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Du F, Hang Y, Zhang F, Li X, Zheng Y, Zhang Z, Ma W, Sun X. Improving Precursor Supply and Optimizing the Fermentation Process for High-Level Production of Docosapentaenoic Acid in Yarrowia Lipolytica. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2025; 73:12867-12876. [PMID: 40240149 DOI: 10.1021/acs.jafc.5c01480] [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: 04/18/2025]
Abstract
Docosapentaenoic acid (DPA) is widely applied in medicine and health products because of its important physiological functions. Using microbial cell factories for DPA production is considered a viable alternative to extracting DPA from seal oil. In this study, an engineering strategy for the efficient production of DPA was developed. First, the DPA biosynthesis pathway was successfully established in Yarrowia lipolytica. Then, the increase of acetyl-CoA by engineering citrate metabolism and malonyl-CoA by introducing a new orthogonal malonyl-CoA synthesis pathway was to further enhance DPA production. Furthermore, overexpression of glucose-6-phosphate dehydrogenase (G6PDH) and malic enzyme (ME) enhanced NADPH availability. Finally, by optimizing the fermentation conditions, the DPA content of the engineered strain reached 40.0%, and the yield reached 13.0 g/L in the 5 L bioreactor, representing the highest levels reported so far in Y. lipolytica. This study provides a promising strategy to construct microbial cell factories for fatty acid biosynthesis.
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Affiliation(s)
- Fei Du
- State Key Laboratory of Microbial Technology, Nanjing Normal University, Nanjing 210023, People's Republic of China
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - Yiwen Hang
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - Feng Zhang
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - Xin Li
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - Yi Zheng
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - Zixu Zhang
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - Wang Ma
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - Xiaoman Sun
- State Key Laboratory of Microbial Technology, Nanjing Normal University, Nanjing 210023, People's Republic of China
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, People's Republic of China
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Bi H, Xu C, Bao Y, Zhang C, Wang K, Zhang Y, Wang M, Chen B, Fang Y, Tan T. Enhancing precursor supply and modulating metabolism to achieve high-level production of β-farnesene in Yarrowia lipolytica. BIORESOURCE TECHNOLOGY 2023; 382:129171. [PMID: 37196740 DOI: 10.1016/j.biortech.2023.129171] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 05/09/2023] [Accepted: 05/11/2023] [Indexed: 05/19/2023]
Abstract
β-Farnesene is a sesquiterpene commonly found in essential oils of plants, with applications spanning from agricultural pest control and biofuels to industrial chemicals. The use of renewable substrates in microbial cell factories offers a sustainable approach to β-farnesene biosynthesis. In this study, malic enzyme from Mucor circinelloides was examined for NADPH regeneration, concomitant with the augmentation of cytosolic acetyl-CoA supply by expressing ATP-citrate lyase from Mus musculus and manipulating the citrate pathway via AMP deaminase and isocitrate dehydrogenase. Carbon flux was modulated through the elimination of native 6-phosphofructokinase, while the incorporation of an exogenous non-oxidative glycolysis pathway served to bridge the pentose phosphate pathway with the mevalonate pathway. The resulting orthogonal precursor supply pathway facilitated β-farnesene production, reaching 810 mg/L in shake-flask fermentation. Employing optimal fermentation conditions and feeding strategy, a titer of 28.9 g/L of β-farnesene was attained in a 2 L bioreactor.
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Affiliation(s)
- Haoran Bi
- National Energy R&D Center of Biorefinery, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Chenchen Xu
- National Energy R&D Center of Biorefinery, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Yufei Bao
- National Energy R&D Center of Biorefinery, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Changwei Zhang
- National Energy R&D Center of Biorefinery, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Kai Wang
- National Energy R&D Center of Biorefinery, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Yang Zhang
- National Energy R&D Center of Biorefinery, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Meng Wang
- National Energy R&D Center of Biorefinery, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, P.R. China.
| | - Biqiang Chen
- National Energy R&D Center of Biorefinery, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Yunming Fang
- National Energy R&D Center of Biorefinery, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Tianwei Tan
- National Energy R&D Center of Biorefinery, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, P.R. China.
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Billerach G, Preziosi-Belloy L, Lin CSK, Fulcrand H, Dubreucq E, Grousseau E. Impact of nitrogen deficiency on succinic acid production by engineered strains of Yarrowia lipolytica. J Biotechnol 2021; 336:30-40. [PMID: 34090952 DOI: 10.1016/j.jbiotec.2021.06.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 05/31/2021] [Accepted: 06/01/2021] [Indexed: 10/21/2022]
Abstract
Yarrowia lipolytica strains PGC01003 and PGC202 engineered for succinic acid production were studied and compared to the wild type strain W29. For the first time, these two strains were characterized in a chemically defined medium. Strain growth and organic acid production were investigated in fed-batch mode with glycerol as carbon and energy source. This study evaluated the impact of nitrogen deficiency strategy to redirect carbon flux toward succinic acid synthesis. Strain PGC01003 produced 19 g L-1 succinic acid with an overall yield of 0.23 g g-1 and an overall productivity of 0.23 g L-1 h-1, while strain PGC202 produced 33 g L-1 succinic acid with an overall yield of 0.12 g g-1 and a productivity of 0.57 g L-1 h-1. Nitrogen limitation effectively stopped biomass growth and increased succinic acid yield of PGC01003 and PGC202 by 18 % and 62 %, respectively. However, the specific succinic acid production rate was reduced by 77 % and 66 %, respectively.
