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Pérez-García F, Brito LF, Bakken TI, Brautaset T. Riboflavin overproduction from diverse feedstocks with engineered Corynebacterium glutamicum. Biofabrication 2024; 16:045012. [PMID: 38996414 DOI: 10.1088/1758-5090/ad628e] [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: 03/19/2024] [Accepted: 07/12/2024] [Indexed: 07/14/2024]
Abstract
Riboflavin overproduction byCorynebacterium glutamicumwas achieved by screening synthetic operons, enabling fine-tuned expression of the riboflavin biosynthetic genesribGCAH.The synthetic operons were designed by means of predicted translational initiation rates of each open reading frame, with the best-performing selection enabling riboflavin overproduction without negatively affecting cell growth. Overexpression of the fructose-1,6-bisphosphatase (fbp) and 5-phosphoribosyl 1-pyrophosphate aminotransferase (purF) encoding genes was then done to redirect the metabolic flux towards the riboflavin precursors. The resulting strain produced 8.3 g l-1of riboflavin in glucose-based fed-batch fermentations, which is the highest reported riboflavin titer withC. glutamicum. Further genetic engineering enabled both xylose and mannitol utilization byC. glutamicum, and we demonstrated riboflavin overproduction with the xylose-rich feedstocks rice husk hydrolysate and spent sulfite liquor, and the mannitol-rich feedstock brown seaweed hydrolysate. Remarkably, rice husk hydrolysate provided 30% higher riboflavin yields compared to glucose in the bioreactors.
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Affiliation(s)
- Fernando Pérez-García
- Department of Biotechnology and Food Science, Faculty of Natural Sciences, Norwegian University of Science and Technology, Trondheim, Norway
| | - Luciana Fernandes Brito
- Department of Biotechnology and Food Science, Faculty of Natural Sciences, Norwegian University of Science and Technology, Trondheim, Norway
| | - Thea Isabel Bakken
- Department of Biotechnology and Food Science, Faculty of Natural Sciences, Norwegian University of Science and Technology, Trondheim, Norway
| | - Trygve Brautaset
- Department of Biotechnology and Food Science, Faculty of Natural Sciences, Norwegian University of Science and Technology, Trondheim, Norway
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Kulasekaran NT, Thilakam ML, Gopal D, Lee JK, Marimuthu J. Denovo production of resveratrol by engineered Saccharomyces cerevisiae W303-1a using pretreated Gracilaria corticata extracts. Biotechnol Lett 2024; 46:19-28. [PMID: 37987932 DOI: 10.1007/s10529-023-03441-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Revised: 09/05/2023] [Accepted: 10/01/2023] [Indexed: 11/22/2023]
Abstract
OBJECTIVE Assembly and construction of resveratrol production pathway in Saccharomyces cerevisiae for denovo production of resveratrol using seaweed extract as fermentation medium. RESULTS Genes involved in the production of resveratrol from tyrosine pathway, tyrosine ammonia lyase (FTAL) gene from Flavobacterium johnsoniae (FjTAL), the 4-coumarate:CoA ligase gene from Arabidopsis thaliana (4CL1) and the stilbene synthase gene from Vitis vinifera (VvSTS) were introduced into low copy, high copy and integrative vector and transformed into S. cerevisiae W303-1a. The resulting strains W303-1a/pARS-res5, W303-1a/2µ-res1 and W303-1a/IntUra-res9 produced a level of 2.39 ± 0.01, 3.33 ± 0.03 and 8.34 ± 0.03 mg resveratrol l-1 respectively. CRISPR mediated integration at the δ locus resulted in 17.13 ± 1.1 mg resveratrol l-1. Gracilaria corticata extract was tested as a substrate for the growth of transformant to produce resveratrol. The strain produced a comparable level, 13.6 ± 0.54 mg resveratrol l-1 when grown in seaweed extract medium. CONCLUSIONS The strain W303-1a/IntδC-res1 utilized Gracillaria hydrolysate and produced 13.6 ± 0.54 mg resveratrol l-1 and further investigations are being carried out focusing on pathway engineering and optimization of process parameters to enhance resveratrol yield.
