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Engineering and fermenter production of fungi GLA in Pichia pastoris GS115 using oil waste. Arch Microbiol 2022; 204:635. [PMID: 36127512 DOI: 10.1007/s00203-022-03182-4] [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: 12/23/2021] [Revised: 06/02/2022] [Accepted: 08/09/2022] [Indexed: 11/02/2022]
Abstract
γ-Linolenic acid (GLA) is an essential n-6 polyunsaturated fatty acid (PUFA) that has received considerable attention in human and animal feed. GLA is used in many nutritional and medicinal applications, such as the treatment of cancer, inflammatory disorders, and diabetes. Currently, plant seed is the primary dietary source of GLA that is not enough to utilize on an industrial scale. To generate a sustainable novel source of GLA, the gene of delta-6 desaturase, one of the essential enzymes in the GLA production pathway, was isolated from Mucor rouxii DSM1194 and expressed in P. pastoris GS115 by pPICZC vector. The recombinant yeast expressed the GLA up to 19.2% (72 mg/g) of total fatty acids. GLA production of recombinant yeast was studied in a fermenter by oil waste for 5 days, and results detected 6.3 g/l lipid, and 103 mg/g GLA was produced in 72 h. The present study may provide an opportunity to develop an alternative host for manufacturing GLA on an industrial scale.
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Rul F, Béra-Maillet C, Champomier-Vergès MC, El-Mecherfi KE, Foligné B, Michalski MC, Milenkovic D, Savary-Auzeloux I. Underlying evidence for the health benefits of fermented foods in humans. Food Funct 2022; 13:4804-4824. [PMID: 35384948 DOI: 10.1039/d1fo03989j] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Fermented foods (FFs) have been a part of our diets for millennia and comprise highly diverse products obtained from plants and animals all over the world. Historically, fermentation has been used to preserve food and render certain raw materials edible. As our food systems evolve towards more sustainability, the health benefits of FFs have been increasingly touted. Fermentation generates new/transformed bioactive compounds that may occur in association with probiotic bacteria. The result can be specific, advantageous functional properties. Yet, when considering the body of human studies on the topic, whether observational or experimental, it is rare to come across findings supporting the above assertion. Certainly, results are lacking to confirm the widespread idea that FFs have general health benefits. There are some exceptions, such as in the case of lactose degradation via fermentation in individuals who are lactose intolerant; the impact of select fermented dairy products on insulin sensitivity; or the benefits of alcohol consumption. However, in other situations, the results fail to categorically indicate whether FFs have neutral, beneficial, or detrimental effects on human health. This review tackles this apparent incongruity by showing why it is complex to test the health effects of FFs and what can be done to improve knowledge in this field.
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Affiliation(s)
- F Rul
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - C Béra-Maillet
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - M C Champomier-Vergès
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - K E El-Mecherfi
- INRAE, UR1268 Biopolymères Interactions Assemblages, 44300 Nantes, France
| | - B Foligné
- Univ. Lille, Inserm, CHU Lille, U1286 - INFINITE - Institute for Translational Research in Inflammation, F-59000 Lille, France
| | - M C Michalski
- Univ-Lyon, CarMeN Laboratory, Inserm, U1060, INRAE, UMR1397, Université Claude Bernard Lyon 1, 69310 Pierre Bénite, France
| | - D Milenkovic
- Université Clermont Auvergne, INRAE, UMR1019, Unité Nutrition Humaine, Clermont-Ferrand, France. .,Department of Nutrition, University of California, Davis, Davis, CA, USA
| | - I Savary-Auzeloux
- Université Clermont Auvergne, INRAE, UMR1019, Unité Nutrition Humaine, Clermont-Ferrand, France.
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Fazili ABA, Shah AM, Zan X, Naz T, Nosheen S, Nazir Y, Ullah S, Zhang H, Song Y. Mucor circinelloides: a model organism for oleaginous fungi and its potential applications in bioactive lipid production. Microb Cell Fact 2022; 21:29. [PMID: 35227264 PMCID: PMC8883733 DOI: 10.1186/s12934-022-01758-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 02/10/2022] [Indexed: 11/10/2022] Open
Abstract
Microbial oils have gained massive attention because of their significant role in industrial applications. Currently plants and animals are the chief sources of medically and nutritionally important fatty acids. However, the ever-increasing global demand for polyunsaturated fatty acids (PUFAs) cannot be met by the existing sources. Therefore microbes, especially fungi, represent an important alternative source of microbial oils being investigated. Mucor circinelloides—an oleaginous filamentous fungus, came to the forefront because of its high efficiency in synthesizing and accumulating lipids, like γ-linolenic acid (GLA) in high quantity. Recently, mycelium of M. circinelloides has acquired substantial attraction towards it as it has been suggested as a convenient raw material source for the generation of biodiesel via lipid transformation. Although M. circinelloides accumulates lipids naturally, metabolic engineering is found to be important for substantial increase in their yields. Both modifications of existing pathways and re-formation of biosynthetic pathways in M. circinelloides have shown the potential to improve lipid levels. In this review, recent advances in various important metabolic aspects of M. circinelloides have been discussed. Furthermore, the potential applications of M. circinelloides in the fields of antioxidants, nutraceuticals, bioremediation, ethanol production, and carotenoids like beta carotene and astaxanthin having significant nutritional value are also deliberated.
