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Gong D, Cong H, Liu S, Zhang L, Wei T, Shi X, Wang Z, Wu X, Song J. Transcriptome Identification and Analysis of Fatty Acid Desaturase Gene Expression at Different Temperatures in Tausonia pullulans 6A7. Microorganisms 2023; 11:2916. [PMID: 38138060 PMCID: PMC10745852 DOI: 10.3390/microorganisms11122916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/30/2023] [Accepted: 11/30/2023] [Indexed: 12/24/2023] Open
Abstract
Tausonia pullulans 6A7 is a low-temperature yeast strain that can produce lipases. Yeast, which is made up of chassis cells, is an important part of synthetic biology, and the use of the lipase-producing properties of T. pullulans 6A7 for the production of fatty acids provides a new pathway for targeted synthesis in yeast cell factories. In this study, we performed RNA-seq on lipase-producing T. pullulans 6A7 at different temperatures (15 °C, 20 °C, 20 °C without corn oil, and 25 °C). Therefore, a total of 8455 differentially expressed genes were screened, and 16 of them were FAD candidate genes. A Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis of group A (15 °C) vs. group D (25 °C) showed that the pathways of fatty acid biosynthesis (map00061) and the biosynthesis of unsaturated fatty acids (map01040) were significantly enriched. In the proposed temporal analysis of differentially expressed genes among the four temperature modulations, we found differentially expressed genes in nine clusters that had the same expression trends; these genes may be jointly involved in multiple biological processes in T. pullulans 6A7. In addition, we found 16 FAD candidate genes involved in fatty acid biosynthesis, and the expression of these genes had similar expression in the transcriptome trends with the different temperature treatments. These findings will help in future in-depth studies of the function and molecular mechanisms of these important FAD genes involved in fatty acid metabolism in yeast, and they could also be conducive to the establishment of a cellular factory for targeted fatty acid production by using yeast.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Jinzhu Song
- School of Life Science and Technology, Harbin Institute of Technology, Harbin 150006, China; (D.G.); (H.C.); (S.L.); (L.Z.); (T.W.); (X.S.); (Z.W.); (X.W.)
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2
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Iwama R, Okahashi N, Suzawa T, Yang C, Matsuda F, Horiuchi H. Comprehensive analysis of the composition of the major phospholipids during the asexual life cycle of the filamentous fungus Aspergillus nidulans. Biochim Biophys Acta Mol Cell Biol Lipids 2023; 1868:159379. [PMID: 37659899 DOI: 10.1016/j.bbalip.2023.159379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 08/03/2023] [Accepted: 08/08/2023] [Indexed: 09/04/2023]
Abstract
Filamentous fungi undergo significant cellular morphological changes during their life cycle. It has recently been reported that deletions of genes that are involved in phospholipid synthesis led to abnormal hyphal morphology and differentiation in filamentous fungi. Although these results suggest the importance of phospholipid balance in their life cycle, comprehensive analyses of cellular phospholipids are limited. Here, we performed lipidomic analysis of A. nidulans during morphological changes in a liquid medium and of colonies on a solid medium. We observed that the phospholipid composition and transcription of the genes involved in phospholipid synthesis changed dynamically during the life cycle. Specifically, the levels of phosphatidylethanolamine, and highly unsaturated phospholipids increased during the establishment of polarity. Furthermore, we demonstrated that the phospholipid composition in the hyphae at colony margins is similar to that during conidial germination. Furthermore, we demonstrated that common and characteristic phospholipid changes occurred during germination in A. nidulans and A. oryzae, and that species-specific changes also occurred. These results suggest that the exquisite regulation of phospholipid composition is crucial for the growth and differentiation of filamentous fungi.
