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Icer MA, Sarikaya B, Kocyigit E, Atabilen B, Çelik MN, Capasso R, Ağagündüz D, Budán F. Contributions of Gamma-Aminobutyric Acid (GABA) Produced by Lactic Acid Bacteria on Food Quality and Human Health: Current Applications and Future Prospects. Foods 2024; 13:2437. [PMID: 39123629 PMCID: PMC11311711 DOI: 10.3390/foods13152437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2024] [Revised: 07/20/2024] [Accepted: 07/29/2024] [Indexed: 08/12/2024] Open
Abstract
The need to increase food safety and improve human health has led to a worldwide increase in interest in gamma-aminobutyric acid (GABA), produced by lactic acid bacteria (LABs). GABA, produced from glutamic acid in a reaction catalyzed by glutamate decarboxylase (GAD), is a four-carbon, non-protein amino acid that is increasingly used in the food industry to improve the safety/quality of foods. In addition to the possible positive effects of GABA, called a postbiotic, on neuroprotection, improving sleep quality, alleviating depression and relieving pain, the various health benefits of GABA-enriched foods such as antidiabetic, antihypertension, and anti-inflammatory effects are also being investigated. For all these reasons, it is not surprising that efforts to identify LAB strains with a high GABA productivity and to increase GABA production from LABs through genetic engineering to increase GABA yield are accelerating. However, GABA's contributions to food safety/quality and human health have not yet been fully discussed in the literature. Therefore, this current review highlights the synthesis and food applications of GABA produced from LABs, discusses its health benefits such as, for example, alleviating drug withdrawal syndromes and regulating obesity and overeating. Still, other potential food and drug interactions (among others) remain unanswered questions to be elucidated in the future. Hence, this review paves the way toward further studies.
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Affiliation(s)
- Mehmet Arif Icer
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Amasya University, Amasya 05100, Turkey;
| | - Buse Sarikaya
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Amasya University, Amasya 05100, Turkey;
| | - Emine Kocyigit
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Ordu University, Ordu 52000, Turkey;
| | - Büşra Atabilen
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Karamanoğlu Mehmetbey University, Karaman 70100, Turkey;
| | - Menşure Nur Çelik
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Ondokuz Mayıs University, Samsun 55000, Turkey;
| | - Raffaele Capasso
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy;
| | - Duygu Ağagündüz
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Gazi University, Emek, Ankara 06490, Turkey;
| | - Ferenc Budán
- Institute of Physiology, Medical School, University of Pécs, H-7624 Pécs, Hungary
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Iorizzo M, Paventi G, Di Martino C. Biosynthesis of Gamma-Aminobutyric Acid (GABA) by Lactiplantibacillus plantarum in Fermented Food Production. Curr Issues Mol Biol 2023; 46:200-220. [PMID: 38248317 PMCID: PMC10814391 DOI: 10.3390/cimb46010015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 12/22/2023] [Accepted: 12/25/2023] [Indexed: 01/23/2024] Open
Abstract
In recent decades, given the important role of gamma-aminobutyric acid (GABA) in human health, scientists have paid great attention to the enrichment of this chemical compound in food using various methods, including microbial fermentation. Moreover, GABA or GABA-rich products have been successfully commercialized as food additives or functional dietary supplements. Several microorganisms can produce GABA, including bacteria, fungi, and yeasts. Among GABA-producing microorganisms, lactic acid bacteria (LAB) are commonly used in the production of many fermented foods. Lactiplantibacillus plantarum (formerly Lactobacillus plantarum) is a LAB species that has a long history of natural occurrence and safe use in a wide variety of fermented foods and beverages. Within this species, some strains possess not only good pro-technological properties but also the ability to produce various bioactive compounds, including GABA. The present review aims, after a preliminary excursus on the function and biosynthesis of GABA, to provide an overview of the current uses of microorganisms and, in particular, of L. plantarum in the production of GABA, with a detailed focus on fermented foods. The results of the studies reported in this review highlight that the selection of new probiotic strains of L. plantarum with the ability to synthesize GABA may offer concrete opportunities for the design of new functional foods.
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Affiliation(s)
| | - Gianluca Paventi
- Department of Agricultural, Environmental and Food Sciences, University of Molise, Via De Sanctis, 86100 Campobasso, Italy; (M.I.); (C.D.M.)
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Han J, Zhao X, Zhao X, Wang Q, Li P, Gu Q. Microbial-Derived γ-Aminobutyric Acid: Synthesis, Purification, Physiological Function, and Applications. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:14931-14946. [PMID: 37792666 DOI: 10.1021/acs.jafc.3c05269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/06/2023]
Abstract
γ-Aminobutyric acid (GABA) is an important nonprotein amino acid that extensively exists in nature. At present, GABA is mainly obtained through chemical synthesis, plant enrichment, and microbial production, among which microbial production has received widespread attention due to its safety and environmental benefits. After using microbial fermentation to obtain GABA, it is necessary to be isolated and purified to ensure its quality and suitability for various industries such as food, agriculture, livestock, pharmaceutics, and others. This article provides a comprehensive review of the different sources of GABA, including its presence in nature and the synthesis methods. The factors affecting the production of microbial-derived GABA and its isolation and purification methods are further elucidated. Moreover, the main physiological functions of GABA and its application in different fields are also reviewed. By advancing our understanding of GABA, we can unlock its full potential and further utilize it in various fields to improve human health and well-being.
