1
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Sahu N, Mahanty B, Haldar D. Challenges and opportunities in bioprocessing of gellan gum: A review. Int J Biol Macromol 2024; 276:133912. [PMID: 39025193 DOI: 10.1016/j.ijbiomac.2024.133912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 06/26/2024] [Accepted: 07/14/2024] [Indexed: 07/20/2024]
Abstract
Gellan gum (GG) - the microbial exopolysaccharide is increasingly being adopted into drug development, tissue engineering, and food and pharmaceutical products. In spite of the commercial importance and expanding application horizon of GG, little attention has been directed toward the exploration of novel microbial cultures, development of advanced screening protocols, strain engineering, and robust upstream or downstream processes. This comprehensive review not only attempts to summarize the existing knowledge pool on GG bioprocess but also critically assesses their inherent challenges. The process optimization design augmented with advanced machine learning modeling tools, widely adopted in other microbial bioprocesses, should be extended to GG. The unification of mechanistic insight into data-driven modeling would help to formulate optimal feeding and process control strategies.
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Affiliation(s)
- Nageswar Sahu
- Division of Biotechnology, School of Agricultural Sciences, Karunya Institute of Technology and Sciences, Coimbatore 641114, Tamil Nadu, India.
| | - Biswanath Mahanty
- Division of Biotechnology, School of Agricultural Sciences, Karunya Institute of Technology and Sciences, Coimbatore 641114, Tamil Nadu, India.
| | - Dibyajyoti Haldar
- Division of Biotechnology, School of Agricultural Sciences, Karunya Institute of Technology and Sciences, Coimbatore 641114, Tamil Nadu, India.
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2
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Diao M, Chen X, Li J, Shi Y, Yu B, Ma Z, Li J, Xie N. Metabolic Engineering of Escherichia coli for High-Level Production of ( R)-Acetoin from Low-Cost Raw Materials. Microorganisms 2023; 11:microorganisms11010203. [PMID: 36677495 PMCID: PMC9867144 DOI: 10.3390/microorganisms11010203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 01/09/2023] [Accepted: 01/10/2023] [Indexed: 01/15/2023] Open
Abstract
Acetoin is an important four-carbon platform chemical with versatile applications. Optically pure (R)-acetoin is more valuable than the racemate as it can be applied in the asymmetric synthesis of optically active α-hydroxy ketone derivatives, pharmaceuticals, and liquid crystal composites. As a cytotoxic solvent, acetoin at high concentrations severely limits culture performance and impedes the acetoin yield of cell factories. In this study, putative genes that may improve the resistance to acetoin for Escherichia coli were screened. To obtain a high-producing strain, the identified acetoin-resistance gene was overexpressed, and the synthetic pathway of (R)-acetoin was strengthened by optimizing the copy number of the key genes. The engineered E. coli strain GXASR-49RSF produced 81.62 g/L (R)-acetoin with an enantiomeric purity of 96.5% in the fed-batch fermentation using non-food raw materials in a 3-L fermenter. Combining the systematic approach developed in this study with the use of low-cost feedstock showed great potential for (R)-acetoin production via this cost-effective biotechnological process.
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Affiliation(s)
- Mengxue Diao
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Biomass Engineering Technology Research Center, Guangxi Academy of Sciences, 98 Daling Road, Nanning 530007, China
- Correspondence: (M.D.); (N.X.)
| | - Xianrui Chen
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Biomass Engineering Technology Research Center, Guangxi Academy of Sciences, 98 Daling Road, Nanning 530007, China
| | - Jing Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Life Science and Technology College, Guangxi University, Nanning 530004, China
| | - Ya’nan Shi
- CAS Key Laboratory of Microbial Physiological & Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Bo Yu
- CAS Key Laboratory of Microbial Physiological & Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Zhilin Ma
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Life Science and Technology College, Guangxi University, Nanning 530004, China
| | - Jianxiu Li
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Biomass Engineering Technology Research Center, Guangxi Academy of Sciences, 98 Daling Road, Nanning 530007, China
| | - Nengzhong Xie
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Biomass Engineering Technology Research Center, Guangxi Academy of Sciences, 98 Daling Road, Nanning 530007, China
- Correspondence: (M.D.); (N.X.)
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3
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Gu S, Zhang J, Li L, Zhong J. Repurposing the Endogenous CRISPR-Cas9 System for High-Efficiency Genome Editing in Lacticaseibacillus paracasei. ACS Synth Biol 2022; 11:4031-4042. [PMID: 36414383 DOI: 10.1021/acssynbio.2c00374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Lactobacilli such as Lacticaseibacillus (Lcb) paracasei are generally regarded as safe and health-promoting microbes, and have been widely applied in food and pharmaceutical industries. However, the genetic bases of their beneficial properties were mostly uncertain because of the lack of effective genetic manipulation tools. The type II CRISPR-Cas9 system is the largest family present in lactobacilli, but none of them yet have been developed for genetic modifications. Here, we establish the first endogenous CRISPR-Cas9 genome-editing system in lactobacilli. With a validated protospacer adjacent motif (PAM) and customized single guide RNA (sgRNA) expression cassette, the native CRISPR-Cas9 system was reprogrammed to achieve gene deletion and chromosomal insertion at over 90% efficiency, as well as nucleotide substitution at ≥50% efficiency. We also effectively accomplished deletions of large genomic fragments (5-10 kb) and simultaneous deletion of multiple genes at distal loci, both of which are the first cases in lactobacilli when either endogenous or exogenous CRISPR-Cas systems were employed. In addition, we designed a controllable plasmid-targeting sgRNA expression module and integrated it into the editing plasmid. The all-in-one vector realized gene deletion and plasmid curing at high efficiency (>90%). Collectively, the present study develops a convenient and precise genetic tool in Lcb. paracasei and contributes to the genetics and engineering of lactobacilli.
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Affiliation(s)
- Shujie Gu
- University of Chinese Academy of Sciences, Beijing 100039, China.,State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Jie Zhang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Lili Li
- University of Chinese Academy of Sciences, Beijing 100039, China.,State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Jin Zhong
- University of Chinese Academy of Sciences, Beijing 100039, China.,State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
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Son J, Baritugo KA, Lim SH, Lim HJ, Jeong S, Lee JY, Choi JI, Joo JC, Na JG, Park SJ. Microbial cell factories for the production of three-carbon backbone organic acids from agro-industrial wastes. BIORESOURCE TECHNOLOGY 2022; 349:126797. [PMID: 35122981 DOI: 10.1016/j.biortech.2022.126797] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 01/26/2022] [Accepted: 01/28/2022] [Indexed: 06/14/2023]
Abstract
At present, mass production of basic and valuable commodities is dependent on linear petroleum-based industries, which ultimately makes the depletion of finite natural reserves and accumulation of non-biodegradable and hazardous wastes. Therefore, an ecofriendly and sustainable solution should be established for a circular economy where infinite resources, such as agro-industrial wastes, are fully utilized as substrates in the production of target value-added chemicals. Hereby, recent advances in metabolic engineering strategies and techniques used in the development of microbial cell factories for enhanced production of three-carbon platform chemicals such as lactic acid, propionic acid, and 3-hydroxypropionic acid are discussed. Further developments and future perspectives in the production of these organic acids from agro-industrial wastes from the dairy, sugar, and biodiesel industries are also highlighted to demonstrate the importance of waste-based biorefineries for organic acid production.
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Affiliation(s)
- Jina Son
- Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Kei-Anne Baritugo
- Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Seo Hyun Lim
- Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Hye Jin Lim
- Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Seona Jeong
- Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Ji Yeon Lee
- Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Jong-Il Choi
- Department of Biotechnology and Bioengineering, Chonnam National University, Gwangju 61186, Korea
| | - Jeong Chan Joo
- Department of Biotechnology, The Catholic University of Korea, Bucheon-si, Gyeonggi-do 14662, Republic of Korea
| | - Jeong-Geol Na
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 04107, Republic of Korea
| | - Si Jae Park
- Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea.