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Affiliation(s)
- Ryo Iwama
- Department of Biotechnology, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-8657, Japan; Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Nobuyuki Okahashi
- Graduate School of Information Science and Technology, Osaka University, 1-5 Yamadaoka, Suita, Osaka 565-0871, Japan; Osaka University Shimadzu Omics Innovation Research Laboratories, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Tetsuki Suzawa
- Department of Biotechnology, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Chuner Yang
- Department of Biotechnology, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Fumio Matsuda
- Graduate School of Information Science and Technology, Osaka University, 1-5 Yamadaoka, Suita, Osaka 565-0871, Japan; Osaka University Shimadzu Omics Innovation Research Laboratories, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hiroyuki Horiuchi
- Department of Biotechnology, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-8657, Japan; Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-8657, Japan.
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3
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Camponeschi I, Montanari A, Mazzoni C, Bianchi MM. Light Stress in Yeasts: Signaling and Responses in Creatures of the Night. Int J Mol Sci 2023; 24:ijms24086929. [PMID: 37108091 PMCID: PMC10139380 DOI: 10.3390/ijms24086929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 03/31/2023] [Accepted: 04/06/2023] [Indexed: 04/29/2023] Open
Abstract
Living organisms on the surface biosphere are periodically yet consistently exposed to light. The adaptive or protective evolution caused by this source of energy has led to the biological systems present in a large variety of organisms, including fungi. Among fungi, yeasts have developed essential protective responses against the deleterious effects of light. Stress generated by light exposure is propagated through the synthesis of hydrogen peroxide and mediated by regulatory factors that are also involved in the response to other stressors. These have included Msn2/4, Crz1, Yap1, and Mga2, thus suggesting that light stress is a common factor in the yeast environmental response.
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Affiliation(s)
- Ilaria Camponeschi
- Department of Biology and Biotechnology "C. Darwin", Sapienza University of Rome, 00185 Rome, Italy
| | - Arianna Montanari
- Department of Biology and Biotechnology "C. Darwin", Sapienza University of Rome, 00185 Rome, Italy
| | - Cristina Mazzoni
- Department of Biology and Biotechnology "C. Darwin", Sapienza University of Rome, 00185 Rome, Italy
| | - Michele Maria Bianchi
- Department of Biology and Biotechnology "C. Darwin", Sapienza University of Rome, 00185 Rome, Italy
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4
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Liu Z, Yu K, Wu S, Weng X, Luo S, Zeng M, Wang X, Hu X. Comparative lipidomics of methanol induced Pichia pastoris cells at different culture phases uncovers the diversity and variability of lipids. Enzyme Microb Technol 2022; 160:110090. [DOI: 10.1016/j.enzmictec.2022.110090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 06/14/2022] [Accepted: 06/16/2022] [Indexed: 11/26/2022]
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5
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Camponeschi I, Montanari A, Beccaccioli M, Reverberi M, Mazzoni C, Bianchi MM. Light-Stress Response Mediated by the Transcription Factor KlMga2 in the Yeast Kluyveromyces lactis. Front Microbiol 2021; 12:705012. [PMID: 34335537 PMCID: PMC8317464 DOI: 10.3389/fmicb.2021.705012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 06/16/2021] [Indexed: 11/20/2022] Open
Abstract
In unicellular organisms like yeasts, which do not have specialized tissues for protection against environmental challenges, the presence of cellular mechanisms to respond and adapt to stress conditions is fundamental. In this work, we aimed to investigate the response to environmental light in Kluyveromyces lactis. Yeast lacks specialized light-sensing proteins; however, Saccharomyces cerevisiae has been reported to respond to light by increasing hydrogen peroxide level and triggering nuclear translocation of Msn2. This is a stress-sensitive transcription factor also present in K. lactis. To investigate light response in this yeast, we analyzed the different phenotypes generated by the deletion of the hypoxia responsive and lipid biosynthesis transcription factor KlMga2. Alterations in growth rate, mitochondrial functioning, ROS metabolism, and fatty acid biosynthesis provide evidence that light was a source of stress in K. lactis and that KlMga2 had a role in the light-stress response. The involvement of KlMsn2 and KlCrz1 in light stress was also explored, but the latter showed no function in this response.