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Affiliation(s)
- Jiarun Han
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, People's Republic of China
| | - Xilian Zhao
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, People's Republic of China
| | - Xin Zhao
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, People's Republic of China
| | - Qi Wang
- Department of Food Science, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Ping Li
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, People's Republic of China
| | - Qing Gu
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, People's Republic of China
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Yavarzadeh M, Anwar F, Saadi S, Saari N. Production of glycerolamines based conjugated γ-aminobutyric acids using microbial COX and LOX as successor enzymes to GAD. Enzyme Microb Technol 2023; 169:110282. [PMID: 37393814 DOI: 10.1016/j.enzmictec.2023.110282] [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: 04/27/2023] [Revised: 06/22/2023] [Accepted: 06/25/2023] [Indexed: 07/04/2023]
Abstract
Gamma-aminobutyric acid (γ-ABA) can be produced by various microorganisms including bacteria, fungi and yeasts using enzymatic bioconversion, microbial fermentation or chemical hydrolysis. Regenerating conjugated glycerol-amines is valid by the intervention of microbial cyclooxygenase [COX] and lipooxygenase [LOX] enzymes produced via lactobacillus bacteria (LAB) as successor enzymes to glutamate decarboxylases (GAD). Therefore, the aim of this review is to provide an overview on γ-ABA production, and microbiological achievements used in producing this signal molecule based on those fermenting enzymes. The formation of aminoglycerides based conjugated γ-ABA is considered the key substances in controlling the host defense against pathogens and is aimed in increasing the neurotransmission effects and in suppressing further cardiovascular diseases.
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Affiliation(s)
- Marjan Yavarzadeh
- Department of Food Science, Faculty of Food Science and Technology, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Farooq Anwar
- Department of Food Science, Faculty of Food Science and Technology, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia; Institute of Chemistry, University of Sargodha, Sargodha 40100, Pakistan.
| | - Sami Saadi
- Institute de la Nutrition, de l'Alimentation et des Technologies Agroalimetaires INATAA, Université des Frères Mentouri Constantine, 1, Route de Ain El Bey, Constantine 25000, Algeria; Laboratoire de Génie Agro-Alimentaire (GeniAAl), INATAA, Université Frères Mentouri Constantine, 1 UFC1, Route de Ain El Bey, Constantine 25000, Algeria
| | - Nazamid Saari
- Department of Food Science, Faculty of Food Science and Technology, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.
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Cai H, Li X, Li D, Liu W, Han Y, Xu X, Yang P, Meng K. Optimization of Gamma-Aminobutyric Acid Production by Lactiplantibacillus plantarum FRT7 from Chinese Paocai. Foods 2023; 12:3034. [PMID: 37628033 PMCID: PMC10453537 DOI: 10.3390/foods12163034] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 07/28/2023] [Accepted: 08/10/2023] [Indexed: 08/27/2023] Open
Abstract
Gamma-aminobutyric acid (GABA) is a widely available non-protein amino acid whose physiological importance goes beyond its role as an inhibitory neurotransmitter in mammals. The GABA synthesis ability of ten strains of Lactiplantibacillus plantarum was screened. They produced GABA ranging from 48.19 ± 3.44 to 100.75 ± 1.63 mg/L at 24 h-cultivation. Among them, Lp. plantarum FRT7 showed the highest GABA production. Therefore, FRT7 was chosen for GABA yield optimization. A one-factor-at-a-time strategy analysis of the GABA yield of FRT7 was performed, including the culture temperature, incubation time, inoculum volume, initial pH, the initial amount of monosodium glutamate (MSG), and pyridoxal 5'-phosphate (PLP) concentration, based on which the response surface methodology (RSM) was performed. After being cultured in an MRS culture medium supplemented with 3% MSG and 2 mmol/L of PLP at 40 °C with an initial pH of 7.0 for 48 h, the GABA reached a maximum yield of 1158.6 ± 21.22 mg/L. The results showed the experimental value of the GABA yield was in good agreement with the predicted values. Furthermore, the results from the RSM also indicated that the initial MSG addition, PLP concentration, and incubation time were significant variables. These results suggest that Lp. plantarum FRT7 has the potential to be a health-beneficial probiotic with commercial capabilities.
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Affiliation(s)
- Hongying Cai
- Key Laboratory of Feed Biotechnology of Ministry of Agriculture and Rural Affairs, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (H.C.); (X.L.); (D.L.); (W.L.); (Y.H.); (X.X.); (P.Y.)
