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Tekin N, Ertuğrul Karatay S, Dönmez G. Third generation biobutanol production by Clostridium beijerinckii in a medium containing mixotrophically cultivated Dunaliella salina biomass. Prep Biochem Biotechnol 2024; 54:483-493. [PMID: 37610720 DOI: 10.1080/10826068.2023.2248298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
This study aims the third generation biobutanol production in P2 medium supplemented D. salina biomass mixotrophically cultivated with marble waste (MW). The wastes derived from the marble industry contain approximately 90% of carbon-rich compounds. Microalgal growth in mixotrophic conditions was optimized in the 0.4-2 g/L of MW concentration range. The highest microalgal concentration was obtained as 0.481 g/L in the presence of 1 g/L MW. Furthermore, some important parameters for the production of biobutanol, such as microalgal cultivation conditions, initial mixotrophic microalgal biomass loading (50-300 g/L), and fermentation time (24-96 h) were optimized. The highest biobutanol, total ABE, biobutanol yield and productivity were determined as 11.88 g/L, 13.89 g/L, 0.331 g/g and 0.165 g/L/h at the end of 72 h in P2 medium including 60 g/L glucose and 200 g/L microalgal biomass cultivated in 1 g/L MW, respectively. The results show that D. salina is a suitable raw material for supporting Clostridium beijerinckii DSMZ 6422 cells on biobutanol production. To the best of our knowledge, this is the first study on the use of MW which is a promising feedstock on the mixotrophic cultivation of D. salina for biobutanol production.
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Affiliation(s)
- Nazlıhan Tekin
- Science Faculty, Biology Department, Ankara University, Beşevler, Turkey
| | | | - Gönül Dönmez
- Science Faculty, Biology Department, Ankara University, Beşevler, Turkey
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Jawad M, Wang H, Wu Y, Rehman O, Song Y, Xu R, Zhang Q, Gao H, Xue C. Lignocellulosic ethanol and butanol production by Saccharomyces cerevisiae and Clostridium beijerinckii co-culture using non-detoxified corn stover hydrolysate. J Biotechnol 2024; 379:1-5. [PMID: 37944902 DOI: 10.1016/j.jbiotec.2023.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 11/06/2023] [Indexed: 11/12/2023]
Abstract
Considering global economic and environmental -benefits, green renewable biofuels such as ethanol and butanol are considered as sustainable alternatives to fossil fuels. Thus, developing a co-culture strategy for ethanol and butanol production by Saccharomyces cerevisiae and Clostridium beijerinckii has emerged as a promising approach for biofuel production from lignocellulosic biomass. This study developed a co-culture of S. cerevisiae and C. beijerinckii for ethanol and butanol production from non-detoxified corn stover hydrolysate. By firstly inoculating 3 % S. cerevisiae and then 7 % C. beijerinckii with 8-10 h time intervals, the optimized co-culture process gave 24.0 g/L ABE (20.8 g/L ethanol and 2.4 g/L butanol), obtaining ABE yield and productivity of 0.421 g/g and 0.55 g/L/h. The demonstrated co-culture strategy made full use of hexose and pentose in hydrolysate and contributed to total yield and efficiency compared to conventional ethanol or ABE fermentation, indicating its great potential for developing economically feasible and sustainable bioalcohols production.
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Affiliation(s)
- Muhammad Jawad
- MOE Key Laboratory of Bio-Intelligent Manufacturing, Engineering Research Center of Application and Transformation for Synthetic Biology, School of Bioengineering, Dalian University of Technology, Dalian 116024, Liaoning, China
| | - Huan Wang
- MOE Key Laboratory of Bio-Intelligent Manufacturing, Engineering Research Center of Application and Transformation for Synthetic Biology, School of Bioengineering, Dalian University of Technology, Dalian 116024, Liaoning, China
| | - Youduo Wu
- MOE Key Laboratory of Bio-Intelligent Manufacturing, Engineering Research Center of Application and Transformation for Synthetic Biology, School of Bioengineering, Dalian University of Technology, Dalian 116024, Liaoning, China; Ningbo Institute of Dalian University of Technology, Ningbo 315016, China.
| | - Omama Rehman
- MOE Key Laboratory of Bio-Intelligent Manufacturing, Engineering Research Center of Application and Transformation for Synthetic Biology, School of Bioengineering, Dalian University of Technology, Dalian 116024, Liaoning, China
| | - Yongxiu Song
- Ningbo Institute of Dalian University of Technology, Ningbo 315016, China
| | - Rui Xu
- Yunnan Provincial Rural Energy Engineering Key Laboratory, Kunming 650600, China
| | - Quan Zhang
- SINOPEC Dalian Research Institute of Petroleum and Petrochemicals Co., Ltd., Dalian 116041, China
| | - Huipeng Gao
- SINOPEC Dalian Research Institute of Petroleum and Petrochemicals Co., Ltd., Dalian 116041, China
| | - Chuang Xue
- MOE Key Laboratory of Bio-Intelligent Manufacturing, Engineering Research Center of Application and Transformation for Synthetic Biology, School of Bioengineering, Dalian University of Technology, Dalian 116024, Liaoning, China; Ningbo Institute of Dalian University of Technology, Ningbo 315016, China.
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Liu S, Zhang K, Yu Y, Lian X, Jiang L, Meng F, Wang Y, Zhu X, Duan Y. Influence of medium modifications (optimization) on high nematicidal activity of the fermentation broth of Clostridium beijerinckii. Front Bioeng Biotechnol 2024; 11:1283112. [PMID: 38239919 PMCID: PMC10795176 DOI: 10.3389/fbioe.2023.1283112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 11/28/2023] [Indexed: 01/22/2024] Open
Abstract
Introduction: The nematode species Meloidogyne incognita has been responsible for significant financial losses within the agricultural sector. Nematophagous bacteria, characterised by their extensive distribution and broad spectrum of hosts, exhibit remarkable efficacy as natural antagonists against nematodes. Sneb518 (Clostridium beijerinckii) fermentation broth displayed substantial biocontrol activity against M. incognita in previous research. Optimizing fermentation conditions is a fundamental technique for dramatically enhancing end product performance. There has been no such study conducted yet on enhancing the nematicidal activities of Sneb518 (Clostridium beijerinckii) fermentation using response surface methodology (RSM). Methods: The influence of strain Sneb518 fermentation media and conditions on nematicidal activity was examined using the three-factor technique and a Plackett-Burman design, and the interaction between various fermentation factors was examined using a Box-Behnken design. The present study employed response surface methodology (RSM) to examine and enhance the nematicidal activity of Sneb518 culture filtrates by identifying and optimising the influential components. Results: Glucose, peanut cake flour, and potassium chloride as carbon, nitrogen, and inorganic salts displayed considerably increased nematicidal potential in the present study. Furthermore, the corrected mortality of J2 ranged from 52.24% to 91.15% when utilizing the Box-Behnken design. These findings clearly support the application of RSM for medium optimization. Moreover, the outcomes of the validation experiment corresponded to the model predictions. Discussion: This research has enhanced the biocontrol ability of C. beijerinckii to control M. incognita and this research has led to the advancement of new biocontrol agents.
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Affiliation(s)
- Shuang Liu
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, China
| | - Kejun Zhang
- Tianjin Vocational College of Bioengineering, Tianjin, China
| | - Yun Yu
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, China
| | - Xinglong Lian
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, China
| | - Lanyuwen Jiang
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, China
| | - Fanqi Meng
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, China
| | - Yuanyuan Wang
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, China
- Nematology Institute of Northern China, Shenyang Agricultural University, Shenyang, China
| | - Xiaofeng Zhu
- Nematology Institute of Northern China, Shenyang Agricultural University, Shenyang, China
| | - Yuxi Duan
- Nematology Institute of Northern China, Shenyang Agricultural University, Shenyang, China
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Khaonuan S, Jariyaboon R, Usmanbaha N, Cheirsilp B, Birkeland NK, Kongjan P. Potential of butanol production from Thailand marine macroalgae using Clostridium beijerinckii ATCC 10132-based ABE fermentation. Biotechnol J 2023; 18:e2300026. [PMID: 37339510 DOI: 10.1002/biot.202300026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 05/31/2023] [Accepted: 06/15/2023] [Indexed: 06/22/2023]
Abstract
The economical bio-butanol-based fermentation process is mainly limited by the high price of first-generation biomass, which is an intensive cost for the pretreatment of second-generation biomass. As third-generation biomass, marine macroalgae could be potentially advantageous for conversion to clean and renewable bio-butanol through acetone-butanol-ethanol (ABE) fermentation. In this study, butanol production from three macroalgae species (Gracilaria tenuistipitata, Ulva intestinalis, and Rhizoclonium sp.) by Clostridium beijerinckii ATCC 10132 was assessed comparatively. The enriched C beijerinckii ATCC 10132 inoculum produced a high butanol concentration of 14.07 g L-1 using 60 g L-1 of glucose. Among the three marine seaweed species, G. tenuistipitata exhibited the highest potential for butanol production (1.38 g L-1 ). Under the 16 conditions designed using the Taguchi method for low-temperature hydrothermal pretreatment (HTP) of G. tenuistipitata, the maximum reducing sugar yield rate of 57.6% and ABE yield of 19.87% were achieved at a solid to liquid (S/L) ratio of 120, temperature of 110°C, and holding time of 10 min (Severity factor, R0 1.29). In addition, pretreated G. tenuistipitata could be converted to 3.1 g L-1 of butanol using low-HTP at an S/L ratio of 50 g L-1 , temperature of 80°C (R0 0.11), and holding time of 5 min.
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Affiliation(s)
- Sireethorn Khaonuan
- Energy Technology Program, Faculty of Engineering, Prince of Songkla University, Songkhla, Thailand
- Bio-Mass Conversion to Energy and Chemicals (Bio-Mec) Research Unit, Faculty of Science and Technology, Prince of Songkla University, Pattani, Thailand
| | - Rattana Jariyaboon
- Bio-Mass Conversion to Energy and Chemicals (Bio-Mec) Research Unit, Faculty of Science and Technology, Prince of Songkla University, Pattani, Thailand
- Department of Science, Faculty of Science and Technology, Prince of Songkla University, Pattani, Thailand
| | - Nikannapas Usmanbaha
- Energy Technology Program, Faculty of Engineering, Prince of Songkla University, Songkhla, Thailand
- Bio-Mass Conversion to Energy and Chemicals (Bio-Mec) Research Unit, Faculty of Science and Technology, Prince of Songkla University, Pattani, Thailand
| | - Benjamas Cheirsilp
- Biotechnology for Bioresource Utilization Laboratory, Department of Industrial Biotechnology, Faculty of Agro-Industry, Prince of Songkla University, Hat-Yai, Songkhla, Thailand
| | | | - Prawit Kongjan
- Bio-Mass Conversion to Energy and Chemicals (Bio-Mec) Research Unit, Faculty of Science and Technology, Prince of Songkla University, Pattani, Thailand
- Department of Science, Faculty of Science and Technology, Prince of Songkla University, Pattani, Thailand
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Zhang Y, Li J, Yong YC, Fang Z, Yan H, Li J, Meng J. Highly selective butanol production by manipulating electron flow via cathodic electro-fermentation. Bioresour Technol 2023; 374:128770. [PMID: 36822560 DOI: 10.1016/j.biortech.2023.128770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 02/13/2023] [Accepted: 02/18/2023] [Indexed: 06/18/2023]
Abstract
Butanol production by solventogenic Clostridia shows great potential to combat the energy crisis, but is still challenged by low butanol selectivity and high downstream cost. In this study, a novel cathodic electro-fermentation (CEF) system mediated by methyl viologen (MV) was proposed and sequentially optimized to obtain highly selective butanol production. Under the optimal conditions (-0.60 V cathode potential, 0.50 mM MV, 30 g/L glucose), 7.17 ± 0.55 g/L butanol production were achieved with the yield of 0.32 ± 0.02 g/g. With the supplement of 4 g/L butyric acid as co-substrate, butanol production further improved to 13.14 ± 1.14 g/L with butanol yield and selectivity as high as 0.43 ± 0.01 g/g and 90.44 ± 1.66%, respectively. The polarized electrode enabled the unbalanced fermentation towards butanol formation and MV further inhibited hydrogen production, both of which contributed to the high-level butanol production and selectivity. The MV-mediated CEF system is a promising approach for cost-effective bio-butanol production.
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Affiliation(s)
- Yafei Zhang
- National Engineering Research Center for Safe Sludge Disposal and Resource Recovery, School of Environment, Harbin Institute of Technology, Harbin 150090, China; Biofuels Institute, School of Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Jianzheng Li
- National Engineering Research Center for Safe Sludge Disposal and Resource Recovery, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Yang-Chun Yong
- Biofuels Institute, School of Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Zhen Fang
- Biofuels Institute, School of Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Han Yan
- National Engineering Research Center for Safe Sludge Disposal and Resource Recovery, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Jiuling Li
- Australian Centre for Water and Environmental Biotechnology, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Jia Meng
- National Engineering Research Center for Safe Sludge Disposal and Resource Recovery, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
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Schoch T, Baur T, Kunz J, Stöferle S, Dürre P. Heterologous 1,3-Propanediol Production Using Different Recombinant Clostridium beijerinckii DSM 6423 Strains. Microorganisms 2023; 11:microorganisms11030784. [PMID: 36985357 PMCID: PMC10054281 DOI: 10.3390/microorganisms11030784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/14/2023] [Accepted: 03/16/2023] [Indexed: 03/30/2023] Open
Abstract
1,3-propanediol (1,3-PDO) is a valuable basic chemical, especially in the polymer industry to produce polytrimethylene terephthalate. Unfortunately, the production of 1,3-PDO mainly depends on petroleum products as precursors. Furthermore, the chemical routes have significant disadvantages, such as environmental issues. An alternative is the biobased fermentation of 1,3-PDO from cheap glycerol. Clostridium beijerinckii DSM 6423 was originally reported to produce 1,3-PDO. However, this could not be confirmed, and a genome analysis revealed the loss of an essential gene. Thus, 1,3-PDO production was genetically reinstalled. Genes for 1,3-PDO production from Clostridium pasteurianum DSM 525 and Clostridium beijerinckii DSM 15410 (formerly Clostridium diolis) were introduced into C. beijerinckii DSM 6423 to enable 1,3-PDO production from glycerol. 1,3-PDO production by recombinant C. beijerinckii strains were investigated under different growth conditions. 1,3-PDO production was only observed for C. beijerinckii [pMTL83251_Ppta-ack_1,3-PDO.diolis], which harbors the genes of C. beijerinckii DSM 15410. By buffering the growth medium, production could be increased by 74%. Furthermore, the effect of four different promoters was analyzed. The use of the constitutive thlA promoter from Clostridium acetobutylicum led to a 167% increase in 1,3-PDO production compared to the initial recombinant approach.