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5
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Ma K, Cui Y, Zhao K, Yang Y, Wang Y, Hu G, He M. D-Lactic acid production from agricultural residues by membrane integrated continuous fermentation coupled with B vitamin supplementation. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2022; 15:24. [PMID: 35246204 PMCID: PMC8897852 DOI: 10.1186/s13068-022-02124-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 02/22/2022] [Indexed: 11/10/2022]
Abstract
Background d-Lactic acid played an important role in the establishment of PLA as a substitute for petrochemical plastics. But, so far, the d-lactic acid production was limited in only pilot scale, which was definitely unable to meet the fast growing market demand. To achieve industrial scale d-lactic acid production, the cost-associated problems such as high-cost feedstock, expensive nutrient sources and fermentation technology need to be resolved to establish an economical fermentation process. Results In the present study, the combined effect of B vitamin supplementation and membrane integrated continuous fermentation on d-lactic acid production from agricultural lignocellulosic biomass by Lactobacillus delbrueckii was investigated. The results indicated the specific addition of vitamins B1, B2, B3 and B5 (VB1, VB2, VB3 and VB5) could reduce the yeast extract (YE) addition from 10 to 3 g/l without obvious influence on fermentation efficiency. By employing cell recycling system in 350 h continuous fermentation with B vitamin supplementation, YE addition was further reduced to 0.5 g/l, which resulted in nutrient source cost reduction of 86%. A maximum d-lactate productivity of 18.56 g/l/h and optical purity of 99.5% were achieved and higher than most recent reports. Conclusion These findings suggested the novel fermentation strategy proposed could effectively reduce the production cost and improve fermentation efficiency, thus exhibiting great potential in promoting industrial scale d-lactic acid production from lignocellulosic biomass. Graphical Abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s13068-022-02124-y. High d-lactic acid productivity is achieved by L. delbrueckii from rice straw. B vitamins are satisfied substitute of yeast extract for d-lactic acid fermentation. A process of membrane-integrated continuous fermentation with B vitamin is developed. High fermentation efficiency is achieved by the novel fermentation process.
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Affiliation(s)
- Kedong Ma
- Key Laboratory of Biotechnology and Bioresources Utilization, Ministry of Education, Dalian Minzu University, Dalian, 116600, People's Republic of China.,College of Environment and Resources, Dalian Minzu University, Dalian, 116600, People's Republic of China.,Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture, Biomass Energy Technology Research Centre, Biogas Institute of Ministry of Agriculture, Chengdu, 610041, People's Republic of China
| | - Yubo Cui
- Key Laboratory of Biotechnology and Bioresources Utilization, Ministry of Education, Dalian Minzu University, Dalian, 116600, People's Republic of China. .,College of Environment and Resources, Dalian Minzu University, Dalian, 116600, People's Republic of China.
| | - Ke Zhao
- Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun, 130118, People's Republic of China
| | - Yuxuan Yang
- Key Laboratory of Biotechnology and Bioresources Utilization, Ministry of Education, Dalian Minzu University, Dalian, 116600, People's Republic of China.,College of Environment and Resources, Dalian Minzu University, Dalian, 116600, People's Republic of China
| | - Yidan Wang
- Key Laboratory of Biotechnology and Bioresources Utilization, Ministry of Education, Dalian Minzu University, Dalian, 116600, People's Republic of China.,College of Environment and Resources, Dalian Minzu University, Dalian, 116600, People's Republic of China
| | - Guoquan Hu
- Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture, Biomass Energy Technology Research Centre, Biogas Institute of Ministry of Agriculture, Chengdu, 610041, People's Republic of China
| | - Mingxiong He
- Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture, Biomass Energy Technology Research Centre, Biogas Institute of Ministry of Agriculture, Chengdu, 610041, People's Republic of China.
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Augustiniene E, Valanciene E, Matulis P, Syrpas M, Jonuskiene I, Malys N. Bioproduction of l- and d-lactic acids: advances and trends in microbial strain application and engineering. Crit Rev Biotechnol 2021; 42:342-360. [PMID: 34412525 DOI: 10.1080/07388551.2021.1940088] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Lactic acid is an important platform chemical used in the food, agriculture, cosmetic, pharmaceutical, and chemical industries. It serves as a building block for the production of polylactic acid (PLA), a biodegradable polymer, which can replace traditional petroleum-based plastics and help to reduce environmental pollution. Cost-effective production of optically pure l- and d-lactic acids is necessary to achieve a quality and thermostable PLA product. This paper evaluates research advances in the bioproduction of l- and d-lactic acids using microbial fermentation. Special emphasis is given to the development of metabolically engineered microbial strains and processes tailored to alternative and flexible feedstock concepts such as: lignocellulose, glycerol, C1-gases, and agricultural-food industry byproducts. Alternative fermentation concepts that can improve lactic acid production are discussed. The potential use of inducible gene expression systems for the development of biosensors to facilitate the screening and engineering of lactic acid-producing microorganisms is discussed.
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Affiliation(s)
- Ernesta Augustiniene
- Faculty of Chemical Technology, Bioprocess Research Centre, Kaunas University of Technology, Kaunas, Lithuania
| | - Egle Valanciene
- Faculty of Chemical Technology, Bioprocess Research Centre, Kaunas University of Technology, Kaunas, Lithuania
| | - Paulius Matulis
- Faculty of Chemical Technology, Bioprocess Research Centre, Kaunas University of Technology, Kaunas, Lithuania
| | - Michail Syrpas
- Faculty of Chemical Technology, Bioprocess Research Centre, Kaunas University of Technology, Kaunas, Lithuania
| | - Ilona Jonuskiene
- Faculty of Chemical Technology, Bioprocess Research Centre, Kaunas University of Technology, Kaunas, Lithuania
| | - Naglis Malys
- Faculty of Chemical Technology, Bioprocess Research Centre, Kaunas University of Technology, Kaunas, Lithuania
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Influence of Nitrogen Sources on D-Lactic Acid Biosynthesis by Sporolactobacillus laevolacticus DSM 442 Strain. FERMENTATION 2021. [DOI: 10.3390/fermentation7020078] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The purpose of this study was to explore the possibility of replacing an expensive yeast extract contained in the fermentation medium for D-lactic acid (D-LA, R-lactic acid) biosynthesis with an alternative nitrogen source. The screening studies were conducted under stationary conditions and showed that pea seed hydrolysate was the most beneficial substrate in the process of D-LA biosynthesis by the strain Sporolactobacillus laevolacticus DSM 442 among the used inorganic and organic nitrogen sources, waste materials, food and agricultural products. After 96 h, 75.5 g/L D-LA was obtained in batch cultures in a medium containing pea seed hydrolysate, with an average productivity of 0.79 g/L/h, yield of 75.5%, and optical purity of 99.4%. In batch cultures fed once, in a medium with an analogous composition, 122.6 g/L D-LA was obtained after 120 h, and the average yield, productivity and optical purity were 87.6%, 1.021 g/L/h, and 99.6%, respectively. Moreover, the amount of D-LA obtained in the fermentation medium enriched with the above-mentioned cheap agricultural product was similar to the amounts obtained in the medium containing yeast extract in both stationary and bioreactor cultures. Our research shows that hydrolyzed pea seeds, which belong to the legume family, may be a promising nitrogen source for the production of D-LA on an industrial scale.
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Vishnu Prasad J, Sahoo TK, Naveen S, Jayaraman G. Evolutionary engineering of Lactobacillus bulgaricus reduces enzyme usage and enhances conversion of lignocellulosics to D-lactic acid by simultaneous saccharification and fermentation. BIOTECHNOLOGY FOR BIOFUELS 2020; 13:171. [PMID: 33088341 PMCID: PMC7566127 DOI: 10.1186/s13068-020-01812-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Accepted: 10/06/2020] [Indexed: 05/31/2023]
Abstract
BACKGROUND Simultaneous saccharification and fermentation (SSF) of pre-treated lignocellulosics to biofuels and other platform chemicals has long been a promising alternative to separate hydrolysis and fermentation processes. However, the disparity between the optimum conditions (temperature, pH) for fermentation and enzyme hydrolysis leads to execution of the SSF process at sub-optimal conditions, which can affect the rate of hydrolysis and cellulose conversion. The fermentation conditions could be synchronized with hydrolysis optima by carrying out the SSF at a higher temperature, but this would require a thermo-tolerant organism. Economically viable production of platform chemicals from lignocellulosic biomass (LCB) has long been stymied because of the significantly higher cost of hydrolytic enzymes. The major objective of this work is to develop an SSF strategy for D-lactic acid (D-LA) production by a thermo-tolerant organism, in which the enzyme loading could significantly be reduced without compromising on the overall conversion. RESULTS A thermo-tolerant strain of Lactobacillus bulgaricus was developed by adaptive laboratory evolution (ALE) which enabled the SSF to be performed at 45 °C with reduced enzyme usage. Despite the reduction of enzyme loading from 15 Filter Paper Unit/gLCB (FPU/gLCB) to 5 FPU/gLCB, we could still achieve ~ 8% higher cellulose to D-LA conversion in batch SSF, in comparison to the conversion by separate enzymatic hydrolysis and fermentation processes at 45 °C and pH 5.5. Extending the batch SSF to SSF with pulse-feeding of 5% pre-treated biomass and 5 FPU/gLCB, at 12-h intervals (36th-96th h), resulted in a titer of 108 g/L D-LA and 60% conversion of cellulose to D-LA. This is one among the highest reported D-LA titers achieved from LCB. CONCLUSIONS We have demonstrated that the SSF strategy, in conjunction with evolutionary engineering, could drastically reduce enzyme requirement and be the way forward for economical production of platform chemicals from lignocellulosics. We have shown that fed-batch SSF processes, designed with multiple pulse-feedings of the pre-treated biomass and enzyme, can be an effective way of enhancing the product concentrations.
