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Livelo C, Guo Y, Abou Daya F, Rajasekaran V, Varshney S, Le HD, Barnes S, Panda S, Melkani GC. Time-restricted feeding promotes muscle function through purine cycle and AMPK signaling in Drosophila obesity models. Nat Commun 2023; 14:949. [PMID: 36810287 PMCID: PMC9944249 DOI: 10.1038/s41467-023-36474-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 02/01/2023] [Indexed: 02/23/2023] Open
Abstract
Obesity caused by genetic and environmental factors can lead to compromised skeletal muscle function. Time-restricted feeding (TRF) has been shown to prevent muscle function decline from obesogenic challenges; however, its mechanism remains unclear. Here we demonstrate that TRF upregulates genes involved in glycine production (Sardh and CG5955) and utilization (Gnmt), while Dgat2, involved in triglyceride synthesis is downregulated in Drosophila models of diet- and genetic-induced obesity. Muscle-specific knockdown of Gnmt, Sardh, and CG5955 lead to muscle dysfunction, ectopic lipid accumulation, and loss of TRF-mediated benefits, while knockdown of Dgat2 retains muscle function during aging and reduces ectopic lipid accumulation. Further analyses demonstrate that TRF upregulates the purine cycle in a diet-induced obesity model and AMPK signaling-associated pathways in a genetic-induced obesity model. Overall, our data suggest that TRF improves muscle function through modulations of common and distinct pathways under different obesogenic challenges and provides potential targets for obesity treatments.
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Affiliation(s)
- Christopher Livelo
- Department of Pathology, Division of Molecular and Cellular Pathology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - Yiming Guo
- Department of Pathology, Division of Molecular and Cellular Pathology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - Farah Abou Daya
- Department of Pathology, Division of Molecular and Cellular Pathology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - Vasanthi Rajasekaran
- Department of Pathology, Division of Molecular and Cellular Pathology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - Shweta Varshney
- Regulatory Biology Laboratory, Salk Institute for Biological Studies, La Jolla, CA, 92037, USA
- Department of Biology, Molecular Biology Institute, San Diego State University, San Diego, CA, 92182, USA
| | - Hiep D Le
- Regulatory Biology Laboratory, Salk Institute for Biological Studies, La Jolla, CA, 92037, USA
| | - Stephen Barnes
- Department of Pharmacology and Toxicology, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - Satchidananda Panda
- Regulatory Biology Laboratory, Salk Institute for Biological Studies, La Jolla, CA, 92037, USA
| | - Girish C Melkani
- Department of Pathology, Division of Molecular and Cellular Pathology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, 35294, USA.
- Department of Biology, Molecular Biology Institute, San Diego State University, San Diego, CA, 92182, USA.
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2
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Demoor A, Lacaze I, Ferrari R, Lalanne C, Silar P, Brun S. GUN Mutants: New Weapons To Unravel Ascospore Germination Regulation in the Model Fungus Podospora anserina. Microbiol Spectr 2023; 11:e0146122. [PMID: 36786590 PMCID: PMC10100959 DOI: 10.1128/spectrum.01461-22] [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: 04/22/2022] [Accepted: 09/14/2022] [Indexed: 02/15/2023] Open
Abstract
In Podospora anserina as in many other Ascomycetes, ascospore germination is a regulated process that requires the breaking of dormancy. Despite its importance in survival and dispersal, ascospore germination in filamentous fungi has been poorly investigated, and little is known about its regulation and genetic control. We have designed a positive genetic screen that led to the isolation of mutants showing uncontrolled germination, the GUN (Germination UNcontrolled) mutants. Here, we report on the characterization of the gun1SG (Spontaneous Germination) mutant. We show that gun1SG is mutated in Pa_6_1340, the ortholog of Magnaporthe oryzae Pth2, which encodes a carnitine-acetyltransferase (CAT) involved in the shuttling of acetyl coenzyme A between peroxisomes and mitochondria and which is required for appressorium development. Bioinformatic analysis revealed that the mutated residue (I441) is highly conserved among Fungi and that the mutation has a deleterious impact on the protein function. We show that GUN1 is essential for ascospore germination and that the protein is localized both in mitochondria and in peroxisomes. Finally, epistasis studies allowed us to place GUN1 together with the PaMpk2 MAPK pathway upstream of the PaNox2/PaPls1 complex in the regulation of ascospore germination. In addition, we show that GUN1 plays a role in appressorium functioning. The pivotal role of GUN1, the ortholog of Pth2, in ascospore germination and in appressorium functioning reinforces the idea of a common genetic regulation governing both appressorium development and melanized ascospore germination. Furthermore, we characterize the second CAT encoded in P. anserina genome, Pa_3_7660/GUP1, and we show that the function of both CATs is conserved in P. anserina. IMPORTANCE The regulation of ascospore germination in filamentous fungi has been poorly investigated so far. To unravel new genes involved in this regulation pathway, we conducted a genetic screen in Podospora anserina, and we isolated 57 mutants affected in ascospore germination. Here, we describe the Germination UNcontrolled One (gun1SG) mutant, and we characterize the gene affected. GUN1 is a peroxisomal/mitochondrial carnitine-acetyltransferase required for acetyl coenzyme A shuttling between both organelles, and we show that GUN1 is a pleiotropic gene also involved in appressorium functioning similarly to its ortholog, the pathogenesis factor Pth2, in the plant pathogen Magnaporthe oryzae. Given the similarities in the regulation of appressorium development and ascospore germination, we speculate that discovering new genes controlling ascospore germination in P. anserina may lead to the discovery of new pathogenesis factors in pathogenic fungi. The characterization of GUN1, the ortholog of M. oryzae Pth2, represents a proof of concept.