- National Engineering Research Center of Biological Feed, Beijing 100081, China
| | - Xuan Li
- Key Laboratory of Feed Biotechnology of Ministry of Agriculture and Rural Affairs, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (H.C.); (X.L.); (D.L.); (W.L.); (Y.H.); (X.X.); (P.Y.)
| | - Daojie Li
- Key Laboratory of Feed Biotechnology of Ministry of Agriculture and Rural Affairs, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (H.C.); (X.L.); (D.L.); (W.L.); (Y.H.); (X.X.); (P.Y.)
| | - Weiwei Liu
- Key Laboratory of Feed Biotechnology of Ministry of Agriculture and Rural Affairs, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (H.C.); (X.L.); (D.L.); (W.L.); (Y.H.); (X.X.); (P.Y.)
| | - Yunsheng Han
- Key Laboratory of Feed Biotechnology of Ministry of Agriculture and Rural Affairs, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (H.C.); (X.L.); (D.L.); (W.L.); (Y.H.); (X.X.); (P.Y.)
| | - Xin Xu
- Key Laboratory of Feed Biotechnology of Ministry of Agriculture and Rural Affairs, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (H.C.); (X.L.); (D.L.); (W.L.); (Y.H.); (X.X.); (P.Y.)
| | - Peilong Yang
- Key Laboratory of Feed Biotechnology of Ministry of Agriculture and Rural Affairs, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (H.C.); (X.L.); (D.L.); (W.L.); (Y.H.); (X.X.); (P.Y.)
- National Engineering Research Center of Biological Feed, Beijing 100081, China
| | - Kun Meng
- Key Laboratory of Feed Biotechnology of Ministry of Agriculture and Rural Affairs, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (H.C.); (X.L.); (D.L.); (W.L.); (Y.H.); (X.X.); (P.Y.)
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Multi-Level Optimization and Strategies in Microbial Biotransformation of Nature Products. Molecules 2023; 28:molecules28062619. [PMID: 36985591 PMCID: PMC10051863 DOI: 10.3390/molecules28062619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/06/2023] [Accepted: 03/08/2023] [Indexed: 03/15/2023] Open
Abstract
Continuously growing demand for natural products with pharmacological activities has promoted the development of microbial transformation techniques, thereby facilitating the efficient production of natural products and the mining of new active compounds. Furthermore, due to the shortcomings and defects of microbial transformation, it is an important scientific issue of social and economic value to improve and optimize microbial transformation technology in increasing the yield and activity of transformed products. In this review, the aspects regarding the optimization of fermentation and the cross-disciplinary strategy, leading to the microbial transformation of increased levels of the high-efficiency process from natural products of a plant or microbial origin, were discussed. Additionally, due to the increasing craving for targeted and efficient methods for detecting transformed metabolites, analytical methods based on multiomics were also discussed. Such strategies can be well exploited and applied to the production of more efficient and more natural products from microbial resources.
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Thuy D, An N, Jayasena V, Vandamme P. A comprehensive investigation into the production of gamma-aminobutyric acid by Limosilactobacillus fermentum NG16, a tuna gut isolate. ACTA ALIMENTARIA 2022. [DOI: 10.1556/066.2022.00065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Abstract
Gamma-aminobutyric acid (GABA), a four-carbon non-protein amino acid, is widely known to have multiple physiological functions. The present study aimed to investigate the cultivation parameters for GABA production by a lactic acid bacteria (LAB) strain isolated from a tuna gut sample. Among 60 tuna gut LAB, only 7 Limosilactobacillus fermentum isolates, i.e. NG01, NG12, NG13, NG14, NG16, NG23, and NG27, were capable of GABA fermentation, with NG16 being the most potent GABA producer. The GABA production by isolate NG16 was therefore thoroughly characterised. The optimal batch culture conditions for GABA production were an initial cell density of 5×106 CFU mL−1, a monosodium glutamate concentration of 2%, an initial pH of 7, a fermentation temperature of 35 °C, and an incubation time of 96 h. Under this cultivation conditions, NG16 produced a maximum GABA yield of 25.52 ± 0.41 mM.
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Affiliation(s)
- D.T.B. Thuy
- Faculty of Engineering and Food Technology, Hue University of Agriculture and Forestry, Hue University, 49000, Vietnam
| | - N.T. An
- Faculty of Agriculture and Forestry, Dalat University, Dalat, 66000, Vietnam
| | - V. Jayasena
- School of Science, Western Sydney University, Sydney, NSW 2751, Australia
| | - P. Vandamme
- Laboratory of Microbiology, Department of Biochemistry and Microbiology, Ghent University, Ghent, Belgium
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Zhang Y, Zhao J, Wang X, Tang Y, Liu S, Wen T. Model-Guided Metabolic Rewiring for Gamma-Aminobutyric Acid and Butyrolactam Biosynthesis in Corynebacterium glutamicum ATCC13032. BIOLOGY 2022; 11:biology11060846. [PMID: 35741367 PMCID: PMC9219837 DOI: 10.3390/biology11060846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 05/16/2022] [Accepted: 05/30/2022] [Indexed: 11/16/2022]
Abstract
Gamma-aminobutyric acid (GABA) can be used as a bioactive component in the pharmaceutical industry and a precursor for the synthesis of butyrolactam, which functions as a monomer for the synthesis of polyamide 4 (nylon 4) with improved thermal stability and high biodegradability. The bio-based fermentation production of chemicals using microbes as a cell factory provides an alternative to replace petrochemical-based processes. Here, we performed model-guided metabolic engineering of Corynebacterium glutamicum for GABA and butyrolactam fermentation. A GABA biosynthetic pathway was constructed using a bi-cistronic expression cassette containing mutant glutamate decarboxylase. An in silico simulation showed that the increase in the flux from acetyl-CoA to α-ketoglutarate and the decrease in the flux from α-ketoglutarate to succinate drove more flux toward GABA biosynthesis. The TCA cycle was reconstructed by increasing the expression of acn and icd genes and deleting the sucCD gene. Blocking GABA catabolism and rewiring the transport system of GABA further improved GABA production. An acetyl-CoA-dependent pathway for in vivo butyrolactam biosynthesis was constructed by overexpressing act-encoding ß-alanine CoA transferase. In fed-batch fermentation, the engineered strains produced 23.07 g/L of GABA with a yield of 0.52 mol/mol from glucose and 4.58 g/L of butyrolactam. The metabolic engineering strategies can be used for genetic modification of industrial strains to produce target chemicals from α-ketoglutarate as a precursor, and the engineered strains will be useful to synthesize the bio-based monomer of polyamide 4 from renewable resources.