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Affiliation(s)
- Teresa Schoch
- Institut für Mikrobiologie und Biotechnologie, Universität Ulm, 89081 Ulm, Germany
| | - Tina Baur
- Institut für Mikrobiologie und Biotechnologie, Universität Ulm, 89081 Ulm, Germany
| | - Johanna Kunz
- Institut für Mikrobiologie und Biotechnologie, Universität Ulm, 89081 Ulm, Germany
| | - Sophia Stöferle
- Institut für Mikrobiologie und Biotechnologie, Universität Ulm, 89081 Ulm, Germany
| | - Peter Dürre
- Institut für Mikrobiologie und Biotechnologie, Universität Ulm, 89081 Ulm, Germany
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Zhao R, Dong W, Yang C, Jiang W, Tian J, Gu Y. Formate as a supplementary substrate facilitates sugar metabolism and solvent production by Clostridium beijerinckii NCIMB 8052. Synth Syst Biotechnol 2023; 8:196-205. [PMID: 36824491 PMCID: PMC9941364 DOI: 10.1016/j.synbio.2023.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/12/2023] [Accepted: 01/17/2023] [Indexed: 02/04/2023] Open
Abstract
Microbial utilization and conversion of organic one-carbon compounds, such as formate and methanol that can be easily produced from CO2, has emerged as an attractive approach for biorefinery. In this study, we discovered Clostridium beijerinckii NCIMB 8052, a typical solventogenic Clostridium strain, to be a native formate-utilizing bacterium. 13C isotope analysis showed that formate could be metabolized via both assimilation and dissimilation pathways in C. beijerinckii NCIMB 8052. Notably, the use of formate as the supplementary substrate by this strain could significantly enhance its glucose consumption and ABE (acetone-butanol-ethanol) production, largely due to the up-regulation of genes responsible for glycolysis and glucose transport under formate stress. Based on these findings, we further improved formate tolerance of C. beijerinckii NCIMB 8052 by adaptive laboratory evolution, generating an evolved strain Cbei-FA01. The Cbei-FA01 strain could produce 23.0 g/L of ABE solvents using glucose and formate as dual substrates, ∼50% higher than that of the wild-type strain under the same condition. Moreover, such a promotion effect of formate on ABE production by Cbei-FA01 was also observed in fermenting a glucose-xylose mixture. This work reveals a previously unreported role of formate in biological ABE production, providing a new approach to utilize this one-carbon source.
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Affiliation(s)
- Ran Zhao
- CAS-Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wenyue Dong
- CAS-Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Chen Yang
- CAS-Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Weihong Jiang
- CAS-Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Jinzhong Tian
- CAS-Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China,Corresponding author. 300 Fenglin Road, Shanghai, 200032, China.
| | - Yang Gu
- CAS-Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China,Corresponding author.
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Benito-Vaquerizo S, Nouse N, Schaap PJ, Hugenholtz J, Brul S, López-Contreras AM, Martins dos Santos VAP, Suarez-Diez M. Model-driven approach for the production of butyrate from CO 2/H 2 by a novel co-culture of C. autoethanogenum and C. beijerinckii. Front Microbiol 2022; 13:1064013. [PMID: 36620068 PMCID: PMC9815533 DOI: 10.3389/fmicb.2022.1064013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 12/05/2022] [Indexed: 12/24/2022] Open
Abstract
One-carbon (C1) compounds are promising feedstocks for the sustainable production of commodity chemicals. CO2 is a particularly advantageous C1-feedstock since it is an unwanted industrial off-gas that can be converted into valuable products while reducing its atmospheric levels. Acetogens are microorganisms that can grow on CO2/H2 gas mixtures and syngas converting these substrates into ethanol and acetate. Co-cultivation of acetogens with other microbial species that can further process such products, can expand the variety of products to, for example, medium chain fatty acids (MCFA) and longer chain alcohols. Solventogens are microorganisms known to produce MCFA and alcohols via the acetone-butanol-ethanol (ABE) fermentation in which acetate is a key metabolite. Thus, co-cultivation of an acetogen and a solventogen in a consortium provides a potential platform to produce valuable chemicals from CO2. In this study, metabolic modeling was implemented to design a new co-culture of an acetogen and a solventogen to produce butyrate from CO2/H2 mixtures. The model-driven approach suggested the ability of the studied solventogenic species to grow on lactate/glycerol with acetate as co-substrate. This ability was confirmed experimentally by cultivation of Clostridium beijerinckii on these substrates in batch serum bottles and subsequently in pH-controlled bioreactors. Community modeling also suggested that a novel microbial consortium consisting of the acetogen Clostridium autoethanogenum, and the solventogen C. beijerinckii would be feasible and stable. On the basis of this prediction, a co-culture was experimentally established. C. autoethanogenum grew on CO2/H2 producing acetate and traces of ethanol. Acetate was in turn, consumed by C. beijerinckii together with lactate, producing butyrate. These results show that community modeling of metabolism is a valuable tool to guide the design of microbial consortia for the tailored production of chemicals from renewable resources.
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Affiliation(s)
- Sara Benito-Vaquerizo
- Laboratory of Systems and Synthetic Biology, Wageningen University and Research, Wageningen, Netherlands
| | - Niels Nouse
- Molecular Biology and Microbial Food Safety, University of Amsterdam, Amsterdam, Netherlands
| | - Peter J. Schaap
- Laboratory of Systems and Synthetic Biology, Wageningen University and Research, Wageningen, Netherlands,UNLOCK Large Scale Infrastructure for Microbial Communities, Wageningen University and Research and Delft University of Technology, Wageningen, Netherlands
| | - Jeroen Hugenholtz
- Molecular Biology and Microbial Food Safety, University of Amsterdam, Amsterdam, Netherlands
| | - Stanley Brul
- Molecular Biology and Microbial Food Safety, University of Amsterdam, Amsterdam, Netherlands
| | - Ana M. López-Contreras
- Wageningen Food and Biobased Research, Wageningen University and Research, Wageningen, Netherlands
| | | | - Maria Suarez-Diez
- Laboratory of Systems and Synthetic Biology, Wageningen University and Research, Wageningen, Netherlands,*Correspondence: Maria Suarez-Diez ✉
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Lian X, Liu S, Jiang L, Bai X, Wang Y. Isolation and Characterization of Novel Biological Control Agent Clostridium beijerinckii against Meloidogyne incognita. Biology (Basel) 2022; 11. [PMID: 36552234 DOI: 10.3390/biology11121724] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/16/2022] [Accepted: 11/26/2022] [Indexed: 11/29/2022]
Abstract
One of the most severe soil-borne pathogens in the world is the root-knot nematode (Meloidogyne incognita). Biological control is gaining more importance as environmental awareness increases. Thus, keeping this in mind, a total of 712 bacterial strains were isolated from 117 rhizosphere soil samples and investigated for potential biological control activity against M. incognita. Strain Sneb518 (Clostridium beijerinckii) was identified as having solid biocontrol activity against M. incognita. Sneb518 demonstrated significant inhibition against M. incognita, with J2 mortality reaching 90.73% at 12 h and with eggs hatching at a rate of 6.00% at 24 h, compared to a hatchability level of 29.07% for the control. Additionally, Sneb518 was excellent for enhancing seed germination. The seeds coated with a fermentation broth containing Sneb518 efficiently boosted the germination rate to 88.49%. The effectiveness and stability of C. beijerinckii Sneb518 against M. incognita were then further evaluated in a greenhouse. According to the pot experiment data, Sneb518 considerably (p < 0.05) reduced the number of root galls and egg masses on roots and also significantly (p < 0.05) increased tomato plant growth. C. beijerinckii Sneb518-treated tomato seedlings exhibited 50.26% biocontrol effectiveness compared to the control group. Our results demonstrate that C. beijerinckii Sneb518 can be a potential biological control agent against root-knot nematode disease and a biomass enhancer. This research will give new options for the sustainable control of root-knot nematode disease in tomatoes and other host plants.
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Georgiev YN, Vasicek O, Dzhambazov B, Batsalova TG, Denev PN, Dobreva LI, Danova ST, Simova SD, Wold CW, Ognyanov MH, Paulsen BS, Krastanov AI. Structural Features and Immunomodulatory Effects of Water-Extractable Polysaccharides from Macrolepiota procera (Scop.) Singer. J Fungi (Basel) 2022; 8:848. [PMID: 36012836 DOI: 10.3390/jof8080848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/09/2022] [Accepted: 08/11/2022] [Indexed: 11/26/2022] Open
Abstract
Macrolepiota procera (MP) is an edible mushroom used in the treatment of diabetes, hypertension and inflammation. However, the structure and biological effects of its polysaccharides (PSs) are unclear. This study investigates the structural features of a PS complex from MP (MP-PSC), its immunomodulatory activities and effects on probiotic and pathogenic bacteria. MP-PSC was obtained by boiling water, and PSs were characterized by 2D NMR spectroscopy. The immunomodulatory effects on blood and derived neutrophils, other leukocytes, and murine macrophages were studied by flow cytometry, chemiluminescence, spectrophotometry, and ELISA. The total carbohydrate content of MP-PSC was 74.2%, with glycogen occupying 36.7%, followed by β-D-glucan, α-L-fuco-2-(1,6)-D-galactan, and β-D-glucomannan. MP-PSC (200 μg/mL) increased the number of CD14+ monocyte cells in the blood, after ex vivo incubation for 24 h. It dose-dependently (50–200 μg/mL) activated the spontaneous oxidative burst of whole blood phagocytes, NO, and interleukin 6 productions in RAW264.7 cells. MP-PSC exhibited a low antioxidant activity and failed to suppress the oxidative burst and NO generation, induced by inflammatory agents. It (2.0%, w/v) stimulated probiotic co-cultures and hindered the growth and biofilm development of Escherichia coli, Streptococcus mutans and Salmonella enterica. MP PSs can be included in synbiotics to test their immunostimulating effects on compromised immune systems and gut health.
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Adesanya Y, Atiyeh HK, Olorunsogbon T, Khanal A, Okonkwo CC, Ujor VC, Shah A, Ezeji TC. Viable strategies for enhancing acetone-butanol-ethanol production from non-detoxified switchgrass hydrolysates. Bioresour Technol 2022; 344:126167. [PMID: 34678446 DOI: 10.1016/j.biortech.2021.126167] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 10/13/2021] [Accepted: 10/17/2021] [Indexed: 06/13/2023]
Abstract
A process engineering strategy was investigated towards developing a viable scheme for effective conversion of hydrothermolysis pretreated non-detoxified switchgrass hydrolysates (SH) to acetone butanol ethanol (ABE) using a metabolically engineered strain of Clostridium beijerinckii NCIMB 8052, C. beijerinckii_AKR. The engineered strain was modified by homologous integration into the chromosome and constitutive expression of Cbei_3974, which encodes an aldo-keto reductase. Intermittent feeding strategy was employed in which fermentation was initiated with 30% of the SH and the remaining 70% SH was added when the optical density (OD600nm) of C. beijerinckii attained 0.5. The ABE (14.9 g/L) produced from non-detoxified SH by the inhibitor-tolerant C. beijerinckii_AKR was comparable to the P2-glucose control medium (14.7 g/L). Using intermittent feeding, wildtype and C. beijerinckii_AKR produced similar amounts of ABE (about 17.5 g/L). This shows that intermittent feeding strategy and C. beijerinckii_AKR enhanced ABE fermentation and eliminated the need for SH detoxification prior to fermentation.
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Affiliation(s)
- Yinka Adesanya
- Biosystems and Agricultural Engineering, Oklahoma State University, Stillwater, OK, USA
| | - Hasan K Atiyeh
- Biosystems and Agricultural Engineering, Oklahoma State University, Stillwater, OK, USA.
| | - Tinuola Olorunsogbon
- Department of Animal Science, The Ohio State University, and Ohio State Agricultural Research and Development Center, Wooster, OH, USA
| | - Asmita Khanal
- Department of Food, Agricultural and Biological Engineering, The Ohio State University, Wooster, OH, USA
| | - Christopher C Okonkwo
- Department of Animal Science, The Ohio State University, and Ohio State Agricultural Research and Development Center, Wooster, OH, USA
| | - Victor C Ujor
- Department of Food Science, University of Wisconsin-Madison, Maddison, WI, USA
| | - Ajay Shah
- Department of Food, Agricultural and Biological Engineering, The Ohio State University, Wooster, OH, USA
| | - Thaddeus C Ezeji
- Department of Animal Science, The Ohio State University, and Ohio State Agricultural Research and Development Center, Wooster, OH, USA
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12
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Patakova P, Branska B, Vasylkivska M, Jureckova K, Musilova J, Provaznik I, Sedlar K. Transcriptomic studies of solventogenic clostridia, Clostridium acetobutylicum and Clostridium beijerinckii. Biotechnol Adv 2021; 58:107889. [PMID: 34929313 DOI: 10.1016/j.biotechadv.2021.107889] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 12/10/2021] [Accepted: 12/14/2021] [Indexed: 12/13/2022]
Abstract
Solventogenic clostridia are not a strictly defined group within the genus Clostridium but its representatives share some common features, i.e. they are anaerobic, non-pathogenic, non-toxinogenic and endospore forming bacteria. Their main metabolite is typically 1-butanol but depending on species and culture conditions, they can form other metabolites such as acetone, isopropanol, ethanol, butyric, lactic and acetic acids, and hydrogen. Although these organisms were previously used for the industrial production of solvents, they later fell into disuse, being replaced by more efficient chemical production. A return to a more biological production of solvents therefore requires a thorough understanding of clostridial metabolism. Transcriptome analysis, which reflects the involvement of individual genes in all cellular processes within a population, at any given (sampling) moment, is a valuable tool for gaining a deeper insight into clostridial life. In this review, we describe techniques to study transcription, summarize the evolution of these techniques and compare methods for data processing and visualization of solventogenic clostridia, particularly the species Clostridium acetobutylicum and Clostridium beijerinckii. Individual approaches for evaluating transcriptomic data are compared and their contributions to advancements in the field are assessed. Moreover, utilization of transcriptomic data for reconstruction of computational clostridial metabolic models is considered and particular models are described. Transcriptional changes in glucose transport, central carbon metabolism, the sporulation cycle, butanol and butyrate stress responses, the influence of lignocellulose-derived inhibitors on growth and solvent production, and other respective topics, are addressed and common trends are highlighted.
