10% (v/v) of inoculum were similar compared to the ABD yields obtained using M63 and LB culture media. The influence of nitrogen on ABD yield was tested adding sodium nitrate (NaNO3) or urea ((NH2)2CO) to M9 culture medium at three different nitrogen concentrations (2.5, 5.0 and 7.0 g N/L). Adding urea (7.0 g N/L) to M9 supplemented with 25 g/L of glucose improved by 23% the ABD yield at 96 h compared to M9 without urea, reaching a value of 27.2% (g ABD/g glucose). In contrast, the use of NaNO3 had no significant effect on the ABD yield.
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Affiliation(s)
- David Fernández-Gutierrez
- Department of Chemical and Biotechnological Engineering, Faculty of Engineering, Université de Sherbrooke, Sherbrooke, Canada
- Université Lyon 1, CNRS, UMR 5256, IRCELYON, Institut de Recherches sur la Catalyse et l'Environnement de Lyon, Villeurbanne Cedex, France
| | - Marc Veillette
- Department of Chemical and Biotechnological Engineering, Faculty of Engineering, Université de Sherbrooke, Sherbrooke, Canada
| | - Antonio Ávalos Ramirez
- Centre National en Électrochimie et en Technologies Environnementales, Shawinigan, Canada
| | - Anne Giroir-Fendler
- Université Lyon 1, CNRS, UMR 5256, IRCELYON, Institut de Recherches sur la Catalyse et l'Environnement de Lyon, Villeurbanne Cedex, France
| | - Nathalie Faucheux
- Department of Chemical and Biotechnological Engineering, Faculty of Engineering, Université de Sherbrooke, Sherbrooke, Canada
| | - Michèle Heitz
- Department of Chemical and Biotechnological Engineering, Faculty of Engineering, Université de Sherbrooke, Sherbrooke, Canada
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Rosales-Calderon O, Arantes V. A review on commercial-scale high-value products that can be produced alongside cellulosic ethanol. BIOTECHNOLOGY FOR BIOFUELS 2019; 12:240. [PMID: 31624502 PMCID: PMC6781352 DOI: 10.1186/s13068-019-1529-1] [Citation(s) in RCA: 138] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 07/17/2019] [Indexed: 05/03/2023]
Abstract
The demand for fossil derivate fuels and chemicals has increased, augmenting concerns on climate change, global economic stability, and sustainability on fossil resources. Therefore, the production of fuels and chemicals from alternative and renewable resources has attracted considerable and growing attention. Ethanol is a promising biofuel that can reduce the consumption of gasoline in the transportation sector and related greenhouse gas (GHG) emissions. Lignocellulosic biomass is a promising feedstock to produce bioethanol (cellulosic ethanol) because of its abundance and low cost. Since the conversion of lignocellulose to ethanol is complex and expensive, the cellulosic ethanol price cannot compete with those of the fossil derivate fuels. A promising strategy to lower the production cost of cellulosic ethanol is developing a biorefinery which produces ethanol and other high-value chemicals from lignocellulose. The selection of such chemicals is difficult because there are hundreds of products that can be produced from lignocellulose. Multiple reviews and reports have described a small group of lignocellulose derivate compounds that have the potential to be commercialized. Some of these products are in the bench scale and require extensive research and time before they can be industrially produced. This review examines chemicals and materials with a Technology Readiness Level (TRL) of at least 8, which have reached a commercial scale and could be shortly or immediately integrated into a cellulosic ethanol process.
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Affiliation(s)
- Oscar Rosales-Calderon
- Department of Biotechnology, Lorena School of Engineering, University of Sao Paulo, Estrada Municipal do Campinho, Lorena, SP CEP 12602-810 Brazil
| | - Valdeir Arantes
- Department of Biotechnology, Lorena School of Engineering, University of Sao Paulo, Estrada Municipal do Campinho, Lorena, SP CEP 12602-810 Brazil
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Fernández‐Gutierrez D, Veillette M, Ramirez AA, Giroir‐Fendler A, Faucheux N, Heitz M. Production of 2,3‐butanediol from diverse saccharides via fermentation. CAN J CHEM ENG 2019. [DOI: 10.1002/cjce.23584] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- David Fernández‐Gutierrez
- Department of Chemical and Biotechnological EngineeringUniversité de Sherbrooke, SherbrookeQC J1K 2R1 Canada
- Institut de Recherche sur la Catalyse et l’Environnement de Lyon (IRCELYON, Université Lyon 1), Villeurbanne Cedex69626 France
| | - Marc Veillette
- Department of Chemical and Biotechnological EngineeringUniversité de Sherbrooke, SherbrookeQC J1K 2R1 Canada
| | - Antonio Avalos Ramirez
- Centre National en Électrochimie et en Technologies Environnementales, ShawiniganQC G9N 6V8 Canada
| | - Anne Giroir‐Fendler
- Institut de Recherche sur la Catalyse et l’Environnement de Lyon (IRCELYON, Université Lyon 1), Villeurbanne Cedex69626 France
| | - Nathalie Faucheux
- Department of Chemical and Biotechnological EngineeringUniversité de Sherbrooke, SherbrookeQC J1K 2R1 Canada
| | - Michèle Heitz
- Department of Chemical and Biotechnological EngineeringUniversité de Sherbrooke, SherbrookeQC J1K 2R1 Canada
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Zhou W, Tang M, Zou T, Peng N, Zhao M, Gong Z. Phosphate removal combined with acetate supplementation enhances lipid production from water hyacinth by Cutaneotrichosporon oleaginosum. BIOTECHNOLOGY FOR BIOFUELS 2019; 12:148. [PMID: 31223338 PMCID: PMC6570911 DOI: 10.1186/s13068-019-1491-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 06/09/2019] [Indexed: 05/12/2023]
Abstract
BACKGROUND Microbial lipids derived from various lignocellulosic feedstocks have emerged as a promising candidate for the biodiesel industry and a potential substitute for high value-added fats. However, lignocellulosic biomass, especially herbaceous biomass, such as water hyacinth, contains high concentrations of nitrogenous components. These compounds impede microbial lipid production, as lipid biosynthesis is commonly induced by imposing a nutrient deficiency, especially nitrogen starvation. Novel strategies and bioprocesses are pivotal for promoting lipid production from nitrogen-rich biomass. RESULTS Here a combined strategy of phosphate removal and acetate supplementation was described for enhanced microbial lipid production on water hyacinth hydrolysates by Cutaneotrichosporon oleaginosum (formerly Cryptococcus curvatus). Lipid production was significantly improved, when the phosphorus limitation and sugars/acetate co-utilization strategies were used separately. In this case, acetate and glucose were consumed simultaneously. Lipid production was observed by the combination of phosphate removal with acetate supplementation. Lipid titer, content, and yield were determined to be 7.3 g/L, 59.7% and 10.1 g/100 g raw water hyacinth, respectively. These data were increased by 4.2, 4.6, and 4.3 times, respectively, compared to those from the unprocessed hydrolysates. The fatty acid compositions of the resulting lipids bear a marked resemblance to those of rapeseed oil, indicating their applicability to the biodiesel industry. CONCLUSIONS The combination of phosphate removal and acetate supplementation was successful in significantly enhancing microbial lipid production. This strategy offers a valuable solution for nitrogen-rich lignocellulosic feedstocks utilization, which should foster more economical nitrogen-rich biomass-to-lipid bioprocesses.