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Affiliation(s)
- Alexander Demoor
- Université Paris Cité, Laboratoire Interdisciplinaire des Energies de Demain/UMR 8236, Paris, France
| | - Isabelle Lacaze
- Université Paris Cité, Laboratoire Interdisciplinaire des Energies de Demain/UMR 8236, Paris, France
| | - Roselyne Ferrari
- Université Paris Cité, Laboratoire Interdisciplinaire des Energies de Demain/UMR 8236, Paris, France
| | - Christophe Lalanne
- Université Paris Cité, Laboratoire Interdisciplinaire des Energies de Demain/UMR 8236, Paris, France
| | - Philippe Silar
- Université Paris Cité, Laboratoire Interdisciplinaire des Energies de Demain/UMR 8236, Paris, France
| | - Sylvain Brun
- Université Paris Cité, Laboratoire Interdisciplinaire des Energies de Demain/UMR 8236, Paris, France
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3
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Characterization of the endogenous promoters in Yarrowia lipolytica for the biomanufacturing applications. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.11.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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4
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Rousta N, Ferreira JA, Taherzadeh MJ. Production of L-carnitine-enriched edible filamentous fungal biomass through submerged cultivation. Bioengineered 2021; 12:358-368. [PMID: 33323030 PMCID: PMC8806343 DOI: 10.1080/21655979.2020.1863618] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 12/09/2020] [Indexed: 02/08/2023] Open
Abstract
The edible filamentous fungi are hot candidate for future supply of functional food and feed with e.g. protein, essential amino acids, and compounds with immunostimulant activity. L-carnitine that plays a crucial role in energy metabolism represents a functional compound normally produced by Zygomycetes filamentous fungus Rhizopus oligosporus in solid-state fermentation. The present study provides the first insights on production of L-carnitine-enriched edible fungal biomass through submerged cultivation of several Ascomycetes and Zygomycetes including Aspergillus oryzae, Neurospora intermedia, Rhizopus oryzae, and Rhizopus oligosporus. A. oryzae with 3 mg L-carnitine yield per gram of fungal biomass, indicates great potential on production of this bioactive compound which is remarkably higher than the other tested fungi in this work and also previous studies. In addition to fungal strain, other factors such as cultivation time and presence of yeast extract were found to play a role. Further studies on submerged growth optimization of A. oryzae in both high-quality recipes and in medium based on low-value substrates are proposed in order to clarify its potential for production of L-carnitine-enriched fungal biomass.
