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Díaz-Navarrete P, Sáez-Arteaga A, Marileo L, Alors D, Correa-Galeote D, Dantagnan P. Enhancing Selenium Accumulation in Rhodotorula mucilaginosa Strain 6S Using a Proteomic Approach for Aquafeed Development. Biomolecules 2024; 14:629. [PMID: 38927033 PMCID: PMC11201420 DOI: 10.3390/biom14060629] [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: 05/02/2024] [Revised: 05/23/2024] [Accepted: 05/23/2024] [Indexed: 06/28/2024] Open
Abstract
It is known that selenium (Se) is an essential trace element, important for the growth and other biological functions of fish. One of its most important functions is to contribute to the preservation of certain biological components, such as DNA, proteins, and lipids, providing protection against free radicals resulting from normal metabolism. The objective of this study was to evaluate and optimize selenium accumulation in the native yeast Rhodotorula mucilaginosa 6S. Sodium selenite was evaluated at different concentrations (5-10-15-20-30-40 mg/L). Similarly, the effects of different concentrations of nitrogen sources and pH on cell growth and selenium accumulation in the yeast were analyzed. Subsequently, the best cultivation conditions were scaled up to a 2 L reactor with constant aeration, and the proteome of the yeast cultured with and without sodium selenite was evaluated. The optimal conditions for biomass generation and selenium accumulation were found with ammonium chloride and pH 5.5. Incorporating sodium selenite (30 mg/L) during the exponential phase in the bioreactor after 72 h of cultivation resulted in 10 g/L of biomass, with 0.25 mg total Se/g biomass, composed of 25% proteins, 15% lipids, and 0.850 mg total carotenoids/g biomass. The analysis of the proteomes associated with yeast cultivation with and without selenium revealed a total of 1871 proteins. The results obtained showed that the dynamic changes in the proteome, in response to selenium in the experimental medium, are directly related to catalytic activity and oxidoreductase activity in the yeast. R. mucilaginosa 6S could be an alternative for the generation of selenium-rich biomass with a composition of other nutritional compounds also of interest in aquaculture, such as proteins, lipids, and pigments.
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Affiliation(s)
- Paola Díaz-Navarrete
- Departamento de Ciencias Veterinarias y Salud Pública, Facultad de Recursos Naturales, Universidad Católica de Temuco, Temuco 4780000, Chile
- Núcleo de Investigación en Producción Alimentaria, Departamento de Ciencias Agropecuarias y Acuícolas, Facultad de Recursos Naturales, Universidad Católica de Temuco, Temuco 4780000, Chile;
| | - Alberto Sáez-Arteaga
- Centro de Investigación Innovación y Creación (CIIC-UCT), Universidad Católica de Temuco, Temuco 4780000, Chile;
- Departamento de Ciencias Agropecuarias y Acuícolas, Facultad de Recursos Naturales, Universidad Católica de Temuco, Temuco 4780000, Chile
| | - Luis Marileo
- Escuela de Medicina Veterinaria, Facultad de Recursos Naturales y Medicina Veterinaria, Universidad Santo Tomás, Temuco 4780000, Chile;
| | - David Alors
- Departamento de Ciencias Biológicas y Químicas, Facultad de Recursos Naturales, Universidad Católica de Temuco, Temuco 4780000, Chile;
| | - David Correa-Galeote
- Departamento de Microbiología, Facultad de Farmacia, Universidad de Granada, 18012 Granada, Spain;
| | - Patricio Dantagnan
- Núcleo de Investigación en Producción Alimentaria, Departamento de Ciencias Agropecuarias y Acuícolas, Facultad de Recursos Naturales, Universidad Católica de Temuco, Temuco 4780000, Chile;
- Departamento de Ciencias Agropecuarias y Acuícolas, Facultad de Recursos Naturales, Universidad Católica de Temuco, Temuco 4780000, Chile
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Yu Y, Zhou Y, Wang K, Sun T, Lin L, Ledesma-Amaro R, Ji XJ. Metabolic and Process Engineering for Producing the Peach-Like Aroma Compound γ-Decalactone in Yarrowia lipolytica. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:110-120. [PMID: 36579964 DOI: 10.1021/acs.jafc.2c07356] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Due to its strong and unique peach-like aroma, γ-decalactone is widely used in dairy products and other foods or beverages. The oleaginous yeast Yarrowia lipolytica, which is generally regarded as safe, has shown great potential in the production of this flavor compound. Recently, the development of metabolic and process engineering has enabled the application of Y. lipolytica for the production of γ-decalactone. This Review summarizes the relevant biosynthesis and degradation pathways of Y. lipolytica, after which the related metabolic engineering strategies to increase the accumulation of γ-decalactone are summarized. In addition, the factors affecting γ-decalactone accumulation in Y. lipolytica are introduced, and corresponding process optimization strategies are discussed. Finally, the current research needs are analyzed to search for remaining challenges and future directions in this field.