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Affiliation(s)
- Wenting Zhou
- School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, 947 Heping Road, Wuhan, 430081 People’s Republic of China
- HuBei Province Key Laboratory of Coal Conversion and New Carbon Materials, Wuhan University of Science and Technology, Wuhan, 430081 People’s Republic of China
| | - Mou Tang
- School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, 947 Heping Road, Wuhan, 430081 People’s Republic of China
| | - Tao Zou
- School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, 947 Heping Road, Wuhan, 430081 People’s Republic of China
| | - Na Peng
- School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, 947 Heping Road, Wuhan, 430081 People’s Republic of China
| | - Mi Zhao
- China Carbon Balance Energy and Tech LTD, 1 Jianguomenwai Avenue, Beijing, 100004 People’s Republic of China
| | - Zhiwei Gong
- School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, 947 Heping Road, Wuhan, 430081 People’s Republic of China
- HuBei Province Key Laboratory of Coal Conversion and New Carbon Materials, Wuhan University of Science and Technology, Wuhan, 430081 People’s Republic of China
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14
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Yang Z, Zhang Z. Production of (2R, 3R)-2,3-butanediol using engineered Pichia pastoris: strain construction, characterization and fermentation. BIOTECHNOLOGY FOR BIOFUELS 2018; 11:35. [PMID: 29449883 PMCID: PMC5808657 DOI: 10.1186/s13068-018-1031-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Accepted: 01/23/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND 2,3-butanediol (2,3-BD) is a bulk platform chemical with various potential applications such as aviation fuel. 2,3-BD has three optical isomers: (2R, 3R)-, (2S, 3S)- and meso-2,3-BD. Optically pure 2,3-BD is a crucial precursor for the chiral synthesis and it can also be used as anti-freeze agent due to its low freezing point. 2,3-BD has been produced in both native and non-native hosts. Several pathogenic bacteria were reported to produce 2,3-BD in mixture of its optical isomers including Klebsiella pneumoniae and Klebsiella oxytoca. Engineered hosts based on episomal plasmid expression such as Escherichia coli, Saccharomyces cerevisiae and Bacillus subtilis are not ideal for industrial fermentation due to plasmid instability. RESULTS Pichia pastoris is generally regarded as safe and a well-established host for high-level heterologous protein production. To produce pure (2R, 3R)-2,3-BD enantiomer, we developed a P. pastoris strain by introducing a synthetic pathway. The alsS and alsD genes from B. subtilis were codon-optimized and synthesized. The BDH1 gene from S. cerevisiae was cloned. These three pathway genes were integrated into the genome of P. pastoris and expressed under the control of GAP promoter. Production of (2R, 3R)-2,3-BD was achieved using glucose as feedstock. The optical purity of (2R, 3R)-2,3-BD was more than 99%. The titer of (2R, 3R)-2,3-BD reached 12 g/L with 40 g/L glucose as carbon source in shake flask fermentation. The fermentation conditions including pH, agitation speeds and aeration rates were optimized in batch cultivations. The highest titer of (2R, 3R)-2,3-BD achieved in fed-batch fermentation using YPD media was 45 g/L. The titer of 2,3-BD was enhanced to 74.5 g/L through statistical medium optimization. CONCLUSIONS The potential of engineering P. pastoris into a microbial cell factory for biofuel production was evaluated in this work using (2R, 3R)-2,3-BD as an example. Engineered P. pastoris could be a promising workhorse for the production of optically pure (2R, 3R)-2,3-BD.
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Affiliation(s)
- Zhiliang Yang
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur Private, Ottawa, ON K1N 6N5 Canada
| | - Zisheng Zhang
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur Private, Ottawa, ON K1N 6N5 Canada
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15
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Podleśny M, Kubik-Komar A, Kucharska J, Wyrostek J, Jarocki P, Targoński Z. Media optimization for economic succinic acid production by Enterobacter sp. LU1. AMB Express 2017. [PMID: 28633512 PMCID: PMC5476557 DOI: 10.1186/s13568-017-0423-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Enterobacter sp. LU1 could efficiently convert glycerol to succinic acid under anaerobic conditions after the addition of lactose. In this study, media constituents affecting both Enterobacter sp. LU1 biomass and succinic acid production were investigated employing response surface methodology (RSM) with central composite design. Statistical methods led to the development of an efficient and inexpensive microbiological media based on crude glycerol, whey permeate as carbon sources and urea as a nitrogen source. The optimized production of bacterial biomass in aerobic conditions was predicted and the interactive effects between crude glycerol, urea and magnesium sulfate were investigated. As a result, a model for predicting the concentration of bacterial biocatalyst biomass was developed with crude glycerol as a sole carbon source. In addition, it was observed that the interactive effect between crude glycerol and urea was statistically significant. Response surface methodology was also employed to develop the model for predicting the concentration of succinic acid produced. Validity of the model was confirmed during verification experiments wherein actual results differed from predicted values by 0.77%. The applied statistical methods proved the feasibility for anaerobic succinic acid production on crude glycerol without expensive yeast extract addition. In conclusion, the RSM method can provide valuable information for succinic acid scale-up fermentation using Enterobacter sp. LU1.