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Affiliation(s)
- Ilaria Camponeschi
- Department of Biology and Biotechnology 'C. Darwin', Sapienza University of Rome, Rome, Italy
| | - Arianna Montanari
- Department of Biology and Biotechnology 'C. Darwin', Sapienza University of Rome, Rome, Italy
| | - Marzia Beccaccioli
- Department of Environmental Biology, Sapienza University of Rome, Rome, Italy
| | - Massimo Reverberi
- Department of Environmental Biology, Sapienza University of Rome, Rome, Italy
| | - Cristina Mazzoni
- Department of Biology and Biotechnology 'C. Darwin', Sapienza University of Rome, Rome, Italy
| | - Michele M Bianchi
- Department of Biology and Biotechnology 'C. Darwin', Sapienza University of Rome, Rome, Italy
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Liu Y, Koh CMJ, Yap SA, Cai L, Ji L. Understanding and exploiting the fatty acid desaturation system in Rhodotorula toruloides. BIOTECHNOLOGY FOR BIOFUELS 2021; 14:73. [PMID: 33741038 PMCID: PMC7977280 DOI: 10.1186/s13068-021-01924-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 03/06/2021] [Indexed: 05/17/2023]
Abstract
BACKGROUND Rhodotorula toruloides is a robust producer of triacylglycerol owing to its fast growth rate and strong metabolic flux under conditions of high cell density fermentation. However, the molecular basis of fatty acid biosynthesis, desaturation and regulation remains elusive. RESULTS We present the molecular characterization of four fatty acid desaturase (FAD) genes in R. toruloides. Biosynthesis of oleic acid (OA) and palmitoleic acid (POA) was conferred by a single-copy ∆9 Fad (Ole1) as targeted deletion of which abolished the biosynthesis of all unsaturated fatty acids. Conversion of OA to linoleic acid (LA) and α-linolenic acid (ALA) was predominantly catalyzed by the bifunctional ∆12/∆15 Fad2. FAD4 was found to encode a trifunctional ∆9/∆12/∆15 FAD, playing important roles in lipid and biomass production as well as stress resistance. Furthermore, an abundantly transcribed OLE1-related gene, OLE2 encoding a 149-aa protein, was shown to regulate Ole1 regioselectivity. Like other fungi, the transcription of FAD genes was controlled by nitrogen levels and fatty acids in the medium. A conserved DNA motif, (T/C)(G/A)TTGCAGA(T/C)CCCAG, was demonstrated to mediate the transcription of OLE1 by POA/OA. The applications of these FAD genes were illustrated by engineering high-level production of OA and γ-linolenic acid (GLA). CONCLUSION Our work has gained novel insights on the transcriptional regulation of FAD genes, evolution of FAD enzymes and their roles in UFA biosynthesis, membrane stress resistance and, cell mass and total fatty acid production. Our findings should illuminate fatty acid metabolic engineering in R. toruloides and beyond.
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Affiliation(s)
- Yanbin Liu
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, 117604, Singapore
| | - Chong Mei John Koh
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, 117604, Singapore
| | - Sihui Amy Yap
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, 117604, Singapore
| | - Lin Cai
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, 117604, Singapore
| | - Lianghui Ji
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, 117604, Singapore.
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore.