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Affiliation(s)
- Neda Rousta
- Swedish Centre for Resource Recovery, University of Borås, Borås, Sweden
| | - Jorge A. Ferreira
- Swedish Centre for Resource Recovery, University of Borås, Borås, Sweden
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5
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Šečić E, Zanini S, Wibberg D, Jelonek L, Busche T, Kalinowski J, Nasfi S, Thielmann J, Imani J, Steinbrenner J, Kogel KH. A novel plant-fungal association reveals fundamental sRNA and gene expression reprogramming at the onset of symbiosis. BMC Biol 2021; 19:171. [PMID: 34429124 PMCID: PMC8385953 DOI: 10.1186/s12915-021-01104-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 07/16/2021] [Indexed: 01/15/2023] Open
Affiliation(s)
- Ena Šečić
- Institute of Phytopathology, Centre for BioSystems, Land Use and Nutrition, Justus Liebig University, 35392, Giessen, Germany
| | - Silvia Zanini
- Institute of Phytopathology, Centre for BioSystems, Land Use and Nutrition, Justus Liebig University, 35392, Giessen, Germany
| | - Daniel Wibberg
- Center for Biotechnology - CeBiTec, Bielefeld University, 33615, Bielefeld, Germany
| | - Lukas Jelonek
- Institute of Bioinformatics and Systems Biology, Justus Liebig University, 35392, Giessen, Germany
| | - Tobias Busche
- Center for Biotechnology - CeBiTec, Bielefeld University, 33615, Bielefeld, Germany
| | - Jörn Kalinowski
- Center for Biotechnology - CeBiTec, Bielefeld University, 33615, Bielefeld, Germany
| | - Sabrine Nasfi
- Institute of Phytopathology, Centre for BioSystems, Land Use and Nutrition, Justus Liebig University, 35392, Giessen, Germany
| | - Jennifer Thielmann
- Institute of Phytopathology, Centre for BioSystems, Land Use and Nutrition, Justus Liebig University, 35392, Giessen, Germany
| | - Jafargholi Imani
- Institute of Phytopathology, Centre for BioSystems, Land Use and Nutrition, Justus Liebig University, 35392, Giessen, Germany
| | - Jens Steinbrenner
- Institute of Phytopathology, Centre for BioSystems, Land Use and Nutrition, Justus Liebig University, 35392, Giessen, Germany
| | - Karl-Heinz Kogel
- Institute of Phytopathology, Centre for BioSystems, Land Use and Nutrition, Justus Liebig University, 35392, Giessen, Germany.
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Abstract
Aspergillus fumigatus is a major opportunistic fungal pathogen of immunocompromised and immunocompetent hosts. To successfully establish an infection, A. fumigatus needs to use host carbon sources, such as acetate, present in the body fluids and peripheral tissues. However, utilization of acetate as a carbon source by fungi in the context of infection has not been investigated. This work shows that acetate is metabolized via different pathways in A. fumigatus and that acetate utilization is under the regulatory control of a transcription factor (TF), FacB. A. fumigatus acetate utilization is subject to carbon catabolite repression (CCR), although this is only partially dependent on the TF and main regulator of CCR CreA. The available extracellular carbon source, in this case glucose and acetate, significantly affected A. fumigatus virulence traits such as secondary metabolite secretion and cell wall composition, with the latter having consequences for resistance to oxidative stress, antifungal drugs, and human neutrophil-mediated killing. Furthermore, deletion of facB significantly impaired the in vivo virulence of A. fumigatus in both insect and mammalian models of invasive aspergillosis. This is the first report on acetate utilization in A. fumigatus, and this work further highlights the importance of available host-specific carbon sources in shaping fungal virulence traits and subsequent disease outcome, and a potential target for the development of antifungal strategies. IMPORTANCE Aspergillus fumigatus is an opportunistic fungal pathogen in humans. During infection, A. fumigatus is predicted to use host carbon sources, such as acetate, present in body fluids and peripheral tissues, to sustain growth and promote colonization and invasion. This work shows that A. fumigatus metabolizes acetate via different pathways, a process that is dependent on the transcription factor FacB. Furthermore, the type and concentration of the extracellular available carbon source were determined to shape A. fumigatus virulence determinants such as secondary metabolite secretion and cell wall composition. Subsequently, interactions with immune cells are altered in a carbon source-specific manner. FacB is required for A. fumigatus in vivo virulence in both insect and mammalian models of invasive aspergillosis. This is the first report that characterizes acetate utilization in A. fumigatus and highlights the importance of available host-specific carbon sources in shaping virulence traits and potentially subsequent disease outcome.