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16
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Li Y, Ge XZ, Tian PF. Production of 1,3-propanediol from glycerol using a new isolateKlebsiellasp. AA405 carrying low levels of virulence factors. BIOTECHNOL BIOTEC EQ 2017. [DOI: 10.1080/13102818.2017.1335175] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Affiliation(s)
- Ying Li
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, People's Republic of China
- College of Biochemical Engineering, Beijing Union University, Beijing, People's Republic of China
| | - Xi-Zhen Ge
- College of Biochemical Engineering, Beijing Union University, Beijing, People's Republic of China
| | - Ping-Fang Tian
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, People's Republic of China
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17
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Kim DK, Park JM, Song H, Chang YK. Kinetic modeling of substrate and product inhibition for 2,3-butanediol production by Klebsiella oxytoca. Biochem Eng J 2016. [DOI: 10.1016/j.bej.2016.06.021] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Chan S, Jantama SS, Kanchanatawee S, Jantama K. Process Optimization on Micro-Aeration Supply for High Production Yield of 2,3-Butanediol from Maltodextrin by Metabolically-Engineered Klebsiella oxytoca. PLoS One 2016; 11:e0161503. [PMID: 27603922 PMCID: PMC5014425 DOI: 10.1371/journal.pone.0161503] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Accepted: 08/05/2016] [Indexed: 11/19/2022] Open
Abstract
An optimization process with a cheap and abundant substrate is considered one of the factors affecting the price of the production of economical 2,3-Butanediol (2,3-BD). A combination of the conventional method and response surface methodology (RSM) was applied in this study. The optimized levels of pH, aeration rate, agitation speed, and substrate concentration (maltodextrin) were investigated to determine the cost-effectiveness of fermentative 2,3-BD production by metabolically-engineered Klebsiella oxytoca KMS005. Results revealed that pH, aeration rate, agitation speed, and maltodextrin concentration at levels of 6.0, 0.8 vvm, 400 rpm, and 150 g/L respectively were the optimal conditions. RSM also indicated that the agitation speed was the most influential parameter when either agitation and aeration interaction or agitation and substrate concentration interaction played important roles for 2,3-BD production by the strain from maltodextrin. Under interim fed-batch fermentation, 2,3-BD concentration, yield, and productivity were obtained at 88.1±0.2 g/L, 0.412±0.001 g/g, and 1.13±0.01 g/L/h respectively within 78 h.
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Affiliation(s)
- Sitha Chan
- Metabolic Engineering Research Unit, School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology, 111 University Ave., Suranaree Sub-district, Muang District, Nakhon Ratchasima, 30000, Thailand
| | - Sirima Suvarnakuta Jantama
- Division of Biopharmacy, Faculty of Pharmaceutical Sciences, Ubon Ratchathani University, Warinchamrap, Ubon Ratchathani, 34190, Thailand
| | - Sunthorn Kanchanatawee
- Metabolic Engineering Research Unit, School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology, 111 University Ave., Suranaree Sub-district, Muang District, Nakhon Ratchasima, 30000, Thailand
| | - Kaemwich Jantama
- Metabolic Engineering Research Unit, School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology, 111 University Ave., Suranaree Sub-district, Muang District, Nakhon Ratchasima, 30000, Thailand
- * E-mail:
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19
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Li H, Zhang G, Dang Y. Adaptive laboratory evolution of Klebsiella pneumoniae for improving 2,3-butanediol production. Bioengineered 2016; 7:432-438. [PMID: 27442598 DOI: 10.1080/21655979.2016.1199304] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
Microbial production of 2,3-butanediol is limited by the toxic components in the lignocellulose hydrolysate. To improve the 2,3-butanediol production via Klebsiella pneumoniae from cotton stalk hydrolysate, a method coupling a high tolerance of strain and detoxification of the hydrolysate was thus investigated in this study. The strain tolerance of K. pneumoniae to the cotton stalk hydrolysate was improved via an adaptive laboratory evolution, which involved a stepwise increase in the hydrolysate concentration in the medium. Compared with the initial strain, the resulting strain increased the biomass 3.2-fold in a medium of 20 g/L hydrolysate and produced 10.45 g/L of 2,3-butanediol at an optimal concentration of 60 g/L hydrolysate. After detoxification of cotton stalk hydrolysate, the cell metabolism of K. pneumoniae was further promoted, and the 2,3-butanediol production increased by 1.2 folds. Using fed-batch fermentation, the concentration of 2,3-butanediol reached 35.5 g/L with a yield of 0.43 g/g. The results demonstrated that the bioconversion of low-cost cotton stalk hydrolysate into 2,3-butanediol improves the economics of microbial 2,3-butanediol production.
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Affiliation(s)
| | | | - Yanyan Dang
- a Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University , Shihezi , China
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20
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Biohydrogen Production from Hydrolysates of Selected Tropical Biomass Wastes with Clostridium Butyricum. Sci Rep 2016; 6:27205. [PMID: 27251222 PMCID: PMC4890049 DOI: 10.1038/srep27205] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Accepted: 05/11/2016] [Indexed: 11/25/2022] Open
Abstract
Biohydrogen production has received widespread attention from researchers in industry and academic fields. Response surface methodology (RSM) was applied to evaluate the effects of several key variables in anaerobic fermentation of glucose with Clostridium butyrium, and achieved the highest production rate and yield of hydrogen. Highest H2 yield of 2.02 mol H2/mol-glucose was achieved from 24 h bottle fermentation of glucose at 35 °C, while the composition of medium was (g/L): 15.66 glucose, 6.04 yeast extract, 4 tryptone, 3 K2HPO4, 3 KH2PO4, 0.05 L-cysteine, 0.05 MgSO4·7H2O, 0.1 MnSO4·H2O and 0.3 FeSO4·7H2O, which was very different from that for cell growth. Sugarcane bagasse and Jatropha hulls were selected as typical tropical biomass wastes to produce sugars via a two-step acid hydrolysis for hydrogen production. Under the optimized fermentation conditions, H2 yield (mol H2/mol-total reducing sugar) was 2.15 for glucose, 2.06 for bagasse hydrolysate and 1.95 for Jatropha hull hydrolysate in a 3L fermenter for 24 h at 35 °C, with H2 purity of 49.7–64.34%. The results provide useful information and basic data for practical use of tropical plant wastes to produce hydrogen.