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Whiteford R, Nurika I, Schiller T, Barker G. The white-rot fungus, Phanerochaete chrysosporium, under combinatorial stress produces variable oil profiles following analysis of secondary metabolites. J Appl Microbiol 2021; 131:1305-1317. [PMID: 33484615 DOI: 10.1111/jam.15013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 11/10/2020] [Accepted: 01/15/2021] [Indexed: 11/29/2022]
Abstract
AIMS The effects of combinatorial stress on lipid production in Phanerochaete chrysosporium remain understudied. This species of white-rot fungi was cultivated on solid-state media while under variable levels of known abiotic and biotic stressors to establish the effect upon fungal oil profiles. METHODS AND RESULTS Environmental stressors induced upon the fungus included the following: temperature, nutrient limitation and interspecies competition to assess impact upon oil profiles. Fatty acid type and its concentration were determined using analytical methods of gas chromatography and mass spectrometry. Growth rate under stress was established using high-performance liquid chromatography with ergosterol as the biomarker. Fungi grown on solid-state agar were able to simultaneously produce short- and long-chain fatty acids which appeared to be influenced by nutritional composition as well as temperature. Addition of nitrogen supplements increased the growth rate, but lipid dynamics remained unchanged. Introducing competition-induced stress had significantly altered the production of certain fatty acids beyond that of the monoculture while under nutrient-limiting conditions. Linoleic acid concentrations, for example, increased from an average of 885 ng μl-1 at monoculture towards 13 820 ng μl-1 at co-culture, following 7 days of incubation. CONCLUSIONS Interspecies competition produced the most notable impact on lipid production for solid-state media cultivated fungi while the addition of nitrogen supplementation presented growth and lipid accumulation to be uncorrelated. Combinatorial stress therefore influences the yield of overall lipid production as well as the number of intermediate fatty acids produced, deriving similar oil profiles to the composition of vegetable and fish oils. SIGNIFICANCE AND IMPACT OF THE STUDY Fungal secondary metabolism remains highly sensitive following combinatorial stress. The outcome impacts the research towards optimizing fungal oil profiles for biomass and nutrition. Future investigations on fungal stress tolerance mechanisms need to address these environmental factors throughout the experimental design.
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Affiliation(s)
- R Whiteford
- School of Life Sciences, The University of Warwick, Coventry, UK
| | - I Nurika
- Department of Agroindustrial Technology, Faculty of Agricultural Technology, University of Brawijaya, Malang, Indonesia
| | - T Schiller
- Warwick Manufacturing Group, The University of Warwick, Coventry, UK
| | - G Barker
- School of Life Sciences, The University of Warwick, Coventry, UK
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8
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Danne-Rasche N, Rubenzucker S, Ahrends R. Uncovering the complexity of the yeast lipidome by means of nLC/NSI-MS/MS. Anal Chim Acta 2020; 1140:199-209. [PMID: 33218482 DOI: 10.1016/j.aca.2020.10.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 10/04/2020] [Accepted: 10/08/2020] [Indexed: 01/08/2023]
Abstract
Saccharomyces cerevisiae is a eukaryotic model organism widely used for the investigation of fundamental cellular processes and disease mechanisms. Consequently, the lipid landscape of yeast has been extensively investigated and up to this day the lipidome is considered as rather basic. Here, we used a nLC/NSI-MS/MS method combined with a semi-autonomous data analysis workflow for an in-depth evaluation of the steady state yeast lipidome. We identified close to 900 lipid species across 26 lipid classes, including glycerophospholipids, sphingolipids, glycerolipids and sterol lipids. Most lipid classes are dominated by few high abundant species, with a multitude of lower abundant lipids contributing to the overall complexity of the yeast lipidome. Contrary to previously published datasets, odd-chain and diunsaturated fatty acyl moieties were found to be commonly incorporated in multiple lipid classes. Careful data evaluation furthermore revealed the presence of putative new lipid species such as MMPSs (mono-methylated phosphatidylserine), not yet described in yeast. Overall, our analysis achieved a more than 4-fold increase in lipid identifications compared to previous approaches, underscoring the use of nLC/NSI-MS/MS methods for the in-depth investigation of lipidomes.
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Affiliation(s)
- Niklas Danne-Rasche
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V, Otto-Hahn-Straße 6b, 44227, Dortmund, Germany
| | - Stefanie Rubenzucker
- Department of Analytical Chemistry, University of Vienna, Währinger Strasse 38, 1090, Vienna, Austria
| | - Robert Ahrends
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V, Otto-Hahn-Straße 6b, 44227, Dortmund, Germany; Department of Analytical Chemistry, University of Vienna, Währinger Strasse 38, 1090, Vienna, Austria.