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Cui J, Chen H, Tang X, Zhao J, Zhang H, Chen YQ, Chen W. Δ6 fatty acid desaturases in polyunsaturated fatty acid biosynthesis: insights into the evolution, function with substrate specificities and biotechnological use. Appl Microbiol Biotechnol 2020; 104:9947-9963. [PMID: 33094384 DOI: 10.1007/s00253-020-10958-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 10/05/2020] [Accepted: 10/12/2020] [Indexed: 12/23/2022]
Abstract
Δ6 fatty acid desaturases (FADS6) have different substrate specificities that impact the ratio of omega-6/omega-3 polyunsaturated fatty acids, which are involved in regulating multiple signalling pathways associated with various diseases. For decades, FADS6 with different substrate specificities have been characterized and the functions of these crucial enzymes have been investigated, while it remains enigmatic that the substrate specificities of FADS6 from various species have a huge difference. This review summarizes the substrate specificities of FADS6 in different species and reveals the underlying relationship. Further evaluation of biochemical properties has revealed that the FADS6 prefer linoleic acid that is more hydrophilic and stable. Domain-swapping and site-directed mutagenesis have been employed to delineate the regions and sites that affect the substrate specificities of FADS6. These analyses improve our understanding of the functions of FADS6 and offer information for the discovery of novel biological resources. KEY POINTS: • Outline of the excavation and identification of Δ6 fatty acid desaturases. • Overview of methods used to determine the pivotal resides of desaturases. • Application of substrate properties to generate specific fatty acids.
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Affiliation(s)
- Jie Cui
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China.,School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China
| | - Haiqin Chen
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China. .,School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China.
| | - Xin Tang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China.,School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China
| | - Jianxin Zhao
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China.,School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China
| | - Hao Zhang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China.,School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China.,National Engineering Research Center for Functional Food, Jiangnan University, Wuxi, 214122, People's Republic of China.,Wuxi Translational Medicine Research Center and Jiangsu Translational Medicine Research Institute Wuxi Branch, Wuxi, 214122, People's Republic of China
| | - Yong Q Chen
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China.,School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China.,Department of Cancer Biology, Wake Forest School of Medicine, 5, Winston-Salem, NC, 27127, USA
| | - Wei Chen
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China.,School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China.,National Engineering Research Center for Functional Food, Jiangnan University, Wuxi, 214122, People's Republic of China.,Beijing Innovation Center of Food Nutrition and Human Health, Beijing Technology and Business University (BTBU), Beijing, 100048, People's Republic of China
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Zhang Y, Luan X, Zhang H, Garre V, Song Y, Ratledge C. Improved γ-linolenic acid production in Mucor circinelloides by homologous overexpressing of delta-12 and delta-6 desaturases. Microb Cell Fact 2017. [PMID: 28637506 PMCID: PMC5480167 DOI: 10.1186/s12934-017-0723-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Background γ-Linolenic acid (GLA) is important because of its nutritional value and medicinal applications. Although the biosynthetic pathways of some plant and microbial GLA have been deciphered, current understanding of the correlation between desaturases and GLA synthesis in oleaginous fungi is incomplete. In previous work, we found that a large amount of oleic acid (OA) had not been converted to linoleic acid (LA) or GLA in Mucor circinelloides CBS 277.49, which may be due to inadequate activities of the delta-12 or delta-6 desaturases, and thus leading to the accumulation of OA and LA. Thus, it is necessary to explore the main contributing factor during the process of GLA biosynthesis in M. circinelloides. Results To enhance GLA production in M. circinelloides, homologous overexpression of delta-12 and two delta-6 desaturases (named delta-6-1 and delta-6-2, respectively) were analyzed. When delta-6 desaturase were overexpressed in M. circinelloides, up to 43% GLA was produced in the total fatty acids, and the yield of GLA reached 180 mg/l, which were, respectively, 38 and 33% higher than the control strain. Conclusion These findings revealed that delta-6 desaturase (especially for delta-6-1 desaturase) plays an important role in GLA synthesis by M. circinelloides. The strain overexpressing delta-6-1 desaturase may have potential application in microbial GLA production. Electronic supplementary material The online version of this article (doi:10.1186/s12934-017-0723-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yao Zhang
- Colin Ratledge Center for Microbial Lipids, School of Agricultural Engineering and Food Science, Key Laboratory of Shandong Provincial Universities for Technologies in Functional Agricultural Products, Shandong University of Technology, 266 Xincun West Road, Zibo, Shandong, 255000, People's Republic of China
| | - Xiao Luan
- School of Food Science and Technolgy, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, People's Republic of China
| | - Huaiyuan Zhang
- Colin Ratledge Center for Microbial Lipids, School of Agricultural Engineering and Food Science, Key Laboratory of Shandong Provincial Universities for Technologies in Functional Agricultural Products, Shandong University of Technology, 266 Xincun West Road, Zibo, Shandong, 255000, People's Republic of China
| | - Victoriano Garre
- Departamento de Genéticay Microbiologia (Unidad ASOCIADA al IQFR-CSIC), Facultad de Biologi, Universidad de Murcia, 30071, Murcia, Spain
| | - Yuanda Song
- Colin Ratledge Center for Microbial Lipids, School of Agricultural Engineering and Food Science, Key Laboratory of Shandong Provincial Universities for Technologies in Functional Agricultural Products, Shandong University of Technology, 266 Xincun West Road, Zibo, Shandong, 255000, People's Republic of China. .,School of Food Science and Technolgy, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, People's Republic of China.
| | - Colin Ratledge
- Department of Biological Sciences, University of Hull, Hull, UK
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