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21
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Richard R, Guillaume D, Jacquin M. Kinetics Modeling of the Heterogeneously Catalyzed Esterification of 2,3-Butanediol with Acetic Acid. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b00133] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Romain Richard
- Laboratoire
de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
- IFP Energies nouvelles,
Rond Point de l’échangeur de Solaize,
BP 3, 69360 Solaize, France
| | - Denis Guillaume
- IFP Energies nouvelles,
Rond Point de l’échangeur de Solaize,
BP 3, 69360 Solaize, France
| | - Marc Jacquin
- IFP Energies nouvelles,
Rond Point de l’échangeur de Solaize,
BP 3, 69360 Solaize, France
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22
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Metabolic engineering of Klebsiella pneumoniae and in silico investigation for enhanced 2,3-butanediol production. Biotechnol Lett 2016; 38:975-82. [DOI: 10.1007/s10529-016-2062-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Accepted: 02/02/2016] [Indexed: 11/26/2022]
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23
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The implementation of high fermentative 2,3-butanediol production from xylose by simultaneous additions of yeast extract, Na2EDTA, and acetic acid. N Biotechnol 2016; 33:16-22. [DOI: 10.1016/j.nbt.2015.07.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 07/28/2015] [Accepted: 07/28/2015] [Indexed: 11/17/2022]
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24
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ZHANG C, LI W, WANG D, GUO X, MA L, XIAO D. Production of 2,3-butanediol by Enterobacter cloacae from corncob-derived xylose. Turk J Biol 2016. [DOI: 10.3906/biy-1506-66] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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25
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Tian Y, Fan Y, Liu J, Zhao X, Chen W. Effect of nitrogen, carbon sources and agitation speed on acetoin production of Bacillus subtilis SF4-3. ELECTRON J BIOTECHN 2016. [DOI: 10.1016/j.ejbt.2015.11.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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26
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Zheng Q, Wales MD, Heidlage MG, Rezac M, Wang H, Bossmann SH, Hohn KL. Conversion of 2,3-butanediol to butenes over bifunctional catalysts in a single reactor. J Catal 2015. [DOI: 10.1016/j.jcat.2015.07.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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27
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Effects of lignocellulose-derived inhibitors on growth and succinic acid accumulation by Corynebacterium glutamicum. BIOTECHNOL BIOPROC E 2015. [DOI: 10.1007/s12257-015-0201-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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28
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Yang P, Zhao J, Cao B, Li L, Wang Z, Tian X, Jia S, Zhu Z. Selective Photocatalytic CC Coupling of Bioethanol into 2,3-Butanediol over Pt-Decorated Hydroxyl-Group-Tunable TiO2Photocatalysts. ChemCatChem 2015. [DOI: 10.1002/cctc.201500326] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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29
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Dai JY, Zhao P, Cheng XL, Xiu ZL. Enhanced production of 2,3-butanediol from sugarcane molasses. Appl Biochem Biotechnol 2015; 175:3014-24. [PMID: 25586489 DOI: 10.1007/s12010-015-1481-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 01/01/2015] [Indexed: 11/29/2022]
Abstract
2,3-Butanediol has been known as a platform green chemical, and the production cost is the key problem for its large-scale production in which the carbon source occupies a major part. Sugarcane molasses is a by-product of sugar industry and considered as a cheap carbon source for biorefinery. In this paper, the fermentation of 2,3-butanediol with sugarcane molasses was studied by reducing the medium ingredients and operation steps. The fermentation medium was optimized by response surface methodology, and 2,3-butanediol production was explored under the deficiency of sterilization, molasses acidification, and organic nitrogen source. Based on these experiments, the fermentation medium with sugarcane molasses as carbon source was simplified to five ingredients, and the steps of molasses acidification and medium sterilization were reduced; thus, the cost was reduced and the production of 2,3-butanediol was enhanced. Under fed-batch fermentation, 99.5 g/L of 2,3-butanediol and acetoin was obtained at 60 h with a yield of 0.39 g/g sugar.
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Affiliation(s)
- Jian-Ying Dai
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, 116024, People's Republic of China,
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30
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Microbial Cell Factories for Diol Production. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2015; 155:165-97. [DOI: 10.1007/10_2015_330] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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31
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Isikgor FH, Becer CR. Lignocellulosic biomass: a sustainable platform for the production of bio-based chemicals and polymers. Polym Chem 2015. [DOI: 10.1039/c5py00263j] [Citation(s) in RCA: 1492] [Impact Index Per Article: 165.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The ongoing research activities in the field of lignocellulosic biomass for production of value-added chemicals and polymers that can be utilized to replace petroleum-based materials are reviewed.
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Affiliation(s)
| | - C. Remzi Becer
- School of Engineering and Materials Science
- Queen Mary University of London
- E1 4NS London
- UK
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32
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Nakashima N, Akita H, Hoshino T. Establishment of a novel gene expression method, BICES (biomass-inducible chromosome-based expression system), and its application to the production of 2,3-butanediol and acetoin. Metab Eng 2014; 25:204-14. [PMID: 25108217 DOI: 10.1016/j.ymben.2014.07.011] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 06/23/2014] [Accepted: 07/29/2014] [Indexed: 11/17/2022]
Abstract
In this study, we describe a novel method for producing valuable chemicals from glucose and xylose in Escherichia coli. The notable features in our method are avoidance of plasmids and expensive inducers for foreign gene expression to reduce production costs; foreign genes are knocked into the chromosome, and their expression is induced with xylose that is present in most biomass feedstock. As loci for the gene knock-in, lacZYA and some pseudogenes are chosen to minimize unexpected effects of the knock-in on cell physiology. The promoter of xylF is inducible with xylose and is combined with the T7 RNA polymerase-T7 promoter system to ensure strong gene expression. This expression system was named BICES (biomass-inducible chromosome-based expression system). As examples of BICES application, 2,3-butanediol and acetoin were successfully produced from glucose and xylose, and the maximal concentrations reached 54gL(-1) [99.6% in (R,S)-form] and 31gL(-1), respectively. 2,3-Butanediol and acetoin are industrially important chemicals that are, at present, produced primarily through petrochemical processes. To demonstrate usability of BICES in practical situations, we produced these chemicals from a saccharified cedar solution. From these results, we can conclude that BICES is suitable for practical production of valuable chemicals from biomass.