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Affiliation(s)
- Yun Zhang
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; (J.Z.); (X.W.); (Y.T.); (S.L.)
- Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China
- Correspondence: (Y.Z.); (T.W.)
| | - Jing Zhao
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; (J.Z.); (X.W.); (Y.T.); (S.L.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xueliang Wang
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; (J.Z.); (X.W.); (Y.T.); (S.L.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuan Tang
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; (J.Z.); (X.W.); (Y.T.); (S.L.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shuwen Liu
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; (J.Z.); (X.W.); (Y.T.); (S.L.)
- Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China
| | - Tingyi Wen
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; (J.Z.); (X.W.); (Y.T.); (S.L.)
- Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing 100049, China
- Correspondence: (Y.Z.); (T.W.)
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Peter SB, Qiao Z, Godspower HN, Ajeje SB, Xu M, Zhang X, Yang T, Rao Z. Biotechnological Innovations and Therapeutic Application of Pediococcus and Lactic Acid Bacteria: The Next-Generation Microorganism. Front Bioeng Biotechnol 2022; 9:802031. [PMID: 35237589 PMCID: PMC8883390 DOI: 10.3389/fbioe.2021.802031] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 12/08/2021] [Indexed: 01/27/2023] Open
Abstract
Lactic acid bacteria represent a worthwhile organism within the microbial consortium for the food sector, health, and biotechnological applications. They tend to offer high stability to environmental conditions, with an indicated increase in product yield, alongside their moderate antimicrobial activity. Lack of endotoxins and inclusion bodies, extracellular secretion, and surface display with other unique properties, are all winning attributes of these Gram-positive lactic acid bacteria, of which, Pediococcus is progressively becoming an attractive and promising host, as the next-generation probiotic comparable with other well-known model systems. Here, we presented the biotechnological developments in Pediococcal bacteriocin expression system, contemporary variegated models of Pediococcus and lactic acid bacteria strains as microbial cell factory, most recent applications as possible live delivery vector for use as therapeutics, as well as upsurging challenges and future perspective. With the radical introduction of artificial intelligence and neural network in Synthetic Biology, the microbial usage of lactic acid bacteria as an alternative eco-friendly strain, with safe use properties compared with the already known conventional strains is expected to see an increase in various food and biotechnological applications in years to come as it offers better hope of safety, accuracy, and higher efficiency.
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Affiliation(s)
- Sunday Bulus Peter
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Zhina Qiao
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Hero Nmeri Godspower
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Samaila Boyi Ajeje
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Meijuan Xu
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Xian Zhang
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Taowei Yang
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Zhiming Rao
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
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Wen J, Bao J. Improved fermentative γ-aminobutyric acid production by secretory expression of glutamate decarboxylase by Corynebacterium glutamicum. J Biotechnol 2021; 331:19-25. [PMID: 33711360 DOI: 10.1016/j.jbiotec.2021.03.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/24/2021] [Accepted: 03/01/2021] [Indexed: 02/01/2023]
Abstract
Fermentative production of γ-aminobutyric acid by the glutamate overproducing Corynebacterium glutamicum from cheap sugar feedstock is generally regarded as one of the most promising methods to reduce the production cost. However, the intracellularly expressed glutamate decarboxylase in C. glutamicum often showed feeble catalysis activity to convert glutamate into γ-aminobutyric acid. Here we tried to secretory express glutamate decarboxylase to achieve efficient extracellular decarboxylation of glutamate, thus improving the γ-aminobutyric acid production by C. glutamicum. We first tested glutamate decarboxylases from different sources, and the mutated glutamate decarboxylase GadBmut from E. coli with better catalytic performance was selected. Then, a signal peptide of the SEC translocation pathway directed the successful secretion of glutamate decarboxylase in C. glutamicum. The extracellular catalysis by secreted glutamate decarboxylase increased the γ-aminobutyric acid generation by three-fold, compared with intracellular catalysis. Enhancing glutamate decarboxylase expression and decreasing γ-aminobutyric acid degradation further increased γ-aminobutyric acid production by 39 %. The fed-batch fermentation of the engineered C. glutamicum strain reached the record high titer (77.6 ± 0.0 g /L), overall yield (0.44 ± 0.00 g/g glucose), and productivity (1.21 ± 0.00 g/L/h). This study demonstrated a unique design of extracellular catalysis for efficient γ-aminobutyric acid production by C. glutamicum.