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Affiliation(s)
- Yizi Yu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30 South Puzhu Road, Nanjing 211816, People's Republic of China
| | - Yufan Zhou
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30 South Puzhu Road, Nanjing 211816, People's Republic of China
| | - Kaifeng Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30 South Puzhu Road, Nanjing 211816, People's Republic of China
| | - Tao Sun
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30 South Puzhu Road, Nanjing 211816, People's Republic of China
| | - Lu Lin
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30 South Puzhu Road, Nanjing 211816, People's Republic of China
| | - Rodrigo Ledesma-Amaro
- Department of Bioengineering and Imperial College Centre for Synthetic Biology, Imperial College London, London SW7 2AZ, United Kingdom
| | - Xiao-Jun Ji
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30 South Puzhu Road, Nanjing 211816, People's Republic of China
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Tang L, Yu X, Zhang L, Zhang L, Chen L, Zou S, Liang Y, Yu J, Dong H. Mitochondrial FgEch1 is responsible for conidiation and full virulence in Fusarium graminearum. Curr Genet 2019; 66:361-371. [PMID: 31463774 DOI: 10.1007/s00294-019-01028-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 08/04/2019] [Accepted: 08/19/2019] [Indexed: 11/26/2022]
Abstract
Enoyl-CoA hydratase (Ech) is an important and well-recognized enzyme that functions in the degradation of fatty acids by β-oxidation. However, its functions in plant pathogenic fungi are not well known. We characterized an Ech1 orthologue, FgEch1, in Fusarium graminearum. The FgEch1 deletion mutant was defective in the utilization of short-chain fatty acids and conidiation, but not in hyphal growth on glucose-rich media or in perithecium formation. The FgEch1 deletion mutant showed reduced deoxynivalenol (DON) production and virulence in plants. Deletion of FgEch1 also led to increased production of lipid droplets and autophagy. FgEch1, which was localized in the mitochondrion, required the MTS domain for mitochondrial localization and function in F. graminearum. Taken together, these data indicate that mitochondrial FgEch1 is important for conidiation, DON production, and plant infection.
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Affiliation(s)
- Lin Tang
- Shandong Province Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University, Tai'an, 271018, China
| | - Xiaoyang Yu
- Shandong Province Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University, Tai'an, 271018, China
| | - Li Zhang
- Shandong Province Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University, Tai'an, 271018, China
| | - Liyuan Zhang
- Shandong Province Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University, Tai'an, 271018, China
| | - Lei Chen
- Shandong Province Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University, Tai'an, 271018, China
| | - Shenshen Zou
- Shandong Province Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University, Tai'an, 271018, China.
| | - Yuancun Liang
- Shandong Province Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University, Tai'an, 271018, China.
| | - Jinfeng Yu
- Shandong Province Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University, Tai'an, 271018, China
| | - Hansong Dong
- Shandong Province Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University, Tai'an, 271018, China
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Aroma compounds production by solid state fermentation, importance of in situ gas-phase recovery systems. Appl Microbiol Biotechnol 2018; 102:7239-7255. [PMID: 29938320 DOI: 10.1007/s00253-018-9157-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Revised: 06/04/2018] [Accepted: 06/04/2018] [Indexed: 10/28/2022]
Abstract
Flavour and fragrance compounds are extremely important for food, feed, cosmetic and pharmaceutical industries. In the last decades, due to the consumer's increased trend towards natural products, a great interest in natural aroma compounds has arisen to the detriment of chemically synthesised ones. Recently, solid state fermentation (SSF) has been applied in the production of many metabolites. Aroma compounds can be produced by SSF with a higher yield compared to submerged fermentation (SmF). In SSF processes, aroma compounds can be produced in the solid matrix or in the headspace, but they can be lost or stripped when aeration is required. This review focuses on the production of aroma compounds by SSF processes with a special highlight on in situ systems to recover the volatiles released in the gaseous phase and stripped due to aeration. Following a brief presentation of specificities of SSF processes concerning the choice of microorganisms and the solid matrix used for the production of aroma compounds, bioreactor aspects, factors affecting production of aroma compounds and in situ gas phase aroma recovery systems in aerated SSF bioreactors are discussed.