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9
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Karamanou DA, Aliferis KA. The yeast (Saccharomyces cerevisiae) YCF1 vacuole transporter: Evidence on its implication into the yeast resistance to flusilazole as revealed by GC/EI/MS metabolomics. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2020; 165:104475. [PMID: 32359550 DOI: 10.1016/j.pestbp.2019.09.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 09/17/2019] [Indexed: 05/14/2023]
Abstract
The development of plant protection product (PPPs)-resistant populations of plant pathogens, pests, and weeds, represents a major challenge that the crop protection sector is facing. Focusing on plant pathogenic fungi, the increased efflux of the active ingredients (a.i.) from the cytoplasm is highly correlated to elevated resistance levels to the applied fungicides. Such mechanism is regulated by ATP-binding cassette transporters (ABC transporters), and although it has been investigated for the past two decades, the latest developments in "omics" technologies could provide new insights with potential applications in crop protection. Within this context, and based on results from preliminary experiments, we have undertaken the task of mining the involvement of the ABC transporter YCF1, which is located in the vacuole membrane, in the fungicide resistance development, applying a functional genomics approach and using yeast (Saccharomyces cerevisiae) as the model organism. Among the fungicides being assessed, flusilazole, which belongs to the azole group of dimethylation inhibitors (DMIs), was discovered as a possible substrate of the YCF1. GC/EI/MS metabolomics analysis revealed the effect of the fungicide's toxicity and that of genotype on yeast's metabolism, confirming the role of this transporter. Fluctuations in the activity of various yeast biosynthetic pathways associated with stress responses were recorded, and corresponding metabolites-biomarkers of flusilazole toxicity were discovered. The metabolites α,α-trehalose, glycerol, myo-inositol-1-phosphate, GABA, l-glutamine, l-tryptophan, l-phenylalanine, l-tyrosine, and phosphate, were the major identified biomarkers of toxicity. Among these, are metabolites that play important roles in fungal metabolism (e.g., cell responses to osmotic stress) or serve as signaling molecules. To the best of our knowledge, this is the first report on the implication of YCF1 in fungal resistance to PPPs. Additionally, the results of GC/EI/MS yeast metabolomics confirmed the robustness of the method and its applicability in the high-throughput study of fungal resistance to fungicides.
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Affiliation(s)
- Dimitra A Karamanou
- Laboratory of Pesticide Science, Agricultural University of Athens, Iera Odos 75, 118 55 Athens, Greece
| | - Konstantinos A Aliferis
- Laboratory of Pesticide Science, Agricultural University of Athens, Iera Odos 75, 118 55 Athens, Greece; Department of Plant Science, McGill University, 21111 Lakeshore Road, Sainte-Anne-de-Bellevue, Quebec H9X 3V9, Canada.
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10
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Camponeschi I, Damasco A, Uversky VN, Giuliani A, Bianchi MM. Phenotypic suppression caused by resonance with light-dark cycles indicates the presence of a 24-hours oscillator in yeast and suggests a new role of intrinsically disordered protein regions as internal mediators. J Biomol Struct Dyn 2020; 39:2490-2501. [PMID: 32223547 DOI: 10.1080/07391102.2020.1749133] [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] [Indexed: 12/16/2022]
Abstract
The mutual interaction between environment and life is a main topic of biological sciences. An interesting aspect of this interaction is the existence of biological rhythms spanning all the levels of organisms from bacteria to humans. On the other hand, the existence of a coupling between external oscillatory stimuli and adaptation and evolution rate of biological systems is a still unexplored issue. Here we give the demonstration of a substantial increase of heritable phenotypic changes in yeast, an organism lacking a photoreception system, when growing at 12 h light/dark cycles, with respect to both stable dark (or light) or non-12 + 12 h cycling. The model system was a yeast strain lacking a gene whose product is at the crossroad of many different physiological regulations, so ruling out any simple explanation in terms of increase in reverse gene mutations. The abundance of intrinsically disordered protein regions (IDPRs) in both deleted gene product and in its vast ensemble of interactors supports the hypothesis that resonance with the environmental cycle might be mediated by intrinsic disorder-driven interactions of protein molecules. This result opens to the speculation of the effect of environment/biological resonance phenomena in evolution and of the role of protein intrinsically disordered regions as internal mediators.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Ilaria Camponeschi