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Affiliation(s)
- Jingbai Wen
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China; School of Chemical and Biological Engineering, Yichun University, 576 Xuefu Road, Yichun, Jiangxi 336000, China
| | - Jie Bao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
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Luo H, Liu Z, Xie F, Bilal M, Liu L, Yang R, Wang Z. Microbial production of gamma-aminobutyric acid: applications, state-of-the-art achievements, and future perspectives. Crit Rev Biotechnol 2021; 41:491-512. [PMID: 33541153 DOI: 10.1080/07388551.2020.1869688] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Gamma-aminobutyric acid (GABA) is an important non-protein amino acid with wide-ranging applications. Currently, GABA can be produced by a variety of methods, including chemical synthesis, plant enrichment, enzymatic methods, and microbial production. Among these methods, microbial production has gained increasing attention to meet the strict requirements of an additive in the fields of food, pharmaceutical, and livestock. In addition, renewable and abundant resources, such as glucose and lignocellulosic biomass can also be used for GABA microbial production under mild and environmentally friendly processing conditions. In this review, the applications, metabolic pathways and physiological functions of GABA in different microorganisms were firstly discussed. A comprehensive overview of the current status of process engineering strategies for enhanced GABA production, including fermentation optimization and whole-cell conversion from different feedstocks by various host strains is also provided. We also presented the state-of-the-art achievements in strain development strategies for industrial lactic acid bacteria (LAB), Corynebacterium glutamicum and Escherichia coli to enhance the performance of GABA bioproduction. In order to use bio-based GABA in the fields of food and pharmaceutical, some Generally Recognized as Safe (GRAS) strains such as LAB and C. glutamicum will be the promising chassis hosts. Toward the end of this review, current challenges and valuable research directions/strategies on the improvements of process and strain engineering for economic microbial production of GABA are also suggested.
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Affiliation(s)
- Hongzhen Luo
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, China
| | - Zheng Liu
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, China
| | - Fang Xie
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, China
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, China
| | - Lina Liu
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, China
| | - Rongling Yang
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, China
| | - Zhaoyu Wang
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, China
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Thuy DTB, Nguyen A, Khoo KS, Chew KW, Cnockaert M, Vandamme P, Ho YC, Huy ND, Cocoletzi HH, Show PL. Optimization of culture conditions for gamma-aminobutyric acid production by newly identified Pediococcus pentosaceus MN12 isolated from 'mam nem', a fermented fish sauce. Bioengineered 2020; 12:54-62. [PMID: 33350336 PMCID: PMC8291785 DOI: 10.1080/21655979.2020.1857626] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
This study was aimed to identify and optimize the culture conditions for gamma-aminobutyric acid (GABA) production by a lactic acid bacterium strain isolated from mam nem, a fermented fish sauce. Among the six isolates obtained from mam nem, the MN12 had the most potent GABA-producing capability. The strain was then identified to be Pedioccocus pentosaceus by employing MALDI-TOF-MS and phenylalanyl-tRNA synthase sequencing methods. The initial cell density of 5.106 CFU/mL, monosodium glutamate concentration of 60 mM, initial pH of 7, temperature of 45°C and cultivation time of 72 h were found to be the optimal culture conditions for highest production of GABA, reaching 27.9 ± 0.42 mM, by this strain. The cultivation conditions for GABA production by P. pentosaceus MN12 have been successfully optimized, providing a foundation for the development of fermented foods enriched with GABA.