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Li L, Ma Y. The effect of soluble saccharides on the activity of key enzymes linked to methyl ketone synthesis inLactococcus lactis. CYTA - JOURNAL OF FOOD 2018. [DOI: 10.1080/19476337.2017.1401666] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Liang Li
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang, China
| | - Ying Ma
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China
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Werner N, Zibek S. Biotechnological production of bio-based long-chain dicarboxylic acids with oleogenious yeasts. World J Microbiol Biotechnol 2017; 33:194. [PMID: 28983758 DOI: 10.1007/s11274-017-2360-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 09/26/2017] [Indexed: 01/15/2023]
Abstract
Long-chain α,ω-dicarboxylic acids (DCAs) are versatile chemical intermediates of industrial importance used as building blocks for the production of polymers, lubricants, or adhesives. The majority of industrial long-chain DCAs is produced from petro-chemical resources. An alternative is their biotechnological production from renewable materials like plant oil fatty acids by microbial fermentation using oleogenious yeasts. Oleogenious yeasts are natural long-chain DCA producers, which have to be genetically engineered for high-yield DCA production. Although, some commercialized fermentation processes using engineered yeasts are reported, bio-based long-chain DCAs are still far from being a mass product. Further progress in bioprocess engineering and rational strain design is necessary to advance their further commercialization. The present article reviews the basic strategies, as well as novel approaches in the strain design of oleogenious yeasts, such as the combination of traditional metabolic engineering with system biology strategies for high-yield long-chain DCA production. Therefore a detailed overview of the involved metabolic processes for the biochemical long-chain DCA synthesis is given.
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Affiliation(s)
- Nicole Werner
- Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB, Stuttgart, Germany
| | - Susanne Zibek
- Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB, Stuttgart, Germany.
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Zhong Z, Norvienyeku J, Yu J, Chen M, Cai R, Hong Y, Chen L, Zhang D, Wang B, Zhou J, Lu G, Chen X, Wang Z. Two different subcellular-localized Acetoacetyl-CoA acetyltransferases differentiate diverse functions in Magnaporthe oryzae. Fungal Genet Biol 2015; 83:58-67. [DOI: 10.1016/j.fgb.2015.08.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Revised: 08/23/2015] [Accepted: 08/24/2015] [Indexed: 10/23/2022]
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Gabriel F, Accoceberry I, Bessoule JJ, Salin B, Lucas-Guérin M, Manon S, Dementhon K, Noël T. A Fox2-dependent fatty acid ß-oxidation pathway coexists both in peroxisomes and mitochondria of the ascomycete yeast Candida lusitaniae. PLoS One 2014; 9:e114531. [PMID: 25486052 PMCID: PMC4259357 DOI: 10.1371/journal.pone.0114531] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 11/10/2014] [Indexed: 01/24/2023] Open
Abstract
It is generally admitted that the ascomycete yeasts of the subphylum Saccharomycotina possess a single fatty acid ß-oxidation pathway located exclusively in peroxisomes, and that they lost mitochondrial ß-oxidation early during evolution. In this work, we showed that mutants of the opportunistic pathogenic yeast Candida lusitaniae which lack the multifunctional enzyme Fox2p, a key enzyme of the ß-oxidation pathway, were still able to grow on fatty acids as the sole carbon source, suggesting that C. lusitaniae harbored an alternative pathway for fatty acid catabolism. By assaying 14Cα-palmitoyl-CoA consumption, we demonstrated that fatty acid catabolism takes place in both peroxisomal and mitochondrial subcellular fractions. We then observed that a fox2Δ null mutant was unable to catabolize fatty acids in the mitochondrial fraction, thus indicating that the mitochondrial pathway was Fox2p-dependent. This finding was confirmed by the immunodetection of Fox2p in protein extracts obtained from purified peroxisomal and mitochondrial fractions. Finally, immunoelectron microscopy provided evidence that Fox2p was localized in both peroxisomes and mitochondria. This work constitutes the first demonstration of the existence of a Fox2p-dependent mitochondrial β-oxidation pathway in an ascomycetous yeast, C. lusitaniae. It also points to the existence of an alternative fatty acid catabolism pathway, probably located in peroxisomes, and functioning in a Fox2p-independent manner.