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Affiliation(s)
- J. Vishnu Prasad
- Bioprocess and Metabolic Engineering Laboratory, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036 India
| | - Tridweep K. Sahoo
- Bioprocess and Metabolic Engineering Laboratory, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036 India
| | - S. Naveen
- Present Address: Indian Institute of Technology, BHU, Varanasi, India
| | - Guhan Jayaraman
- Bioprocess and Metabolic Engineering Laboratory, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036 India
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Integrated and Consolidated Review of Plastic Waste Management and Bio-Based Biodegradable Plastics: Challenges and Opportunities. SUSTAINABILITY 2020. [DOI: 10.3390/su12208360] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cumulative plastic production worldwide skyrocketed from about 2 million tonnes in 1950 to 8.3 billion tonnes in 2015, with 6.3 billion tonnes (76%) ending up as waste. Of that waste, 79% is either in landfills or the environment. The purpose of the review is to establish the current global status quo in the plastics industry and assess the sustainability of some bio-based biodegradable plastics. This integrative and consolidated review thus builds on previous studies that have focused either on one or a few of the aspects considered in this paper. Three broad items to strongly consider are: Biodegradable plastics and other alternatives are not always environmentally superior to fossil-based plastics; less investment has been made in plastic waste management than in plastics production; and there is no single solution to plastic waste management. Some strategies to push for include: increasing recycling rates, reclaiming plastic waste from the environment, and bans or using alternatives, which can lessen the negative impacts of fossil-based plastics. However, each one has its own challenges, and country-specific scientific evidence is necessary to justify any suggested solutions. In conclusion, governments from all countries and stakeholders should work to strengthen waste management infrastructure in low- and middle-income countries while extended producer responsibility (EPR) and deposit refund schemes (DPRs) are important add-ons to consider in plastic waste management, as they have been found to be effective in Australia, France, Germany, and Ecuador.
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Abedi E, Hashemi SMB. Lactic acid production - producing microorganisms and substrates sources-state of art. Heliyon 2020; 6:e04974. [PMID: 33088933 PMCID: PMC7566098 DOI: 10.1016/j.heliyon.2020.e04974] [Citation(s) in RCA: 106] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/08/2020] [Accepted: 09/16/2020] [Indexed: 01/18/2023] Open
Abstract
Lactic acid is an organic compound produced via fermentation by different microorganisms that are able to use different carbohydrate sources. Lactic acid bacteria are the main bacteria used to produce lactic acid and among these, Lactobacillus spp. have been showing interesting fermentation capacities. The use of Bacillus spp. revealed good possibilities to reduce the fermentative costs. Interestingly, lactic acid high productivity was achieved by Corynebacterium glutamicum and E. coli, mainly after engineering genetic modification. Fungi, like Rhizopus spp. can metabolize different renewable carbon resources, with advantageously amylolytic properties to produce lactic acid. Additionally, yeasts can tolerate environmental restrictions (for example acidic conditions), being the wild-type low lactic acid producers that have been improved by genetic manipulation. Microalgae and cyanobacteria, as photosynthetic microorganisms can be an alternative lactic acid producer without carbohydrate feed costs. For lactic acid production, it is necessary to have substrates in the fermentation medium. Different carbohydrate sources can be used, from plant waste as molasses, starchy, lignocellulosic materials as agricultural and forestry residues. Dairy waste also can be used by the addition of supplementary components with a nitrogen source.
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Affiliation(s)
- Elahe Abedi
- Department of Food Science and Technology, College of Agriculture, Fasa University, Fasa, Iran
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11
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Beitel SM, Coelho LF, Contiero J. Efficient Conversion of Agroindustrial Waste into D(-) Lactic Acid by Lactobacillus delbrueckii Using Fed-Batch Fermentation. BIOMED RESEARCH INTERNATIONAL 2020; 2020:4194052. [PMID: 32382549 PMCID: PMC7193294 DOI: 10.1155/2020/4194052] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 01/27/2020] [Accepted: 03/04/2020] [Indexed: 11/18/2022]
Abstract
PURPOSE The goal of this paper is to describe the green conversion of agricultural waste products, such as molasses and corn steep liquor, into large amounts of D(-) lactic acid using a facilitated multipulse fed-batch strategy and affordable pH neutralizer. This is a very low-cost process because there is no need for hydrolysis of the waste products. The fed-batch strategy increases lactic acid productivity by avoiding inhibition caused by a high initial substrate concentration, and the selected controlling agent prevents cell stress that could be caused by high osmotic pressure of the culture media. METHODS The effects of different carbon and nitrogen sources on lactic acid production were investigated, and the best concentrations of the medium components were determined. To optimize the culture conditions of the Lactobacillus delbrueckii strain, the effects of pH control, temperature, neutralizing agent, agitation, and inoculum size in batch cultures were investigated. Fed-batch strategies were also studied to improve production and productivity. RESULT A high titer of D(-) lactic acid (162g/liter) was achieved after 48 hours of fermentation. Productivity at this point was 3.37 g/L·h. The optimum conditions were a temperature of 39°C, pH 5.5 controlled by the addition of Ca(OH)2, agitation at 150 rpm, and inoculum size of 25% (v/v). CONCLUSION The production of high optical purity D(-) lactic acid through L. delbrueckii fermentation with molasses and corn steep liquor is a promising economical alternative process that can be performed on the industrial scale.
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Affiliation(s)
- Susan Michelz Beitel
- Department of Biochemistry and Microbiology, Institute Bioscience, São Paulo State University (UNESP), Av. 24A 1515 CEP- 13506-900, Rio Claro São Paulo, Brazil
| | - Luciana Fontes Coelho
- Department of Biochemistry and Microbiology, Institute Bioscience, São Paulo State University (UNESP), Av. 24A 1515 CEP- 13506-900, Rio Claro São Paulo, Brazil
| | - Jonas Contiero
- Department of Biochemistry and Microbiology, Institute Bioscience, São Paulo State University (UNESP), Av. 24A 1515 CEP- 13506-900, Rio Claro São Paulo, Brazil
- Associate Laboratory IPBEN-UNESP, Av. 24A 1515 CEP- 13506-900, Rio Claro São Paulo, Brazil
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12
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Izaguirre JK, Dietrich T, Villarán MC, Castañón S. Protein hydrolysate from organic fraction of municipal solid waste compost as nitrogen source to produce lactic acid by Lactobacillus fermentum ATCC 9338 and Lactobacillus plantarum NCIMB 8826. Process Biochem 2020. [DOI: 10.1016/j.procbio.2019.09.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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13
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D-Lactic acid fermentation performance and the enzyme activity of a novel bacterium Terrilactibacillus laevilacticus SK5–6. ANN MICROBIOL 2019. [DOI: 10.1007/s13213-019-01538-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Abstract
Purpose
The aim of this study was to prove that Terrilactibacillus laevilacticus SK5-6, a novel D-lactate producer, exhibited a good fermentation performance comparing to the reference D-lactate producer Sporolactobacillus sp.
Methods
Glucose bioconversion for D-lactate production and the activity of five key enzymes including phosphofructokinase (PFK), pyruvate kinase (PYK), D-lactate dehydrogenase (D-LDH), L-lactate dehydrogenase (L-LDH), and lactate isomerase (LI) were investigated in the cultivation of T. laevilacticus SK5–6 and S. laevolacticus 0361T.
Results
T. laevilacticus SK5–6 produced D-lactate at higher yield, productivity, and optical purity compared with S. laevolacticus 0361T. T. laevilacticus SK5–6, the catalase-positive isolate, simultaneously grew and produced D-lactate without lag phase while delayed growth and D-lactate production were observed in the culture of S. laevolacticus 0361T. The higher production of D-lactate in T. laevilacticus SK5–6 was due to the higher growth rate and the higher specific activities of the key enzymes observed at the early stage of the fermentation. The low isomerization activity was responsible for the high optical purity of D-lactate in the cultivation of T. laevilacticus SK5–6.