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Affiliation(s)
- Guillaume Billerach
- UMR IATE (INRAE, L'Institut Agro-Montpellier SupAgro, University of Montpellier), Montpellier, France.
| | - Laurence Preziosi-Belloy
- UMR IATE (INRAE, L'Institut Agro-Montpellier SupAgro, University of Montpellier), Montpellier, France.
| | - Carol Sze Ki Lin
- School of Energy and Environment, City University of Hong Kong, Hong Kong.
| | - Hélène Fulcrand
- UMR IATE (INRAE, L'Institut Agro-Montpellier SupAgro, University of Montpellier), Montpellier, France.
| | - Eric Dubreucq
- UMR IATE (INRAE, L'Institut Agro-Montpellier SupAgro, University of Montpellier), Montpellier, France.
| | - Estelle Grousseau
- UMR IATE (INRAE, L'Institut Agro-Montpellier SupAgro, University of Montpellier), Montpellier, France.
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4
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Li N, Han Z, O'Donnell TJ, Kurasaki R, Kajihara L, Williams PG, Tang Y, Su WW. Production and excretion of astaxanthin by engineered Yarrowia lipolytica using plant oil as both the carbon source and the biocompatible extractant. Appl Microbiol Biotechnol 2020; 104:6977-6989. [PMID: 32601736 DOI: 10.1007/s00253-020-10753-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 06/05/2020] [Accepted: 06/16/2020] [Indexed: 11/27/2022]
Abstract
This study aimed to develop a bioprocess using plant oil as the carbon source for lipid-assimilating yeast to produce high-value astaxanthin. Using high-oleic safflower oil as a model, efficient cell growth and astaxanthin production by the engineered Yarrowia lipolytica strain ST7403 was demonstrated, and a considerable portion of astaxanthin was found excreted into the spent oil. Astaxanthin was the predominant carotenoid in the extracellular oil phase that allowed facile in situ recovery of astaxanthin without cell lysis. Autoclaving the safflower oil medium elevated the peroxide level but it declined quickly during fermentation (reduced by 84% by day 3) and did not inhibit cell growth or astaxanthin production. In a 1.5-L fed-batch bioreactor culture with a YnB-based medium containing 20% safflower oil, and with the feeding of casamino acids, astaxanthin production reached 54 mg/L (53% excreted) in 28 days. Further improvement in astaxanthin titer and productivity was achieved by restoring leucine biosynthesis in the host, and running fed-batch fermentation using a high carbon-to-nitrogen ratio yeast extract/peptone medium containing 70% safflower oil, with feeding of additional yeast extract/peptone, to attain 167 mg/L astaxanthin (48% excreted) in 9.5 days of culture. These findings facilitate industrial microbial biorefinery development that utilizes renewable lipids as feedstocks to not only produce high-value products but also effectively extract and recover the products, including non-native ones.Key Points• Yarrowia lipolytica can use plant oil as a C-source for astaxanthin production.• Astaxanthin is excreted and accumulated in the extracellular oil phase.• Astaxanthin is the predominant carotenoid in the extracellular oil phase.• Plant oil serves as a biocompatible solvent for in situ astaxanthin extraction. Graphical abstract.
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Affiliation(s)
- Ningyang Li
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, HI, 96822, USA.,Key Laboratory of Food Processing Technology and Quality Control in Shandong Province, College of Food Science & Engineering, Shandong Agricultural University, Tai'an, 271018, China
| | - Zhenlin Han
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, HI, 96822, USA
| | - Timothy J O'Donnell
- Department of Chemistry, University of Hawaii at Manoa, Honolulu, HI, 96822, USA
| | - Ryan Kurasaki
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, HI, 96822, USA
| | - Lexie Kajihara
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, HI, 96822, USA
| | - Philip G Williams
- Department of Chemistry, University of Hawaii at Manoa, Honolulu, HI, 96822, USA
| | - Yinjie Tang
- Department of Energy, Environmental and Chemical Engineering, Washington University in St Louis, St. Louis, MO, 63130, USA
| | - Wei Wen Su
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, HI, 96822, USA.
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5
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Fickers P, Cheng H, Sze Ki Lin C. Sugar Alcohols and Organic Acids Synthesis in Yarrowia lipolytica: Where Are We? Microorganisms 2020; 8:E574. [PMID: 32326622 PMCID: PMC7232202 DOI: 10.3390/microorganisms8040574] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 04/09/2020] [Accepted: 04/13/2020] [Indexed: 01/01/2023] Open
Abstract
Sugar alcohols and organic acids that derive from the metabolism of certain microorganisms have a panoply of applications in agro-food, chemical and pharmaceutical industries. The main challenge in their production is to reach a productivity threshold that allow the process to be profitable. This relies on the construction of efficient cell factories by metabolic engineering and on the development of low-cost production processes by using industrial wastes or cheap and widely available raw materials as feedstock. The non-conventional yeast Yarrowia lipolytica has emerged recently as a potential producer of such metabolites owing its low nutritive requirements, its ability to grow at high cell densities in a bioreactor and ease of genome edition. This review will focus on current knowledge on the synthesis of the most important sugar alcohols and organic acids in Y. lipolytica.