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7
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Moellmann J, Klinkhammer BM, Droste P, Kappel B, Haj-Yehia E, Maxeiner S, Artati A, Adamski J, Boor P, Schütt K, Lopaschuk GD, Verma S, Marx N, Lehrke M. Empagliflozin improves left ventricular diastolic function of db/db mice. Biochim Biophys Acta Mol Basis Dis 2020; 1866:165807. [PMID: 32353614 DOI: 10.1016/j.bbadis.2020.165807] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 04/09/2020] [Accepted: 04/15/2020] [Indexed: 12/25/2022]
Abstract
OBJECTIVES Investigation of the effect of SGLT2 inhibition by empagliflozin on left ventricular function in a model of diabetic cardiomyopathy. BACKGROUND SGLT2 inhibition is a new strategy to treat diabetes. In the EMPA-REG Outcome trial empagliflozin treatment reduced cardiovascular and overall mortality in patients with diabetes presumably due to beneficial cardiac effects, leading to reduced heart failure hospitalization. The relevant mechanisms remain currently elusive but might be mediated by a shift in cardiac substrate utilization leading to improved energetic supply to the heart. METHODS We used db/db mice on high-fat western diet with or without empagliflozin treatment as a model of severe diabetes. Left ventricular function was assessed by pressure catheter with or without dobutamine stress. RESULTS Treatment with empagliflozin significantly increased glycosuria, improved glucose metabolism, ameliorated left ventricular diastolic function and reduced mortality of mice. This was associated with reduced cardiac glucose concentrations and decreased calcium/calmodulin-dependent protein kinase (CaMKII) activation with subsequent less phosphorylation of the ryanodine receptor (RyR). No change of cardiac ketone bodies or branched-chain amino acid (BCAA) metabolites in serum was detected nor was cardiac expression of relevant catabolic enzymes for these substrates affected. CONCLUSIONS In a murine model of severe diabetes empagliflozin-dependent SGLT2 inhibition improved diastolic function and reduced mortality. Improvement of diastolic function was likely mediated by reduced spontaneous diastolic sarcoplasmic reticulum (SR) calcium release but independent of changes in cardiac ketone and BCAA metabolism.
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Affiliation(s)
- Julia Moellmann
- Department of Internal Medicine I, University Hospital Aachen, RWTH Aachen University, Aachen, Germany
| | - Barbara M Klinkhammer
- Institute of Pathology, University Hospital Aachen, RWTH Aachen University, Aachen, Germany
| | - Patrick Droste
- Institute of Pathology, University Hospital Aachen, RWTH Aachen University, Aachen, Germany
| | - Ben Kappel
- Department of Internal Medicine I, University Hospital Aachen, RWTH Aachen University, Aachen, Germany
| | - Elias Haj-Yehia
- Department of Internal Medicine I, University Hospital Aachen, RWTH Aachen University, Aachen, Germany
| | - Sebastian Maxeiner
- Department of Internal Medicine I, University Hospital Aachen, RWTH Aachen University, Aachen, Germany
| | - Anna Artati
- Research Unit Molecular Endocrinology and Metabolism, Helmholtz Centrum Munich, German Research Center for Environmental Health (GmbH), Munich-Neuherberg, Germany
| | - Jerzy Adamski
- Research Unit Molecular Endocrinology and Metabolism, Helmholtz Centrum Munich, German Research Center for Environmental Health (GmbH), Munich-Neuherberg, Germany; Chair of Experimental Genetics, Technical University of Munich, Freising-Weihenstephan, Germany; German Center for Diabetes Research (DZD e.V.), Munich-Neuherberg, Germany; Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Peter Boor
- Institute of Pathology, University Hospital Aachen, RWTH Aachen University, Aachen, Germany
| | - Katharina Schütt
- Department of Internal Medicine I, University Hospital Aachen, RWTH Aachen University, Aachen, Germany
| | - Gary D Lopaschuk
- Cardiovascular Research Centre, University of Alberta, Edmonton, Alberta, Canada
| | - Subodh Verma
- Division of Cardiac Surgery, Keenan Research Centre for Biomedical Science and Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, ON, Canada
| | - Nikolaus Marx
- Department of Internal Medicine I, University Hospital Aachen, RWTH Aachen University, Aachen, Germany.
| | - Michael Lehrke
- Department of Internal Medicine I, University Hospital Aachen, RWTH Aachen University, Aachen, Germany.