Conclusion
The lowest specific activity of PFK following by PYK and D/L-LDHs, respectively, indicated that the conversion of fructose-6-phosphate was the rate limiting step. Under the well-optimized conditions, the activation of D/L-LDHs by fructose-1,6-phosphate and ATP regeneration by PYK drove glucose bioconversion toward D-lactate. The optical purity of D-lactate was controlled by D/L-LDHs and the activation of isomerases. High D-LDH with limited isomerase activity was preferable during the fermentation as it assured the high optical purity.
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14
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Zhao C, Zhang Y, Li Y. Production of fuels and chemicals from renewable resources using engineered Escherichia coli. Biotechnol Adv 2019; 37:107402. [DOI: 10.1016/j.biotechadv.2019.06.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Revised: 05/23/2019] [Accepted: 06/02/2019] [Indexed: 02/06/2023]
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15
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Han X, Huang K, Tang H, Ni J, Liu J, Xu P, Tao F. Steps Toward High-Performance PLA: Economical Production of d-Lactate Enabled by a Newly Isolated Sporolactobacillus terrae Strain. Biotechnol J 2019; 14:e1800656. [PMID: 30810274 DOI: 10.1002/biot.201800656] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 12/21/2018] [Indexed: 11/10/2022]
Abstract
Optically pure d-lactate production has received much attention for its critical role in high-performance polylactic acid production. However, the current technology can hardly meet the comprehensive demand of industrialization on final titer, productivity, optical purity, and raw material costs. Here, an efficient d-lactate producer strain, Sporolactobacillus terrae (S. terrae) HKM-1, is isolated for d-lactate production. The strain HKM-1 shows extremely high d-lactate fermentative capability by using peanut meal, soybean meal, or corn steep liquor powder as a sole nitrogen source; the final titers (205.7 g L-1 , 218.9 g L-1 , and 193.9 g L-1 , respectively) and productivities (5.56 g L-1 h-1 , 5.34 g L-1 h-1 , and 3.73 g L-1 h-1 , respectively) of d-lactate reached the highest level ever reported. A comparative genomic analysis between S. terrae HKM-1 and previously reported d-lactate high-producing Sporolactobacillus inulinus (S. inulinus) CASD is conducted. The results show that many unrelated genetic features may contribute to the superior performance in d-lactate production of S. terrae HKM-1. This d-lactate producer HKM-1, along with its fermentation process, is promising for sustainable d-lactate production by using agro-industrial wastes.
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Affiliation(s)
- Xiao Han
- State Key Laboratory of Microbial Metabolism Joint International Research Laboratory of Metabolic and Developmental Sciences and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai,, P. R. China
| | - Kaiming Huang
- State Key Laboratory of Microbial Metabolism Joint International Research Laboratory of Metabolic and Developmental Sciences and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai,, P. R. China
| | - Hongzhi Tang
- State Key Laboratory of Microbial Metabolism Joint International Research Laboratory of Metabolic and Developmental Sciences and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai,, P. R. China
| | - Jun Ni
- State Key Laboratory of Microbial Metabolism Joint International Research Laboratory of Metabolic and Developmental Sciences and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai,, P. R. China
| | - Jiongqin Liu
- State Key Laboratory of Microbial Metabolism Joint International Research Laboratory of Metabolic and Developmental Sciences and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai,, P. R. China
| | - Ping Xu
- State Key Laboratory of Microbial Metabolism Joint International Research Laboratory of Metabolic and Developmental Sciences and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai,, P. R. China
| | - Fei Tao
- State Key Laboratory of Microbial Metabolism Joint International Research Laboratory of Metabolic and Developmental Sciences and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai,, P. R. China
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16
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On the use of resting L. delbrueckii spp. delbrueckii cells for D-lactic acid production from orange peel wastes hydrolysates. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2019.02.012] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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17
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Tsuge Y, Kato N, Yamamoto S, Suda M, Jojima T, Inui M. Metabolic engineering of Corynebacterium glutamicum for hyperproduction of polymer-grade L- and D-lactic acid. Appl Microbiol Biotechnol 2019; 103:3381-3391. [PMID: 30877357 DOI: 10.1007/s00253-019-09737-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Revised: 02/18/2019] [Accepted: 03/03/2019] [Indexed: 01/22/2023]
Abstract
Strain development is critical for microbial production of bio-based chemicals. The stereo-complex form of polylactic acid, a complex of poly-L- and poly-D-lactic acid, is a promising polymer candidate due to its high thermotolerance. Here, we developed Corynebacterium glutamicum strains producing high amounts of L- and D-lactic acid through intensive metabolic engineering. Chromosomal overexpression of genes encoding the glycolytic enzymes, glucokinase, glyceraldehyde-3-phosphate dehydrogenase, phosphofructokinase, triosephosphate isomerase, and enolase, increased L- and D-lactic acid concentration by 146% and 56%, respectively. Chromosomal integration of two genes involved in the Entner-Doudoroff pathway (6-phosphogluconate dehydratase and 2-dehydro-3-deoxyphosphogluconate aldolase), together with a gene encoding glucose-6-phosphate dehydrogenase from Zymomonas mobilis, to bypass the carbon flow from glucose, further increased L- and D-lactic acid concentration by 11% and 44%, respectively. Finally, additional chromosomal overexpression of a gene encoding NADH dehydrogenase to modulate the redox balance resulted in the production of 212 g/L L-lactic acid with a 97.9% yield and 264 g/L D-lactic acid with a 95.0% yield. The optical purity of both L- and D-lactic acid was 99.9%. Because the constructed metabolically engineered strains were devoid of plasmids and antibiotic resistance genes and were cultivated in mineral salts medium, these strains could contribute to the cost-effective production of the stereo-complex form of polylactic acid in practical scale.
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Affiliation(s)
- Yota Tsuge
- Research Institute of Innovative Technology for the Earth, 9-2, Kizugawadai, Kizugawa, Kyoto, 619-0292, Japan.,Institute for Frontier Science Initiative, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa, 920-1192, Japan
| | - Naoto Kato
- Research Institute of Innovative Technology for the Earth, 9-2, Kizugawadai, Kizugawa, Kyoto, 619-0292, Japan
| | - Shogo Yamamoto
- Research Institute of Innovative Technology for the Earth, 9-2, Kizugawadai, Kizugawa, Kyoto, 619-0292, Japan
| | - Masako Suda
- Research Institute of Innovative Technology for the Earth, 9-2, Kizugawadai, Kizugawa, Kyoto, 619-0292, Japan
| | - Toru Jojima
- Research Institute of Innovative Technology for the Earth, 9-2, Kizugawadai, Kizugawa, Kyoto, 619-0292, Japan
| | - Masayuki Inui
- Research Institute of Innovative Technology for the Earth, 9-2, Kizugawadai, Kizugawa, Kyoto, 619-0292, Japan. .,Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5, Takayama, Ikoma, Nara, 630-0101, Japan.
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18
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Impact of Hydrolysis Methods on the Utilization of Agricultural Residues as Nutrient Source for D-lactic Acid Production by Sporolactobacillus inulinus. FERMENTATION-BASEL 2019. [DOI: 10.3390/fermentation5010012] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
d-lactic acid is a building block for heat resistant polylactic acid, a biobased polymer with a high potential. Nevertheless, an economically efficient industrial process for d-lactic acid production still needs to be implemented. Yeast extract is an expensive nutrient source, which is used to fulfill the complex nutritional requirements in lactic acid fermentations. The substitution of yeast extract by cheap alternative nutrient sources is a challenge in many fermentation processes. In this study, chemical and enzymatic hydrolysis techniques for protein rich agricultural residues and their effectiveness are compared, as well as their impact on the d-lactic acid production of Sporolactobacillus inulinus. An efficient substitution of yeast extract could be achieved by a variety of agricultural residues, hydrolysed with 3M H2SO4, demonstrating the much higher versatility and effectiveness of this method compared to enzymatic methods. In a fed-batch experiment with chemically hydrolyzed rapeseed meal and minimal supplementation, a lactic acid titer of 221 g L−1 and an overall productivity of 1.55 g (L h)−1 (96% yield) were obtained.