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Affiliation(s)
| | - Mary Leema Thilakam
- Marine Biotechnology Division, National Institute of Ocean Technology, Chennai, 600100, India
| | - Dharani Gopal
- Marine Biotechnology Division, National Institute of Ocean Technology, Chennai, 600100, India
| | - Jung-Kul Lee
- Department of Chemical Engineering, Konkuk University, Seoul, 143 701, Korea
| | - Jeya Marimuthu
- Marine Biotechnology Division, National Institute of Ocean Technology, Chennai, 600100, India.
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Barreto JVDO, Casanova LM, Junior AN, Reis-Mansur MCPP, Vermelho AB. Microbial Pigments: Major Groups and Industrial Applications. Microorganisms 2023; 11:2920. [PMID: 38138065 PMCID: PMC10745774 DOI: 10.3390/microorganisms11122920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 11/28/2023] [Accepted: 11/29/2023] [Indexed: 12/24/2023] Open
Abstract
Microbial pigments have many structures and functions with excellent characteristics, such as being biodegradable, non-toxic, and ecologically friendly, constituting an important source of pigments. Industrial production presents a bottleneck in production cost that restricts large-scale commercialization. However, microbial pigments are progressively gaining popularity because of their health advantages. The development of metabolic engineering and cost reduction of the bioprocess using industry by-products opened possibilities for cost and quality improvements in all production phases. We are thus addressing several points related to microbial pigments, including the major classes and structures found, the advantages of use, the biotechnological applications in different industrial sectors, their characteristics, and their impacts on the environment and society.
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Affiliation(s)
| | | | | | | | - Alane Beatriz Vermelho
- Bioinovar Laboratory, Institute of Microbiology Paulo de Goes, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (J.V.d.O.B.); (L.M.C.); (A.N.J.); (M.C.P.P.R.-M.)
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Klein VJ, Brito LF, Perez-Garcia F, Brautaset T, Irla M. Metabolic engineering of thermophilic Bacillus methanolicus for riboflavin overproduction from methanol. Microb Biotechnol 2023; 16:1011-1026. [PMID: 36965151 PMCID: PMC10128131 DOI: 10.1111/1751-7915.14239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 02/08/2023] [Accepted: 02/10/2023] [Indexed: 03/27/2023] Open
Abstract
The growing need of next generation feedstocks for biotechnology spurs an intensification of research on the utilization of methanol as carbon and energy source for biotechnological processes. In this paper, we introduced the methanol-based overproduction of riboflavin into metabolically engineered Bacillus methanolicus MGA3. First, we showed that B. methanolicus naturally produces small amounts of riboflavin. Then, we created B. methanolicus strains overexpressing either homologous or heterologous gene clusters encoding the riboflavin biosynthesis pathway, resulting in riboflavin overproduction. Our results revealed that the supplementation of growth media with sublethal levels of chloramphenicol contributes to a higher plasmid-based riboflavin production titre, presumably due to an increase in plasmid copy number and thus biosynthetic gene dosage. Based on this, we proved that riboflavin production can be increased by exchanging a low copy number plasmid with a high copy number plasmid leading to a final riboflavin titre of about 523 mg L-1 in methanol fed-batch fermentation. The findings of this study showcase the potential of B. methanolicus as a promising host for methanol-based overproduction of extracellular riboflavin and serve as basis for metabolic engineering of next generations of riboflavin overproducing strains.
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Affiliation(s)
- Vivien Jessica Klein
- Department of Biotechnology and Food Science, Norwegian University of Science and Technology, Trondheim, Norway
| | - Luciana Fernandes Brito
- Department of Biotechnology and Food Science, Norwegian University of Science and Technology, Trondheim, Norway
| | - Fernando Perez-Garcia
- Department of Biotechnology and Food Science, Norwegian University of Science and Technology, Trondheim, Norway
| | - Trygve Brautaset
- Department of Biotechnology and Food Science, Norwegian University of Science and Technology, Trondheim, Norway
| | - Marta Irla
- Department of Biological and Chemical Engineering, Aarhus University, Aarhus, Denmark
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Xin B, Zhong C, Wang Y. Integrating the marine carbon resource mannitol into biomanufacturing. Trends Biotechnol 2023; 41:745-749. [PMID: 36610892 DOI: 10.1016/j.tibtech.2022.12.010] [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: 11/24/2022] [Revised: 12/15/2022] [Accepted: 12/16/2022] [Indexed: 01/07/2023]
Abstract
Mannitol is a readily accessible component of seaweed with higher energy content than glucose, making it a promising feedstock for biomanufacturing. Microorganisms have been engineered for converting mannitol into various bioproducts. Microbial strain discovery and synthetic biology approach will advance biomanufacturing using mannitol and other complex components of marine biomass.