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Affiliation(s)
- Do Thi Bich Thuy
- Hue University of Agriculture and Forestry, Hue Universit, Hue , Vietnam
| | - AnTien Nguyen
- Faculty of Agriculture and Forestry, Dalat University , Dalat, Vietnam
| | - Kuan Shiong Khoo
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia , Selangor Darul Ehsan, Malaysia
| | - Kit Wayne Chew
- School of Energy and Chemical Engineering, Xiamen University Malaysia, Jalan Sunsuria, Bandar Sunsuria , Sepang, Selangor, Malaysia
| | - Margo Cnockaert
- Laboratory of Microbiology, Department of Biochemistry and Microbiology, Ghent University , Ghent, Belgium
| | - Peter Vandamme
- Laboratory of Microbiology, Department of Biochemistry and Microbiology, Ghent University , Ghent, Belgium
| | - Yeek-Chia Ho
- Civil and Environmental Engineering Department, Universiti Teknologi PETRONAS , Seri Iskandar, Perak Darul Ridzuan, Malaysia.,Centre for Urban Resource Sustainability, Institute of Self-Sustainable Building, Universiti Teknologi PETRONAS , Perak Darul Ridzuan, Malaysia
| | - Nguyen Duc Huy
- Institute of Biotechnology, Hue University, Hue , Vietnam
| | | | - Pau Loke Show
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia , Selangor Darul Ehsan, Malaysia
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Diez-Gutiérrez L, San Vicente L, R. Barrón LJ, Villarán MDC, Chávarri M. Gamma-aminobutyric acid and probiotics: Multiple health benefits and their future in the global functional food and nutraceuticals market. J Funct Foods 2020. [DOI: 10.1016/j.jff.2019.103669] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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14
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Gießelmann G, Dietrich D, Jungmann L, Kohlstedt M, Jeon EJ, Yim SS, Sommer F, Zimmer D, Mühlhaus T, Schroda M, Jeong KJ, Becker J, Wittmann C. Metabolic Engineering of
Corynebacterium glutamicum
for High‐Level Ectoine Production: Design, Combinatorial Assembly, and Implementation of a Transcriptionally Balanced Heterologous Ectoine Pathway. Biotechnol J 2019; 14:e1800417. [DOI: 10.1002/biot.201800417] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Revised: 05/03/2019] [Indexed: 12/27/2022]
Affiliation(s)
- Gideon Gießelmann
- Institute of Systems BiotechnologySaarland University 66123 Saarbrücken Germany
| | - Demian Dietrich
- Institute of Systems BiotechnologySaarland University 66123 Saarbrücken Germany
| | - Lukas Jungmann
- Institute of Systems BiotechnologySaarland University 66123 Saarbrücken Germany
| | - Michael Kohlstedt
- Institute of Systems BiotechnologySaarland University 66123 Saarbrücken Germany
| | - Eun J. Jeon
- Department of Chemical and Biomolecular EngineeringKAIST 335 Gwahagno Yuseong‐gu Daejeon 305‐701 Republic of Korea
| | - Sung S. Yim
- Department of Chemical and Biomolecular EngineeringKAIST 335 Gwahagno Yuseong‐gu Daejeon 305‐701 Republic of Korea
| | - Frederik Sommer
- Department of Molecular Biotechnology and Systems BiologyTU Kaiserslautern Kaiserslautern 67663 Germany
| | - David Zimmer
- Department of Molecular Biotechnology and Systems BiologyTU Kaiserslautern Kaiserslautern 67663 Germany
| | - Timo Mühlhaus
- Department of Molecular Biotechnology and Systems BiologyTU Kaiserslautern Kaiserslautern 67663 Germany
| | - Michael Schroda
- Department of Molecular Biotechnology and Systems BiologyTU Kaiserslautern Kaiserslautern 67663 Germany
| | - Ki J. Jeong
- Department of Chemical and Biomolecular EngineeringKAIST 335 Gwahagno Yuseong‐gu Daejeon 305‐701 Republic of Korea
| | - Judith Becker
- Institute of Systems BiotechnologySaarland University 66123 Saarbrücken Germany
| | - Christoph Wittmann
- Institute of Systems BiotechnologySaarland University 66123 Saarbrücken Germany
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15
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Westbrook AW, Ren X, Moo‐Young M, Chou CP. Metabolic engineering ofBacillus subtilisforl‐valine overproduction. Biotechnol Bioeng 2018; 115:2778-2792. [DOI: 10.1002/bit.26789] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 07/04/2018] [Accepted: 07/06/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Adam W. Westbrook
- Department of Chemical EngineeringUniversity of WaterlooWaterloo Ontario Canada
| | - Xiang Ren
- Department of Chemical EngineeringUniversity of WaterlooWaterloo Ontario Canada
| | - Murray Moo‐Young
- Department of Chemical EngineeringUniversity of WaterlooWaterloo Ontario Canada
| | - C. Perry Chou
- Department of Chemical EngineeringUniversity of WaterlooWaterloo Ontario Canada
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16
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Wang Q, Liu X, Fu J, Wang S, Chen Y, Chang K, Li H. Substrate sustained release-based high efficacy biosynthesis of GABA by Lactobacillus brevis NCL912. Microb Cell Fact 2018; 17:80. [PMID: 29778094 PMCID: PMC5960080 DOI: 10.1186/s12934-018-0919-6] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 05/04/2018] [Indexed: 12/30/2022] Open
Abstract
Background Gamma-aminobutyric acid (GABA) plays a significant role in the food and drug industries. Our previous study established an efficient fed-batch fermentation process for Lactobacillus brevis NCL912 production of GABA from monosodium l-glutamate; however, monosodium l-glutamate may not be an ideal substrate, as it can result in the rapid increase of pH due to decarboxylation. Thus, in this study, l-glutamic acid was proposed as a substrate. To evaluate its potential, key components of the fermentation medium affecting GABA synthesis were re-screened and re-optimized to enhance GABA production from L. brevis NCL912. Results The initial fermentation medium (pH 3.3) used for optimization was: 50 g/L glucose, 25 g/L yeast extract, 10 mg/L manganese sulfate (MnSO4·H2O), 2 g/L Tween-80, and 220 g/L l-glutamic acid. Glucose, a nitrogen source, magnesium, and Tween-80 had notable effects on GABA production from the l-glutamic acid-based process; other factors showed no or marginal effects. The optimized levels of the four key components in the fermentation medium were 25 g/L glucose, 25 g/L yeast extract FM408, 25 mg/L MnSO4·H2O, and 2 g/L Tween-80. A simple and efficient fermentation process for the bioconversion of GABA by L. brevis NCL912 was subsequently developed in a 10 L fermenter as follows: fermentation medium, 5 L; glutamic acid, 295 g/L; inoculum, 10% (v/v); incubation temperature, 32 °C; and agitation, 100 rpm. After 48 h of fermentation, the final GABA concentration increased up to 205.8 ± 8.0 g/L. Conclusions l-Glutamic acid was superior to monosodium l-glutamate as a substrate in the bioproduction of GABA. Thus, a high efficacy bioprocess with 205 g/L GABA for L. brevis NCL912 was established. This strategy may provide an alternative for increasing the bioconversion of GABA.