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Affiliation(s)
- Patrick Fickers
- Microbial Process and Interactions, TERRA Teaching and Research Centre, University of Liege—Gembloux Agro-Bio Tech, 5030 Gembloux, Belgium
| | - Hairong Cheng
- State Key Laboratory of Microbial Metabolism, School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China;
| | - Carol Sze Ki Lin
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong;
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Morgunov IG, Kamzolova SV, Karpukhina OV, Bokieva SB, Lunina JN, Inozemtsev AN. Microbiological Production of Isocitric Acid from Biodiesel Waste and Its Effect on Spatial Memory. Microorganisms 2020; 8:E462. [PMID: 32218311 PMCID: PMC7232500 DOI: 10.3390/microorganisms8040462] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 02/15/2020] [Accepted: 03/23/2020] [Indexed: 11/17/2022] Open
Abstract
Within this work, the microbial synthesis of (2R,3S)-isocitric acid (ICA), a metabolite of the nonconventional yeast Yarrowia lipolytica, from biodiesel waste, has been studied. The selected strain Y. lipolytica VKM Y-2373 synthesized ICA with citric acid (CA) as a byproduct. This process can be regulated by changing cultivation conditions. The maximal production of ICA with the minimal formation of the byproduct was provided by the use of a concentration of (NH4)2SO4 (6 g/L); the addition of biodiesel waste to cultivation medium in 20-60 g/L portions; maintaining the pH of the cultivation medium at 6, and degree of aeration between 25% and 60% of saturation. Itaconic acid at a concentration of 15 mM favorably influenced the production of ICA by the selected strain. The optimization of cultivation conditions allowed us to increase the concentration of ICA in the culture liquid from 58.32 to 90.2 g/L, the product yield (Y) by 40%, and the ICA/CA ratio from 1.1:1 to 3:1. Research on laboratory animals indicated that ICA counteracted the negative effect of ammonium molybdate (10-5 М) and lead diacetate (10-7 М) on the learning and spatial memory of rats, including those exposed to emotional stress.
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Affiliation(s)
- Igor G. Morgunov
- Federal Research Center, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms of the Russian Academy of Sciences, Prospect Nauki 5, Pushchino, 142290 Moscow Region, Russia;
| | - Svetlana V. Kamzolova
- Federal Research Center, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms of the Russian Academy of Sciences, Prospect Nauki 5, Pushchino, 142290 Moscow Region, Russia;
| | - Olga V. Karpukhina
- Department of Higher Nervous Activity, Faculty of Biology, Lomonosov Moscow State University, 1-12 Leninskie Gory, 119234 Moscow, Russia; (O.V.K.); (A.N.I.)
| | - Svetlana B. Bokieva
- Department of Anatomy, Physiology and Botany, Khetagurov North Ossetian State University, 44-46 Vatutina str, 362025 Vladikavkaz, North Ossetia, Russia;
| | - Julia N. Lunina
- Federal Research Center, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms of the Russian Academy of Sciences, Prospect Nauki 5, Pushchino, 142290 Moscow Region, Russia;
| | - Anatoly N. Inozemtsev
- Department of Higher Nervous Activity, Faculty of Biology, Lomonosov Moscow State University, 1-12 Leninskie Gory, 119234 Moscow, Russia; (O.V.K.); (A.N.I.)
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7
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Comparison and Analysis of Published Genome-scale Metabolic Models of Yarrowia lipolytica. BIOTECHNOL BIOPROC E 2020. [DOI: 10.1007/s12257-019-0208-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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8
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Rani A, Negi S, Hussain A, Kumar S. Treatment of urban municipal landfill leachate utilizing garbage enzyme. BIORESOURCE TECHNOLOGY 2020; 297:122437. [PMID: 31786032 DOI: 10.1016/j.biortech.2019.122437] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 11/12/2019] [Accepted: 11/13/2019] [Indexed: 05/27/2023]
Abstract
In the present study, an attempt has been made to extend the application of garbage enzyme (GE) (fermented mixture of jaggery, organic waste, and water in the ratio 1:3:10) from the domestic wastewater to the urban municipal landfill leachate of Ghazipur, Okhla and Bhalswa landfill sites of Delhi (India). The Leachate Pollution Index (LPI) has been found to be 27.6, 25.4 and 29.2, respectively. The competence of GE was assessed by comparing the initial and final LPIs. The GE was added to the leachate for the contact period of 7-28 days under different mix proportions of 5%, 10%, 15%, and 20%. The maximum final LPI reduction of 74.75% was observed in the Okhla landfill leachate for mixing the proportion of 20% GE after 28 days. However, the mixing ratio of 5% GE showed significant reduction of 60.61% and 55.12% in the final LPI of Ghazipur and Bhalswa landfill leachate, respectively.
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Affiliation(s)
- Aishwarya Rani
- National Ilan University, Yilan City, Taiwan, ROC; CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nagpur, Maharashtra, India
| | - Suraj Negi
- National Taipei University of Technology, Taipei, Taiwan, ROC; CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nagpur, Maharashtra, India
| | - Athar Hussain
- Ch Brahm Prakash Government Engineering College, New Delhi, India
| | - Sunil Kumar
- CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nagpur, Maharashtra, India.