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Affiliation(s)
- Petra Patakova
- University of Chemistry and Technology Prague, Technicka 5, 16628 Prague 6, Czech Republic.
| | - Barbora Branska
- University of Chemistry and Technology Prague, Technicka 5, 16628 Prague 6, Czech Republic
| | - Maryna Vasylkivska
- University of Chemistry and Technology Prague, Technicka 5, 16628 Prague 6, Czech Republic
| | | | - Jana Musilova
- Brno University of Technology, Technicka 10, 61600 Brno, Czech Republic
| | - Ivo Provaznik
- Brno University of Technology, Technicka 10, 61600 Brno, Czech Republic
| | - Karel Sedlar
- Brno University of Technology, Technicka 10, 61600 Brno, Czech Republic
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13
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Rivas-Astroza M, Paredes I, Guerrero K, Mau S, Quintero J, Gentina JC, Conejeros R, Aroca G. Kinetic model of Clostridium beijerinckii's Acetone-Butanol-Ethanol fermentation considering metabolically diverse cell types. J Biotechnol 2021; 342:1-12. [PMID: 34648892 DOI: 10.1016/j.jbiotec.2021.09.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 09/26/2021] [Accepted: 09/29/2021] [Indexed: 11/16/2022]
Abstract
Clostridium beijerinckii population branches into metabolically diverse cell types in batch cultures. Here, we present a new kinetic model of C. beijerinckii's Acetone-Butanol-Ethanol fermentation that considers three cell types: producers of acids (acidogenic), consumer of acids and producers of solvents (solventogenic), and spores cells. The model accurately recapitulates batch culture data. Also, the model estimates cell type-specific kinetic parameters, which can be helpful to improve the operation of the ABE fermentation and give a framework to study acidogenic and solventogenic metabolic pathways. To exemplify the latter, we used a constraint-based model to study how the ABE pathways are used among acidogenic and solventogenic cell types. We found that among both cell types, glycolytic production of ATP and consumption of NAD+ varies widely during the fermentation, with their maximum production/consumption rates happening when acidogenic and solventogenic growth rates were at their highest. However, acidogenic cells use the ABE pathway to contribute with an extra 12.5% of the total production of ATP, whereas solventogenic cell types use the ABE pathway to supply more than 75% of the demand for NAD+, alternating between the production of lactate and butyrate, being both coupled to the production of NAD+.
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Affiliation(s)
- Marcelo Rivas-Astroza
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, Chile.
| | - Iván Paredes
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, Chile
| | - Karlo Guerrero
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, Chile
| | - Silvia Mau
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, Chile
| | - Julián Quintero
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, Chile
| | - Juan Carlos Gentina
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, Chile
| | - Raúl Conejeros
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, Chile
| | - Germán Aroca
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, Chile
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14
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Fei P, Luo Y, Lai N, Wu H. Biosynthesis of (R)-3-hydroxybutyric acid from syngas-derived acetate in engineered Escherichia coli. Bioresour Technol 2021; 336:125323. [PMID: 34051572 DOI: 10.1016/j.biortech.2021.125323] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 05/17/2021] [Accepted: 05/18/2021] [Indexed: 06/12/2023]
Abstract
Acetate is a potential non-food carbon source for industrial production, coping with the shortage of food-based feedstocks. (R)-3-hydroxybutyric acid (R-3HB) can be used as an important chiral intermediate in the fine chemical and pharmaceutical industry. In this study, the R-3HB biosynthesis pathway was successfully constructed when genes of β-ketothiolase (phaA), acetoacetyl-CoA reductase (phaB) from Ralstonia eutropha, and propionyl-CoA transferases (pct) from Clostridium beijerinckii 8052 were introducedinto Escherichia coli. The effects of host E. coli strains, different propionyl-CoA transferases, and post-induction temperatures were investigated. The final concentration of R-3HB reached 0.86 g/L using acetate as the sole carbon source. Subsequently, a kind of culture broth containing the syngas-derived acetate was used to produce 1.02 g/L of R-3HB with a yield of 0.26 g/g. Inthis study, the engineered E. coli strain could efficiently utilize syngas-derived acetate to synthesize R-3HB.
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Affiliation(s)
- Peng Fei
- State Key Laboratory of Bioreactor Engineering, School of Biotechnology, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yuanchan Luo
- State Key Laboratory of Bioreactor Engineering, School of Biotechnology, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Ningyu Lai
- State Key Laboratory of Bioreactor Engineering, School of Biotechnology, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Hui Wu
- State Key Laboratory of Bioreactor Engineering, School of Biotechnology, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China; Shanghai Collaborative Innovation Center for Biomanufacturing Technology, 130 Meilong Road, Shanghai 200237, China; Key Laboratory of Bio-based Material Engineering of China National Light Industry Council, 130 Meilong Road, Shanghai 200237, China.
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15
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Lin L, Zhang Z, Tang H, Guo Y, Zhou B, Liu Y, Huang R, Du L, Pang H. Enhanced sucrose fermentation by introduction of heterologous sucrose transporter and invertase into Clostridium beijerinckii for acetone-butanol-ethanol production. R Soc Open Sci 2021; 8:201858. [PMID: 34567584 PMCID: PMC8456130 DOI: 10.1098/rsos.201858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 08/31/2021] [Indexed: 05/12/2023]
Abstract
A heterologous pathway for sucrose transport and metabolism was introduced into Clostridium beijerinckii to improve sucrose use for n-butanol production. The combined expression of StSUT1, encoding a sucrose transporter from potato (Solanum tuberosum), and SUC2, encoding a sucrose invertase from Saccharomyces cerevisiae, remarkably enhanced n-butanol production. With sucrose, sugarcane molasses and sugarcane juice as substrates, the C. beijerinckii strain harbouring StSUT1 and SUC2 increased acetone-butanol-ethanol production by 38.7%, 22.3% and 52.8%, respectively, compared with the wild-type strain. This is the first report to demonstrate enhanced sucrose fermentation due to the heterologous expression of a sucrose transporter and invertase in Clostridium. The metabolic engineering strategy used in this study can be widely applied in other microorganisms to enhance the production of high-value compounds from sucrose-based biomass.
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Affiliation(s)
- Lihua Lin
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzymatic Technology, College of Life Science and Technology, Guangxi University, Daxue Road No. 100, Nanning, Guangxi 530005, People's Republic of China
- Guangxi Key Laboratory of Bio-refinery, National Engineering Research Center for Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Daling Road No. 98, Nanning, Guangxi 530007, People's Republic of China
| | - Zhikai Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzymatic Technology, College of Life Science and Technology, Guangxi University, Daxue Road No. 100, Nanning, Guangxi 530005, People's Republic of China
| | - Hongchi Tang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzymatic Technology, College of Life Science and Technology, Guangxi University, Daxue Road No. 100, Nanning, Guangxi 530005, People's Republic of China
- Guangxi Key Laboratory of Bio-refinery, National Engineering Research Center for Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Daling Road No. 98, Nanning, Guangxi 530007, People's Republic of China
| | - Yuan Guo
- Guangxi Key Laboratory of Bio-refinery, National Engineering Research Center for Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Daling Road No. 98, Nanning, Guangxi 530007, People's Republic of China
| | - Bingqing Zhou
- Guangxi Key Laboratory of Bio-refinery, National Engineering Research Center for Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Daling Road No. 98, Nanning, Guangxi 530007, People's Republic of China
| | - Yi Liu
- Guangxi Key Laboratory of Bio-refinery, National Engineering Research Center for Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Daling Road No. 98, Nanning, Guangxi 530007, People's Republic of China
| | - Ribo Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzymatic Technology, College of Life Science and Technology, Guangxi University, Daxue Road No. 100, Nanning, Guangxi 530005, People's Republic of China
| | - Liqin Du
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzymatic Technology, College of Life Science and Technology, Guangxi University, Daxue Road No. 100, Nanning, Guangxi 530005, People's Republic of China
| | - Hao Pang
- Guangxi Key Laboratory of Bio-refinery, National Engineering Research Center for Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Daling Road No. 98, Nanning, Guangxi 530007, People's Republic of China
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16
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Zhang Y, Li J, Meng J, Sun K, Yan H. A neutral red mediated electro-fermentation system of Clostridium beijerinckii for effective co-production of butanol and hydrogen. Bioresour Technol 2021; 332:125097. [PMID: 33845318 DOI: 10.1016/j.biortech.2021.125097] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 03/25/2021] [Accepted: 03/26/2021] [Indexed: 06/12/2023]
Abstract
To enhance the co-production of butanol and hydrogen by the acetone-butanol-ethanol (ABE) fermentation of Clostridium beijerinckii, a novel cathodic electro-fermentation (CEF) system was constructed with neutral red (NR) as electron mediator. With the mediation of NR, production of butanol and hydrogen from glucose in the CEF system achieved 5.49 ± 0.28 g/L and 3.74 ± 0.16 L/L, 569.5% and 325.0% higher than that in the open circuit (OC) system, respectively. The butanol and hydrogen yield of 0.30 ± 0.02 g/g and 206.53 ± 8.20 mL/g was 172.7% and 71.4% higher than that in the OC system, respectively. The effective co-production of butanol and hydrogen in the NR-mediated CEF system was attributed to the cooperation of the introduced polarized electrode and the additional NR. With the control of the polarized electrode, a feasible ORP was available for the effective hydrogen production. And the additional NR had induced more carbon source and electrons to the synthesis of butanol.
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Affiliation(s)
- Yafei Zhang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China
| | - Jianzheng Li
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China
| | - Jia Meng
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China.
| | - Kai Sun
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China
| | - Han Yan
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China
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17
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Husakova M, Plechata M, Branska B, Patakova P. Effect of a Monascus sp. Red Yeast Rice Extract on Germination of Bacterial Spores. Front Microbiol 2021; 12:686100. [PMID: 34108955 PMCID: PMC8180847 DOI: 10.3389/fmicb.2021.686100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 04/27/2021] [Indexed: 11/14/2022] Open
Abstract
The pink-red color of traditional sausages (cured meat) is the result of nitrite addition and the formation of nitrosomyoglobin. However, the pleasant color of processed meat products is a side effect of nitrite addition while the main anticipated goal is to suppress the germination of clostridial spores. The fungus Monascus is known as a producer of oligoketide pigments, which are used in Asian countries, especially in China, for coloring foods, including meat products. Although, different biological activities of Monascus pigments have been tested and confirmed in many studies, their effect on germination of bacterial spores has never been investigated. This study is focused on testing the activity of red yeast rice (RYR) extract, containing monascin, rubropunctatin, rubropunctamine complexes and monascuspiloin as the main pigments, on germination of Clostridium and Bacillus spores. It was found that addition of nitrite alone, at the permitted concentration, had no effect on spore germination. However, the combined effects of nitrite with NaCl, tested after addition of pickling salt, was efficient in inhibiting the germination of C. beijerinckii spores but had no effect on B. subtilis spores. In contrast, total suppression of C. beijerinckii spore germination was reached after addition of RYR extract to the medium at a concentration of 2% v/v. For B. subtilis, total inhibition of spore germination was observed only after addition of 4% v/v RYR extract to the medium containing 1.3% w/w NaCl.
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Affiliation(s)
- Marketa Husakova
- Department of Biotechnology, University of Chemistry and Technology Prague, Prague, Czechia
| | - Michaela Plechata
- Department of Biotechnology, University of Chemistry and Technology Prague, Prague, Czechia
| | - Barbora Branska
- Department of Biotechnology, University of Chemistry and Technology Prague, Prague, Czechia
| | - Petra Patakova
- Department of Biotechnology, University of Chemistry and Technology Prague, Prague, Czechia
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18
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Ujor VC, Lai LB, Okonkwo CC, Gopalan V, Ezeji TC. Ribozyme-Mediated Downregulation Uncovers DNA Integrity Scanning Protein A (DisA) as a Solventogenesis Determinant in Clostridium beijerinckii. Front Bioeng Biotechnol 2021; 9:669462. [PMID: 34169065 PMCID: PMC8217750 DOI: 10.3389/fbioe.2021.669462] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 05/04/2021] [Indexed: 11/21/2022] Open
Abstract
Carbon catabolite repression (CCR) limits microbial utilization of lignocellulose-derived pentoses. To relieve CCR in Clostridium beijerinckii NCIMB 8052, we sought to downregulate catabolite control protein A (CcpA) using the M1GS ribozyme technology. A CcpA-specific ribozyme was constructed by tethering the catalytic subunit of Escherichia coli RNase P (M1 RNA) to a guide sequence (GS) targeting CcpA mRNA (M1GSCcpA). As negative controls, the ribozyme M1GSCcpA–Sc (constructed with a scrambled GSCcpA) or the empty plasmid pMTL500E were used. With a ∼3-fold knockdown of CcpA mRNA in C. beijerinckii expressing M1GSCcpA (C. beijerinckii_M1GSCcpA) relative to both controls, a modest enhancement in mixed-sugar utilization and solvent production was achieved. Unexpectedly, C. beijerinckii_M1GSCcpA–Sc produced 50% more solvent than C. beijerinckii_pMTL500E grown on glucose + arabinose. Sequence complementarity (albeit suboptimal) suggested that M1GSCcpA–Sc could target the mRNA encoding DNA integrity scanning protein A (DisA), an expectation that was confirmed by a 53-fold knockdown in DisA mRNA levels. Therefore, M1GSCcpA–Sc was renamed M1GSDisA. Compared to C. beijerinckii_M1GSCcpA and _pMTL500E, C. beijerinckii_M1GSDisA exhibited a 7-fold decrease in the intracellular c-di-AMP level after 24 h of growth and a near-complete loss of viability upon exposure to DNA-damaging antibiotics. Alterations in c-di-AMP-mediated signaling and cell cycling likely culminate in a sporulation delay and the solvent production gains observed in C. beijerinckii_M1GSDisA. Successful knockdown of the CcpA and DisA mRNAs demonstrate the feasibility of using M1GS technology as a metabolic engineering tool for increasing butanol production in C. beijerinckii.