- Department of Biology and Biotechnology 'Charles Darwin', Sapienza Università di Roma, Roma, Italy
| | - Achille Damasco
- Department of Physics 'Ettore Pancini', Università di Napoli Federico II, Napoli, Italy
| | - Vladimir N Uversky
- Department of Molecular Medicine and Byrd Alzheimer's Research Institute, Morsani College of Medicine, University of South Florida, Tampa, FL, USA.,Laboratory of New Methods in Biology, Institute for Biological Instrumentation of the Russian Academy of Sciences, Federal Research Center "Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences", Pushchino, Russia
| | - Alessandro Giuliani
- Department of Environment and Health, Istituto Superiore di Sanità, Roma, Italy
| | - Michele M Bianchi
- Department of Biology and Biotechnology 'Charles Darwin', Sapienza Università di Roma, Roma, Italy
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11
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Molecular cloning and functional analysis of a Δ 12-fatty acid desaturase from the Antarctic microalga Chlamydomonas sp. ICE-L. 3 Biotech 2019; 9:328. [PMID: 31406650 DOI: 10.1007/s13205-019-1858-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 08/02/2019] [Indexed: 12/22/2022] Open
Abstract
Chlamydomonas sp. ICE-L, which can thrive in extreme environments of the Antarctic, could represent a promising alternative for polyunsaturated fatty acid (PUFA) production. A new Δ12-fatty acid desaturase (FAD)-encoding gene (Δ 12 CiFAD), 1269 bp in size, was cloned from Chlamydomonas sp. ICE-L. Bioinformatics analysis showed that Δ 12 CiFAD-encoded protein was homologous to known FADs with conserved histidine motifs, and localized to the chloroplast. Functional analysis of Δ 12 CiFAD indicated that recombinant Synechococcus 6803 expressing Δ12CiFAD could accumulate C18:2, whereas recombinant Saccharomyces cerevisiae expressing this enzyme could not accumulate C18:2 or any other new fatty acids. These results indicate that Δ12CiFAD is a functional enzyme in the chloroplast that can adjust Chlamydomonas sp. ICE-L cell membrane fluidity to adapt to Antarctic extreme low-temperature environments, which give us insights into the frigostable and cold-resistant mechanisms of hypothermic organisms.
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12
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Engineering microbial membranes to increase stress tolerance of industrial strains. Metab Eng 2019; 53:24-34. [DOI: 10.1016/j.ymben.2018.12.010] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 12/29/2018] [Accepted: 12/29/2018] [Indexed: 12/29/2022]
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13
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Vázquez J, Grillitsch K, Daum G, Mas A, Beltran G, Torija MJ. The role of the membrane lipid composition in the oxidative stress tolerance of different wine yeasts. Food Microbiol 2019; 78:143-154. [DOI: 10.1016/j.fm.2018.10.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 04/16/2018] [Accepted: 10/05/2018] [Indexed: 12/21/2022]
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14
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Santomartino R, Camponeschi I, Polo G, Immesi A, Rinaldi T, Mazzoni C, Brambilla L, Bianchi MM. The hypoxic transcription factor KlMga2 mediates the response to oxidative stress and influences longevity in the yeast Kluyveromyces lactis. FEMS Yeast Res 2019; 19:5365995. [DOI: 10.1093/femsyr/foz020] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 02/26/2019] [Indexed: 12/17/2022] Open
Abstract
ABSTRACT
Hypoxia is defined as the decline of oxygen availability, depending on environmental supply and cellular consumption rate. The decrease in O2 results in reduction of available energy in facultative aerobes. The response and/or adaptation to hypoxia and other changing environmental conditions can influence the properties and functions of membranes by modifying lipid composition. In the yeast Kluyveromyces lactis, the KlMga2 gene is a hypoxic regulatory factor for lipid biosynthesis—fatty acids and sterols—and is also involved in glucose signaling, glucose catabolism and is generally important for cellular fitness.