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Affiliation(s)
- Qiong Wang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, People's Republic of China.,Sino-German Joint Research Institute, Nanchang University, Nanchang, 330047, People's Republic of China
| | - Xiaohua Liu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, People's Republic of China.,Sino-German Joint Research Institute, Nanchang University, Nanchang, 330047, People's Republic of China
| | - Jinheng Fu
- Sino-German Joint Research Institute, Nanchang University, Nanchang, 330047, People's Republic of China
| | - Shuixing Wang
- Sino-German Joint Research Institute, Nanchang University, Nanchang, 330047, People's Republic of China
| | - Yuanhong Chen
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, People's Republic of China.,Sino-German Joint Research Institute, Nanchang University, Nanchang, 330047, People's Republic of China
| | - Kunpeng Chang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, People's Republic of China.,Sino-German Joint Research Institute, Nanchang University, Nanchang, 330047, People's Republic of China
| | - Haixing Li
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, People's Republic of China. .,Sino-German Joint Research Institute, Nanchang University, Nanchang, 330047, People's Republic of China.
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17
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The Efficient Clade: Lactic Acid Bacteria for Industrial Chemical Production. Trends Biotechnol 2017; 35:756-769. [DOI: 10.1016/j.tibtech.2017.05.002] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 04/28/2017] [Accepted: 05/02/2017] [Indexed: 12/12/2022]
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18
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Somasundaram S, Tran KNT, Ravikumar S, Hong SH. Introduction of synthetic protein complex between Pyrococcus horikoshii glutamate decarboxylase and Escherichia coli GABA transporter for the improved production of GABA. Biochem Eng J 2017. [DOI: 10.1016/j.bej.2016.12.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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19
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Biotechnological advances and perspectives of gamma-aminobutyric acid production. World J Microbiol Biotechnol 2017; 33:64. [PMID: 28247260 DOI: 10.1007/s11274-017-2234-5] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 02/22/2017] [Indexed: 10/20/2022]
Abstract
Gamma-aminobutyric acid (GABA) is a four-carbon non-protein amino acid that is widely distributed among various organisms. Since GABA has several well-known physiological functions, such as mediating neurotransmission and hypotensive activity, as well as having tranquilizer effects, it is commonly used as a bioactive compound in the food, pharmaceutical and feed industries. The major pathway of GABA biosynthesis is the irreversible decarboxylation of L-glutamate catalyzed by glutamate decarboxylase (GAD), which develops a safe, sustainable and environmentally friendly alternative in comparison with traditional chemical synthesis methods. To date, several microorganisms have been successfully engineered for high-level GABA biosynthesis by overexpressing exogenous GADs. However, the activity of almost all reported microbial GADs sharply decreases at physiological near-neutral pH, which in turn provokes negative effects on the application of these GADs in the recombinant strains for GABA production. Therefore, ongoing efforts in the molecular evolution of GADs, in combination with high-throughput screening and metabolic engineering of particular producer strains, offer fascinating new prospects for effective, environmentally friendly and economically viable GABA biosynthesis. In this review, we briefly introduce the applications in which GABA is used, and summarize the most important methods associated with GABA production. The major achievements and present challenges in the biotechnological synthesis of GABA, focusing on screening and enzyme engineering of GADs, as well as metabolic engineering strategy for one-step GABA biosynthesis, will be extensively discussed.
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20
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Chang C, Zhang J, Ma S, Wang L, Wang D, Zhang J, Gao Q. Purification and characterization of glutamate decarboxylase from Enterococcus raffinosus TCCC11660. J Ind Microbiol Biotechnol 2017; 44:817-824. [PMID: 28101806 DOI: 10.1007/s10295-017-1906-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 01/09/2017] [Indexed: 02/02/2023]
Abstract
Glutamate decarboxylase (GAD) is the sole enzyme that synthesizes γ-aminobutyric acid through the irreversible decarboxylation of L-glutamate. In this study, the purification and characterization of an unreported GAD from a novel strain of Enterococcus raffinosus TCCC11660 were investigated. The native GAD from E. raffinosus TCCC11660 was purified 32.3-fold with a recovery rate of 8.3%, using ultrafiltration and ammonium sulfate precipitation, followed by ion-exchange and size-exclusion chromatography. The apparent molecular weight of purified GAD, as determined by SDS-PAGE and size-exclusion chromatography was 55 and 110 kDa, respectively, suggesting that GAD exists as a dimer of identical subunits in solution. In the best sodium citrate buffer, metal ions of Mo6+ and Mg2+ had positive effects, while Cu2+, Fe2+, Zn2+ and Co2+ showed significant adverse effects on enzyme activity. The optimum pH and temperature of GAD were determined to be 4.6 and 45 °C, while the K m and V max values for the sole L-glutamate substrate were 5.26 and 3.45 μmol L-1 min-1, respectively.