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8
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van Munster JM, Daly P, Blythe MJ, Ibbett R, Kokolski M, Gaddipati S, Lindquist E, Singan VR, Barry KW, Lipzen A, Ngan CY, Petzold CJ, Chan LJG, Arvas M, Raulo R, Pullan ST, Delmas S, Grigoriev IV, Tucker GA, Simmons BA, Archer DB. Succession of physiological stages hallmarks the transcriptomic response of the fungus Aspergillus niger to lignocellulose. BIOTECHNOLOGY FOR BIOFUELS 2020; 13:69. [PMID: 32313551 PMCID: PMC7155255 DOI: 10.1186/s13068-020-01702-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 03/24/2020] [Indexed: 05/04/2023]
Abstract
BACKGROUND Understanding how fungi degrade lignocellulose is a cornerstone of improving renewables-based biotechnology, in particular for the production of hydrolytic enzymes. Considerable progress has been made in investigating fungal degradation during time-points where CAZyme expression peaks. However, a robust understanding of the fungal survival strategies over its life time on lignocellulose is thereby missed. Here we aimed to uncover the physiological responses of the biotechnological workhorse and enzyme producer Aspergillus niger over its life time to six substrates important for biofuel production. RESULTS We analysed the response of A. niger to the feedstock Miscanthus and compared it with our previous study on wheat straw, alone or in combination with hydrothermal or ionic liquid feedstock pretreatments. Conserved (substrate-independent) metabolic responses as well as those affected by pretreatment and feedstock were identified via multivariate analysis of genome-wide transcriptomics combined with targeted transcript and protein analyses and mapping to a metabolic model. Initial exposure to all substrates increased fatty acid beta-oxidation and lipid metabolism transcripts. In a strain carrying a deletion of the ortholog of the Aspergillus nidulans fatty acid beta-oxidation transcriptional regulator farA, there was a reduction in expression of selected lignocellulose degradative CAZyme-encoding genes suggesting that beta-oxidation contributes to adaptation to lignocellulose. Mannan degradation expression was wheat straw feedstock-dependent and pectin degradation was higher on the untreated substrates. In the later life stages, known and novel secondary metabolite gene clusters were activated, which are of high interest due to their potential to synthesize bioactive compounds. CONCLUSION In this study, which includes the first transcriptional response of Aspergilli to Miscanthus, we highlighted that life time as well as substrate composition and structure (via variations in pretreatment and feedstock) influence the fungal responses to lignocellulose. We also demonstrated that the fungal response contains physiological stages that are conserved across substrates and are typically found outside of the conditions with high CAZyme expression, as exemplified by the stages that are dominated by lipid and secondary metabolism.
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Affiliation(s)
- Jolanda M. van Munster
- School of Life Sciences, University of Nottingham, University Park, Nottingham, NG7 2RD UK
- Manchester Institute of Biotechnology (MIB) & School of Chemistry, The University of Manchester, Manchester, M1 7DN UK
| | - Paul Daly
- School of Life Sciences, University of Nottingham, University Park, Nottingham, NG7 2RD UK
- Fungal Physiology, Westerdijk Fungal Biodiversity Institute & Fungal Molecular Physiology, Utrecht University, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands
- Present Address: Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, People’s Republic of China
| | - Martin J. Blythe
- Deep Seq, Faculty of Medicine and Health Sciences, Queen’s Medical Centre, University of Nottingham, Nottingham, NG7 2UH UK
| | - Roger Ibbett
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD UK
| | - Matt Kokolski
- School of Life Sciences, University of Nottingham, University Park, Nottingham, NG7 2RD UK
| | - Sanyasi Gaddipati
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD UK
| | - Erika Lindquist
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA 94598 USA
| | - Vasanth R. Singan
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA 94598 USA
| | - Kerrie W. Barry
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA 94598 USA
| | - Anna Lipzen
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA 94598 USA
| | - Chew Yee Ngan
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA 94598 USA
| | | | | | - Mikko Arvas
- VTT Technical Research Centre of Finland, Tietotie 2, P.O. Box FI-1000, 02044 VTT Espoo, Finland
| | - Roxane Raulo
- School of Life Sciences, University of Nottingham, University Park, Nottingham, NG7 2RD UK
| | - Steven T. Pullan
- School of Life Sciences, University of Nottingham, University Park, Nottingham, NG7 2RD UK
- Present Address: Public Health England, National Infection Service, Salisbury, UK
| | - Stéphane Delmas
- School of Life Sciences, University of Nottingham, University Park, Nottingham, NG7 2RD UK
- Present Address: Laboratory of Computational and Quantitative Biology, Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, 75005 Paris, France
| | - Igor V. Grigoriev
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA 94598 USA
| | - Gregory A. Tucker
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD UK
| | | | - David B. Archer
- School of Life Sciences, University of Nottingham, University Park, Nottingham, NG7 2RD UK
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Hossain AH, van Gerven R, Overkamp KM, Lübeck PS, Taşpınar H, Türker M, Punt PJ. Metabolic engineering with ATP-citrate lyase and nitrogen source supplementation improves itaconic acid production in Aspergillus niger. BIOTECHNOLOGY FOR BIOFUELS 2019; 12:233. [PMID: 31583019 PMCID: PMC6767652 DOI: 10.1186/s13068-019-1577-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2019] [Accepted: 09/21/2019] [Indexed: 05/28/2023]
Abstract