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Affiliation(s)
- Nobutaka Nakashima
- Bioproduction Research Institute, National Institute of Advanced Industrial Sciences and Technology (AIST), 2-17-2-1 Tsukisamu-Higashi, Toyohira-ku, Sapporo 062-8517, Japan; Department of Biological Information, Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 2-12-1-M6-5 Ookayama, Meguro-ku, Tokyo 152-8550, Japan.
| | - Hironaga Akita
- Biomass Refinery Research Center, National Institute of Advanced Industrial Sciences and Technology (AIST), 3-11-32 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-0046, Japan
| | - Tamotsu Hoshino
- Bioproduction Research Institute, National Institute of Advanced Industrial Sciences and Technology (AIST), 2-17-2-1 Tsukisamu-Higashi, Toyohira-ku, Sapporo 062-8517, Japan; Biomass Refinery Research Center, National Institute of Advanced Industrial Sciences and Technology (AIST), 3-11-32 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-0046, Japan
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33
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Zhang CY, Peng XP, Li W, Guo XW, Xiao DG. Optimization of 2,3-butanediol production byEnterobacter cloacaein simultaneous saccharification and fermentation of corncob residue. Biotechnol Appl Biochem 2014; 61:501-9. [DOI: 10.1002/bab.1198] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2013] [Accepted: 12/21/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Cui-Ying Zhang
- Key Laboratory of Industrial Fermentation Microbiology; Ministry of Education; Tianjin Industrial Microbiology Key Laboratory; College of Biotechnology; Tianjin University of Science and Technology; Tianjin People's Republic of China
| | - Xiao-Pei Peng
- Key Laboratory of Industrial Fermentation Microbiology; Ministry of Education; Tianjin Industrial Microbiology Key Laboratory; College of Biotechnology; Tianjin University of Science and Technology; Tianjin People's Republic of China
- Food and Health Product R&D Center; Tasly Academy; Tianjin People's Republic of China
| | - Wei Li
- Key Laboratory of Industrial Fermentation Microbiology; Ministry of Education; Tianjin Industrial Microbiology Key Laboratory; College of Biotechnology; Tianjin University of Science and Technology; Tianjin People's Republic of China
| | - Xue-Wu Guo
- Key Laboratory of Industrial Fermentation Microbiology; Ministry of Education; Tianjin Industrial Microbiology Key Laboratory; College of Biotechnology; Tianjin University of Science and Technology; Tianjin People's Republic of China
| | - Dong-Guang Xiao
- Key Laboratory of Industrial Fermentation Microbiology; Ministry of Education; Tianjin Industrial Microbiology Key Laboratory; College of Biotechnology; Tianjin University of Science and Technology; Tianjin People's Republic of China
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34
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Wong CL, Yen HW, Lin CL, Chang JS. Effects of pH and fermentation strategies on 2,3-butanediol production with an isolated Klebsiella sp. Zmd30 strain. BIORESOURCE TECHNOLOGY 2013; 152:169-176. [PMID: 24291317 DOI: 10.1016/j.biortech.2013.10.101] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2013] [Revised: 10/26/2013] [Accepted: 10/28/2013] [Indexed: 06/02/2023]
Abstract
This study examined the effects of pH-controlled and fermentation strategies on 2,3-butanediol (2,3-BDO) production by an isolated Klebsiella sp. Zmd30 strain. The pH value of 6.0 was found to be optimal among the investigated range of 4.5-9.0. In batch fermentation, the concentration, productivity and yield of 2,3-BDO were 57.17 g/l, 1.59 g/l/h and 82%, respectively. The 2,3-BDO production by Klebsiella sp. Zmd30 was found to be growth-associated. Higher 2,3-BDO concentration (110 g/l) and yield (94%) was obtained by using fed-batch operation, but the productivity was lower (0.88 g/l/h) as compared to that when using batch operation. The highest 2,3-BDO productivity of 2.81 g/l/h was obtained with the continuous culture at a hydraulic retention time (HRT) of 12h. The results suggest that fed-batch operation might be most suitable for commercialized 2,3-BDO production, due to obtaining a high concentration and yield.
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Affiliation(s)
- Chiao-Ling Wong
- Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan
| | - Hong-Wei Yen
- Department of Chemical and Materials Engineering, Tunghai University, Taichung 407, Taiwan.
| | - Chung-Liang Lin
- Solvent and Chemical Business Division, CPC Corporation, Taiwan, Chia-Yi 600, Taiwan
| | - Jo-Shu Chang
- Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan; Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan 701, Taiwan; University Center for Bioscience and Biotechnology, National Cheng Kung University, Tainan 701, Taiwan.
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35
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Wang C, Zhang H, Cai H, Zhou Z, Chen Y, Chen Y, Ouyang P. Succinic Acid Production from Corn Cob Hydrolysates by Genetically Engineered Corynebacterium glutamicum. Appl Biochem Biotechnol 2013; 172:340-50. [DOI: 10.1007/s12010-013-0539-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Accepted: 09/15/2013] [Indexed: 11/25/2022]
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36
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López JA, Lázaro CDC, Castilho LDR, Freire DMG, Castro AMD. Characterization of multienzyme solutions produced by solid-state fermentation of babassu cake, for use in cold hydrolysis of raw biomass. Biochem Eng J 2013. [DOI: 10.1016/j.bej.2013.06.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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37
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Park JM, Song H, Lee HJ, Seung D. In silico aided metabolic engineering of Klebsiella oxytoca and fermentation optimization for enhanced 2,3-butanediol production. J Ind Microbiol Biotechnol 2013; 40:1057-66. [PMID: 23779220 DOI: 10.1007/s10295-013-1298-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2013] [Accepted: 05/29/2013] [Indexed: 10/26/2022]
Abstract
Klebsiella oxytoca naturally produces a large amount of 2,3-butanediol (2,3-BD), a promising bulk chemical with wide industrial applications, along with various byproducts. In this study, the in silico gene knockout simulation of K. oxytoca was carried out for 2,3-BD overproduction by inhibiting the formation of byproducts. The knockouts of ldhA and pflB genes were targeted with the criteria of maximization of 2,3-BD production and minimization of byproducts formation. The constructed K. oxytoca ΔldhA ΔpflB strain showed higher 2,3-BD yields and higher final concentrations than those obtained from the wild-type and ΔldhA strains. However, the simultaneous deletion of both genes caused about a 50 % reduction in 2,3-BD productivity compared with K. oxytoca ΔldhA strain. Based on previous studies and in silico investigation that the agitation speed during 2,3-BD fermentation strongly affected cell growth and 2,3-BD synthesis, the effect of agitation speed on 2,3-BD production was investigated from 150 to 450 rpm in 5-L bioreactors containing 3-L culture media. The highest 2,3-BD productivity (2.7 g/L/h) was obtained at 450 rpm in batch fermentation. Considering the inhibition of acetoin for 2,3-BD production, fed-batch fermentations were performed using K. oxytoca ΔldhA ΔpflB strain to enhance 2,3-BD production. Altering the agitation speed from 450 to 350 rpm at nearly 10 g/L of acetoin during the fed-batch fermentation allowed for the production of 113 g/L 2,3-BD, with a yield of 0.45 g/g, and for the production of 2.1 g/L/h of 2,3-BD.