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Affiliation(s)
- Victor Chinomso Ujor
- Fermentation Science Program, Department of Food Science, University of Wisconsin-Madison, Madison WI, United States
| | - Lien B Lai
- Department of Chemistry and Biochemistry, Center for RNA Biology, The Ohio State University, Columbus, OH, United States
| | - Christopher Chukwudi Okonkwo
- Department of Animal Sciences, Ohio State Agricultural Research and Development Center, The Ohio State University, Wooster, OH, United States
| | - Venkat Gopalan
- Department of Chemistry and Biochemistry, Center for RNA Biology, The Ohio State University, Columbus, OH, United States
| | - Thaddeus Chukwuemeka Ezeji
- Department of Animal Sciences, Ohio State Agricultural Research and Development Center, The Ohio State University, Wooster, OH, United States
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19
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Fonseca BC, Reginatto V, López-Linares JC, Lucas S, García-Cubero MT, Coca M. Ideal conditions of microwave-assisted acid pretreatment of sugarcane straw allow fermentative butyric acid production without detoxification step. Bioresour Technol 2021; 329:124929. [PMID: 33706176 DOI: 10.1016/j.biortech.2021.124929] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 02/25/2021] [Accepted: 02/26/2021] [Indexed: 06/12/2023]
Abstract
Sugarcane straw (SCS) was pretreated with dilute sulfuric acid assisted by microwave to magnify fermentable sugars and to minimize the concentration of inhibitors in the hydrolysates. The optimum conditions for maximum recovery of sugars were 162 °C and 0.6% (w/v) H2SO4. The low level of inhibitors, such as acetate (2.9 g/L) and total phenolics (1.4 g/L), in the SCS slurry from the pretreatment stage allowed the enzymatic hydrolysis and fermentation steps to occur without detoxification. Besides consuming the total sugar content (31.0 g/L), Clostridium beijerinckii Br21 was able to use acetate from the SCS hydrolysate, to give butyric acid at high conversion factor (0.49 g of butyric acid /g of sugar). The optimized pretreatment conditions spared acid, time, and the detoxification stage, making bio-butyric acid production from SCS extremely attractive.
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Affiliation(s)
- Bruna Constante Fonseca
- Department of Chemistry, University of São Paulo, Av. Bandeirantes, 3900, CEP 14040-901 Ribeirão Preto, Brazil
| | - Valeria Reginatto
- Department of Chemistry, University of São Paulo, Av. Bandeirantes, 3900, CEP 14040-901 Ribeirão Preto, Brazil.
| | - Juan Carlos López-Linares
- Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina s/n, Valladolid, Spain; Institute of Sustainable Processes, University of Valladolid, Spain
| | - Susana Lucas
- Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina s/n, Valladolid, Spain; Institute of Sustainable Processes, University of Valladolid, Spain
| | - M Teresa García-Cubero
- Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina s/n, Valladolid, Spain; Institute of Sustainable Processes, University of Valladolid, Spain
| | - Mónica Coca
- Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina s/n, Valladolid, Spain; Institute of Sustainable Processes, University of Valladolid, Spain
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20
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Seo SO, Lu T, Jin YS, Blaschek HP. A comparative phenotypic and genomic analysis of Clostridium beijerinckii mutant with enhanced solvent production. J Biotechnol 2021; 329:49-55. [PMID: 33556425 DOI: 10.1016/j.jbiotec.2021.02.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 01/24/2021] [Accepted: 02/01/2021] [Indexed: 12/14/2022]
Abstract
The acetone-butanol-ethanol (ABE) fermentation by solventogenic clostridia has a long history of industrial butanol production. The Clostridium beijerinckii mutant BA101 has been widely studied for ABE fermentation owing to its enhanced butanol production capacity. Here, we characterized the BA101 mutant under controlled environmental conditions in parallel with the parental strain C. beijerinckii NCIMB 8052. To investigate the correlation between phenotype and genotype, we carried out the genome sequencing of BA101. Through comparative genomic analysis, several mutations in the genes encoding transcriptional regulator, sensor kinase, and phosphatase were identified in the BA101 genome as well as other sibling mutants. Among them, the SNP in the Cbei_3078 gene encoding PAS/PAC sensor hybrid histidine kinase was unique to the BA101 strain. The identified mutations relevant to the observed physiological behaviors of BA101 could be potential genetic targets for rational engineering of solventogenic clostridia toward desired phenotypes.
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Affiliation(s)
- Seung-Oh Seo
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA; Department of Food Science and Nutrition, The Catholic University of Korea, Bucheon, 14662, Republic of Korea
| | - Ting Lu
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA; Department of Bioengineering and Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Yong-Su Jin
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA; Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
| | - Hans P Blaschek
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
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21
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Rambabu K, Bharath G, Thanigaivelan A, Das DB, Show PL, Banat F. Augmented biohydrogen production from rice mill wastewater through nano-metal oxides assisted dark fermentation. Bioresour Technol 2021; 319:124243. [PMID: 33254466 DOI: 10.1016/j.biortech.2020.124243] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/05/2020] [Accepted: 10/07/2020] [Indexed: 05/27/2023]
Abstract
This study highlights biohydrogen production enrichment through NiO and CoO nanoparticles (NPs) inclusion to dark fermentation of rice mill wastewater using Clostridium beijerinckii DSM 791. NiO (~26 nm) and CoO (~50 nm) NPs were intrinsically prepared via facile hydrothermal method with polyhedral morphology and high purity. Dosage dependency studies revealed the maximum biohydrogen production characteristics for 1.5 mg/L concentration of both NPs. Biohydrogen yield was improved by 2.09 and 1.9 folds higher for optimum dosage of NiO and CoO respectively, compared to control run without NPs. Co-metabolites analysis confirmed the biohydrogen production through acetate and butyrate pathways. Maximum COD reduction efficiencies of 77.6% and 69.5% were observed for NiO and CoO inclusions respectively, which were higher than control run (57.5%). Gompertz kinetic model fitted well with experimental data of NPs assisted fermentation. Thus, NiO and CoO inclusions to wastewater fermentation seems to be a promising technique for augmented biohydrogen production.
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Affiliation(s)
- K Rambabu
- Department of Chemical Engineering, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - G Bharath
- Department of Chemical Engineering, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - A Thanigaivelan
- Department of Chemical Engineering, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - D B Das
- Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, Leicestershire, UK
| | - Pau Loke Show
- Department of Chemical Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, 43500 Selangor Darul Ehsan, Malaysia.
| | - Fawzi Banat
- Department of Chemical Engineering, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
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22
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López-Linares JC, García-Cubero MT, Coca M, Lucas S. Efficient biobutanol production by acetone-butanol-ethanol fermentation from spent coffee grounds with microwave assisted dilute sulfuric acid pretreatment. Bioresour Technol 2021; 320:124348. [PMID: 33190095 DOI: 10.1016/j.biortech.2020.124348] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 10/26/2020] [Accepted: 10/27/2020] [Indexed: 06/11/2023]
Abstract
The integral valorization of potential sugars (cellulosic and hemicellulosic) from spent coffee grounds (SCG), a lignocellulosic residue, is proposed in this work. With this aim, the microwave assisted dilute sulfuric acid pretreatment has been optimized, leading to a hemicellulosic sugar recovery in the pretreatment liquid (HSRL) and an enzymatic hydrolysis yield of 79 and 98%, respectively, at 160.47 °C and 1.5% H2SO4. Moreover, the complete digestibility of cellulose (enzymatic hydrolysis yield = 100%) was also discovered for non-pretreated SCG, which is very interesting. Secondly, the production of biobutanol, an advanced biofuel, is also proposed from pretreated SCG enzymatic hydrolysate and pretreatment liquid achieved under optimal conditions. These were fermented by Clostridium beijerinckii, yielding 95 kg butanol/t SCG (dry matter) and 151 kg acetone-butanol-ethanol/t SCG (dry matter).
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Affiliation(s)
- Juan C López-Linares
- Institute of Sustainable Processes, Dr. Mergelina s/n, 47011 Valladolid, Spain; Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina, s/n, 47011 Valladolid, Spain
| | - María Teresa García-Cubero
- Institute of Sustainable Processes, Dr. Mergelina s/n, 47011 Valladolid, Spain; Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina, s/n, 47011 Valladolid, Spain
| | - Mónica Coca
- Institute of Sustainable Processes, Dr. Mergelina s/n, 47011 Valladolid, Spain; Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina, s/n, 47011 Valladolid, Spain
| | - Susana Lucas
- Institute of Sustainable Processes, Dr. Mergelina s/n, 47011 Valladolid, Spain; Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina, s/n, 47011 Valladolid, Spain.
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23
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Patakova P, Kolek J, Jureckova K, Branska B, Sedlar K, Vasylkivska M, Provaznik I. Deeper below the surface-transcriptional changes in selected genes of Clostridium beijerinckii in response to butanol shock. Microbiologyopen 2020; 10:e1146. [PMID: 33319506 PMCID: PMC7884928 DOI: 10.1002/mbo3.1146] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/27/2020] [Accepted: 11/30/2020] [Indexed: 01/04/2023] Open
Abstract
The main bottleneck in the return of industrial butanol production from renewable feedstock through acetone–butanol–ethanol (ABE) fermentation by clostridia, such as Clostridium beijerinckii, is the low final butanol concentration. The problem is caused by the high toxicity of butanol to the production cells, and therefore, understanding the mechanisms by which clostridia react to butanol shock is of key importance. Detailed analyses of transcriptome data that were obtained after butanol shock and their comparison with data from standard ABE fermentation have resulted in new findings, while confirmed expected population responses. Although butanol shock resulted in upregulation of heat shock protein genes, their regulation is different than was assumed based on standard ABE fermentation transcriptome data. While glucose uptake, glycolysis, and acidogenesis genes were downregulated after butanol shock, solventogenesis genes were upregulated. Cyclopropanation of fatty acids and formation of plasmalogens seem to be significant processes involved in cell membrane stabilization in the presence of butanol. Surprisingly, one of the three identified Agr quorum‐sensing system genes was upregulated. Upregulation of several putative butanol efflux pumps was described after butanol addition and a large putative polyketide gene cluster was found, the transcription of which seemed to depend on the concentration of butanol.
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Affiliation(s)
- Petra Patakova
- Department of Biotechnology, University of Chemistry and Technology Prague, Prague, Czech Republic
| | - Jan Kolek
- Department of Biotechnology, University of Chemistry and Technology Prague, Prague, Czech Republic
| | - Katerina Jureckova
- Department of Biomedical Engineering, Brno University of Technology, Brno, Czech Republic
| | - Barbora Branska
- Department of Biotechnology, University of Chemistry and Technology Prague, Prague, Czech Republic
| | - Karel Sedlar
- Department of Biomedical Engineering, Brno University of Technology, Brno, Czech Republic
| | - Maryna Vasylkivska
- Department of Biotechnology, University of Chemistry and Technology Prague, Prague, Czech Republic
| | - Ivo Provaznik
- Department of Biomedical Engineering, Brno University of Technology, Brno, Czech Republic
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24
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Patinios C, Lanza L, Corino I, Franssen MCR, Van der Oost J, Weusthuis RA, Kengen SWM. Eat1-Like Alcohol Acyl Transferases From Yeasts Have High Alcoholysis and Thiolysis Activity. Front Microbiol 2020; 11:579844. [PMID: 33193208 PMCID: PMC7658179 DOI: 10.3389/fmicb.2020.579844] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 10/09/2020] [Indexed: 11/13/2022] Open
Abstract
Esters are important flavor and fragrance compounds that are present in many food and beverage products. Many of these esters are produced by yeasts and bacteria during fermentation. While ester production in yeasts through the alcohol acyl transferase reaction has been thoroughly investigated, ester production through alcoholysis has been completely neglected. Here, we further analyze the catalytic capacity of the yeast Eat1 enzyme and demonstrate that it also has alcoholysis and thiolysis activities. Eat1 can perform alcoholysis in an aqueous environment in vitro, accepting a wide range of alcohols (C2-C10) but only a small range of acyl donors (C2-C4). We show that alcoholysis occurs in vivo in several Crabtree negative yeast species but also in engineered Saccharomyces cerevisiae strains that overexpress Eat1 homologs. The alcoholysis activity of Eat1 was also used to upgrade ethyl esters to butyl esters in vivo by overexpressing Eat1 in Clostridium beijerinckii. Approximately 17 mM of butyl acetate and 0.3 mM of butyl butyrate could be produced following our approach. Remarkably, the in vitro alcoholysis activity is 445 times higher than the previously described alcohol acyl transferase activity. Thus, alcoholysis is likely to affect the ester generation, both quantitatively and qualitatively, in food and beverage production processes. Moreover, mastering the alcoholysis activity of Eat1 may give rise to the production of novel food and beverage products.
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Affiliation(s)
- Constantinos Patinios
- Laboratory of Microbiology, Department of Agrotechnology and Food Sciences, Wageningen University and Research, Wageningen, Netherlands
- Laboratory of Bioprocess Engineering, Department of Agrotechnology and Food Sciences, Wageningen University and Research, Wageningen, Netherlands
| | - Lucrezia Lanza
- Laboratory of Microbiology, Department of Agrotechnology and Food Sciences, Wageningen University and Research, Wageningen, Netherlands
| | - Inge Corino
- Laboratory of Microbiology, Department of Agrotechnology and Food Sciences, Wageningen University and Research, Wageningen, Netherlands
| | - Maurice C. R. Franssen
- Laboratory of Organic Chemistry, Department of Agrotechnology and Food Sciences, Wageningen University and Research, Wageningen, Netherlands
| | - John Van der Oost
- Laboratory of Microbiology, Department of Agrotechnology and Food Sciences, Wageningen University and Research, Wageningen, Netherlands
| | - Ruud A. Weusthuis
- Laboratory of Bioprocess Engineering, Department of Agrotechnology and Food Sciences, Wageningen University and Research, Wageningen, Netherlands
| | - Servé W. M. Kengen
- Laboratory of Microbiology, Department of Agrotechnology and Food Sciences, Wageningen University and Research, Wageningen, Netherlands
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25
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Liu J, Jiang Y, Chen J, Yang J, Jiang W, Zhuang W, Ying H, Yang S. Metabolic Engineering and Adaptive Evolution of Clostridium beijerinckii To Increase Solvent Production from Corn Stover Hydrolysate. J Agric Food Chem 2020; 68:7916-7925. [PMID: 32614183 DOI: 10.1021/acs.jafc.0c03048] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The production of acetone-butanol-ethanol by solventogenic Clostridium using lignocellulosic biomass can be a potential alternative to petroleum-based butanol. However, previous studies on nondetoxified lignocellulose hydrolysate could not provide better results when compared to those in synthetic medium. In this study, we engineered the pentose pathway of Clostridium beijerinckii NCIMB 8052, which was then subjected to adaptive laboratory evolution in the gradient mixture of synthetic medium and pretreated corn stover enzymatic hydrolysate (CSH) prepared according to the National Renewable Energy Laboratory (NREL) standard. The final resultant strain CIBTS1274A produced 20.7 g/L of total solvents in NREL CSH diluted to 6% initial total sugars, supplemented with ammonium acetate. This performance was comparable with that of corn-based butanol. In addition, this strain was successfully used in the scale-up operation using nondetoxified corn stover and corncob hydrolysate at Lignicell Refining Biotechnologies Ltd., which once was the only commercial biobutanol industry in the world.