BACKGROUND Bio-based production of organic acids promises to be an attractive alternative for the chemicals industry to substitute petrochemicals as building-block chemicals. In recent years, itaconic acid (IA, methylenesuccinic acid) has been established as a sustainable building-block chemical for the manufacture of various products such as synthetic resins, coatings, and biofuels. The natural IA producer Aspergillus terreus is currently used for industrial IA production; however, the filamentous fungus Aspergillus niger has been suggested to be a more suitable host for this purpose. In our previous report, we communicated the overexpression of a putative cytosolic citrate synthase citB in an A. niger strain carrying the full IA biosynthesis gene cluster from A. terreus, which resulted in the highest final titer reported for A. niger (26.2 g/L IA). In this research, we have attempted to improve this pathway by increasing the cytosolic acetyl-CoA pool. Additionally, we have also performed fermentation optimization by varying the nitrogen source and concentration. RESULTS To increase the cytosolic acetyl-CoA pool, we have overexpressed genes acl1 and acl2 that together encode for ATP-citrate lyase (ACL). Metabolic engineering of ACL resulted in improved IA production through an apparent increase in glycolytic flux. Strains that overexpress acl12 show an increased yield, titer and productivity in comparison with parental strain CitB#99. Furthermore, IA fermentation conditions were improved by nitrogen supplementation, which resulted in alkalization of the medium and thereby reducing IA-induced weak-acid stress. In turn, the alkalizing effect of nitrogen supplementation enabled an elongated idiophase and allowed final titers up to 42.7 g/L to be reached at a productivity of 0.18 g/L/h and yield of 0.26 g/g in 10-L bioreactors. CONCLUSION Ultimately, this study shows that metabolic engineering of ACL in our rewired IA biosynthesis pathway leads to improved IA production in A. niger due to an increase in glycolytic flux. Furthermore, IA fermentation conditions were improved by nitrogen supplementation that alleviates IA induced weak-acid stress and extends the idiophase.
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Affiliation(s)
- Abeer H. Hossain
- Dutch DNA Biotech B.V., Padualaan 8, 3584 CH Utrecht, The Netherlands
- Molecular Biology and Microbial Food Safety, Swammerdam Institute for Life Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Roy van Gerven
- Dutch DNA Biotech B.V., Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Karin M. Overkamp
- Dutch DNA Biotech B.V., Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Peter S. Lübeck
- Section for Sustainable Biotechnology, Department of Chemistry and Bioscience, Aalborg University, A.C. Meyers Vaenge 15, 2450 Copenhagen SV, Denmark
| | - Hatice Taşpınar
- Pakmaya, Kosekoy Mah. Ankara Cad. No:277, 41310 Kartepe, Kocaeli Turkey
| | - Mustafa Türker
- Pakmaya, Kosekoy Mah. Ankara Cad. No:277, 41310 Kartepe, Kocaeli Turkey
| | - Peter J. Punt
- Dutch DNA Biotech B.V., Padualaan 8, 3584 CH Utrecht, The Netherlands
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10
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Li S, He Z, Hu Y, Li H. Shotgun proteomic analysis of protein profile changes in female rabbit meat: the effect of breed and age. ITALIAN JOURNAL OF ANIMAL SCIENCE 2019. [DOI: 10.1080/1828051x.2019.1659107] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Shaobo Li
- College of Food Science, Southwest University, Chongqing, PR China
| | - Zhifei He
- College of Food Science, Southwest University, Chongqing, PR China
- Chongqing Engineering Research Center of Regional Food, Chongqing, PR China
| | - Ying Hu
- College of Food Science, Southwest University, Chongqing, PR China
| | - Hongjun Li
- College of Food Science, Southwest University, Chongqing, PR China
- Chongqing Engineering Research Center of Regional Food, Chongqing, PR China
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11
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Liang X, Rollins JA. Mechanisms of Broad Host Range Necrotrophic Pathogenesis in Sclerotinia sclerotiorum. PHYTOPATHOLOGY 2018; 108:1128-1140. [PMID: 30048598 DOI: 10.1094/phyto-06-18-0197-rvw] [Citation(s) in RCA: 99] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Among necrotrophic fungi, Sclerotinia sclerotiorum is remarkable for its extremely broad host range and for its aggressive host tissue colonization. With full genome sequencing, transcriptomic analyses and the increasing pace of functional gene characterization, the factors underlying the basis of this broad host range necrotrophic pathogenesis are now being elucidated at a greater pace. Among these, genes have been characterized that are required for infection via compound appressoria in addition to genes associated with colonization that regulate oxalic acid (OA) production and OA catabolism. Moreover, virulence-related secretory proteins have been identified, among which are candidates for manipulating host activities apoplastically and cytoplasmically. Coupled with these mechanistic studies, cytological observations of the colonization process have blurred the heretofore clear-cut biotroph versus necrotroph boundary. In this review, we reexamine the cytology of S. sclerotiorum infection and put more recent molecular and genomic data into the context of this cytology. We propose a two-phase infection model in which the pathogen first evades, counteracts and subverts host basal defense reactions prior to killing and degrading host cells. Spatially, the pathogen may achieve this via the production of compatibility factors/effectors in compound appressoria, bulbous subcuticular hyphae, and primary invasive hyphae. By examining the nuances of this interaction, we hope to illuminate new classes of factors as targets to improve our understanding of broad host range necrotrophic pathogens and provide the basis for understanding corresponding host resistance.