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Affiliation(s)
- Jong Myoung Park
- Research and Development Center, GS Caltex Corporation, 104-4 Munji-dong, Yuseong-gu, Daejeon, 305-380, Republic of Korea
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38
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Van Dien S. From the first drop to the first truckload: commercialization of microbial processes for renewable chemicals. Curr Opin Biotechnol 2013; 24:1061-8. [PMID: 23537815 DOI: 10.1016/j.copbio.2013.03.002] [Citation(s) in RCA: 111] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Revised: 02/27/2013] [Accepted: 03/05/2013] [Indexed: 01/24/2023]
Abstract
Fermentation of carbohydrate substrates by microorganisms represents an attractive route for the manufacture of industrial chemicals from renewable resources. The technology to manipulate metabolism of bacteria and yeast, including the introduction of heterologous chemical pathways, has accelerated research in this field. However, the public literature contains very few examples of strains achieving the production metrics required for commercialization. This article presents the challenges in reaching commercial titer, yield, and productivity targets, along with other necessary strain and process characteristics. It then reviews various methods in systems biology, synthetic biology, enzyme engineering, and fermentation engineering which can be applied to strain improvement, and presents a strategy for using these tools to overcome the major hurdles on the path to commercialization.
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Affiliation(s)
- Stephen Van Dien
- Genomatica, Inc., 10520 Wateridge Circle, San Diego, CA 92121, United States.
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39
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Park JM, Song H, Lee HJ, Seung D. Genome-scale reconstruction and in silico analysis of Klebsiella oxytoca for 2,3-butanediol production. Microb Cell Fact 2013; 12:20. [PMID: 23432904 PMCID: PMC3602198 DOI: 10.1186/1475-2859-12-20] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Accepted: 02/17/2013] [Indexed: 01/28/2023] Open
Abstract
Background Klebsiella oxytoca, a Gram-negative, rod-shaped, and facultative anaerobic bacterium, is one of the most promising 2,3-butanediol (2,3-BD) producers. In order to improve the metabolic performance of K. oxytoca as an efficient biofactory, it is necessary to assess its metabolic characteristics with a system-wide scope, and to optimize the metabolic pathways at a systems level. Provision of the complete genome sequence of K. oxytoca enabled the construction of genome-scale metabolic model of K. oxytoca and its in silico analyses. Results The genome-scale metabolic model of K. oxytoca was constructed using the annotated genome with biochemical and physiological information. The stoichiometric model, KoxGSC1457, is composed of 1,457 reactions and 1,099 metabolites. The model was further refined by applying biomass composition equations and comparing in silico results with experimental data based on constraints-based flux analyses. Then, the model was applied to in silico analyses to understand the properties of K. oxytoca and also to improve its capabilities for 2,3-BD production according to genetic and environmental perturbations. Firstly, in silico analysis, which tested the effect of augmenting the metabolic flux pool of 2,3-BD precursors, elucidated that increasing the pyruvate pool is primarily important for 2,3-BD synthesis. Secondly, we performed in silico single gene knockout simulation for 2,3-BD overproduction, and investigated the changes of the in silico flux solution space of a ldhA gene knockout mutant in comparison with that of the wild-type strain. Finally, the KoxGSC1457 model was used to optimize the oxygen levels during fermentation for 2,3-BD production. Conclusions The genome-scale metabolic model, KoxGSC1457, constructed in this study successfully investigated metabolic characteristics of K. oxytoca at systems level. The KoxGSC1457 model could be employed as an useful tool to analyze its metabolic capabilities, to predict its physiological responses according to environmental and genetic perturbations, and to design metabolic engineering strategies to improve its metabolic performance.
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Affiliation(s)
- Jong Myoung Park
- Research and Development Center, GS Caltex Corporation, 104-4 Munji-dong, Daejeon, 305-380, Republic of Korea
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Han SH, Lee JE, Park K, Park YC. Production of 2,3-butanediol by a low-acid producing Klebsiella oxytoca NBRF4. N Biotechnol 2013; 30:166-72. [DOI: 10.1016/j.nbt.2012.09.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2012] [Revised: 09/07/2012] [Accepted: 09/10/2012] [Indexed: 11/29/2022]
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Xiao Z, Wang X, Huang Y, Huo F, Zhu X, Xi L, Lu JR. Thermophilic fermentation of acetoin and 2,3-butanediol by a novel Geobacillus strain. BIOTECHNOLOGY FOR BIOFUELS 2012; 5:88. [PMID: 23217110 PMCID: PMC3538569 DOI: 10.1186/1754-6834-5-88] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Accepted: 11/30/2012] [Indexed: 05/04/2023]
Abstract
BACKGROUND Acetoin and 2,3-butanediol are two important biorefinery platform chemicals. They are currently fermented below 40°C using mesophilic strains, but the processes often suffer from bacterial contamination. RESULTS This work reports the isolation and identification of a novel aerobic Geobacillus strain XT15 capable of producing both of these chemicals under elevated temperatures, thus reducing the risk of bacterial contamination. The optimum growth temperature was found to be between 45 and 55°C and the medium initial pH to be 8.0. In addition to glucose, galactose, mannitol, arabionose, and xylose were all acceptable substrates, enabling the potential use of cellulosic biomass as the feedstock. XT15 preferred organic nitrogen sources including corn steep liquor powder, a cheap by-product from corn wet-milling. At 55°C, 7.7 g/L of acetoin and 14.5 g/L of 2,3-butanediol could be obtained using corn steep liquor powder as a nitrogen source. Thirteen volatile products from the cultivation broth of XT15 were identified by gas chromatography-mass spectrometry. Acetoin, 2,3-butanediol, and their derivatives including a novel metabolite 2,3-dihydroxy-3-methylheptan-4-one, accounted for a total of about 96% of all the volatile products. In contrast, organic acids and other products were minor by-products. α-Acetolactate decarboxylase and acetoin:2,6-dichlorophenolindophenol oxidoreductase in XT15, the two key enzymes in acetoin metabolic pathway, were found to be both moderately thermophilic with the identical optimum temperature of 45°C. CONCLUSIONS Geobacillus sp. XT15 is the first naturally occurring thermophile excreting acetoin and/or 2,3-butanediol. This work has demonstrated the attractive prospect of developing it as an industrial strain in the thermophilic fermentation of acetoin and 2,3-butanediol with improved anti-contamination performance. The novel metabolites and enzymes identified in XT15 also indicated its strong promise as a precious biological resource. Thermophilic fermentation also offers great prospect for improving its yields and efficiencies. This remains a core aim for future work.