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Affiliation(s)
- Jinle Liu
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Yu Jiang
- Huzhou Center of Industrial Biotechnology, Shanghai Institutes of Biological Sciences, Chinese Academy of Sciences, Huzhou 313000, China
| | - Jun Chen
- Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Junjie Yang
- Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Weihong Jiang
- Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Wei Zhuang
- School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Hanjie Ying
- School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Sheng Yang
- Huzhou Center of Industrial Biotechnology, Shanghai Institutes of Biological Sciences, Chinese Academy of Sciences, Huzhou 313000, China
- Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
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26
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Wu J, Dong L, Liu B, Xing D, Zhou C, Wang Q, Wu X, Feng L, Cao G. A novel integrated process to convert cellulose and hemicellulose in rice straw to biobutanol. Environ Res 2020; 186:109580. [PMID: 32668543 DOI: 10.1016/j.envres.2020.109580] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 02/24/2020] [Accepted: 04/23/2020] [Indexed: 06/11/2023]
Abstract
A novel integrated process was established in this study to produce butanol from rice straw. In the first pretreatment, an alternative NaOH/Urea preatment operated at -12 oC efficiently removed 10.9 g lignin and preserved 91.54% cellulose and hemicellulose in 100 g rice straw. Subsequently, crude cellulase produced from Trichoderma viride was used to convert pretreated rice straw to mono-sugars for fermentation. The yields of glucose, xylose and arabiose obtained from 100 g rice straw were 31 g, 13.4 g and 0.48 g, respectively, resulting in a 69.45% saccharification efficiency of crude enzyme. Finally, to alleviate the carbon catabolite repression (CCR) and enhance butanol production, the coculture system of Clostridium beijerinckii and Saccharomyces cerevisiae was applied. Compared to monoculture of C. beijerinckii F-6, more sugars were consumed, especially the reduction rate of xylose reached to 81.87%, 32.99% higher than that in monoculture system. With more substrate facilitied into metabolism, the butanol concentration reached to 10.62 g/L corresponding to 0.28 g/g substrate, 115.38% higher than that in monoculture system. Overall, this integrated process was a low-energy consumption and efficient method for butanol production from rice straw.
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Affiliation(s)
- Jiwen Wu
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Lili Dong
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Bingfeng Liu
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Defeng Xing
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Chunshuang Zhou
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Qi Wang
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Xiukun Wu
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Liping Feng
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Guangli Cao
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China.
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27
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Cui Y, He J, Yang KL, Zhou K. Aerobic acetone-butanol-isopropanol (ABI) fermentation through a co-culture of Clostridium beijerinckii G117 and recombinant Bacillus subtilis 1A1. Metab Eng Commun 2020; 11:e00137. [PMID: 32612931 DOI: 10.1016/j.mec.2020.e00137] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 05/14/2020] [Accepted: 06/06/2020] [Indexed: 02/07/2023] Open
Abstract
An engineered B. subtilis 1A1 strain (BsADH2) expressing a secondary alcohol dehydrogenase (CpSADH) was co-cultured with C. beijerinckii G117 under an aerobic condition. During the fermentation on glucose, B. subtilis BsADH2 depleted oxygen in culture media completely and created an anaerobic environment for C. beijerinckii G117, an obligate anaerobe, to grow. Meanwhile, lactate produced by B. subtilis BsADH2 was re-assimilated by C. beijerinckii G117. In return, acetone produced by C. beijerinckii G117 was reduced into isopropanol by B. subtilis BsADH2 via expressing the CpSADH, which helped maintain the redox balance of the engineered B. subtilis. In the symbiotic system consisting of two strains, 1.7 g/L of acetone, 4.8 g/L of butanol, and 0.9 g/L of isopropanol (with an isopropanol/acetone ratio of 0.53) was produced from 60 g/L of glucose. This symbiotic system also worked when oxygen was supplied to the culture, although less isopropanol was produced (0.9 g/L of acetone, 4.9 g/L of butanol, and 0.2 g/L of isopropanol). The isopropanol titer was increased substantially to 2.5 g/L when we increased the inoculum size of B. subtilis BsADH2 and optimized other process parameters. With the Bacillus-Clostridium co-culture, switching from the original acetone-butanol (AB) fermentation to an aerobic acetone-butanol-isopropanol (ABI) fermentation can be easily achieved without genetic engineering of Clostridium. This strategy of employing a recombinant Bacillus to co-culture with Clostridium should be potentially useful to modify traditional acetone-butanol-ethanol fermentation for the production of other value-added chemicals. A secondary alcohol dehydrogenase was expressed in Bacillus subtilis. Acetone-butanol was upgraded into acetone-butanol-isopropanol by B. subtilis. A mutualistic relationship was established between B. subtilis and C. beijerinckii. Aerobic co-culture of B. subtilis and C. beijerinckii was achieved. Clostridium fermentation was improved by introducing a genetically-modified strain.
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28
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Xin X, Cheng C, Du G, Chen L, Xue C. Metabolic Engineering of Histidine Kinases in Clostridium beijerinckii for Enhanced Butanol Production. Front Bioeng Biotechnol 2020; 8:214. [PMID: 32266241 PMCID: PMC7098912 DOI: 10.3389/fbioe.2020.00214] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 03/03/2020] [Indexed: 12/31/2022] Open
Abstract
Clostridium beijerinckii, a promising industrial microorganism for butanol production, suffers from low butanol titer and lack of high-efficiency genetical engineering toolkit. A few histidine kinases (HKs) responsible for Spo0A phosphorylation have been demonstrated as functionally important components in regulating butanol biosynthesis in solventogenic clostridia such as C. acetobutylicum, but no study about HKs has been conducted in C. beijerinckii. In this study, six annotated but uncharacterized candidate HK genes sharing partial homologies (no less than 30%) with those in C. acetobutylicum were selected based on sequence alignment. The encoding region of these HK genes were deleted with CRISPR-Cas9n-based genome editing technology. The deletion of cbei2073 and cbei4484 resulted in significant change in butanol biosynthesis, with butanol production increased by 40.8 and 17.3% (13.8 g/L and 11.5 g/L vs. 9.8 g/L), respectively, compared to the wild-type. Faster butanol production rates were observed, with butanol productivity greatly increased by 40.0 and 20.0%, respectively, indicating these two HKs are important in regulating cellular metabolism in C. beijerinckii. In addition, the sporulation frequencies of two HKs inactivated strains decreased by 96.9 and 77.4%, respectively. The other four HK-deletion (including cbei2087, cbei2435, cbei4925, and cbei1553) mutant strains showed few phenotypic changes compared with the wild-type. This study demonstrated the role of HKs on sporulation and solventogenesis in C. beijerinckii, and provided a novel engineering strategy of HKs for improving metabolite production. The hyper-butanol-producing strains generated in this study have great potentials in industrial biobutanol production.
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Affiliation(s)
- Xin Xin
- School of Bioengineering, Dalian University of Technology, Dalian, China
| | - Chi Cheng
- School of Bioengineering, Dalian University of Technology, Dalian, China
| | - Guangqing Du
- School of Bioengineering, Dalian University of Technology, Dalian, China
| | - Lijie Chen
- School of Bioengineering, Dalian University of Technology, Dalian, China
| | - Chuang Xue
- School of Bioengineering, Dalian University of Technology, Dalian, China
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29
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Sun X, Atiyeh HK, Adesanya Y, Okonkwo C, Zhang H, Huhnke RL, Ezeji T. Feasibility of using biochar as buffer and mineral nutrients replacement for acetone-butanol-ethanol production from non-detoxified switchgrass hydrolysate. Bioresour Technol 2020; 298:122569. [PMID: 31862676 DOI: 10.1016/j.biortech.2019.122569] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 12/03/2019] [Accepted: 12/04/2019] [Indexed: 05/22/2023]
Abstract
Biochar can be an inexpensive pH buffer and source of mineral and trace metal nutrients in acetone-butanol-ethanol (ABE) fermentation. This study evaluated the feasibility of replacing expensive 4-morpholineethanesulfonic acid (MES) P2 buffer and mineral nutrients with biochar made from switchgrass (SGBC), forage sorghum (FSBC), redcedar (RCBC) and poultry litter (PLBC) for ABE fermentation. Fermentations using Clostridium beijerinckii ATCC 51743 in glucose and non-detoxified switchgrass hydrolysate media were performed at 35 °C in 250 mL bottles for 72 h. Medium containing buffer and minerals without biochar was the control. Similar ABE production (about 18.0 g/L) in glucose media with SGBC, FSBC and RCBC and control was measured. However in non-detoxified switchgrass hydrolysate medium, SGBC, RCBC and PLBC produced more ABE (about 18.5 g/L) than the control (10.1 g/L). This demonstrates that biochar is an effective buffer and mineral supplement for ABE production from lignocellulosic biomass without costly detoxification process.
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Affiliation(s)
- Xiao Sun
- Biosystems and Agricultural Engineering, Oklahoma State University, Stillwater, OK, USA
| | - Hasan K Atiyeh
- Biosystems and Agricultural Engineering, Oklahoma State University, Stillwater, OK, USA.
| | - Yinka Adesanya
- Biosystems and Agricultural Engineering, Oklahoma State University, Stillwater, OK, USA
| | - Christopher Okonkwo
- Department of Animal Science, The Ohio State University, and Ohio State Agricultural Research and Development Center, Wooster, OH, USA
| | - Hailin Zhang
- Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK, USA
| | - Raymond L Huhnke
- Biosystems and Agricultural Engineering, Oklahoma State University, Stillwater, OK, USA
| | - Thaddeus Ezeji
- Department of Animal Science, The Ohio State University, and Ohio State Agricultural Research and Development Center, Wooster, OH, USA
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30
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Wu J, Dong L, Zhou C, Liu B, Xing D, Feng L, Wu X, Wang Q, Cao G. Enhanced butanol-hydrogen coproduction by Clostridium beijerinckii with biochar as cell's carrier. Bioresour Technol 2019; 294:122141. [PMID: 31539856 DOI: 10.1016/j.biortech.2019.122141] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 09/06/2019] [Accepted: 09/07/2019] [Indexed: 06/10/2023]
Abstract
In this study, the effects of biochar on the fermentation performance of butanol-hydrogen coproduction by Clostridium beijerinckii F-6 were investigated. Results showed that the biochar with rich porous and graphitized structure can significantly promote the coproduction of butanol and hydrogen. The productivity of butanol and hydrogen reached 0.148 g/L/h and 0.299 mmol/L/h with biochar addition which were 20.23% and 48.76% higher than that in control without biochar addition, respectively. Moreover, the whole energy conversion efficiency calculated based on the heat value showed increment from 43.69% to 51.75% with biochar addition. Combined analysis of organic acids accumulation and oxidation-reduction potential fluctuation proved that biochar can regulate reducing power during fermentation and accelerate the conversion of acid phase to solvent phase. Scanning electron microscope images showed that biochar acted as carriers for cells absorption. Confirmation experiment further proved that biochar enhanced the butanol tolerant ability of Clostridium beijerinckii F-6.
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Affiliation(s)
- Jiwen Wu
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Lili Dong
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Chunshuang Zhou
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Bingfeng Liu
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Defeng Xing
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Liping Feng
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xiukun Wu
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Qi Wang
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Guangli Cao
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
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Reddy LV, Veda AS, Wee YJ. Utilization of banana crop residue as an agricultural bioresource for the production of acetone-butanol-ethanol by Clostridium beijerinckii YVU1. Lett Appl Microbiol 2019; 70:36-41. [PMID: 31631376 DOI: 10.1111/lam.13239] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 10/10/2019] [Accepted: 10/17/2019] [Indexed: 11/30/2022]
Abstract
This study aimed to produce acetone-butanol-ethanol (ABE) using lignocellulosic crop residues as renewable bioresources. Butanol production from banana crop residue (BCR) was studied using a newly isolated solventogenic Clostridium beijerinckii YVU1. BCR is one of the abundant lignocellulosic substrates available in tropical countries containing 4·3 ± 3·5% cellulose, 28·5 ± 3·0% hemicellulose and 20·3 ± 2·6% lignin. The sequential dilute alkali and acid pretreatments solubilized 69% of lignin and 73% of hemicellulose. Ten percent (w/v) of pretreated substrate was subjected to enzymatic saccharification with cellulase, and it was found to release 0·481 ± 0·035 g glucose per g pretreated biomass. In the batch fermentation process, 20·5 g l-1 ABE (14·0 g l-1 of butanol, 5·4 g l-1 of acetone and 1·1 g l-1 of ethanol) was obtained. The executed fermentation process yielded 0·39 g ABE per g hydrolysate with 0·14 g l-1 h-1 of volumetric productivity. On the basis of the results, we believe that sequential alkali and acid pretreatment on the enzymatic hydrolysis for butanol production is indeed a technology with the potential to be applied and newly isolated. C. beijerinckii YVU1 is also a potential candidate organism for butanol production agricultural residues. SIGNIFICANCE AND IMPACT OF THE STUDY: This study demonstrates that a banana crop residue (BCR) can be successfully utilized as an inexpensive and alternative bioresource for the production of acetone-butanol-ethanol (ABE). The sequential pretreatment of BCR with alkali and acid solubilized lignin and hemicellulose leading to high glucose release during enzymatic hydrolysis. A newly isolated Clostridium beijerinckii YVU1 was able to produce comparable amount of ABE with previous reports. Therefore, we can state that the utilization of BCR as substrate for C. beijerinckii YVU1 leads to an economical bioprocess for the microbial production of ABE.
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Affiliation(s)
- L Veeranjaneya Reddy
- Department of Food Science and Technology, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea.,Department of Microbiology, Yogi Vemana University, Kadapa, India
| | - A Shree Veda
- Department of Microbiology, Yogi Vemana University, Kadapa, India
| | - Y-J Wee
- Department of Food Science and Technology, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea
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Diallo M, Hocq R, Collas F, Chartier G, Wasels F, Wijaya HS, Werten MWT, Wolbert EJH, Kengen SWM, van der Oost J, Ferreira NL, López-Contreras AM. Adaptation and application of a two-plasmid inducible CRISPR-Cas9 system in Clostridium beijerinckii. Methods 2020; 172:51-60. [PMID: 31362039 DOI: 10.1016/j.ymeth.2019.07.022] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 07/22/2019] [Accepted: 07/25/2019] [Indexed: 11/22/2022] Open
Abstract
Recent developments in CRISPR technologies have opened new possibilities for improving genome editing tools dedicated to the Clostridium genus. In this study we adapted a two-plasmid tool based on this technology to enable scarless modification of the genome of two reference strains of Clostridium beijerinckii producing an Acetone/Butanol/Ethanol (ABE) or an Isopropanol/Butanol/Ethanol (IBE) mix of solvents. In the NCIMB 8052 ABE-producing strain, inactivation of the SpoIIE sporulation factor encoding gene resulted in sporulation-deficient mutants, and this phenotype was reverted by complementing the mutant strain with a functional spoIIE gene. Furthermore, the fungal cellulase-encoding celA gene was inserted into the C. beijerinckii NCIMB 8052 chromosome, resulting in mutants with endoglucanase activity. A similar two-plasmid approach was next used to edit the genome of the natural IBE-producing strain C. beijerinckii DSM 6423, which has never been genetically engineered before. Firstly, the catB gene conferring thiamphenicol resistance was deleted to make this strain compatible with our dual-plasmid editing system. As a proof of concept, our dual-plasmid system was then used in C. beijerinckii DSM 6423 ΔcatB to remove the endogenous pNF2 plasmid, which led to a sharp increase of transformation efficiencies.