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Affiliation(s)
- Frédéric Gabriel
- Univ. Bordeaux, Microbiologie Fondamentale et Pathogénicité, UMR 5234, F-33000 Bordeaux, France
- CNRS, Microbiologie Fondamentale et Pathogénicité, UMR 5234, F-33000 Bordeaux, France
| | - Isabelle Accoceberry
- Univ. Bordeaux, Microbiologie Fondamentale et Pathogénicité, UMR 5234, F-33000 Bordeaux, France
- CNRS, Microbiologie Fondamentale et Pathogénicité, UMR 5234, F-33000 Bordeaux, France
| | - Jean-Jacques Bessoule
- Univ. Bordeaux, Laboratoire de Biogenèse Membranaire, UMR 5200, F-33000 Bordeaux, France
- CNRS, Laboratoire de Biogenèse Membranaire, UMR 5200, F-33000 Bordeaux, France
| | - Bénédicte Salin
- Univ. Bordeaux, Institut de Biochimie et Génétique Cellulaires, UMR 5095, F-33000 Bordeaux, France
- CNRS, Institut de Biochimie et Génétique Cellulaires, UMR 5095, F-33000 Bordeaux, France
| | - Marine Lucas-Guérin
- Univ. Bordeaux, Microbiologie Fondamentale et Pathogénicité, UMR 5234, F-33000 Bordeaux, France
- CNRS, Microbiologie Fondamentale et Pathogénicité, UMR 5234, F-33000 Bordeaux, France
| | - Stephen Manon
- Univ. Bordeaux, Institut de Biochimie et Génétique Cellulaires, UMR 5095, F-33000 Bordeaux, France
- CNRS, Institut de Biochimie et Génétique Cellulaires, UMR 5095, F-33000 Bordeaux, France
| | - Karine Dementhon
- Univ. Bordeaux, Microbiologie Fondamentale et Pathogénicité, UMR 5234, F-33000 Bordeaux, France
- CNRS, Microbiologie Fondamentale et Pathogénicité, UMR 5234, F-33000 Bordeaux, France
| | - Thierry Noël
- Univ. Bordeaux, Microbiologie Fondamentale et Pathogénicité, UMR 5234, F-33000 Bordeaux, France
- CNRS, Microbiologie Fondamentale et Pathogénicité, UMR 5234, F-33000 Bordeaux, France
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Li L, Ma Y. Effects of metal ions on growth, β-oxidation system, and thioesterase activity of Lactococcus lactis. J Dairy Sci 2014; 97:5975-82. [DOI: 10.3168/jds.2014-8047] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Accepted: 05/20/2014] [Indexed: 11/19/2022]
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11
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Li L, Ma Y. Effect of fatty acids on the β-oxidation system and thioesterase of Lactococcus lactis subspecies lactis. J Dairy Sci 2013; 96:2003-2010. [DOI: 10.3168/jds.2012-5996] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Accepted: 12/27/2012] [Indexed: 11/19/2022]
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Patkar RN, Ramos-Pamplona M, Gupta AP, Fan Y, Naqvi NI. Mitochondrial β-oxidation regulates organellar integrity and is necessary for conidial germination and invasive growth inMagnaporthe oryzae. Mol Microbiol 2012; 86:1345-63. [DOI: 10.1111/mmi.12060] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/01/2012] [Indexed: 11/28/2022]
Affiliation(s)
- Rajesh N. Patkar
- Fungal Patho-Biology Group; Temasek Life Sciences Laboratory; Singapore; 117604
| | | | - Archna P. Gupta
- School of Biological Sciences; Nanyang Technological University; 60 Nanyang Drive; Singapore; 637551
| | - Yang Fan
- Fungal Patho-Biology Group; Temasek Life Sciences Laboratory; Singapore; 117604
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Jarmuszkiewicz W, Woyda-Ploszczyca A, Antos-Krzeminska N, Sluse FE. Mitochondrial uncoupling proteins in unicellular eukaryotes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2009; 1797:792-9. [PMID: 20026010 DOI: 10.1016/j.bbabio.2009.12.005] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2009] [Revised: 11/27/2009] [Accepted: 12/03/2009] [Indexed: 11/29/2022]
Abstract
Uncoupling proteins (UCPs) are members of the mitochondrial anion carrier protein family that are present in the mitochondrial inner membrane and mediate free fatty acid (FFA)-activated, purine nucleotide (PN)-inhibited proton conductance. Since 1999, the presence of UCPs has been demonstrated in some non-photosynthesising unicellular eukaryotes, including amoeboid and parasite protists, as well as in non-fermentative yeast and filamentous fungi. In the mitochondria of these organisms, UCP activity is revealed upon FFA-induced, PN-inhibited stimulation of resting respiration and a decrease in membrane potential, which are accompanied by a decrease in membranous ubiquinone (Q) reduction level. UCPs in unicellular eukaryotes are able to divert energy from oxidative phosphorylation and thus compete for a proton electrochemical gradient with ATP synthase. Our recent work indicates that membranous Q is a metabolic sensor that might utilise its redox state to release the PN inhibition of UCP-mediated mitochondrial uncoupling under conditions of phosphorylation and resting respiration. The action of reduced Q (QH2) could allow higher or complete activation of UCP. As this regulatory feature was demonstrated for microorganism UCPs (A. castellanii UCP), plant and mammalian UCP1 analogues, and UCP1 in brown adipose tissue, the process could involve all UCPs. Here, we discuss the functional connection and physiological role of UCP and alternative oxidase, two main energy-dissipating systems in the plant-type mitochondrial respiratory chain of unicellular eukaryotes, including the control of cellular energy balance as well as preventive action against the production of reactive oxygen species.