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19
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Wu B, Yu Q, Zheng S, Pedroso MM, Guddat LW, He B, Schenk G. Relative catalytic efficiencies and transcript levels of three d- and two l-lactate dehydrogenases for optically pure d-lactate production in Sporolactobacillus inulinus. Microbiologyopen 2018; 8:e00704. [PMID: 30066438 PMCID: PMC6528580 DOI: 10.1002/mbo3.704] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 07/02/2018] [Accepted: 07/03/2018] [Indexed: 11/23/2022] Open
Abstract
As the optical purity of the lactate monomer is pivotal for polymerization, the production of optically pure d‐lactate is of significant importance. Sporolactobacillus inulinus YBS1‐5 is a superior optically pure d‐lactate‐producing bacterium. However, little is known about the relationship between lactate dehydrogenases in S. inulinus YBS1‐5 and the optical purity of d‐lactate. Three potential d‐lactate dehydrogenase (D‐LDH1‐3)‐ and two putative l‐lactate dehydrogenase (L‐LDH1‐2)‐encoding genes were cloned from the YBS1‐5 strain and expressed in Escherichia coli D‐LDH1 exhibited the highest catalytic efficiency toward pyruvate, whereas two L‐LDHs showed low catalytic efficiency. Different neutralizers significantly affected the optical purity of d‐lactate produced by strain YBS1‐5 as well as the transcription levels of ldhDs and ldhLs. The high catalytic efficiency of D‐LDH1 and elevated ldhD1 mRNA levels suggest that this enzyme is essential for d‐lactate synthesis in S. inulinus YBS1‐5. The correlation between the optical purity of d‐lactate and transcription levels of ldhL1 in the case of different neutralizers indicate that ldhL1 is a key factor affecting the optical purity of d‐lactate in S. inulinus YBS1‐5.
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Affiliation(s)
- Bin Wu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, China
| | - Qi Yu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, China
| | - Shan Zheng
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia
| | - Marcelo Monteiro Pedroso
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia
| | - Luke W Guddat
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia
| | - Bingfang He
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing, China
| | - Gerhard Schenk
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia
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20
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Liu P, Zheng Z, Xu Q, Qian Z, Liu J, Ouyang J. Valorization of dairy waste for enhanced D-lactic acid production at low cost. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.05.014] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Nakano K, Sawada S, Yamada R, Mimitsuka T, Ogino H. Enhancement of the catalytic activity of d-lactate dehydrogenase from Sporolactobacillus laevolacticus by site-directed mutagenesis. Biochem Eng J 2018. [DOI: 10.1016/j.bej.2018.02.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Grewal J, Khare SK. One-pot bioprocess for lactic acid production from lignocellulosic agro-wastes by using ionic liquid stable Lactobacillus brevis. BIORESOURCE TECHNOLOGY 2018; 251:268-273. [PMID: 29288954 DOI: 10.1016/j.biortech.2017.12.056] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 12/17/2017] [Accepted: 12/18/2017] [Indexed: 06/07/2023]
Abstract
The lignocellulosic agro-wastes are an attractive renewable resource in biorefinery for production of value-added platform chemicals and biofuels. The study describes use of different agro-wastes as substrate for production of lactic acid, a C3-platform chemical and high demand industrial product by Lactobacillus brevis in a one-pot bioprocess. The simultaneous saccharification and co-fermentation (SSCF) process was achieved by L. brevis governed fermentation of sugars, derived from saccharification of ionic liquid pretreated feedstocks by nanoimmobilized cellulase, which was further recovered and used for consecutive cycle. The lactic acid yields of 0.22, 0.49, 0.52 g/g were obtained from cottonseed cake, wheat straw and sugarcane bagasse, respectively. The ionic liquid-tolerant L. brevis, cellulolytic reusable nanoimmobilized enzyme coupled with valorization of renewable feedstocks points towards a holistic approach for future biorefineries with sustainable production of bioproducts.
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Affiliation(s)
- Jasneet Grewal
- Enzyme and Microbial Biochemistry Laboratory, Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - S K Khare
- Enzyme and Microbial Biochemistry Laboratory, Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
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23
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Prasirtsak B, Thitiprasert S, Tolieng V, Assabumrungrat S, Tanasupawat S, Thongchul N. Characterization of D-lactic acid, spore-forming bacteria and Terrilactibacillus laevilacticus SK5-6 as potential industrial strains. ANN MICROBIOL 2017. [DOI: 10.1007/s13213-017-1306-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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24
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Lv G, Che C, Li L, Xu S, Guan W, Zhao B, Ju J. Betaine Improves Polymer-Grade D-Lactic Acid Production by Sporolactobacillus inulinus Using Ammonia as Green Neutralizer. Pol J Microbiol 2017; 66:273-276. [PMID: 28735321 DOI: 10.5604/01.3001.0010.7880] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The traditional CaCO3-based fermentation process generates huge amount of insoluble CaSO4 waste. To solve this problem, we have developed an efficient and green D-lactic acid fermentation process by using ammonia as neutralizer. The 106.7 g/L of D-lactic acid production and 0.89 g per g of consumed sugar were obtained by Sporolactobacillus inulinus CASD with a high optical purity of 99.7% by adding 100 mg/L betaine in the simple batch fermentation process. The addition of betaine was experimentally proven to protect cell at high concentration of ammonium ion, increase the D-lactate dehydrogenase specific activity and thus promote the production of D-lactic acid.
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Affiliation(s)
- Guoping Lv
- College of Life Science, Hebei Normal University, Shijiazhuang, China Shijiazhuang Center for Disease Control and Prevention, Shijiazhuang, China
| | - Chengchuan Che
- College of Life Science, Qufu Normal University, Qufu, China
| | - Li Li
- College of Life Science, Hebei Normal University, Shijiazhuang, China
| | - Shujing Xu
- College of Life Science, Hebei Normal University, Shijiazhuang, China
| | - Wanyi Guan
- College of Life Science, Hebei Normal University, Shijiazhuang, China
| | - Baohua Zhao
- College of Life Science, Hebei Normal University, Shijiazhuang, China
| | - Jiansong Ju
- College of Life Science, Hebei Normal University, Shijiazhuang, China
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25
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Li J, Sun J, Wu B, He B. Combined utilization of nutrients and sugar derived from wheat bran for d-Lactate fermentation by Sporolactobacillus inulinus YBS1-5. BIORESOURCE TECHNOLOGY 2017; 229:33-38. [PMID: 28092734 DOI: 10.1016/j.biortech.2016.12.101] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 12/24/2016] [Accepted: 12/27/2016] [Indexed: 06/06/2023]
Abstract
To decrease d-Lactate production cost, wheat bran, a low-cost waste of milling industry, was selected as the sole feedstock. First, the nutrients were recovered from wheat bran by acid protease hydrolysis. Then, cellulosic hydrolysates were prepared from protease-treated samples after acid pretreatment and enzymatic saccharification. The combined use of nutrients and hydrolysates as nitrogen and carbon sources for fermentation by S. inulinus YB1-5 resulted in d-Lactate levels of 99.5g/L, with an average production efficiency of 1.94g/L/h and a yield of 0.89g/g glucose. Moreover, fed-batch simultaneous saccharification and fermentation process at 40°C, 20% (w/v) solid loading and 20FPU/g solid cellulase concentration was obtained. d-Lactate concentrations, yield, productivity, and optical purity were 87.3g/L, 0.65g/g glucose, 0.81g/L/h and 99.1%, respectively. This study provided a feasible procedure that can help produce cellulosic d-Lactate using agricultural waste without external nutrient supplementation.
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Affiliation(s)
- Jiahuang Li
- School of Life Sciences, Nanjing University, 163 Xianlin Road, Nanjing 210023, Jiangsu, China
| | - Junfei Sun
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China
| | - Bin Wu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China; Jiangsu National Synergetic Innovation Center for Advanced Materials, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China.
| | - Bingfang He
- Jiangsu National Synergetic Innovation Center for Advanced Materials, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China; School of Pharmaceutical Sciences, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China
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26
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Osada I, Hosseini SM, Jeong S, Passerini S. Novel Ternary Polymer Electrolytes Based on Poly(lactic acid) from Sustainable Sources. ChemElectroChem 2017. [DOI: 10.1002/celc.201600653] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Irene Osada
- Helmholtz-Institute Ulm; Karlsruhe Institute of Technology; Helmholtz-Str.11 89081 Ulm Germany
| | - S. Milad Hosseini
- Helmholtz-Institute Ulm; Karlsruhe Institute of Technology; Helmholtz-Str.11 89081 Ulm Germany
| | - Sangsik Jeong
- Helmholtz-Institute Ulm; Karlsruhe Institute of Technology; Helmholtz-Str.11 89081 Ulm Germany
| | - Stefano Passerini
- Helmholtz-Institute Ulm; Karlsruhe Institute of Technology; Helmholtz-Str.11 89081 Ulm Germany
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27
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Contributory roles of two l-lactate dehydrogenases for l-lactic acid production in thermotolerant Bacillus coagulans. Sci Rep 2016; 6:37916. [PMID: 27885267 PMCID: PMC5122838 DOI: 10.1038/srep37916] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 11/04/2016] [Indexed: 02/06/2023] Open
Abstract
Thermotolerant Bacillus coagulans is considered to be a more promising producer for bio-chemicals, due to its capacity to withstand harsh conditions. Two L-lactate dehydrogenase (LDH) encoding genes (ldhL1 and ldhL2) and one D-LDH encoding gene (ldhD) were annotated from the B. coagulans DSM1 genome. Transcriptional analysis revealed that the expression of ldhL2 was undetectable while the ldhL1 transcription level was much higher than that of ldhD at all growth phases. Deletion of the ldhL2 gene revealed no difference in fermentation profile compared to the wild-type strain, while ldhL1 single deletion or ldhL1ldhL2 double deletion completely blocked L-lactic acid production. Complementation of ldhL1 in the above knockout strains restored fermentation profiles to those observed in the wild-type strain. This study demonstrates ldhL1 is crucial for L-lactic acid production and NADH balance in B. coagulans DSM1 and lays the fundamental for engineering the thermotolerant B. coagulans strain as a platform chemicals producer.