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Jenol MA, Ibrahim MF, Kamal Bahrin E, Kim SW, Abd-Aziz S. Direct Bioelectricity Generation from Sago Hampas by Clostridium beijerinckii SR1 Using Microbial Fuel Cell. Molecules 2019; 24:molecules24132397. [PMID: 31261835 PMCID: PMC6651009 DOI: 10.3390/molecules24132397] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 05/22/2019] [Accepted: 05/24/2019] [Indexed: 11/16/2022] Open
Abstract
Microbial fuel cells offer a technology for simultaneous biomass degradation and biological electricity generation. Microbial fuel cells have the ability to utilize a wide range of biomass including carbohydrates, such as starch. Sago hampas is a starchy biomass that has 58% starch content. With this significant amount of starch content in the sago hampas, it has a high potential to be utilized as a carbon source for the bioelectricity generation using microbial fuel cells by Clostridium beijerinckii SR1. The maximum power density obtained from 20 g/L of sago hampas was 73.8 mW/cm2 with stable cell voltage output of 211.7 mV. The total substrate consumed was 95.1% with the respect of 10.7% coulombic efficiency. The results obtained were almost comparable to the sago hampas hydrolysate with the maximum power density 56.5 mW/cm2. These results demonstrate the feasibility of solid biomass to be utilized for the power generation in fuel cells as well as high substrate degradation efficiency. Thus, this approach provides a promising way to exploit sago hampas for bioenergy generation.
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Affiliation(s)
- Mohd Azwan Jenol
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Malaysia
| | - Mohamad Faizal Ibrahim
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Malaysia
| | - Ezyana Kamal Bahrin
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Malaysia
| | - Seung Wook Kim
- Department of Chemical and Biological Engineering, Korea University, Seoul 136-701, Korea
- Department of Chemistry, Faculty of Science and Technology, Universitas Airlangga, Surabaya 60115, Indonesia
| | - Suraini Abd-Aziz
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Malaysia.
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Dos Passos VF, Marcilio R, Aquino-Neto S, Santana FB, Dias ACF, Andreote FD, de Andrade AR, Reginatto V. Hydrogen and electrical energy co-generation by a cooperative fermentation system comprising Clostridium and microbial fuel cell inoculated with port drainage sediment. Bioresour Technol 2019; 277:94-103. [PMID: 30660066 DOI: 10.1016/j.biortech.2019.01.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 01/03/2019] [Accepted: 01/08/2019] [Indexed: 06/09/2023]
Abstract
This research work has succeeded in recovering energy from glucose by generating H2 with the aid of a Clostridium beijerinckii strain and obtaining electrical energy from compounds present in the H2 fermentation effluent in a microbial fuel cell (MFC) seeded with native port drainage sediment. In the fermentation step, 49.5% of the initial glucose concentration (56 mmol/L) was used to produce 104 mmol/L H2; 5, 33, 3, and 1 mmol/L acetate, butyrate, lactate, and ethanol also emerged, respectively. MFC tests by feeding the anodic compartment with acetate, butyrate, lactate (individually or as a mixture), or the H2 fermentation effluent provided power density values ranging between 0.6 and 1.2 W/m2. Acetate furnished the highest power density with a nanowire-rich biofilm despite the lowest anode bacterial concentration (1012 16S gene copies/g of sediment). Non-conventional exoelectrogenic microbial communities were observed in the acetate-fed MFC; e.g., Pseudomonadaceae (Pseudomonas) and Clostridia (Acidaminobacter, Fusibacter).
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Affiliation(s)
- Vinícius Fabiano Dos Passos
- Department of Chemistry, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Rafaella Marcilio
- Department of Chemistry, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Sidney Aquino-Neto
- Department of Chemistry, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | | | | | - Fenando Dini Andreote
- Luiz de Queiroz College of Agriculture - Department of Soil Science, University of São Paulo, Piracicaba, SP, Brazil
| | - Adalgisa Rodrigues de Andrade
- Department of Chemistry, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Valeria Reginatto
- Department of Chemistry, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
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Li Q, Seys FM, Minton NP, Yang J, Jiang Y, Jiang W, Yang S. CRISPR-Cas9 D10A nickase-assisted base editing in the solvent producer Clostridium beijerinckii. Biotechnol Bioeng 2019; 116:1475-1483. [PMID: 30739328 DOI: 10.1002/bit.26949] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 01/21/2019] [Accepted: 02/06/2019] [Indexed: 01/02/2023]
Abstract
Clostridium beijerinckii is a potentially important industrial microorganism as it can synthesize valuable chemicals and fuels from various carbon sources. The establishment of convenient to use, effective gene tools with which the organism can be rapidly modified is essential if its full potential is to be realized. Here, we developed a genomic editing tool (pCBEclos) for use in C. beijerinckii based on the fusion of cytidine deaminase (Apobec1), Cas9 D10A nickase and uracil DNA glycosylase inhibitor (UGI). Apobec1 and UGI are guided to the target site where they introduce specific base-pair substitutions through the conversion of C·G to T·A. By appropriate choice of target sequence, these nucleotide changes are capable of creating missense mutation or null mutations in a gene. Through optimization of pCBEclos, the system derived, pCBEclos-opt, has been used to rapidly generate four different mutants in C. beijerinckii, in pyrE, xylR, spo0A, and araR. The efficiency of the system was such that they could sometimes be directly obtained following transformation, otherwise only requiring one single restreaking step. Whilst CRISPR-Cas9 nickase systems, such as pNICKclos2.0, have previously been reported in C. beijerinckii, pCBEclos-opt does not rely on homologous recombination, a process that is intrinsically inefficient in clostridia such as C. beijerinckii. As a consequence, bulky editing templates do not need to be included in the knockout plasmids. This both reduces plasmid size and makes their construction simpler, for example, whereas the assembly of pNICKclos2.0 requires six primers for the assembly of a typical knockout plasmid, pCBEclos-opt requires just two primers. The pCBEclos-opt plasmid established here represents a powerful new tool for genome editing in C. beijerinckii, which should be readily applicable to other clostridial species.
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Affiliation(s)
- Qi Li
- College of Life Sciences, Sichuan Normal University, Chengdu, China.,Key Laboratory of Synthetic Biology, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - François M Seys
- Clostridia Research Group, BBSRC/EPSRC Synthetic Biology Research Centre (SBRC), School of Life Sciences, University of Nottingham, Nottingham, United Kingdom
| | - Nigel P Minton
- Clostridia Research Group, BBSRC/EPSRC Synthetic Biology Research Centre (SBRC), School of Life Sciences, University of Nottingham, Nottingham, United Kingdom
| | - Junjie Yang
- Key Laboratory of Synthetic Biology, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Yu Jiang
- Key Laboratory of Synthetic Biology, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Weihong Jiang
- Key Laboratory of Synthetic Biology, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Sheng Yang
- Key Laboratory of Synthetic Biology, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China.,Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing, China
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Zhang J, Hong W, Zong W, Wang P, Wang Y. Markerless genome editing in Clostridium beijerinckii using the CRISPR-Cpf1 system. J Biotechnol 2018; 284:27-30. [PMID: 30081040 DOI: 10.1016/j.jbiotec.2018.07.040] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 07/28/2018] [Accepted: 07/30/2018] [Indexed: 12/12/2022]
Abstract
CRISPR-Cpf1 is a type V CRISPR system that has recently been exploited for genome engineering purposes. Compared to the well-known Streptococcus pyogenes CRISPR-Cas9 system, the effector protein Cpf1 recognizes T-rich protospacer-adjacent motif (PAM) instead of G-rich PAM (used by CRISPR-Cas9), which could offer a substantial expansion of the existing genetic toolbox for genome editing. In this study, we report the implementation of the Acidaminococcus sp. Cpf1 (AsCpf1) for markerless genome engineering in Clostridium beijerinckii, a prominent species for biosolvent production through the well-known Acetone-Butanol-Ethanol (ABE) pathway. A lactose inducible promoter was used to control the expression of AsCpf1 to decrease its toxicity, while a constitutive small RNA promoter was employed to drive the expression of pre-crRNA. A One-Step-Assembly (OSA) approach was employed to construct the CRISPR-Cpf1-based vector in one single step, which simplified and streamlined the plasmid construction process. Using the customized CRISPR-Cpf1 system, we successfully deleted spo0A and pta genes in C. beijerinckii, with an editing efficiency of up to 100%. Altogether, our results demonstrated the easy programmability and high efficiency of the CRISPR-Cpf1 system for versatile genome engineering purposes. This study provides valuable guidance and essential references for repurposing the CRISPR-Cpf1 system for genome engineering in other microorganisms.
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Affiliation(s)
- Jie Zhang
- Department of Biosystems Engineering, Auburn University, Auburn, AL 36849, USA
| | - Wei Hong
- Department of Biosystems Engineering, Auburn University, Auburn, AL 36849, USA; Key Laboratory of Endemic and Ethnic Diseases (Guizhou Medical University), Ministry of Education, Guiyang 550000, China
| | - Wenming Zong
- Department of Biosystems Engineering, Auburn University, Auburn, AL 36849, USA; School of Engineering, Anhui Agricultural University, Hefei 230036, China
| | - Pixiang Wang
- Department of Biosystems Engineering, Auburn University, Auburn, AL 36849, USA
| | - Yi Wang
- Department of Biosystems Engineering, Auburn University, Auburn, AL 36849, USA; Center for Bioenergy and Bioproducts, Auburn University, Auburn, AL 36849, USA.
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Máté de Gérando H, Wasels F, Bisson A, Clement B, Bidard F, Jourdier E, López-Contreras AM, Lopes Ferreira N. Genome and transcriptome of the natural isopropanol producer Clostridium beijerinckii DSM6423. BMC Genomics 2018; 19:242. [PMID: 29636009 PMCID: PMC5894183 DOI: 10.1186/s12864-018-4636-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 03/28/2018] [Indexed: 12/23/2022] Open
Abstract
Background There is a worldwide interest for sustainable and environmentally-friendly ways to produce fuels and chemicals from renewable resources. Among them, the production of acetone, butanol and ethanol (ABE) or Isopropanol, Butanol and Ethanol (IBE) by anaerobic fermentation has already a long industrial history. Isopropanol has recently received a specific interest and the best studied natural isopropanol producer is C. beijerinckii DSM 6423 (NRRL B-593). This strain metabolizes sugars into a mix of IBE with only low concentrations of ethanol produced (< 1 g/L). However, despite its relative ancient discovery, few genomic details have been described for this strain. Research efforts including omics and genetic engineering approaches are therefore needed to enable the use of C. beijerinckii as a microbial cell factory for production of isopropanol. Results The complete genome sequence and a first transcriptome analysis of C. beijerinckii DSM 6423 are described in this manuscript. The combination of MiSeq and de novo PacBio sequencing revealed a 6.38 Mbp chromosome containing 6254 genomic objects. Three Mobile Genetic Elements (MGE) were also detected: a linear double stranded DNA bacteriophage (ϕ6423) and two plasmids (pNF1 and pNF2) highlighting the genomic complexity of this strain. A first RNA-seq transcriptomic study was then performed on 3 independent glucose fermentations. Clustering analysis allowed us to detect some key gene clusters involved in the main life cycle steps (acidogenesis, solvantogenesis and sporulation) and differentially regulated among the fermentation. These putative clusters included some putative metabolic operons comparable to those found in other reference strains such as C. beijerinckii NCIMB 8052 or C. acetobutylicum ATCC 824. Interestingly, only one gene was encoding for an alcohol dehydrogenase converting acetone into isopropanol, suggesting a single genomic event occurred on this strain to produce isopropanol. Conclusions We present the full genome sequence of Clostridium beijerinckii DSM 6423, providing a complete genetic background of this strain. This offer a great opportunity for the development of dedicated genetic tools currently lacking for this strain. Moreover, a first RNA-seq analysis allow us to better understand the global metabolism of this natural isopropanol producer, opening the door to future targeted engineering approaches. Electronic supplementary material The online version of this article (10.1186/s12864-018-4636-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hadrien Máté de Gérando
- Wageningen Food and Biobased Research, Bornse Weilanden 9, 6709WG, Wageningen, The Netherlands.,IFP Energies Nouvelles, 1 et 4 avenue de Bois-Préau, 92852, Rueil-Malmaison, France
| | - François Wasels
- IFP Energies Nouvelles, 1 et 4 avenue de Bois-Préau, 92852, Rueil-Malmaison, France
| | - Angélique Bisson
- IFP Energies Nouvelles, 1 et 4 avenue de Bois-Préau, 92852, Rueil-Malmaison, France
| | - Benjamin Clement
- IFP Energies Nouvelles, 1 et 4 avenue de Bois-Préau, 92852, Rueil-Malmaison, France
| | - Frédérique Bidard
- IFP Energies Nouvelles, 1 et 4 avenue de Bois-Préau, 92852, Rueil-Malmaison, France
| | - Etienne Jourdier
- IFP Energies Nouvelles, 1 et 4 avenue de Bois-Préau, 92852, Rueil-Malmaison, France
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Valenčíková R, Krascsenitsová E, Labajová N, Makroczyová J, Barák I. Clostridial DivIVA and MinD interact in the absence of MinJ. Anaerobe 2018; 50:22-31. [PMID: 29408597 DOI: 10.1016/j.anaerobe.2018.01.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 01/04/2018] [Accepted: 01/29/2018] [Indexed: 11/25/2022]
Abstract
One of the key regulators ensuring proper Z-ring placement in rod-shaped bacteria is the Min system. It does so by creating a concentration gradient of the MinC septation inhibitor along the cell axis. In Escherichia coli, this gradient is established by a MinE-mediated pole-to-pole oscillation of the MinCDE complex. In Bacillus subtilis, the creation of an inhibitory gradient relies on the MinJ and DivIVA pair of topological determinants, which target MinCD to the newly formed cell poles. Introducing the E. coli oscillating Min system into B. subtilis leads to a sporulation defect, suggesting that oscillation is incompatible with sporulation. However, Clostridia, close endospore-forming relatives of Bacilli, do encode oscillating Min homologues in various combinations together with homologues from the less dynamic B. subtilis Min system. Here we address the questions of how these two systems could exist side-by-side and how they influence one another by studying the Clostridium beijerinckii and Clostridium difficile Min systems. The toolbox of genetic manipulations and fluorescent protein fusions in Clostridia is limited, therefore B. subtilis and E. coli were chosen as heterologous systems for studying these proteins. In B. subtilis, MinD and DivIVA interact through MinJ; here, however, we discovered that the MinD and DivIVA proteins of both C. difficile, and C. beijerinckii, interact directly, which is surprising in the latter case, since that organism also encodes a MinJ homologue. We confirm this interaction using both in vitro and in vivo methods. We also show that C. beijerinckii MinJ is probably not in direct contact with DivIVACb and, unlike B. subtilis MinJ, does not mediate the MinDCb and DivIVACb interaction. Our results suggest that the Clostridia Min system uses a new mechanism of function.