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Do DTH, Theron CW, Fickers P. Organic Wastes as Feedstocks for Non-Conventional Yeast-Based Bioprocesses. Microorganisms 2019; 7:E229. [PMID: 31370226 PMCID: PMC6722544 DOI: 10.3390/microorganisms7080229] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Revised: 07/26/2019] [Accepted: 07/29/2019] [Indexed: 12/22/2022] Open
Abstract
Non-conventional yeasts are efficient cell factories for the synthesis of value-added compounds such as recombinant proteins, intracellular metabolites, and/or metabolic by-products. Most bioprocess, however, are still designed to use pure, ideal sugars, especially glucose. In the quest for the development of more sustainable processes amid concerns over the future availability of resources for the ever-growing global population, the utilization of organic wastes or industrial by-products as feedstocks to support cell growth is a crucial approach. Indeed, vast amounts of industrial and commercial waste simultaneously represent an environmental burden and an important reservoir for recyclable or reusable material. These alternative feedstocks can provide microbial cell factories with the required metabolic building blocks and energy to synthesize value-added compounds, further representing a potential means of reduction of process costs as well. This review highlights recent strategies in this regard, encompassing knowledge on catabolic pathways and metabolic engineering solutions developed to endow cells with the required metabolic capabilities, and the connection of these to the synthesis of value-added compounds. This review focuses primarily, but not exclusively, on Yarrowia lipolytica as a yeast cell factory, owing to its broad range of naturally metabolizable carbon sources, together with its popularity as a non-conventional yeast.
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Affiliation(s)
- Diem T Hoang Do
- Microbial Processes and Interactions, TERRA Teaching and Research Centre, University of Liège - Gembloux AgroBio Tech, Av. de la Faculté, 2B. B-5030 Gembloux, Belgium
| | - Chrispian W Theron
- Microbial Processes and Interactions, TERRA Teaching and Research Centre, University of Liège - Gembloux AgroBio Tech, Av. de la Faculté, 2B. B-5030 Gembloux, Belgium
| | - Patrick Fickers
- Microbial Processes and Interactions, TERRA Teaching and Research Centre, University of Liège - Gembloux AgroBio Tech, Av. de la Faculté, 2B. B-5030 Gembloux, Belgium.
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10
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Morgunov IG, Kamzolova SV, Karpukhina OV, Bokieva SB, Inozemtsev AN. Biosynthesis of isocitric acid in repeated-batch culture and testing of its stress-protective activity. Appl Microbiol Biotechnol 2019; 103:3549-3558. [PMID: 30852660 DOI: 10.1007/s00253-019-09729-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 02/18/2019] [Accepted: 02/25/2019] [Indexed: 12/25/2022]
Abstract
Biosynthesis of Ds(+)-threo-isocitric acid from ethanol in the Yarrowia lipolytica batch and repeated-batch cultures was studied. Repeated-batch cultivation was found to provide for a good biosynthetic efficiency of the producer for as long as 748 h, probably due to maintenance of high activities of enzymes involved in the biosynthesis of isocitric acid. Under optimal repeated-batch cultivation conditions, the producer accumulated 109.6 g/L Ds(+)-threo-isocitric acid with a production rate of 1.346 g/L h. The monopotassium salt of isocitric acid isolated from the culture liquid and purified to 99.9% was found to remove neurointoxication, to restore memory, and to improve the learning of laboratory rats intoxicated with lead and molybdenum salts. Taking into account the fact that the neurotoxic effect of heavy metals is mainly determined by oxidative stress, the aforementioned favorable action of isocitric acid on the intoxicated rats can be explained by its antioxidant activity among other pharmacological effects.
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Affiliation(s)
- Igor G Morgunov
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Federal Research Center "Pushchino Center for Biological Research of the Russian Academy of Sciences", Prospect Nauki 5, Pushchino, Moscow Region, 142290, Russia.
| | - Svetlana V Kamzolova
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Federal Research Center "Pushchino Center for Biological Research of the Russian Academy of Sciences", Prospect Nauki 5, Pushchino, Moscow Region, 142290, Russia
| | - Olga V Karpukhina
- Department of Higher Nervous Activity, Faculty of Biology, Lomonosov Moscow State University, 1-12 Leninskie Gory, Moscow, 119234, Russia.,Semenov Institute of Chemical Physics, Russian Academy of Sciences, 4 Kosygina str, Moscow, 119991, Russia
| | - Svetlana B Bokieva
- Khetagurov North Ossetian State University, 44-46 Vatutina str, Vladikavkaz, North Ossetia, 362025, Russia
| | - Anatoly N Inozemtsev
- Department of Higher Nervous Activity, Faculty of Biology, Lomonosov Moscow State University, 1-12 Leninskie Gory, Moscow, 119234, Russia
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11
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Kallscheuer N. Engineered Microorganisms for the Production of Food Additives Approved by the European Union-A Systematic Analysis. Front Microbiol 2018; 9:1746. [PMID: 30123195 PMCID: PMC6085563 DOI: 10.3389/fmicb.2018.01746] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 07/12/2018] [Indexed: 01/16/2023] Open
Abstract
In the 1950s, the idea of a single harmonized list of food additives for the European Union arose. Already in 1962, the E-classification system, a robust food safety system intended to protect consumers from possible food-related risks, was introduced. Initially, it was restricted to colorants, but at later stages also preservatives, antioxidants, emulsifiers, stabilizers, thickeners, gelling agents, sweeteners, and flavorings were included. Currently, the list of substances authorized by the European Food Safety Authority (EFSA) (referred to as "E numbers") comprises 316 natural or artificial substances including small organic molecules, metals, salts, but also more complex compounds such as plant extracts and polymers. Low overall concentrations of such compounds in natural producers due to inherent regulation mechanisms or production processes based on non-regenerative carbon sources led to an increasing interest in establishing more reliable and sustainable production platforms. In this context, microorganisms have received significant attention as alternative sources providing access to these compounds. Scientific advancements in the fields of molecular biology and genetic engineering opened the door toward using engineered microorganisms for overproduction of metabolites of their carbon metabolism such as carboxylic acids and amino acids. In addition, entire pathways, e.g., of plant origin, were functionally introduced into microorganisms, which holds the promise to get access to an even broader range of accessible products. The aim of this review article is to give a systematic overview on current efforts during construction and application of microbial cell factories for the production of food additives listed in the EU "E numbers" catalog. The review is focused on metabolic engineering strategies of industrially relevant production hosts also discussing current bottlenecks in the underlying metabolic pathways and how they can be addressed in the future.