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28
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Biotechnological production of enantiomerically pure d-lactic acid. Appl Microbiol Biotechnol 2016; 100:9423-9437. [DOI: 10.1007/s00253-016-7843-7] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 09/04/2016] [Accepted: 09/07/2016] [Indexed: 12/13/2022]
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29
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Dietz D, Schneider R, Papendiek F, Venus J. Leguminose green juice as an efficient nutrient for l(+)-lactic acid production. J Biotechnol 2016; 236:26-34. [PMID: 27422353 DOI: 10.1016/j.jbiotec.2016.07.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 07/06/2016] [Accepted: 07/11/2016] [Indexed: 10/21/2022]
Abstract
Lactic acid is one of the most important building blocks for the production of bioplastic. Many investigations have been conducted to reduce the lactic acid production costs. In this work, the focus was put on the application of legume pressed juice or green juice as nutrient source. The pressed juice was utilized directly without prior pre-treatment and sterilization. Using two different alfalfa green juices and a clover green juice from two different harvest years as sole nutrients, non-sterile fermentations were performed at 52°C and pH 6.0 with a thermotolerant strain Bacillus coagulans AT107. The results showed that alfalfa green juices generally were more suitable for high lactic acid production than clover green juices, presumably due to the higher nitrogen content. A final titer of 98.8g/L after 30h with l(+)-lactic acid purity of >99% was obtained.
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Affiliation(s)
- Donna Dietz
- Leibniz Institute for Agricultural Engineering Potsdam-Bornim, Germany.
| | - Roland Schneider
- Leibniz Institute for Agricultural Engineering Potsdam-Bornim, Germany
| | | | - Joachim Venus
- Leibniz Institute for Agricultural Engineering Potsdam-Bornim, Germany
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30
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Li C, Tao F, Xu P. Carbon Flux Trapping: Highly Efficient Production of Polymer-Grade d-Lactic Acid with a Thermophilic d-Lactate Dehydrogenase. Chembiochem 2016; 17:1491-4. [PMID: 27237045 DOI: 10.1002/cbic.201600288] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Indexed: 11/10/2022]
Abstract
High production of polymer-grade d-lactic acid is urgently required, particularly for the synthesis of polylactic acid. High-temperature fermentation has multiple advantages, such as lower equipment requirement and energy consumption, which are essential for lowering operating costs. We identified and introduced a unique d-lactate dehydrogenase into a thermotolerant butane-2,3-diol-producing strain. Carbon flux "trapping" was achieved by a "trapping point" created by combination of the introduced enzyme and the host efflux pump, which afforded irreversible transport of d-lactic acid. The overall carbon flux of the engineered strain was significantly enhanced and was redistributed predominantly to d-lactic acid. Under optimized conditions at 50 °C, d-lactic acid reached the highest titer (226.6 g L(-1) ) reported to date. This discovery allows us to extend the carbon flux trapping strategy to engineering complex metabolic networks.
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Affiliation(s)
- Chao Li
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.,Joint International Research Laboratory of Metabolic, and Developmental Sciences, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Fei Tao
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.,Joint International Research Laboratory of Metabolic, and Developmental Sciences, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Ping Xu
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China. .,Joint International Research Laboratory of Metabolic, and Developmental Sciences, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China. .,Shanghai Collaborative Innovation Center for Biomanufacturing, East China University of Science and Technology, 800 Dongchuan Road, Shanghai, 200237, China.
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31
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Abat C, Kerbaj J, Dubourg G, Garcia V, Rolain JM. Human Infection with Sporolactobacillus laevolacticus, Marseille, France. Emerg Infect Dis 2016; 21:2106-8. [PMID: 26488681 PMCID: PMC4622267 DOI: 10.3201/eid2111.151197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Bai Z, Gao Z, Sun J, Wu B, He B. D-Lactic acid production by Sporolactobacillus inulinus YBS1-5 with simultaneous utilization of cottonseed meal and corncob residue. BIORESOURCE TECHNOLOGY 2016; 207:346-352. [PMID: 26897413 DOI: 10.1016/j.biortech.2016.02.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Revised: 01/31/2016] [Accepted: 02/01/2016] [Indexed: 06/05/2023]
Abstract
d-Lactic acid, is an important organic acid produced from agro-industrial wastes by Sporolactobacillus inulinus YBS1-5 was investigated to reduce the raw material cost of fermentation. The YBS1-5 strain could produce d-lactic acid by using cottonseed meal as the sole nitrogen source. For efficient utilization, the cottonseed meal was enzymatically hydrolyzed and simultaneously utilized during d-lactic acid fermentation. Corncob residues are rich in cellulose and can be enzymatically hydrolyzed without pretreatment. The hydrolysate of this lignocellulosic waste could be utilized by strain YBS1-5 as a carbon source for d-lactic acid production. Under optimal conditions, a high d-lactic acid concentration (107.2g/L) was obtained in 7-L fed-batch fermenter, with an average productivity of 1.19g/L/h and a yield of 0.85g/g glucose. The optical purity of d-lactic acid in the broth was 99.2%. This study presented a new approach for low-cost production of d-lactic acid for an industrial application.
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Affiliation(s)
- Zhongzhong Bai
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China
| | - Zhen Gao
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China
| | - Junfei Sun
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China
| | - Bin Wu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China.
| | - Bingfang He
- School of Pharmaceutical Sciences, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China
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Reddy Tadi SR, E. V. R. A, Limaye AM, Sivaprakasam S. Enhanced production of optically pure d
(-) lactic acid from nutritionally rich Borassus flabellifer
sugar and whey protein hydrolysate based-fermentation medium. Biotechnol Appl Biochem 2016; 64:279-289. [DOI: 10.1002/bab.1470] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Accepted: 12/11/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Subbi Rami Reddy Tadi
- BioPAT Laboratory; Department of Biosciences and Bioengineering; Indian Institute of Technology Guwahati; Guwahati India
| | - Arun E. V. R.
- BioPAT Laboratory; Department of Biosciences and Bioengineering; Indian Institute of Technology Guwahati; Guwahati India
| | - Anil Mukund Limaye
- BioPAT Laboratory; Department of Biosciences and Bioengineering; Indian Institute of Technology Guwahati; Guwahati India
| | - Senthilkumar Sivaprakasam
- BioPAT Laboratory; Department of Biosciences and Bioengineering; Indian Institute of Technology Guwahati; Guwahati India
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Diammonium phosphate stimulates transcription of L-lactate dehydrogenase leading to increased L-lactate production in the thermotolerant Bacillus coagulans strain. Appl Microbiol Biotechnol 2016; 100:6653-6660. [DOI: 10.1007/s00253-016-7379-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 01/27/2016] [Accepted: 02/03/2016] [Indexed: 10/22/2022]
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Djukić-Vuković A, Mladenović D, Radosavljević M, Kocić-Tanackov S, Pejin J, Mojović L. Wastes from bioethanol and beer productions as substrates for l(+) lactic acid production - A comparative study. WASTE MANAGEMENT (NEW YORK, N.Y.) 2016; 48:478-482. [PMID: 26639411 DOI: 10.1016/j.wasman.2015.11.031] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Revised: 09/29/2015] [Accepted: 11/19/2015] [Indexed: 06/05/2023]
Abstract
Waste substrates from bioethanol and beer productions are cheap, abundant and renewable substrates for biorefinery production of lactic acid (LA) and variability in their chemical composition presents a challenge in their valorisation. Three types of waste substrates, wasted bread and wasted potato stillage from bioethanol production and brewers' spent grain hydrolysate from beer production were studied as substrates for the production of l(+) LA and probiotic biomass by Lactobacillus rhamnosus ATCC 7469. The correlation of the content of free alpha amino nitrogen and the production of LA was determined as a critical characteristic of the waste media for efficient LA production by L. rhamnosus on the substrates which contained equal amount of fermentable sugars. A maximal LA productivity of 1.54gL(-1)h(-1) was obtained on wasted bread stillage media, whilst maximal productivities achieved on the potato stillage and brewers' spent grain hydrolysate media were 1.28gL(-1)h(-1)and 0.48gL(-1)h(-1), respectively. A highest LA yield of 0.91gg(-1) was achieved on wasted bread stillage media, followed by the yield of 0.81gg(-1) on wasted potato stillage and 0.34gg(-1) on brewers' spent grain hydrolysate media. The kinetics of sugar consumption in the two stillage substrates were similar while the sugar conversion in brewers' spent grain hydrolysate was slower and less efficient due to significantly lower content of free alpha amino nitrogen. The lignocellulosic hydrolysate from beer production required additional supplementation with nitrogen.