In this work we show that, in addition to the above defects, the absence of the KlMGA2 gene caused increased resistance to oxidative stress and extended lifespan of the yeast, associated with increased expression levels of catalase and SOD genes. We propose that KlMga2 might also act as a mediator of the oxidative stress response/adaptation, thus revealing connections among hypoxia, glucose signaling, fatty acid biosynthesis and ROS metabolism in K. lactis.
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Affiliation(s)
- Rosa Santomartino
- Department Biology and Biotechnology C. Darwin, University of Roma Sapienza, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Ilaria Camponeschi
- Department Biology and Biotechnology C. Darwin, University of Roma Sapienza, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Germano Polo
- Department Biology and Biotechnology C. Darwin, University of Roma Sapienza, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Alessio Immesi
- Department Biology and Biotechnology C. Darwin, University of Roma Sapienza, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Teresa Rinaldi
- Department Biology and Biotechnology C. Darwin, University of Roma Sapienza, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Cristina Mazzoni
- Department Biology and Biotechnology C. Darwin, University of Roma Sapienza, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Luca Brambilla
- Department Biotechnology and Biosciences, University of Milano Bicocca, Piazza della Scienza 2, 20126 Milano, Italy
| | - Michele M Bianchi
- Department Biology and Biotechnology C. Darwin, University of Roma Sapienza, Piazzale Aldo Moro 5, 00185 Roma, Italy
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15
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Wang M, Chen H, Ailati A, Chen W, Chilton FH, Todd Lowther W, Chen YQ. Substrate specificity and membrane topologies of the iron-containing ω3 and ω6 desaturases from Mortierella alpina. Appl Microbiol Biotechnol 2017; 102:211-223. [PMID: 29082420 DOI: 10.1007/s00253-017-8585-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 09/06/2017] [Accepted: 10/09/2017] [Indexed: 11/28/2022]
Abstract
Polyunsaturated fatty acids (PUFAs) are essential lipids for cell function, normal growth, and development, serving as key structural components of biological membranes and modulating critical signal transduction events. Omega-3 (n-3) long chain PUFAs (LC-PUFAs) such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) have been shown to protect against inflammatory diseases and enhance brain development and function. This had led to a marked increase in demand for fish and fish oils in human diets, supplements, and aquaculture and created a need for new, sustainable n-3 LC-PUFA sources. We have studied for the first time homogenous preparations of the membrane-type ω6 and ω3 fatty acid desaturases from the fungus Mortierella alpina, as a model system to produce PUFAs. These desaturases possess a di-iron metal center and are selective for 18:1 n-9 and 18:2 n-6 acyl-CoA substrates, respectively. Sequence alignments and membrane topology predictions support that these enzymes have unique cap regions that may include the rearrangement and repositioning of the active site, especially when compared to the mammalian stearoyl-coenzyme A desaturase-1 (SCD1) and the related sphingolipid α-hydroxylase (Scs7p) that act upon different substrates.
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Affiliation(s)
- Mingxuan Wang
- State Key Laboratory 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, Medical Center Blvd., Winston-Salem, NC, 27157, USA
| | - Haiqin Chen
- State Key Laboratory 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
| | - Aisikaer Ailati
- State Key Laboratory 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, Medical Center Blvd., Winston-Salem, NC, 27157, USA
| | - Wei Chen
- State Key Laboratory 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
| | - Floyd H Chilton
- Department of Physiology and Pharmacology, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC, 27157, USA
| | - W Todd Lowther
- Department of Biochemistry, Center for Structural Biology, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC, 27157, USA.
| | - Yong Q Chen
- State Key Laboratory 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, Medical Center Blvd., Winston-Salem, NC, 27157, USA.
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