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Affiliation(s)
- Nicolai Kallscheuer
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany
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12
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Effect of Sludge Concentration and Crude Glycerol Matrix as a Substrate on the Production of Single-Cell Oil by Oleaginous Yeast Yarrowia lipolytica SKY7. FERMENTATION-BASEL 2018. [DOI: 10.3390/fermentation4020024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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13
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Han Z, Park A, Su WW. Valorization of papaya fruit waste through low-cost fractionation and microbial conversion of both juice and seed lipids. RSC Adv 2018; 8:27963-27972. [PMID: 35542705 PMCID: PMC9084329 DOI: 10.1039/c8ra05539d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 07/27/2018] [Indexed: 11/21/2022] Open
Abstract
Seed oil from papaya waste was validated as a novel carbon substrate for Yarrowia lipolytica to produce high-value products.
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Affiliation(s)
- Zhenlin Han
- Department of Molecular Biosciences and Bioengineering
- University of Hawaii at Manoa
- Honolulu
- USA
| | - Alex Park
- Department of Molecular Biosciences and Bioengineering
- University of Hawaii at Manoa
- Honolulu
- USA
| | - Wei Wen Su
- Department of Molecular Biosciences and Bioengineering
- University of Hawaii at Manoa
- Honolulu
- USA
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Cavallo E, Charreau H, Cerrutti P, Foresti ML. Yarrowia lipolytica: a model yeast for citric acid production. FEMS Yeast Res 2017; 17:4587737. [DOI: 10.1093/femsyr/fox084] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 11/01/2017] [Indexed: 11/12/2022] Open
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Kamzolova SV, Morgunov IG. Metabolic peculiarities of the citric acid overproduction from glucose in yeasts Yarrowia lipolytica. BIORESOURCE TECHNOLOGY 2017; 243:433-440. [PMID: 28688326 DOI: 10.1016/j.biortech.2017.06.146] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 06/24/2017] [Accepted: 06/26/2017] [Indexed: 06/07/2023]
Abstract
Comparative study of 43 natural yeast strains belonging to 20 species for their capability for overproduction of citric acid (CA) from glucose under nitrogen limitation of cell growth was carried out. As a result, natural strain Yarrowia lipolytica VKM Y-2373 was selected. The effect of growth limitation by biogenic macroelements (nitrogen, phosphorus, or sulfur) on the CA production by the selected strain was studied. It was shown that yeasts Y. lipolytica grown under deficiency of nitrogen, phosphorus, or sulfur were able to excrete CA in industrially sufficient amounts (80-85g/L with the product yield (YCA) of 0.70-0.75g/g and the process selectivity of 92.5-95.3%). Based on the obtained data on activities of enzymes involved in the initial stages of glucose oxidation, the cycle of tricarboxylic acids, and the glyoxylate cycle, the conception of the mechanism responsible for the CA overproduction from glucose in Y. lipolytica was formulated.
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Affiliation(s)
- Svetlana V Kamzolova
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, Pushchino 142290, Russia
| | - Igor G Morgunov
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, Pushchino 142290, Russia.
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Janek T, Dobrowolski A, Biegalska A, Mirończuk AM. Characterization of erythrose reductase from Yarrowia lipolytica and its influence on erythritol synthesis. Microb Cell Fact 2017; 16:118. [PMID: 28693571 PMCID: PMC5504726 DOI: 10.1186/s12934-017-0733-6] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 07/05/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Erythritol is a natural sweetener that is used in the food industry. It is produced as an osmoprotectant by bacteria and yeast. Due to its chemical properties, it does not change the insulin level in the blood, and therefore it can be safely used by diabetics. Previously, it has been shown that erythrose reductase (ER), which catalyzes the final step, plays a crucial role in erythritol synthesis. ER reduces erythrose to erythritol with NAD(P)H as a cofactor. Despite many studies on erythritol synthesis by Yarrowia lipolytica, the enzymes involved in this metabolic pathway have ever been described. RESULTS The gene YALI0F18590g encoding the predicted erythrose reductase from Y. lipolytica was overexpressed, and its influence on erythritol synthesis was studied. The amino acid sequence of the Y. lipolytica ER showed a high degree of similarity to the previously described erythrose reductases from known erythritol producers, such as Candida magnoliae and Moniliella megachiliensis. Here, we found that the gene overexpression results in an enhanced titer of erythritol of 44.44 g/L (20% over the control), a yield of 0.44 g/g and productivity of 0.77 g/L/h. Moreover, on purification and characterization of the enzyme we found that it displays the highest activity at 37 °C and pH 3.0. The effects of various metal ions (Zn2+, Cu2+, Mn2+, Fe2+) on erythrose reductase were investigated. The addition of Zn2+ ions at 0.25 mM had a positive effect on the activity of erythrose reductase from Y. lipolytica, as well as on the erythritol production. CONCLUSIONS In this study we identified, overexpressed and characterized a native erythrose reductase in Y. lipolytica. Further optimizations of this strain via metabolic pathway engineering and media optimization strategies enabled 54 g/L to be produced in a shake-flask experiment. To date, this is the first reported study employing metabolic engineering of the native gene involved in the erythritol pathway to result in a high titer of the polyol. Moreover, it indicates the importance of environmental conditions for genetic targets in metabolic engineering.