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Affiliation(s)
- Xiaofei Liang
- First author: State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University; and second author: Department of Plant Pathology, University of Florida, P.O. Box 110680, Gainesville 32611-0680
| | - Jeffrey A Rollins
- First author: State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University; and second author: Department of Plant Pathology, University of Florida, P.O. Box 110680, Gainesville 32611-0680
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Koh KX, Tan GH, Hui Low SH, Mohd Omar MF, Han MJ, Iacopetta B, Soo R, Beloueche-Babari M, Bhattacharya B, Soong R. Acquired resistance to PI3K/mTOR inhibition is associated with mitochondrial DNA mutation and glycolysis. Oncotarget 2017; 8:110133-110144. [PMID: 29299135 PMCID: PMC5746370 DOI: 10.18632/oncotarget.22655] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 10/27/2017] [Indexed: 01/31/2023] Open
Abstract
Acquired resistance (AQR) to drug treatment occurs frequently in cancer patients and remains an impediment to successful therapy. The aim of this study was to gain insight into how AQR arises following the application of PI3K/mTOR inhibitors. H1975 lung cancer cells with EGFR T790M mutations that confer resistance to EGFR inhibitors underwent prolonged treatment with the PI3K/mTOR inhibitor, BEZ235. Monoclonal cells with stable and increased resistance to BEZ235 were obtained after 8 months treatment. These AQR clones showed class-specific resistance to PI3K/mTOR inhibitors, reduced G1 cell cycle arrest and impedance of migration following PI3K/mTOR inhibition, reduced PTEN expression and increased Akt and S6RP phosphorylation. Transcriptome analysis revealed the AQR clones had increased expression of the metabolite transporters SLC16A9 and SLC16A7, suggestive of altered cell metabolism. Subsequent experiments revealed that AQR clones possess features consistent with elevated glycolysis, including increased levels of glucose, lactate, glutamine, glucose dependence, GLUT1 expression, and rates of post-glucose extracellular acidification, and decreased levels of reactive oxygen species and rates of oxygen consumption. Combination treatment of BEZ235 with the glycolysis inhibitor 3-bromopyruvate was synergistic in AQR clones, but only additive in parental cells. DNA sequencing revealed the presence of a mitochondrial DNA (mtDNA) MT-C01 variant in AQR but not parental cells. Depletion of mitochondrial DNA in parental cells induced resistance to BEZ235 and other PI3K/mTOR inhibitors, and was accompanied by increased glycolysis. The results of this study provide the first evidence that a metabolic switch associated with mtDNA mutation can be an underlying mechanism for AQR.