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Affiliation(s)
- Aleksandra Djukić-Vuković
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia.
| | - Dragana Mladenović
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia
| | - Miloš Radosavljević
- Faculty of Technology, University of Novi Sad, Bulevar cara Lazara 1, 21000 Novi Sad, Serbia
| | - Sunčica Kocić-Tanackov
- Faculty of Technology, University of Novi Sad, Bulevar cara Lazara 1, 21000 Novi Sad, Serbia
| | - Jelena Pejin
- Faculty of Technology, University of Novi Sad, Bulevar cara Lazara 1, 21000 Novi Sad, Serbia
| | - Ljiljana Mojović
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia
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Efficient fermentative production of polymer-grade D-lactate by an engineered alkaliphilic Bacillus sp. strain under non-sterile conditions. Microb Cell Fact 2016; 15:3. [PMID: 26754255 PMCID: PMC4709905 DOI: 10.1186/s12934-015-0408-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 12/30/2015] [Indexed: 11/17/2022] Open
Abstract
Background Polylactic acid (PLA) is one important chemical building block that is well known as a biodegradable and a biocompatible plastic. The traditional lactate fermentation processes need CaCO3 as neutralizer to maintain the desired pH, which results in an amount of insoluble CaSO4 waste during the purification process. To overcome such environmental issue, alkaliphilic organisms have the great potential to be used as an organic acid producer under NaOH-neutralizing agent based fermentation. Additionally, high optical purity property in d-lactic acid is now attracting more attention from both scientific and industrial communities because it can improve mechanical properties of PLA by blending l- or d-polymer together. However, the use of low-price nitrogen source for d-lactate fermentation by alkaliphilic organisms combined with NaOH-neutralizing agent based process has not been studied. Therefore, our goal was the demonstrations of newly simplify high-optical-purity d-lactate production by using low-priced peanut meal combined with non-sterile NaOH-neutralizing agent based fermentation. Results In this study, we developed a process for high-optical-purity d-lactate production using an engineered alkaliphilic Bacillus strain. First, the native l-lactate dehydrogenase gene (ldh) was knocked out, and the d-lactate dehydrogenase gene from Lactobacillus delbrueckii was introduced to construct a d-lactate producer. The key gene responsible for exopolysaccharide biosynthesis (epsD) was subsequently disrupted to increase the yield and simplify the downstream process. Finally, a fed-batch fermentation under non-sterile conditions was conducted using low-priced peanut meal as a nitrogen source and NaOH as a green neutralizer. The d-lactate titer reached 143.99 g/l, with a yield of 96.09 %, an overall productivity of 1.674 g/l/h including with the highest productivity at 16 h of 3.04 g/l/h, which was even higher than that of a sterile fermentation. Moreover, high optical purities (approximately 99.85 %) of d-lactate were obtained under both conditions. Conclusions Given the use of a cheap nitrogen source and a non-sterile green fermentation process, this study provides a more valuable and favorable fermentation process for future polymer-grade d-lactate production.
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Wang Y, Wang M, Cai D, Wang B, Wang Z, Qin P, Tan T. Efficient l-lactic acid production from sweet sorghum bagasse by open simultaneous saccharification and fermentation. RSC Adv 2016. [DOI: 10.1039/c6ra04538c] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An open SSF process using B. coagulans LA1507 introduces an effective way to produce l-lactic acid from abundant SSB.
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Affiliation(s)
- Y. Wang
- National Energy R&D Center for Biorefinery
- Beijing University of Chemical Technology
- Beijing 100029
- PR China
| | - M. Wang
- National Energy R&D Center for Biorefinery
- Beijing University of Chemical Technology
- Beijing 100029
- PR China
| | - D. Cai
- National Energy R&D Center for Biorefinery
- Beijing University of Chemical Technology
- Beijing 100029
- PR China
| | - B. Wang
- National Energy R&D Center for Biorefinery
- Beijing University of Chemical Technology
- Beijing 100029
- PR China
| | - Z. Wang
- National Energy R&D Center for Biorefinery
- Beijing University of Chemical Technology
- Beijing 100029
- PR China
| | - P. Qin
- National Energy R&D Center for Biorefinery
- Beijing University of Chemical Technology
- Beijing 100029
- PR China
| | - T. Tan
- National Energy R&D Center for Biorefinery
- Beijing University of Chemical Technology
- Beijing 100029
- PR China
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38
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Fermentative production of enantiomerically pure S-1,2-propanediol from glucose by engineered E. coli strain. Appl Microbiol Biotechnol 2015; 100:1241-1251. [DOI: 10.1007/s00253-015-7034-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 09/10/2015] [Accepted: 09/22/2015] [Indexed: 10/22/2022]
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39
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Zhu L, Xu X, Wang L, Dong H, Yu B. The D-Lactate Dehydrogenase from Sporolactobacillus inulinus Also Possessing Reversible Deamination Activity. PLoS One 2015; 10:e0139066. [PMID: 26398356 PMCID: PMC4580590 DOI: 10.1371/journal.pone.0139066] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 09/07/2015] [Indexed: 11/18/2022] Open
Abstract
Hydroxyacid dehydrogenases are responsible for the conversion of 2-keto acids to 2-hydroxyacids and have a wide range of biotechnological applications. In this study, a D-lactate dehydrogenase (D-LDH) from a Sporolactobacillus inulinus strain was experimentally verified to have both the D-LDH and glutamate dehydrogenase (GDH) activities (reversible deamination). The catalytic mechanism was demonstrated by identification of key residues from the crystal structure analysis and site-directed mutagenesis. The Arg234 and Gly79 residues of this enzyme play a significant role in both D-LDH and GDH activities. His295 and Phe298 in DLDH744 were identified to be key residues for lactate dehydrogenase (LDH) activity only whereas Tyr101 is a unique residue that is critical for GDH activity. Characterization of the biochemical properties contributes to understanding of the catalytic mechanism of this novel D-lactate dehydrogenase enzyme.
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Affiliation(s)
- Lingfeng Zhu
- CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, PR China
- University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Xiaoling Xu
- Institute of Ageing Research, School of Medicine, Hangzhou Normal University, Hangzhou, 311121, PR China
| | - Limin Wang
- CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, PR China
| | - Hui Dong
- Key Laboratory of Tianjin Radiation and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, PR China
- * E-mail: (BY) (HD)
| | - Bo Yu
- CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, PR China
- * E-mail: (BY) (HD)
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40
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NADP+-Preferring D-Lactate Dehydrogenase from Sporolactobacillus inulinus. Appl Environ Microbiol 2015; 81:6294-301. [PMID: 26150461 DOI: 10.1128/aem.01871-15] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Accepted: 06/28/2015] [Indexed: 11/20/2022] Open
Abstract
Hydroxy acid dehydrogenases, including l- and d-lactate dehydrogenases (L-LDH and D-LDH), are responsible for the stereospecific conversion of 2-keto acids to 2-hydroxyacids and extensively used in a wide range of biotechnological applications. A common feature of LDHs is their high specificity for NAD(+) as a cofactor. An LDH that could effectively use NADPH as a coenzyme could be an alternative enzymatic system for regeneration of the oxidized, phosphorylated cofactor. In this study, a d-lactate dehydrogenase from a Sporolactobacillus inulinus strain was found to use both NADH and NADPH with high efficiencies and with a preference for NADPH as its coenzyme, which is different from the coenzyme utilization of all previously reported LDHs. The biochemical properties of the D-LDH enzyme were determined by X-ray crystal structural characterization and in vivo and in vitro enzymatic activity analyses. The residue Asn(174) was demonstrated to be critical for NADPH utilization. Characterization of the biochemical properties of this enzyme will contribute to understanding of the catalytic mechanism and provide referential information for shifting the coenzyme utilization specificity of 2-hydroxyacid dehydrogenases.