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Affiliation(s)
- Tomasz Janek
- Department of Inorganic Chemistry, Faculty of Pharmacy, Wroclaw Medical University, Borowska 211a, 50-556, Wroclaw, Poland
| | - Adam Dobrowolski
- Department of Biotechnology and Food Microbiology, Wroclaw University of Environmental and Life Sciences, Chełmońskiego 37, 51-630, Wrocław, Poland
| | - Anna Biegalska
- Department of Biotechnology and Food Microbiology, Wroclaw University of Environmental and Life Sciences, Chełmońskiego 37, 51-630, Wrocław, Poland
| | - Aleksandra M Mirończuk
- Department of Biotechnology and Food Microbiology, Wroclaw University of Environmental and Life Sciences, Chełmońskiego 37, 51-630, Wrocław, Poland.
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Sabra W, Bommareddy RR, Maheshwari G, Papanikolaou S, Zeng AP. Substrates and oxygen dependent citric acid production by Yarrowia lipolytica: insights through transcriptome and fluxome analyses. Microb Cell Fact 2017; 16:78. [PMID: 28482902 PMCID: PMC5421321 DOI: 10.1186/s12934-017-0690-0] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 04/23/2017] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Unlike the well-studied backer yeast where catabolite repression represents a burden for mixed substrate fermentation, Yarrowia lipolytica, an oleaginous yeast, is recognized for its potential to produce single cell oils and citric acid from different feedstocks. These versatilities of Y. lipolytica with regards to substrate utilization make it an attractive host for biorefinery application. However, to develop a commercial process for the production of citric acid by Y. lipolytica, it is necessary to better understand the primary metabolism and its regulation, especially for growth on mixed substrate. RESULTS Controlling the dissolved oxygen concentration (pO2) in Y. lipolytica cultures enhanced citric acid production significantly in cultures grown on glucose in mono- or dual substrate fermentations, whereas with glycerol as mono-substrate no significant effect of pO2 was found on citrate production. Growth on mixed substrate with glucose and glycerol revealed a relative preference of glycerol utilization by Y. lipolytica. Under optimized conditions with pO2 control, the citric acid titer on glucose in mono- or in dual substrate cultures was 55 and 50 g/L (with productivity of 0.6 g/L*h in both cultures), respectively, compared to a maximum of 18 g/L (0.2 g/L*h) with glycerol in monosubstrate culture. Additionally, in dual substrate fermentation, glycerol limitation was found to trigger citrate consumption despite the presence of enough glucose in pO2-limited culture. The metabolic behavior of this yeast on different substrates was investigated at transcriptomic and 13C-based fluxomics levels. CONCLUSION Upregulation of most of the genes of the pentose phosphate pathway was found in cultures with highest citrate production with glucose in mono- or in dual substrate fermentation with pO2 control. The activation of the glyoxylate cycle in the oxygen limited cultures and the imbalance caused by glycerol limitation might be the reason for the re-consumption of citrate in dual substrate fermentations. This study provides interesting targets for metabolic engineering of this industrial yeast.