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Affiliation(s)
- Bo Xin
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China; Key Laboratory of Industrial Fermentation Microbiology (Ministry of Education), Tianjin University of Science and Technology, Tianjin 300457, China
| | - Cheng Zhong
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China; Key Laboratory of Industrial Fermentation Microbiology (Ministry of Education), Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Yu Wang
- Key Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China; National Technology Innovation Center of Synthetic Biology, Tianjin 300308, China.
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Woo S, Moon JH, Sung J, Baek D, Shon YJ, Jung GY. Recent Advances in the Utilization of Brown Macroalgae as Feedstock for Microbial Biorefinery. BIOTECHNOL BIOPROC E 2022. [DOI: 10.1007/s12257-022-0301-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Pakalın B, Kupejović E, Bastem GM, Sayar NA, Wendisch VF, Akbulut BS. Valorization of hazelnut husk as a carbon source for l-DOPA production with Corynebacterium glutamicum. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Nie L, He Y, Hu L, Zhu X, Wu X, Zhang B. Improvement in L-ornithine production from mannitol via transcriptome-guided genetic engineering in Corynebacterium glutamicum. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2022; 15:97. [PMID: 36123702 PMCID: PMC9484086 DOI: 10.1186/s13068-022-02198-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 09/10/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND L-Ornithine is an important medicinal intermediate that is mainly produced by microbial fermentation using glucose as the substrate. To avoid competition with human food resources, there is an urgent need to explore alternative carbon sources for L-ornithine production. In a previous study, we constructed an engineered strain, Corynebacterium glutamicum MTL13, which produces 54.56 g/L of L-ornithine from mannitol. However, compared with the titers produced using glucose as a substrate, the results are insufficient, and further improvement is required. RESULTS In this study, comparative transcriptome profiling of MTL01 cultivated with glucose or mannitol was performed to identify novel targets for engineering L-ornithine-producing strains. Guided by the transcriptome profiling results, we modulated the expression of qsuR (encoding a LysR-type regulator QsuR), prpC (encoding 2-methylcitrate synthase PrpC), pdxR (encoding a MocR-type regulator PdxR), acnR (encoding a TetR-type transcriptional regulator AcnR), CGS9114_RS08985 (encoding a hypothetical protein), and CGS9114_RS09730 (encoding a TetR/AcrR family transcriptional regulator), thereby generating the engineered strain MTL25 that can produce L-ornithine at a titer of 93.6 g/L, representing a 71.6% increase as compared with the parent strain MTL13 and the highest L-ornithine titer reported so far for C. glutamicum. CONCLUSIONS This study provides novel indirect genetic targets for enhancing L-ornithine accumulation on mannitol and lays a solid foundation for the biosynthesis of L-ornithine from marine macroalgae, which is farmed globally as a promising alternative feedstock.
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Affiliation(s)
- Libin Nie
- Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Jiangxi Agricultural University, Nanchang, 330045, China
- College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang, 330045, China
| | - Yutong He
- Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Jiangxi Agricultural University, Nanchang, 330045, China
- College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang, 330045, China
| | - Lirong Hu
- Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Jiangxi Agricultural University, Nanchang, 330045, China
- College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang, 330045, China
| | - Xiangdong Zhu
- Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Jiangxi Agricultural University, Nanchang, 330045, China
- College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang, 330045, China
| | - Xiaoyu Wu
- Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Jiangxi Agricultural University, Nanchang, 330045, China
- College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang, 330045, China
| | - Bin Zhang
- Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Jiangxi Agricultural University, Nanchang, 330045, China.
- College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang, 330045, China.