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Affiliation(s)
- Romana Valenčíková
- Institute of Molecular Biology, Slovak Academy of Sciences, Dúbravská cesta 21, 845 51 Bratislava, Slovakia
| | - Eva Krascsenitsová
- Institute of Molecular Biology, Slovak Academy of Sciences, Dúbravská cesta 21, 845 51 Bratislava, Slovakia
| | - Naďa Labajová
- Institute of Molecular Biology, Slovak Academy of Sciences, Dúbravská cesta 21, 845 51 Bratislava, Slovakia
| | - Jana Makroczyová
- Institute of Molecular Biology, Slovak Academy of Sciences, Dúbravská cesta 21, 845 51 Bratislava, Slovakia
| | - Imrich Barák
- Institute of Molecular Biology, Slovak Academy of Sciences, Dúbravská cesta 21, 845 51 Bratislava, Slovakia.
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Zhang C, Li T, He J. Characterization and genome analysis of a butanol-isopropanol-producing Clostridium beijerinckii strain BGS1. Biotechnol Biofuels 2018; 11:280. [PMID: 30337959 PMCID: PMC6180514 DOI: 10.1186/s13068-018-1274-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 09/26/2018] [Indexed: 05/17/2023]
Abstract
BACKGROUND One of the main challenges of acetone-butanol-ethanol fermentation is to reduce acetone production with high butanol yield. Converting acetone into isopropanol is an alternative pathway to reduce fermentation by-products in the fermentation broth. Here, we aimed to cultivate a wild-type Clostridium strain with high isopropanol and butanol production and reveal its genome information. RESULTS Clostridium beijerinckii strain BGS1 was found to be capable of producing 10.21 g/L butanol and 3.41 g/L isopropanol, higher than previously known wild-type isopropanol-butanol-producing Clostridium species. Moreover, culture BGS1 exhibited a broad carbon spectrum utilizing diverse sugars such as arabinose, xylose, galactose, cellobiose, and sucrose, with 9.61 g/L butanol and 2.57 g/L isopropanol generated from 60 g/L sucrose and less amount from other sugars. Based on genome analysis, protein-based sequence of strain BGS1 was closer to C. beijerinckii NCIMB 8052, reaching 90.82% similarity, while compared to C. beijerinckii DSM 6423, the similarity was 89.53%. In addition, a unique secondary alcohol dehydrogenase (sAdhE) was revealed in the genome of strain BGS1, which distinguished it from other Clostridium species. Average nucleotide identity analysis identified strain BGS1 belonging to C. beijerinckii. The transcription profile and enzymatic activity of sAdhE proved its function of converting acetone into isopropanol. CONCLUSIONS Clostridium beijerinckii strain BGS1 is a potential candidate for industrial isopropanol and butanol production. Its genome provides unique information for genetic engineering of isopropanol-butanol-producing microorganisms.
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Affiliation(s)
- Chen Zhang
- Department of Civil and Environmental Engineering, National University of Singapore, Block E2-02-13, 1 Engineering Drive 3, Singapore, 117576 Singapore
| | - Tinggang Li
- Department of Civil and Environmental Engineering, National University of Singapore, Block E2-02-13, 1 Engineering Drive 3, Singapore, 117576 Singapore
| | - Jianzhong He
- Department of Civil and Environmental Engineering, National University of Singapore, Block E2-02-13, 1 Engineering Drive 3, Singapore, 117576 Singapore
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Gomez-Flores M, Nakhla G, Hafez H. Hydrogen production and microbial kinetics of Clostridium termitidis in mono-culture and co-culture with Clostridium beijerinckii on cellulose. AMB Express 2017; 7:84. [PMID: 28429329 PMCID: PMC5399015 DOI: 10.1186/s13568-016-0256-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Accepted: 09/24/2016] [Indexed: 11/10/2022] Open
Abstract
Cellulose utilization by hydrogen producers remains an issue due to the low hydrogen yields reported and the pretreatment of cellulose prior to fermentation requires complex and expensive steps. Clostridium termitidis is able to breakdown cellulose into glucose and produce hydrogen. On the other hand, Clostridium beijerinckii is not able to degrade cellulose but is adept at hydrogen production from glucose; therefore, it was chosen to potentially enhance hydrogen production when co-cultured with C. termitidis on cellulose. In this study, batch fermentation tests were conducted to investigate the direct hydrogen production enhancement of mesophilic cellulolytic bacteria C. termitidis co-cultured with mesophilic hydrogen producer C. beijerinckii on cellulose at 2 g l-1 compared to C. termitidis mono-culture. Microbial kinetics parameters were determined by modeling in MATLAB. The achieved highest hydrogen yield was 1.92 mol hydrogen mol-1 hexose equivalentadded in the co-culture compared to 1.45 mol hydrogen mol-1 hexose equivalentadded in the mono-culture. The maximum hydrogen production rate of 26 ml d-1 was achieved in the co-culture. Co-culture exhibited an overall 32 % enhancement of hydrogen yield based on hexose equivalent added and 15 % more substrate utilization. The main metabolites were acetate, ethanol, lactate, and formate in the mono-culture, with also butyrate in the co-culture. Additionally, the hydrogen yield of C. beijerinckii only in glucose was 2.54 mol hydrogen mol-1 hexose equivalent. This study has proved the viability of co-culture of C. termitidis with C. beijerinckii for hydrogen production directly from a complex substrate like cellulose under mesophilic conditions.
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Affiliation(s)
- Maritza Gomez-Flores
- Department of Chemical and Biochemical Engineering, Faculty of Engineering, University of Western Ontario, London, ON N6A 5B9 Canada
| | - George Nakhla
- Department of Chemical and Biochemical Engineering, Faculty of Engineering, University of Western Ontario, London, ON N6A 5B9 Canada
- Department of Civil and Environmental Engineering, Faculty of Engineering, University of Western Ontario, London, ON N6A 5B9 Canada
| | - Hisham Hafez
- Department of Civil and Environmental Engineering, Faculty of Engineering, University of Western Ontario, London, ON N6A 5B9 Canada
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Seo SO, Lu T, Jin YS, Blaschek HP. Development of an oxygen-independent flavin mononucleotide-based fluorescent reporter system in Clostridium beijerinckii and its potential applications. J Biotechnol 2017; 265:119-126. [PMID: 29158189 DOI: 10.1016/j.jbiotec.2017.11.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 11/02/2017] [Accepted: 11/06/2017] [Indexed: 12/21/2022]
Abstract
Clostridium beijerinckii is a predominant solventogenic clostridia with great attraction for renewable liquid biofuel and biochemical production. Metabolic engineering and synthetic biology can be employed to engineer the strain toward desirable phenotypes. However, current limited information such as promoter strength and gene regulation may hinder the efficient engineering of the strain. To investigate genetic information and complex cellular bioprocesses of C. beijerinckii, an in vivo fluorescence reporter system can be employed. In general, green fluorescence protein (GFP) and relative analogs have been widely used as real-time reporters. However, GFP-family proteins require molecular oxygen for fluorescence maturation. Considering the strict anaerobic growth requirement of the clostridia, an oxygen-independent fluorescence reporter such as a flavin mononucleotide-based fluorescent protein (FbFP) can be used as an alternative fluorescence reporter. In this study, we synthesized and expressed the codon-optimized FbFP gene for C. beijerinckii (CbFbFP) based on the nucleotide sequence of Bacillus subtilis YtvA variant EcFbFP in C. beijerinckii NCIMB 8052 wild-type. Protein expression and in vivo fluorescence of CbFbFP in C. beijeirnckii were confirmed under anaerobic growth conditions. Through fluorescence-activated cell sorting (FACS), we isolated the bright cells from the heterogenous population of C. beijerinckii cells expressing CbFbFP. Several mutations were found in the isolated plasmid which may be responsible for the high-level expression of CbFbFP in C. beijerinckii. The mutant plasmid and CbFbFP reporter were further utilized for strain selection, real-time fluorescence measurement, population analysis, and metabolic engineering in this study.
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Affiliation(s)
- Seung-Oh Seo
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Ting Lu
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Department of Bioengineering and Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Yong-Su Jin
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
| | - Hans P Blaschek
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
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Lu C, Yu L, Varghese S, Yu M, Yang ST. Enhanced robustness in acetone-butanol-ethanol fermentation with engineered Clostridium beijerinckii overexpressing adhE2 and ctfAB. Bioresour Technol 2017; 243:1000-1008. [PMID: 28747008 DOI: 10.1016/j.biortech.2017.07.043] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 07/05/2017] [Accepted: 07/06/2017] [Indexed: 06/07/2023]
Abstract
Clostridium beijerinckii CC101 was engineered to overexpress aldehyde/alcohol dehydrogenase (adhE2) and CoA-transferase (ctfAB). Solvent production and acid assimilation were compared between the parental and engineered strains expressing only adhE2 (CC101-SV4) and expressing adhE2, ald and ctfAB (CC101-SV6). CC101-SV4 showed an early butanol production from glucose but stopped pre-maturely at a low butanol concentration of ∼6g/L. Compared to CC101, CC101-SV6 produced more butanol (∼12g/L) from glucose and was able to re-assimilate more acids, which prevented "acid crash" and increased butanol production, under all conditions studied. CC101-SV6 also showed better ability in using glucose and xylose present in sugarcane bagasse hydrolysate, and produced 9.4g/L solvents (acetone, butanol and ethanol) compared to only 2.6g/L by CC101, confirming its robustness and better tolerance to hydrolysate inhibitors. The engineered strain of C. beijerinckii overexpressing adhE2 and ctfAB should have good potential for producing butanol from lignocellulosic biomass hydrolysates.
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Affiliation(s)
- Congcong Lu
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Ave., Columbus, OH 43210, United States
| | - Le Yu
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Ave., Columbus, OH 43210, United States
| | - Saju Varghese
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Ave., Columbus, OH 43210, United States
| | - Mingrui Yu
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Ave., Columbus, OH 43210, United States
| | - Shang-Tian Yang
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Ave., Columbus, OH 43210, United States.
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Nasr N, Gupta M, Hafez H, El Naggar MH, Nakhla G. Mono- and co-substrate utilization kinetics using mono- and co-culture of Clostridium beijerinckii and Clostridium saccharoperbutylacetonicum. Bioresour Technol 2017; 241:152-160. [PMID: 28554101 DOI: 10.1016/j.biortech.2017.05.086] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 05/14/2017] [Accepted: 05/15/2017] [Indexed: 06/07/2023]
Abstract
The effect of co-culturing C. beijerinckii and C. saccharoperbutylacetonicum for H2 production using mono- and co-substrates of glucose, starch, and cellulose was assessed. Monod kinetic parameters (K, maximum specific substrate utilization rate; and Ks, half-saturation constant) of the C. beijerinckii, C. saccharoperbutylacetonicum, and the co-culture were determined. Co-cultures utilizing glucose competed for the substrate, but showed enhancement for utilizing starch. The maximum values for K on glucose and starch were 0.48g substrate/gVSS.h achieved by C. saccharoperbutylacetonicum mono-culture and 0.39g substrate/gVSS.h achieved by the co-culture, respectively. The average Ks for all mono- and co-culture experiments was 0.93±0.03g/L. Acetate, butyrate, and propionate were the main fermentation products for all experiments. Maximum H2 production yields on glucose (2.69mol/molglucose) and starch (1.07mol/molhexose) were achieved by C. beijerinckii and C. saccharoperbutylacetonicum mono-cultures, respectively; however, neither culture was able to degrade cellulose as a mono-substrate.
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Affiliation(s)
- Noha Nasr
- Department of Civil and Environmental Engineering, Faculty of Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada
| | - Medhavi Gupta
- Department of Civil and Environmental Engineering, Faculty of Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada
| | - Hisham Hafez
- Department of Civil and Environmental Engineering, Faculty of Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada
| | - M Hesham El Naggar
- Department of Civil and Environmental Engineering, Faculty of Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada
| | - George Nakhla
- Department of Civil and Environmental Engineering, Faculty of Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada.
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Hou X, From N, Angelidaki I, Huijgen WJJ, Bjerre AB. Butanol fermentation of the brown seaweed Laminaria digitata by Clostridium beijerinckii DSM-6422. Bioresour Technol 2017; 238:16-21. [PMID: 28432948 DOI: 10.1016/j.biortech.2017.04.035] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 04/07/2017] [Accepted: 04/08/2017] [Indexed: 05/28/2023]
Abstract
Seaweed represents an abundant, renewable, and fast-growing biomass resource for 3rd generation biofuel production. This study reports an efficient butanol fermentation process carried out by Clostridium beijerinckii DSM-6422 using enzymatic hydrolysate of the sugar-rich brown seaweed Laminaria digitata harvested from the coast of the Danish North Sea as substrate. The highest butanol yield (0.42g/g-consumed-substrates) compared to literature was achieved, with a significantly higher butanol:acetone-butanol-ethanol (ABE) molar ratio (0.85) than typical (0.6). This demonstrates the possibility of using the seaweed L. digitata as a potential biomass for butanol production. For the first time, consumption of alginate components was observed by C. beijerinckii DSM-6422. The efficient utilization of sugars and lactic acid further highlighted the potential of using this strain for future development of large-scale cost-effective butanol production based on (ensiled) seaweed.