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Affiliation(s)
- Wael Sabra
- Institute of Bioprocess and Biosystems Engineering, Hamburg University of Technology, Denickestrasse 15, 21071 Hamburg, Germany
| | - Rajesh Reddy Bommareddy
- Institute of Bioprocess and Biosystems Engineering, Hamburg University of Technology, Denickestrasse 15, 21071 Hamburg, Germany
- Synthetic Biology Research Centre, University of Nottingham, Nottingham, NG7 2RD UK
| | - Garima Maheshwari
- Institute of Bioprocess and Biosystems Engineering, Hamburg University of Technology, Denickestrasse 15, 21071 Hamburg, Germany
| | - Seraphim Papanikolaou
- Department of Food Science and Human Nutrition, Agricultural University of Athens, 11855 Athens, Greece
| | - An-Ping Zeng
- Institute of Bioprocess and Biosystems Engineering, Hamburg University of Technology, Denickestrasse 15, 21071 Hamburg, Germany
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Papanikolaou S, Kampisopoulou E, Blanchard F, Rondags E, Gardeli C, Koutinas AA, Chevalot I, Aggelis G. Production of secondary metabolites through glycerol fermentation under carbon-excess conditions by the yeasts Yarrowia lipolytica
and Rhodosporidium toruloides. EUR J LIPID SCI TECH 2017. [DOI: 10.1002/ejlt.201600507] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Seraphim Papanikolaou
- Department of Food Science and Human Nutrition; Agricultural University of Athens; Athens Greece
- Laboratoire Réactions Génie des Procédés (LRGP-CNRS UMR 7274); Université de Lorraine; Vandoeuvre-lès-Nancy France
| | - Eleni Kampisopoulou
- Department of Food Science and Human Nutrition; Agricultural University of Athens; Athens Greece
| | - Fabrice Blanchard
- Laboratoire Réactions Génie des Procédés (LRGP-CNRS UMR 7274); Université de Lorraine; Vandoeuvre-lès-Nancy France
| | - Emmanuel Rondags
- Laboratoire Réactions Génie des Procédés (LRGP-CNRS UMR 7274); Université de Lorraine; Vandoeuvre-lès-Nancy France
| | - Chryssavgi Gardeli
- Department of Food Science and Human Nutrition; Agricultural University of Athens; Athens Greece
| | - Apostolis A. Koutinas
- Department of Food Science and Human Nutrition; Agricultural University of Athens; Athens Greece
| | - Isabelle Chevalot
- Laboratoire Réactions Génie des Procédés (LRGP-CNRS UMR 7274); Université de Lorraine; Vandoeuvre-lès-Nancy France
| | - George Aggelis
- Unit of Microbiology; Department of Biology; Division of Genetics, Cell, and Development Biology; University of Patras; Patras Greece
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Ledesma-Amaro R, Nicaud JM. Metabolic Engineering for Expanding the Substrate Range of Yarrowia lipolytica. Trends Biotechnol 2016; 34:798-809. [DOI: 10.1016/j.tibtech.2016.04.010] [Citation(s) in RCA: 138] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 04/19/2016] [Accepted: 04/21/2016] [Indexed: 11/16/2022]
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Dobrowolski A, Mituła P, Rymowicz W, Mirończuk AM. Efficient conversion of crude glycerol from various industrial wastes into single cell oil by yeast Yarrowia lipolytica. BIORESOURCE TECHNOLOGY 2016; 207:237-43. [PMID: 26890799 DOI: 10.1016/j.biortech.2016.02.039] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 02/08/2016] [Accepted: 02/09/2016] [Indexed: 05/07/2023]
Abstract
In this study, crude glycerol from various industries was used to produce lipids via wild type Yarrowia lipolytica A101. We tested samples without any prior purification from five different waste products; each contained various concentrations of glycerol (42-87%) as the sole carbon source. The best results for lipid production were obtained for medium containing glycerol from fat saponification. This reached 1.69gL(-1) (25% of total cell dry weight) with a biomass yield of 0.17gg(-1) in the flasks experiment. The batch cultivation in a bioreactor resulted in enhanced lipid production-it achieved 4.72gL(-1) with a biomass yield 0.21gg(-1). Moreover, the properly selected batch of crude glycerol provides a defined fatty acid composition. In summary, this paper shows that crude glycerol from soap production could be efficiently converted to single cell oil without any prior purification.
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Affiliation(s)
- Adam Dobrowolski
- Department of Biotechnology and Food Microbiology, Wrocław University of Environmental and Life Sciences, Chełmońskiego 37, Wrocław 51-630, Poland
| | - Paweł Mituła
- Institute of Environmental Engineering, Wrocław University of Environmental and Life Sciences, Grunwaldzki Sq 24, Wrocław 50-363, Poland
| | - Waldemar Rymowicz
- Department of Biotechnology and Food Microbiology, Wrocław University of Environmental and Life Sciences, Chełmońskiego 37, Wrocław 51-630, Poland
| | - Aleksandra M Mirończuk
- Department of Biotechnology and Food Microbiology, Wrocław University of Environmental and Life Sciences, Chełmońskiego 37, Wrocław 51-630, Poland.
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Kamzolova SV, Allayarov RK, Lunina JN, Morgunov IG. The effect of oxalic and itaconic acids on threo-Ds-isocitric acid production from rapeseed oil by Yarrowia lipolytica. BIORESOURCE TECHNOLOGY 2016; 206:128-133. [PMID: 26851896 DOI: 10.1016/j.biortech.2016.01.092] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 01/24/2016] [Accepted: 01/25/2016] [Indexed: 05/07/2023]
Abstract
The effect of oxalic and itaconic acids, the inhibitors of the isocitrate lyase, on the production of isocitric acid by the wild strain Yarrowia lipolytica VKM Y-2373 grown in the medium containing rapeseed oil was studied. In the presence of oxalic and itaconic acids, strain Y. lipolytica accumulated in the medium isocitric acid (70.0 and 82.7 g/L, respectively) and citric acid (23.0 and 18.4 g/L, respectively). In control experiment, when the inhibitors were not added to the medium, the strain accumulated isocitric and citric acids at concentrations of 62.0 and 28.0 g/L, respectively. Thus, the use of the oxalic and itaconic acids as additives to the medium is a simple and convenient method of isocitric acid production with a minimum content of citric acid.