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Affiliation(s)
- Zijun Xiao
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering & Biotechnology, China University of Petroleum, Qingdao, 266580, PR China
| | - Xiangming Wang
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering & Biotechnology, China University of Petroleum, Qingdao, 266580, PR China
| | - Yunling Huang
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering & Biotechnology, China University of Petroleum, Qingdao, 266580, PR China
| | - Fangfang Huo
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering & Biotechnology, China University of Petroleum, Qingdao, 266580, PR China
| | - Xiankun Zhu
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering & Biotechnology, China University of Petroleum, Qingdao, 266580, PR China
| | - Lijun Xi
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering & Biotechnology, China University of Petroleum, Qingdao, 266580, PR China
| | - Jian R Lu
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester, Manchester, M13 9PL, UK
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Wong CL, Huang CC, Lu WB, Chen WM, Chang JS. Producing 2,3-butanediol from agricultural waste using an indigenous Klebsiella sp. Zmd30 strain. Biochem Eng J 2012. [DOI: 10.1016/j.bej.2012.08.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Wang A, Xu Y, Ma C, Gao C, Li L, Wang Y, Tao F, Xu P. Efficient 2,3-butanediol production from cassava powder by a crop-biomass-utilizer, Enterobacter cloacae subsp. dissolvens SDM. PLoS One 2012; 7:e40442. [PMID: 22792324 PMCID: PMC3390385 DOI: 10.1371/journal.pone.0040442] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2012] [Accepted: 06/07/2012] [Indexed: 11/30/2022] Open
Abstract
Background 2,3-Butanediol (BD) is considered as one of the key platform chemicals used in a variety of industrial applications. It is crucial to find an efficient sugar-utilizing strain and feasible carbon source for the economical production of BD. Methodology/Principal Findings Efficient BD production by a newly isolated Enterobacter cloacae subsp. dissolvens SDM was studied using crop-biomass cassava powder as substrate. The culture conditions and fermentation medium for BD production were optimized. Under the optimal conditions, 78.3 g l−1 of BD was produced after 24 h in simultaneous saccharification and fermentation (SSF), with a yield of 0.42 g BD g−1 cassava powder and a specific productivity of 3.3 g l−1 h−1. A higher BD concentration (93.9 g l−1) was produced after 47 h in fed-batch SSF. Conclusions/Significance The results suggest that strain SDM is a good candidate for the BD production, and cassava powder could be used as an alternative substrate for the efficient production of BD.
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Affiliation(s)
- Ailong Wang
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, People's Republic of China
| | - Youqiang Xu
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, People's Republic of China
| | - Cuiqing Ma
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, People's Republic of China
- * E-mail:
| | - Chao Gao
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, People's Republic of China
| | - Lixiang Li
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, People's Republic of China
| | - Yu Wang
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, People's Republic of China
| | - Fei Tao
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Ping Xu
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, People's Republic of China
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, People's Republic of China
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Gao C, Zhang W, Huang Y, Ma C, Xu P. Efficient conversion of 1,2-butanediol to (R)-2-hydroxybutyric acid using whole cells of Gluconobacter oxydans. BIORESOURCE TECHNOLOGY 2012; 115:75-78. [PMID: 22126977 DOI: 10.1016/j.biortech.2011.11.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2011] [Revised: 11/01/2011] [Accepted: 11/02/2011] [Indexed: 05/31/2023]
Abstract
(R)-2-Hydroxybutyric acid ((R)-2-HBA) is an important building block for azinothricin family of antitumour antibiotics and biodegradable poly(2-hydroxybutyric acid). However, optically active (R)-2-HBA could not be produced through microbial fermentation or chemical synthesis. Several biocatalytic methods have been reported for the production of (R)-2-HBA. Those processes used expensive and scarce substrates and would not be suitable for practical application. In this work, Gluconobacter oxydans DSM 2003 was confirmed to have the ability to produce (R)-2-HBA from 1,2-butanediol, a non-toxic and inexpensive compound that had a great potential for biotechnological processes. Under the optimal conditions, the biocatalytic process produced (R)-2-HBA at a high concentration (18.5 g l(-1)) and a high enantiomeric excess (99.7%). The biocatalysis process introduced in this study may provide a technically and economically interesting route for production of (R)-2-HBA.
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Affiliation(s)
- Chao Gao
- State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai 200240, PR China
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Zheng H, Gao Z, Yin J, Tang X, Ji X, Huang H. Harvesting of microalgae by flocculation with poly (γ-glutamic acid). BIORESOURCE TECHNOLOGY 2012; 112:212-20. [PMID: 22425514 DOI: 10.1016/j.biortech.2012.02.086] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2011] [Revised: 02/07/2012] [Accepted: 02/13/2012] [Indexed: 05/06/2023]
Abstract
In an effort to search for an efficient and environmentally friendly harvesting method, a commercially available microbial flocculant poly (γ-glutamic acid) (γ-PGA) was used to harvest oleaginous microalgae. Conditions for flocculation of marine Chlorella vulgaris and freshwater Chlorella protothecoides were optimized by response surface methodology (RSM) and determined to be 22.03 mg L(-1) γ-PGA, 0.57 g L(-1) biomass, and 11.56 g L(-1) salinity, and 19.82 mg L(-1) γ-PGA and 0.60 g L(-1) biomass, respectively. Application of the two optimized flocculation methods to Nannochloropsis oculata LICME 002, Phaeodactylum tricornutum, C. vulgaris LICME 001, and Botryococcus braunii LICME 003 gave no less than 90% flocculation efficiency and a concentration factor greater than 20. Micrographs of the harvested microalgal cells showed no damage to cell integrity, and hence no lipid loss during the process. The results show that flocculation with γ-PGA is feasible for harvesting microalgae for biodiesel production.