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Affiliation(s)
- Xiaoru Hou
- Section of Biomass Technology, Center of Bioresource and Biorefinery, Danish Technological Institute, Gregersensvej, DK-2630 Taastrup, Denmark.
| | - Nikolaj From
- Section of Biomass Technology, Center of Bioresource and Biorefinery, Danish Technological Institute, Gregersensvej, DK-2630 Taastrup, Denmark; Section of Residual Resource Engineering, Department of Environmental Engineering, Technical University of Denmark, Miljøvej, DK-2800, Kgs. Lyngby, Denmark
| | - Irini Angelidaki
- Section of Residual Resource Engineering, Department of Environmental Engineering, Technical University of Denmark, Miljøvej, DK-2800, Kgs. Lyngby, Denmark
| | - Wouter J J Huijgen
- Biomass & Energy Efficiency, Energy Research Centre of the Netherlands (ECN), Westerduinweg 3, 1755 LE Petten, The Netherlands
| | - Anne-Belinda Bjerre
- Section of Biomass Technology, Center of Bioresource and Biorefinery, Danish Technological Institute, Gregersensvej, DK-2630 Taastrup, Denmark
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Su H, Zhu J, Liu G, Tan F. Investigation of availability of a high throughput screening method for predicting butanol solvent -producing ability of Clostridium beijerinckii. BMC Microbiol 2016; 16:160. [PMID: 27448996 PMCID: PMC4957875 DOI: 10.1186/s12866-016-0776-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 07/12/2016] [Indexed: 11/23/2022] Open
Abstract
Background Currently, efficient screening methods for selection of desired bacterial phenotypes from large populations are not easy feasible or readily available due to the complicated physiological and metabolic networks of solventogenic clostridia. In this study, to contribute to the improvement of methods for predicting the butanol-producing ability of Clostridium beijerinckii based on starch substrate, we further investigate a simple, visualization screening method for selecting target strains from mutant library of Clostridium beijerinckii NCIMB 8052 by using trypan blue dye as an indicator in solid starch via statistical survey and validation of fermentation experiment with controlling pH. Results To verify an effective, efficient phenotypic screening method for isolating high butanol-producing mutants, the revalidation process was conducted based on Trypan Blue was used for visualization, and starch was used as the bacterial metabolic substrate. The availability of the screening system was further evaluated based on the relationship between characteristics of mutant strains and their α-amylase activities. Mutant clones were analyzed in detail based on their distinctive growth patterns and rate of fermentation of soluble starch to form butanol and were compared by statistical method. Significant correlations were identified between colony morphology and changes in butanol concentrations. The screening method was validated via statistical analysis for characterizing phenotypic parameters. The fermentation experiment of mutant strains with controlling pH value also demonstrated a positive correlation between increased α-amylase activity and increased solvent production by Clostridium beijerinckii was observed, and therefore indicated that the trypan blue dyeing method can be used as a fast method to screen target mutant strain for better solvent producers from, for instance, a mutant library. Conclusions The suitability of the novel screening procedure was validated, opening up a new indicator of approach to select mutant solventogenic clostridia with improved fermentation of starch to increase butanol concentrations. The applicability can easily be broadened to a wide range of interesting microbes such as cellulolytic or acetogenic microorganisms, which produce biofuels from feedstock rich in starch. Electronic supplementary material The online version of this article (doi:10.1186/s12866-016-0776-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- HaiFeng Su
- Enviromentally-Begnin Chemical Process Research Center, Division of Ecological & Enviromental Research on the Three Gorges, Chongqing Institute of Green and Interligent Technology, Chinese Academy of Science, Beijing, China
| | - Jun Zhu
- Rice Research Institute, Sichuan Agricultural University, 611130, Wenjiang, Sichuan, China
| | - Gang Liu
- Sichuan Academy of Grassland Science, Xipu Chengdu, 611731, Sichuan, Peoples Republic of China.
| | - Furong Tan
- Biogas Institute of Ministry of Agriculture, Chengdu, 610041, Sichuan, Peoples Republic of China.
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Agu CV, Ujor V, Gopalan V, Ezeji TC. Use of Cupriavidus basilensis-aided bioabatement to enhance fermentation of acid-pretreated biomass hydrolysates by Clostridium beijerinckii. J Ind Microbiol Biotechnol 2016; 43:1215-26. [PMID: 27400988 DOI: 10.1007/s10295-016-1798-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Accepted: 06/16/2016] [Indexed: 10/21/2022]
Abstract
Lignocellulose-derived microbial inhibitors (LDMICs) prevent efficient fermentation of Miscanthus giganteus (MG) hydrolysates to fuels and chemicals. To address this problem, we explored detoxification of pretreated MG biomass by Cupriavidus basilensis ATCC(®)BAA-699 prior to enzymatic saccharification. We document three key findings from our test of this strategy to alleviate LDMIC-mediated toxicity on Clostridium beijerinckii NCIMB 8052 during fermentation of MG hydrolysates. First, we demonstrate that growth of C. basilensis is possible on furfural, 5-hydroxymethyfurfural, cinnamaldehyde, 4-hydroxybenzaldehyde, syringaldehyde, vanillin, and ferulic, p-coumaric, syringic and vanillic acid, as sole carbon sources. Second, we report that C. basilensis detoxified and metabolized ~98 % LDMICs present in dilute acid-pretreated MG hydrolysates. Last, this bioabatement resulted in significant payoffs during acetone-butanol-ethanol (ABE) fermentation by C. beijerinckii: 70, 50 and 73 % improvement in ABE concentration, yield and productivity, respectively. Together, our results show that biological detoxification of acid-pretreated MG hydrolysates prior to fermentation is feasible and beneficial.
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Affiliation(s)
- Chidozie Victor Agu
- Department of Animal Sciences, Ohio State Agricultural Research and Development Center (OARDC), The Ohio State University, 305 Gerlaugh Hall, 1680 Madison Avenue, Wooster, OH, 44691, USA
| | - Victor Ujor
- Renewable Energy Program, Agricultural Technical Institute, The Ohio State University, 1328 Dover Road, Wooster, OH, 44691, USA
| | - Venkat Gopalan
- Department of Chemistry and Biochemistry, Center for RNA Biology, The Ohio State University, 484 West 12th Avenue, Columbus, OH, 43210, USA
| | - Thaddeus Chukwuemeka Ezeji
- Department of Animal Sciences, Ohio State Agricultural Research and Development Center (OARDC), The Ohio State University, 305 Gerlaugh Hall, 1680 Madison Avenue, Wooster, OH, 44691, USA.
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Gérando HMD, Fayolle-Guichard F, Rudant L, Millah SK, Monot F, Lopes Ferreira N, López-Contreras AM. Improving isopropanol tolerance and production of Clostridium beijerinckii DSM 6423 by random mutagenesis and genome shuffling. Appl Microbiol Biotechnol 2016; 100:5427-36. [PMID: 26852409 PMCID: PMC4875934 DOI: 10.1007/s00253-016-7302-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2015] [Revised: 01/04/2016] [Accepted: 01/06/2016] [Indexed: 12/26/2022]
Abstract
Random mutagenesis and genome shuffling was applied to improve solvent tolerance and isopropanol/butanol/ethanol (IBE) production in the strictly anaerobic bacteria Clostridium beijerinckii DSM 6423. Following chemical mutagenesis with N-methyl-N-nitro-N-nitrosoguanidine (NTG), screening of putatively improved strains was done by submitting the mutants to toxic levels of inhibitory chemicals or by screening for their tolerance to isopropanol (>35 g/L). Suicide substrates, such as ethyl or methyl bromobutyrate or alcohol dehydrogenase inhibitors like allyl alcohol, were tested and, finally, 36 mutants were isolated. The fermentation profiles of these NTG mutant strains were characterized, and the best performing mutants were used for consecutive rounds of genome shuffling. Screening of strains with further enhancement in isopropanol tolerance at each recursive shuffling step was then used to spot additionally improved strains. Three highly tolerant strains were finally isolated and able to withstand up to 50 g/L isopropanol on plates. Even if increased tolerance to the desired end product was not always accompanied by higher production capabilities, some shuffled strains showed increased solvent titers compared to the parental strains and the original C. beijerinckii DSM 6423. This study confirms the efficiency of genome shuffling to generate improved strains toward a desired phenotype such as alcohol tolerance. This tool also offers the possibility of obtaining improved strains of Clostridium species for which targeted genetic engineering approaches have not been described yet.
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Affiliation(s)
- H Máté de Gérando
- Food and Biobased Research Wageningen UR, Wageningen, the Netherlands
- Biotechnology Department, IFP Energies nouvelles, Rueil-Malmaison, France
| | - F Fayolle-Guichard
- Biotechnology Department, IFP Energies nouvelles, Rueil-Malmaison, France
| | - L Rudant
- Biotechnology Department, IFP Energies nouvelles, Rueil-Malmaison, France
| | - S K Millah
- Food and Biobased Research Wageningen UR, Wageningen, the Netherlands
| | - F Monot
- Biotechnology Department, IFP Energies nouvelles, Rueil-Malmaison, France
| | - N Lopes Ferreira
- Biotechnology Department, IFP Energies nouvelles, Rueil-Malmaison, France.
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Liu J, Guo T, Shen X, Xu J, Wang J, Wang Y, Liu D, Niu H, Liang L, Ying H. Engineering Clostridium beijerinckii with the Cbei_4693 gene knockout for enhanced ferulic acid tolerance. J Biotechnol 2016; 229:53-7. [PMID: 27164255 DOI: 10.1016/j.jbiotec.2016.04.052] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 04/25/2016] [Accepted: 04/28/2016] [Indexed: 11/22/2022]
Abstract
A mutant strain of Clostridium beijerinckii NCIMB 8052, C. beijerinckii M11, which exhibited ferulic acid tolerance up to 0.9g/L, was generated using atmospheric pressure glow discharge and high-throughput screening. Comparative genomic analysis revealed that this strain harbored a mutation of the Cbei_4693 gene, which encodes a hypothetical protein suspected to be an NADPH-dependent FMN reductase. After disrupting the Cbei_4693 gene in C. beijerinckii NCIMB 8052 using the ClosTron group II intron-based gene inactivation system, we obtained the Cbei_4693 gene inactivated mutant strain, C. beijerinckii 4693::int. Compared with C. beijerinckii NCIMB 8052, 6.23g/L of butanol was produced in P2 medium containing 0.5g/L of ferulic acid by 4693::int, and the ferulic acid tolerance was also significantly increased up to 0.8g/L. These data showed, for the first time, that the Cbei_4693 gene plays an important role in regulating ferulic acid tolerance in ABE fermentation by C. beijerinckii.
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Lv J, Jiao S, Du R, Zhang R, Zhang Y, Han B. Proteomic analysis to elucidate degeneration of Clostridium beijerinckii NCIMB 8052 and role of Ca(2+) in strain recovery from degeneration. J Ind Microbiol Biotechnol 2016; 43:741-50. [PMID: 27021843 DOI: 10.1007/s10295-016-1754-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 02/29/2016] [Indexed: 10/22/2022]
Abstract
Degeneration of solventogenic Clostridium strains is one of the major barriers in bio-butanol production. A degenerated Clostridium beijerinckii NCIMB 8052 strain (DG-8052) was obtained without any genetic manipulation. Supplementation of CaCO3 to fermentation medium could partially recover metabolism of DG-8052 by more than 50 % increase of cell growth and solvent production. This study investigated the protein expression profile of DG-8052 and its response to CaCO3 treatment. Compared with WT-8052, the lower expressed proteins were responsible for disruption of RNA secondary structures and DNA repair, sporulation, signal transduction, transcription regulation, and membrane transport in DG-8052. Interestingly, accompanied with the decreased glucose utilization and lower solvent production, there was a decreased level of sigma-54 modulation protein which may indicate that the level of sigma-54 activity may be associated with the observed strain degeneration. For the addition of CaCO3, proteomic and biochemical study results revealed that besides buffer capacity, Ca(2+) could stabilize heat shock proteins, increase DNA synthesis and replication, and enhance expression of solventogenic enzymes in DG-8052, which has a similar contribution in WT-8052.
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Affiliation(s)
- Jia Lv
- School of Public Health, Health Science Center, Xi'an Jiaotong University, NO. 76 Yanta West Road, P.O. 44, Xi'an, 710061, Shaanxi, China
| | - Shengyin Jiao
- School of Public Health, Health Science Center, Xi'an Jiaotong University, NO. 76 Yanta West Road, P.O. 44, Xi'an, 710061, Shaanxi, China
| | - Renjia Du
- School of Public Health, Health Science Center, Xi'an Jiaotong University, NO. 76 Yanta West Road, P.O. 44, Xi'an, 710061, Shaanxi, China
| | - Ruijuan Zhang
- School of Public Health, Health Science Center, Xi'an Jiaotong University, NO. 76 Yanta West Road, P.O. 44, Xi'an, 710061, Shaanxi, China.,Nutrition and Food Safety Engineering Research Center of Shaanxi Province, Xi'an, China
| | - Yan Zhang
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Bei Han
- School of Public Health, Health Science Center, Xi'an Jiaotong University, NO. 76 Yanta West Road, P.O. 44, Xi'an, 710061, Shaanxi, China. .,Nutrition and Food Safety Engineering Research Center of Shaanxi Province, Xi'an, China.
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50
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Miyake H, Maeda Y, Ishikawa T, Tanaka A. Calorimetric studies of the growth of anaerobic microbes. J Biosci Bioeng 2016; 122:364-9. [PMID: 27012376 DOI: 10.1016/j.jbiosc.2016.02.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 01/23/2016] [Accepted: 02/12/2016] [Indexed: 11/27/2022]
Abstract
This article aims to validate the use of calorimetry to measure the growth of anaerobic microbes. It has been difficult to monitor the growth of strict anaerobes while maintaining optimal growth conditions. Traditionally, optical density and ATP concentration are usually used as measures of the growth of anaerobic microbes. However, to take these measurements it is necessary to extract an aliquot of the culture, which can be difficult while maintaining anaerobic conditions. In this study, calorimetry was used to continuously and nondestructively measure the heat generated by the growth of anaerobic microbes as a function of time. Clostridium acetobutylicum, Clostridium beijerinckii, and Clostridium cellulovorans were used as representative anaerobic microbes. Using a multiplex isothermal calorimeter, we observed that peak time (tp) of C. acetobutylicum heat evolution increased as the inoculation rate decreased. This strong correlation between the inoculation rate and tp showed that it was possible to measure the growth rate of anaerobic microbes by calorimetry. Overall, our results showed that there is a very good correlation between heat evolution and optical density/ATP concentration, validating the use of the method.
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Affiliation(s)
- Hideo Miyake
- Graduate School of Bioresources, Mie University, 1577 Kurimamachiya-cho, Tsu, Mie 514-8507, Japan; Life Science Research Center, Mie University, 1577 Kurimamachiya-cho, Tsu, Mie 514-8507, Japan.
| | - Yukiko Maeda
- Faculty of Bioresources, Mie University, 1577 Kurimamachiya-cho, Tsu, Mie 514-8507, Japan
| | - Takashi Ishikawa
- Graduate School of Bioresources, Mie University, 1577 Kurimamachiya-cho, Tsu, Mie 514-8507, Japan
| | - Akiyoshi Tanaka
- Graduate School of Bioresources, Mie University, 1577 Kurimamachiya-cho, Tsu, Mie 514-8507, Japan
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