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Affiliation(s)
- Svetlana V Kamzolova
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, Pushchino 142290, Russia.
| | - Ramil K Allayarov
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, Pushchino 142290, Russia
| | - Julia N Lunina
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, Pushchino 142290, Russia
| | - Igor G Morgunov
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, Pushchino 142290, Russia
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Mirończuk AM, Rzechonek DA, Biegalska A, Rakicka M, Dobrowolski A. A novel strain of Yarrowia lipolytica as a platform for value-added product synthesis from glycerol. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:180. [PMID: 27594914 PMCID: PMC5009880 DOI: 10.1186/s13068-016-0593-z] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 08/19/2016] [Indexed: 05/02/2023]
Abstract
BACKGROUND Increasing interest of non-conventional yeasts has been observed for many years due to their biochemical characteristics and potential applications. Well-studied, oleaginous yeast Y. lipolytica is an attractive host for converting a low-cost glycerol, into value-added products such as erythritol (sweetener) or citric acid. Glycerol is an important renewable feedstock and is the main co-product of biodiesel production, which is nowadays applied on a large commercial scale. To this end, we engineered the yeast Y. lipolytica to increase the productivity of this strain. RESULTS In this light, we enhanced glycerol assimilation by over-expression of the YALI0F00484g gene encoding glycerol kinase (GK) and gene YALI0B02948g encoding glycerol-3-P dehydrogenase (GDH). The modified strains have been tested for glycerol consumption rate and erythritol and citric acid synthesis under various conditions. Here, we show that the overexpression of GK and GDH, increased glycerol consumption resulting in rapid erythritol and citric acid synthesis. Next, we combined the two genes in the tandem gene construct for the simultaneous co-expression of GK and GDH, which further increased the desired product synthesis. The glycerol consumption was explored in a 5-L bioreactor and the engineered strains were able to utilize 150 g/L glycerol within 44-48 hours. The erythritol productivity for GK overexpression and co-expression of GK and DGH was 24 and 35 %, respectively, over the control strain. Moreover, we established conditions for the production of citric acid at pH 3.0, the engineered strains increased citric acid production 14-fold over the control. CONCLUSION This work demonstrates the excellent capacity of the engineered strains as a starting platform for further modification for broad-range value-added product biosynthesis from glycerol. This study presents the highest reported titer citric acid at low pH to date. The process parameters such as productivity and yield of erythritol and citric acid were significantly elevated, what is valuable for industrial applications.
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Affiliation(s)
- Aleksandra M. Mirończuk
- Department of Biotechnology and Food Microbiology, Wroclaw University of Environmental and Life Sciences, Chełmońskiego 37, 51-630 Wrocław, Poland
| | - Dorota A. Rzechonek
- Department of Biotechnology and Food Microbiology, Wroclaw University of Environmental and Life Sciences, Chełmońskiego 37, 51-630 Wrocław, Poland
| | - Anna Biegalska
- Department of Biotechnology and Food Microbiology, Wroclaw University of Environmental and Life Sciences, Chełmońskiego 37, 51-630 Wrocław, Poland
| | - Magdalena Rakicka
- Department of Biotechnology and Food Microbiology, Wroclaw University of Environmental and Life Sciences, Chełmońskiego 37, 51-630 Wrocław, Poland
| | - Adam Dobrowolski
- Department of Biotechnology and Food Microbiology, Wroclaw University of Environmental and Life Sciences, Chełmońskiego 37, 51-630 Wrocław, Poland
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Mirończuk AM, Rakicka M, Biegalska A, Rymowicz W, Dobrowolski A. A two-stage fermentation process of erythritol production by yeast Y. lipolytica from molasses and glycerol. BIORESOURCE TECHNOLOGY 2015; 198:445-55. [PMID: 26409857 DOI: 10.1016/j.biortech.2015.09.008] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2015] [Revised: 09/03/2015] [Accepted: 09/04/2015] [Indexed: 05/07/2023]
Abstract
In this study, a two-stage fermentation process of erythritol production based on molasses and glycerol was investigated. During the first stage, the biomass of Yarrowia lipolytica was grown on medium containing sucrose as the sole carbon source. In the second stage, production of erythritol was initiated by glycerol addition. To use molasses as a substrate for erythritol synthesis, sucrose utilization was established by expressing the Saccharomyces cerevisiae SUC2 gene. In this study, cultivation of yeast Y. lipolytica could produce 52-114 g/L of erythritol. The productivity was 0.58-1.04 g/L/h, and yield was 0.26-0.57 g/g; the final biomasses yield ranged 17-41 g/L. This is the first report describing erythritol production via industrial raw molasses and glycerol by Y. lipolytica. This work uses genetically modified strains of Y. lipolytica as tool for the direct conversion of affordable raw industrial molasses and glycerol into the value-added erythritol product.
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Affiliation(s)
- Aleksandra M Mirończuk
- Department of Biotechnology and Food Microbiology, Wrocław University of Environmental and Life Sciences, Chełmońskiego 37, Wrocław 51-630, Poland
| | - Magdalena Rakicka
- Department of Biotechnology and Food Microbiology, Wrocław University of Environmental and Life Sciences, Chełmońskiego 37, Wrocław 51-630, Poland
| | - Anna Biegalska
- Department of Biotechnology and Food Microbiology, Wrocław University of Environmental and Life Sciences, Chełmońskiego 37, Wrocław 51-630, Poland
| | - Waldemar Rymowicz
- Department of Biotechnology and Food Microbiology, Wrocław University of Environmental and Life Sciences, Chełmońskiego 37, Wrocław 51-630, Poland
| | - Adam Dobrowolski
- Department of Biotechnology and Food Microbiology, Wrocław University of Environmental and Life Sciences, Chełmońskiego 37, Wrocław 51-630, Poland.
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