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41
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Enhancing the light-driven production of D-lactate by engineering cyanobacterium using a combinational strategy. Sci Rep 2015; 5:9777. [PMID: 25940225 PMCID: PMC4419521 DOI: 10.1038/srep09777] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Accepted: 03/19/2015] [Indexed: 11/28/2022] Open
Abstract
It is increasingly attractive to engineer cyanobacteria for bulk production of chemicals from CO2. However, cofactor bias of cyanobacteria is different from bacteria that prefer NADH, which hampers cyanobacterial strain engineering. In this study, the key enzyme d-lactate dehydrogenase (LdhD) from Lactobacillus bulgaricus ATCC11842 was engineered to reverse its favored cofactor from NADH to NADPH. Then, the engineered enzyme was introduced into Synechococcus elongatus PCC7942 to construct an efficient light-driven system that produces d-lactic acid from CO2. Mutation of LdhD drove a fundamental shift in cofactor preference towards NADPH, and increased d-lactate productivity by over 3.6-fold. We further demonstrated that introduction of a lactic acid transporter and bubbling CO2-enriched air also enhanced d-lactate productivity. Using this combinational strategy, increased d-lactate concentration and productivity were achieved. The present strategy may also be used to engineer cyanobacteria for producing other useful chemicals.
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42
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Dreschke G, Probst M, Walter A, Pümpel T, Walde J, Insam H. Lactic acid and methane: improved exploitation of biowaste potential. BIORESOURCE TECHNOLOGY 2015; 176:47-55. [PMID: 25460983 DOI: 10.1016/j.biortech.2014.10.136] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Revised: 10/24/2014] [Accepted: 10/27/2014] [Indexed: 06/04/2023]
Abstract
This feasibility study investigated a two-step biorefining approach to increase the value gained by recycling of organic municipal solid waste. Firstly, lactic acid was produced via batch fermentation at 37°C using the indigenous microbiome. Experiments revealed an optimal fermentation period of 24h resulting in high yields of lactic acid (up to 37gkg(-1)). The lactic acid proportion of total volatile fatty acid content reached up to 83%. Lactobacilli were selectively enriched to up to 75% of the bacterial community. Additionally conversion of organic matter to lactic acid was increased from 22% to 30% through counteracting end product inhibition by continuous lactic acid extraction. Secondly, fermentation residues were used as co-substrate in biomethane production yielding up to 618±41Nmlbiomethaneg(-1) volatile solids. Digestate, the only end product of this process can be used as organic fertilizer.
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Affiliation(s)
- G Dreschke
- Institute of Microbiology, University of Innsbruck, Technikerstraße 25d, 6020 Innsbruck, Austria.
| | - M Probst
- Institute of Microbiology, University of Innsbruck, Technikerstraße 25d, 6020 Innsbruck, Austria.
| | - A Walter
- Institute of Microbiology, University of Innsbruck, Technikerstraße 25d, 6020 Innsbruck, Austria.
| | - T Pümpel
- Institute of Microbiology, University of Innsbruck, Technikerstraße 25d, 6020 Innsbruck, Austria.
| | - J Walde
- Department of Statistics, University of Innsbruck, Universitätsstraße 15, 6020 Innsbruck, Austria.
| | - H Insam
- Institute of Microbiology, University of Innsbruck, Technikerstraße 25d, 6020 Innsbruck, Austria.
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Microorganisms for the Production of Lactic Acid and Organic Lactates. MICROORGANISMS IN BIOREFINERIES 2015. [DOI: 10.1007/978-3-662-45209-7_9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Major Role of NAD-Dependent Lactate Dehydrogenases in the Production of l-Lactic Acid with High Optical Purity by the Thermophile Bacillus coagulans. Appl Environ Microbiol 2014; 80:7134-41. [PMID: 25217009 DOI: 10.1128/aem.01864-14] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Accepted: 09/04/2014] [Indexed: 11/20/2022] Open
Abstract
Bacillus coagulans 2-6 is an excellent producer of optically pure l-lactic acid. However, little is known about the mechanism of synthesis of the highly optically pure l-lactic acid produced by this strain. Three enzymes responsible for lactic acid production-NAD-dependent l-lactate dehydrogenase (l-nLDH; encoded by ldhL), NAD-dependent d-lactate dehydrogenase (d-nLDH; encoded by ldhD), and glycolate oxidase (GOX)-were systematically investigated in order to study the relationship between these enzymes and the optical purity of lactic acid. Lactobacillus delbrueckii subsp. bulgaricus DSM 20081 (a d-lactic acid producer) and Lactobacillus plantarum subsp. plantarum DSM 20174 (a dl-lactic acid producer) were also examined in this study as comparative strains, in addition to B. coagulans. The specific activities of key enzymes for lactic acid production in the three strains were characterized in vivo and in vitro, and the levels of transcription of the ldhL, ldhD, and GOX genes during fermentation were also analyzed. The catalytic activities of l-nLDH and d-nLDH were different in l-, d-, and dl-lactic acid producers. Only l-nLDH activity was detected in B. coagulans 2-6 under native conditions, and the level of transcription of ldhL in B. coagulans 2-6 was much higher than that of ldhD or the GOX gene at all growth phases. However, for the two Lactobacillus strains used in this study, ldhD transcription levels were higher than those of ldhL. The high catalytic efficiency of l-nLDH toward pyruvate and the high transcription ratios of ldhL to ldhD and ldhL to the GOX gene provide the key explanations for the high optical purity of l-lactic acid produced by B. coagulans 2-6.
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Higher thermostability of l-lactate dehydrogenases is a key factor in decreasing the optical purity of d-lactic acid produced from Lactobacillus coryniformis. Enzyme Microb Technol 2014; 58-59:29-35. [DOI: 10.1016/j.enzmictec.2014.02.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 02/04/2014] [Accepted: 02/17/2014] [Indexed: 11/17/2022]
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Genome Sequence of Sporolactobacillus laevolacticus DSM442, an Efficient Polymer-Grade D-Lactate Producer from Agricultural Waste Cottonseed as a Nitrogen Source. GENOME ANNOUNCEMENTS 2013; 1:1/6/e01100-13. [PMID: 24371202 PMCID: PMC3873612 DOI: 10.1128/genomea.01100-13] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Sporolactobacillus laevolacticus DSM442 is an efficient polymer-grade d-lactic acid producer from low-cost agricultural waste cottonseed powder as the sole nitrogen source. Here we present a 3.59-Mb assembly of its genome sequence, which might provide useful information to further improve the strain for higher production titers.
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47
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Peng L, Wang L, Che C, Yang G, Yu B, Ma Y. Bacillus sp. strain P38: an efficient producer of L-lactate from cellulosic hydrolysate, with high tolerance for 2-furfural. BIORESOURCE TECHNOLOGY 2013; 149:169-76. [PMID: 24096283 DOI: 10.1016/j.biortech.2013.09.047] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Revised: 09/09/2013] [Accepted: 09/11/2013] [Indexed: 05/13/2023]
Abstract
In this study, efficient polymer-grade L-lactic acid production was achieved with the strain Bacillus sp. P38 by using cellulosic hydrolysate as the sole carbon source. In fed-batch fermentation, 180 g L(-1)L-lactic acid was obtained with a volumetric productivity of 2.4 g L(-1)h(-1) and a yield of 0.96 g g(-1) total reducing sugars. No D-isomer of lactic acid was detected in the broth. Strain P38 tolerated up to 10 g L(-1) 2-furfural, and lactate production was sharply inhibited only when the 2-furfural concentration was higher than 6 g L(-1). Moreover, strain P38 also tolerated high concentrations (>6 g L(-1)) of other fermentation inhibitors in cellulosic hydrolysate, such as vanillin and acetic acid, although it was slightly sensitive to formic acid. The efficient L-lactic acid production, combined with high inhibitor tolerance and efficient pentose utilization, indicate that Bacillus sp. P38 is a promising producer of polymer-grade L-lactic acid from cellulosic biomass.
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Affiliation(s)
- Lili Peng
- CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; College of Life Science, Qufu Normal University, Qufu 273165, China
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