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Affiliation(s)
- Chuanyou Chang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - Jun Zhang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - Shenxi Ma
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - Lin Wang
- School of Computer Science and Information Engineering, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - Depei Wang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - Jian Zhang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - Qiang Gao
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China.
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21
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Li HG, Ma XX, Zhang QH, Luo W, Wu YQ, Li XH. Enhanced butanol production by solvent tolerance Clostridium acetobutylicum SE25 from cassava flour in a fibrous bed bioreactor. BIORESOURCE TECHNOLOGY 2016; 221:412-418. [PMID: 27660992 DOI: 10.1016/j.biortech.2016.08.120] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 08/25/2016] [Accepted: 08/26/2016] [Indexed: 05/02/2023]
Abstract
To enhance the butanol productivity and reduce the material cost, acetone, butanol, and ethanol fermentation by Clostridium acetobutylicum SE25 was investigated using batch, repeated-batch and continuous cultures in a fibrous bed bioreactor, where cassava flour was used as the substrate. With periodical nutrient supplementation, stable butanol production was maintained for about 360h in a 6-cycle repeated-batch fermentation with an average butanol productivity of 0.28g/L/h and butanol yield of 0.32g/g-starch. In addition, the highest butanol productivity of 0.63g/L/h and butanol yield of 0.36g/g-starch were achieved when the dilution rate were investigated in continuous production of acetone, butanol, and ethanol using a fibrous bed bioreactor, which were 231.6% and 28.6% higher than those of the free-cell fermentation. On the other hand, this study also successfully comfirmed that the biofilm can provide an effective protection for the microbial cells which are growing in stressful environment.
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Affiliation(s)
- Han-Guang Li
- College of Bioscience and Engineering, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, China
| | - Xing-Xing Ma
- College of Bioscience and Engineering, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, China
| | - Qing-Hua Zhang
- College of Bioscience and Engineering, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, China.
| | - Wei Luo
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Ya-Qing Wu
- College of Bioscience and Engineering, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, China
| | - Xun-Hang Li
- College of Bioscience and Engineering, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, China
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22
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Efficient bioconversion of L-glutamate to γ-aminobutyric acid by Lactobacillus brevis resting cells. J Ind Microbiol Biotechnol 2016; 44:697-704. [PMID: 27155855 DOI: 10.1007/s10295-016-1777-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 04/11/2016] [Indexed: 10/21/2022]
Abstract
This work investigated the efficient bioconversion process of L-glutamate to GABA by Lactobacillus brevis TCCC 13007 resting cells. The optimal bioconversion system was composed of 50 g/L 48 h cultivated wet resting cells, 0.1 mM pyridoxal phosphate in glutamate-containing 0.6 M citrate buffer (pH 4.5) and performed at 45 °C and 180 rpm. By 10 h bioconversion at the ratio of 80 g/L L-glutamic acid to 240 g/L monosodium glutamate, the final titer of GABA reached 201.18 g/L at the molar bioconversion ratio of 99.4 %. This process presents a potential for industrial and commercial applications and also offers a promising feasibility of continuous GABA production coupled with fermentation. Besides, the built kinetics model revealed that the optimum operating conditions were 45 °C and pH 4.5, and the bioconversion kinetics at low ranges of substrate concentration (0 < S < 80 g/L) was assumed to follow the classical Michaelis-Menten equation.
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23
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Li HG, Zhang QH, Yu XB, Wei L, Wang Q. Enhancement of butanol production in Clostridium acetobutylicum SE25 through accelerating phase shift by different phases pH regulation from cassava flour. BIORESOURCE TECHNOLOGY 2016; 201:148-155. [PMID: 26642220 DOI: 10.1016/j.biortech.2015.11.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Revised: 11/11/2015] [Accepted: 11/12/2015] [Indexed: 06/05/2023]
Abstract
A prominent delay with 12h was encountered in the phase shift from acidogenesis to solventogenesis in butanol production when the substrate-glucose was replaced by cassava flour. To solve this problem, different phase of pH regulation strategies were performed to shorten this delay time. With this effort, the phase shift occurred smoothly and the fermentation time was shortened. Under the optimal conditions, 16.24g/L butanol and 72h fermentation time were achieved, which were 25.3% higher and 14.3% shorter than those in the case of without pH regulation. Additionally, the effect of CaCO3 on "acid crash" and butanol production was also investigated. It was found that organic acids reassimilation would be of benefit to enhance butanol production. These results indicated that the simple but effective approach for acceleration of phase shift is a promising technique for shortening the fermentation time and improvement of butanol production.
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Affiliation(s)
- Han-guang Li
- College of Bioscience and Engineering, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, China; The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Qing-hua Zhang
- College of Bioscience and Engineering, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, China.
| | - Xiao-bin Yu
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Luo Wei
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Qiang Wang
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
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