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Affiliation(s)
- Hongli Zheng
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, No. 5, Xinmofan Road, Nanjing 210009, People's Republic of China
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Jiang LQ, Fang Z, Guo F, Yang LB. Production of 2,3-butanediol from acid hydrolysates of Jatropha hulls with Klebsiella oxytoca. BIORESOURCE TECHNOLOGY 2012; 107:405-10. [PMID: 22230777 DOI: 10.1016/j.biortech.2011.12.083] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2011] [Revised: 12/15/2011] [Accepted: 12/16/2011] [Indexed: 05/03/2023]
Abstract
Jatropha hulls were successfully for the first time used as raw materials for the production of 2,3-butanediol via dilute sulfuric acid hydrolysis and fermentation with Klebsiella oxytoca. Two-step hydrolysis was used to effectively hydrolyze the hulls at 150°C after pretreatment. In the first-step, hemicellulose was hydrolyzed under mild conditions (0.5h, 1.5% acid) to avoid secondary decomposition. The remained cellulose was further hydrolyzed in the second-step under severer conditions (1h, 4% acid). After hydrolysis, total hydrolysis yield was 64%, which was much higher than that (37%) from the first-step. Maximum yields of 2,3-butanediol and acetoin in flask experiments were 35.6% and 41.4% from the hydrolysates of the first- and second-step hydrolysis, equivalent to 71.2% and 82.8% of the theoretical values, respectively. Similar yields were obtained in a controlled bioreactor but with higher productivities. Jatropha hulls are attractive raw materials for the production of 2,3-butanediol with high yield.
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Affiliation(s)
- Li-Qun Jiang
- Chinese Academy of Sciences, Biomass Group, Laboratory of Tropical Plant Resource Science, Xishuangbanna Tropical Botanical Garden, 88 Xuefulu, Kunming, Yunnan 650223, China
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Biswas R, Yamaoka M, Nakayama H, Kondo T, Yoshida KI, Bisaria VS, Kondo A. Enhanced production of 2,3-butanediol by engineered Bacillus subtilis. Appl Microbiol Biotechnol 2012; 94:651-8. [DOI: 10.1007/s00253-011-3774-5] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2011] [Revised: 11/08/2011] [Accepted: 11/20/2011] [Indexed: 11/29/2022]
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Cho JH, Rathnasingh C, Song H, Chung BW, Lee HJ, Seung D. Fermentation and evaluation of Klebsiella pneumoniae and K. oxytoca on the production of 2,3-butanediol. Bioprocess Biosyst Eng 2012; 35:1081-8. [DOI: 10.1007/s00449-012-0691-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2011] [Accepted: 01/18/2012] [Indexed: 11/24/2022]
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Liu Z, Qin J, Gao C, Hua D, Ma C, Li L, Wang Y, Xu P. Production of (2S,3S)-2,3-butanediol and (3S)-acetoin from glucose using resting cells of Klebsiella pneumonia and Bacillus subtilis. BIORESOURCE TECHNOLOGY 2011; 102:10741-4. [PMID: 21945208 DOI: 10.1016/j.biortech.2011.08.110] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2011] [Revised: 08/19/2011] [Accepted: 08/26/2011] [Indexed: 05/04/2023]
Abstract
Production of highly pure (2S,3S)-2,3-butanediol ((2S,3S)-2,3-BD) and (3S)-acetoin ((3S)-AC) in high concentrations is desirable but difficult to achieve. In the present study, glucose was first transformed to a mixture of (2S,3S)-2,3-BD and meso-2,3-BD by resting cells of Klebsiella pneumoniae CICC 10011, followed by biocatalytic resolution of the mixture by resting cells of Bacillus subtilis 168. meso-2,3-BD was transformed to (3S)-AC, leaving (2S,3S)-2,3-BD in the reaction medium. Using this approach, 12.5 g l(-1) (2S,3S)-2,3-BD and 56.7 g l(-1) (3S)-AC were produced. Stereoisomeric purity of (2S,3S)-2,3-BD and enantiomeric excess of (3S)-AC was 96.9 and 96.2%, respectively.
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Affiliation(s)
- Zhen Liu
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, People's Republic of China
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Ju X, Yu HL, Pan J, Xu JH. Improved production of Pseudomonas sp. ECU1011 acetyl esterase by medium design and fed-batch fermentation. Bioprocess Biosyst Eng 2011; 35:323-31. [PMID: 21792565 DOI: 10.1007/s00449-011-0570-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2011] [Accepted: 07/01/2011] [Indexed: 11/29/2022]
Abstract
We optimized culture medium and batch-fed fermentation conditions to enhance production of an acetyl esterase from Pseudomonas sp. ECU1011 (PSAE). This enzyme enantioselectively deacetylates α-acetoxyphenylacetic acid. The medium was redesigned by single-factor and statistical optimization. The addition of ZnSO(4) enhanced enzyme production by 37%. Yeast extract concentration was directly associated with the enzyme production. The fermentation was scaled up in a 5-l fermenter with the optimized medium, and the correlations between enzyme production and dissolved oxygen, pH, and feeding strategy were investigated. The fermentation process was highly oxygen-demanding, pH sensitive and mandelic acid-inducible. The fermentation pH was controlled at 7.5 by a pH and dissolved oxygen feedback strategy. Feeding mandelic acid as both a pH regulator and an enzyme inducer increased the enzyme production by 23%. The results of the medium redesign experiments were confirmed and explained in fed-batch culture experiments. Mathematical models describing the fermentation processes indicated that the enzyme production was strongly associated with cell growth. The optimized pH and dissolved oxygen stat fed-batch process resulted high volumetric production of PSAE (4166 U/l, 7.2-fold higher than the initial) without enantioselectivity decline. This process has potential applications for industrial production of chiral mandelic acid or its derivatives.
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Affiliation(s)
- Xin Ju
- Laboratory of Biocatalysis and Bioprocessing, State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, People's Republic of China
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