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Affiliation(s)
- Wieslawa Jarmuszkiewicz
- Laboratory of Bioenergetics, Faculty of Biology, Adam Mickiewicz University, Umultowska 89, 61-614 Poznan, Poland.
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Luévano-Martínez LA, Moyano E, de Lacoba MG, Rial E, Uribe-Carvajal S. Identification of the mitochondrial carrier that provides Yarrowia lipolytica with a fatty acid-induced and nucleotide-sensitive uncoupling protein-like activity. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2009; 1797:81-8. [PMID: 19766093 DOI: 10.1016/j.bbabio.2009.09.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2009] [Revised: 09/02/2009] [Accepted: 09/08/2009] [Indexed: 11/30/2022]
Abstract
Uncoupling proteins (UCPs) are mitochondrial carriers distributed throughout the eukaryotic kingdoms. While genes coding for UCPs have been identified in plants and animals, evidences for the presence of UCPs in fungi and protozoa are only functional. Here, it is reported that in the yeast Yarrowia lipolytica there is a fatty acid-promoted and GDP-sensitive uncoupling activity indicating the presence of a UCP. The uncoupling activity is higher in the stationary phase than in the mid-log growth phase. The in silico search on the Y. lipolytica genome led to the selection of two genes with the highest homology to the UCP family, XM_503525 and XM_500457. By phylogenetic analysis, XP_503525 was predicted to be an oxaloacetate carrier while XP_500457 would be a dicarboxylate carrier. Each of these two genes was cloned and heterologously expressed in Saccharomyces cerevisiae and the resulting phenotype was analyzed. The transport activity of the two gene products confirmed the phylogenetic predictions. In addition, only mitochondria isolated from yeasts expressing XP_503525 showed bioenergetic properties characteristic of a UCP: the proton conductance was increased by linoleic acid and inhibited by GDP. It is concluded that the XM_503525 gene from Y. lipolytica encodes for an oxaloacetate carrier although, remarkably, it also displays an uncoupling activity stimulated by fatty acids and inhibited by nucleotides.
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Affiliation(s)
- Luis A Luévano-Martínez
- Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
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García EE, Belin JM, Waché Y. Use of a Doehlert factorial design to investigate the effects of pH and aeration on the accumulation of lactones by Yarrowia lipolytica. J Appl Microbiol 2007; 103:1508-15. [DOI: 10.1111/j.1365-2672.2007.03379.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Feron G, Mauvais G, Lherminier J, Michel J, Wang XD, Viel C, Cachon R. Metabolism of fatty acid in yeast: addition of reducing agents to the reaction medium influences β-oxidation activities, γ-decalactone production, and cell ultrastructure inSporidiobolus ruineniicultivated on ricinoleic acid methyl ester. Can J Microbiol 2007; 53:738-49. [PMID: 17668034 DOI: 10.1139/w07-028] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The sensitivity of Sporidiobolus ruinenii yeast to the use of reducing agents, reflected in changes in the oxidoreduction potential at pH 7 (Eh7) environment, ricinoleic acid methyl ester catabolism, γ-decalactone synthesis, cofactor level, β-oxidation activity, and ultrastructure of the cell, was studied. Three environmental conditions (corresponding to oxidative, neutral, and reducing conditions) were fixed with the use of air or air and reducing agents (hydrogen and dithiothreitol). Lowering Eh7to neutral conditions (Eh7 = +30 mV and +2.5 mV) favoured the production of lactone more than the more oxidative condition (Eh7 = +350 mV). In contrast, when a reducing condition was used (Eh7= –130 mV), the production of γ-decalactone was very low. These results were linked to changes in the cofactor ratio during lactone production, to the β-oxidation activity involved in decanolide synthesis, and to ultrastructural modification of the cell.
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Affiliation(s)
- Gilles Feron
- Laboratoire de microbiologie, UMR INRA-UB 1232, INRA, 17 rue Sully, B.P. 86510, F-21065 Dijon, France.
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Current awareness on yeast. Yeast 2006. [DOI: 10.1002/yea.1285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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