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Dobrowolski A, Nawijn W, Mirończuk AM. Brown seaweed hydrolysate as a promising growth substrate for biomass and lipid synthesis of the yeast yarrowia lipolytica. Front Bioeng Biotechnol 2022; 10:944228. [PMID: 36061426 PMCID: PMC9428158 DOI: 10.3389/fbioe.2022.944228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Accepted: 07/29/2022] [Indexed: 11/21/2022] Open
Abstract
Biomass of the brown algae Fucus vesiculosus and Saccharina latissima is a promising, renewable feedstock because of the high growth rate, accessibility and content of glucose and mannitol. Saccharification of seaweeds is a simple process due to the lack of lignocellulose in the cell wall. The high content of glucose and mannitol makes these seaweeds an attractive feedstock for lipid production in the yeast Yarrowia lipolytica. This study demonstrated that hydrolysates of brown algae biomass can be applied as a substrate for synthesis of yeast biomass and lipids without any supplementation. To increase the lipid titer in yeast biomass, we employed an engineered strain of Y. lipolytica overexpressing DGA1/DGA2. In consequence, the C/N ratio has a lower impact on lipid synthesis. Moreover, the applied substrates allowed for high synthesis of unsaturated fatty acids (UFA); the level exceeded 90% in the fatty acid pool. Oleic (C18:1) and linoleic acids (C18:2) achieved the highest content. The study showed that Y. lipolytica is able to grow on the seaweed hydrolysate and produces a high content of UFA in the biomass.
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Pérez-García F, Brito LF, Irla M, Jorge JMP, Sgobba E. Editorial: Promising and sustainable microbial feedstocks for biotechnological processes. Front Microbiol 2022; 13:973723. [PMID: 35923410 PMCID: PMC9343074 DOI: 10.3389/fmicb.2022.973723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 06/30/2022] [Indexed: 11/13/2022] Open
Affiliation(s)
- Fernando Pérez-García
- Department of Biotechnology and Food Science, Norwegian University of Science and Technology, Trondheim, Norway
- *Correspondence: Fernando Pérez-García
| | - Luciana F. Brito
- Department of Biotechnology and Food Science, Norwegian University of Science and Technology, Trondheim, Norway
| | - Marta Irla
- Department of Biological and Chemical Engineering, Aarhus University, Aarhus, Denmark
| | - João M. P. Jorge
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa Oeiras, Lisbon, Portugal
| | - Elvira Sgobba
- Faculty of Science and Technology, Umeå Plant Science Centre, Umeå University Umeå, Umeå, Sweden
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Rational Engineering of Non-Ubiquinone Containing Corynebacterium glutamicum for Enhanced Coenzyme Q10 Production. Metabolites 2022; 12:metabo12050428. [PMID: 35629932 PMCID: PMC9145305 DOI: 10.3390/metabo12050428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 05/07/2022] [Accepted: 05/09/2022] [Indexed: 11/17/2022] Open
Abstract
Coenzyme Q10 (CoQ10) is a lipid-soluble compound with important physiological functions and is sought after in the food and cosmetic industries owing to its antioxidant properties. In our previous proof of concept, we engineered for CoQ10 biosynthesis the industrially relevant Corynebacterium glutamicum, which does not naturally synthesize any CoQ. Here, liquid chromatography–mass spectrometry (LC–MS) analysis identified two metabolic bottlenecks in the CoQ10 production, i.e., low conversion of the intermediate 10-prenylphenol (10P-Ph) to CoQ10 and the accumulation of isoprenologs with prenyl chain lengths of not only 10, but also 8 to 11 isopentenyl units. To overcome these limitations, the strain was engineered for expression of the Ubi complex accessory factors UbiJ and UbiK from Escherichia coli to increase flux towards CoQ10, and by replacement of the native polyprenyl diphosphate synthase IspB with a decaprenyl diphosphate synthase (DdsA) to select for prenyl chains with 10 isopentenyl units. The best strain UBI6-Rs showed a seven-fold increased CoQ10 content and eight-fold increased CoQ10 titer compared to the initial strain UBI4-Pd, while the abundance of CoQ8, CoQ9, and CoQ11 was significantly reduced. This study demonstrates the application of the recent insight into CoQ biosynthesis to improve metabolic engineering of a heterologous CoQ10 production strain.
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