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Affiliation(s)
- King Xin Koh
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Gim Hwa Tan
- Department of Haematology Oncology, National University Cancer Institute of Singapore, Singapore, Singapore
| | - Sarah Hong Hui Low
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Mohd Feroz Mohd Omar
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Min Ji Han
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Barry Iacopetta
- School of Biomedical Sciences, The University of Western Australia, Perth, Australia
| | - Ross Soo
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
- Department of Haematology Oncology, National University Cancer Institute of Singapore, Singapore, Singapore
| | - Mounia Beloueche-Babari
- Division of Radiotherapy and Imaging, The Institute of Cancer Research and Royal Marsden NHS Foundation Trust, Sutton, United Kingdom
| | - Bhaskar Bhattacharya
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Richie Soong
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
- Department of Pathology, National University of Singapore, Singapore, Singapore
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Novak M, Lah L, Šala M, Stojan J, Bohlmann J, Komel R. Oleic acid metabolism via a conserved cytochrome P450 system-mediated ω-hydroxylation in the bark beetle-associated fungus Grosmannia clavigera. PLoS One 2015; 10:e0120119. [PMID: 25794012 PMCID: PMC4368105 DOI: 10.1371/journal.pone.0120119] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 01/22/2015] [Indexed: 12/27/2022] Open
Abstract
The bark beetle-associated fungus Grosmannia clavigera participates in the large-scale destruction of pine forests. In the tree, it must tolerate saturating levels of toxic conifer defense chemicals (e.g. monoterpenes). The fungus can metabolize some of these compounds through the ß-oxidation pathway and use them as a source of carbon. It also uses carbon from pine triglycerides, where oleic acid is the most common fatty acid. High levels of free fatty acids, however, are toxic and can cause additional stress during host colonization. Fatty acids induce expression of neighboring genes encoding a cytochrome P450 (CYP630B18) and its redox partner, cytochrome P450 reductase (CPR2). The aim of this work was to study the function of this novel P450 system. Using LC/MS, we biochemically characterized CYP630 as a highly specific oleic acid ω-hydroxylase. We explain oleic acid specificity using protein interaction modeling. Our results underscore the importance of ω-oxidation when the main ß-oxidation pathway may be overwhelmed by other substrates such as host terpenoid compounds. Because this CYP-CPR gene cluster is evolutionarily conserved, our work has implications for metabolism studies in other fungi.
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Affiliation(s)
- Metka Novak
- National Institute of Chemistry, Hajdrihova 19, SI-1000, Ljubljana, Slovenia
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Ljerka Lah
- National Institute of Chemistry, Hajdrihova 19, SI-1000, Ljubljana, Slovenia
- * E-mail: (LL); (RK)
| | - Martin Šala
- National Institute of Chemistry, Hajdrihova 19, SI-1000, Ljubljana, Slovenia
| | - Jure Stojan
- Institute of Biochemistry, Faculty of Medicine, University of Ljubljana, Vrazov trg 2, SI-1000, Ljubljana, Slovenia
| | - Joerg Bohlmann
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Radovan Komel
- National Institute of Chemistry, Hajdrihova 19, SI-1000, Ljubljana, Slovenia
- * E-mail: (LL); (RK)
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Sá-Pessoa J, Amillis S, Casal M, Diallinas G. Expression and specificity profile of the major acetate transporter AcpA in Aspergillus nidulans. Fungal Genet Biol 2015; 76:93-103. [PMID: 25708319 DOI: 10.1016/j.fgb.2015.02.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 02/06/2015] [Accepted: 02/10/2015] [Indexed: 12/27/2022]
Abstract
AcpA has been previously characterized as a high-affinity transporter essential for the uptake and use of acetate as sole carbon source in Aspergillus nidulans. Here, we follow the expression profile of AcpA and define its substrate specificity. AcpA-mediated acetate transport is detected from the onset of conidiospore germination, peaks at the time of germ tube emergence, and drops to low basal levels in germlings and young mycelia, where a second acetate transporter is also becoming apparent. AcpA activity also responds to acetate presence in the growth medium, but is not subject to either carbon or nitrogen catabolite repression. Short-chain monocarboxylates (benzoate, formate, butyrate and propionate) inhibit AcpA-mediated acetate transport with apparent inhibition constants (Ki) of 16.89±2.12, 9.25±1.01, 12.06±3.29 and 1.44±0.13mM, respectively. AcpA is also shown not to be directly involved in ammonia export, as proposed for its Saccharomyces cerevisiae homologue Ady2p. In the second part of this work, we search for the unknown acetate transporter expressed in mycelia, and for other transporters that might contribute to acetate uptake. In silico analysis, genetic construction of relevant null mutants, and uptake assays, reveal that the closest AcpA homologue (AN1839), named AcpB, is the 'missing' secondary acetate transporter in mycelia. We also identify two major short-chain carboxylate (lactate, succinate, pyruvate and malate) transporters, named JenA (AN6095) and JenB (AN6703), which however are not involved in acetate uptake. This work establishes a framework for further exploiting acetate and carboxylate transport in filamentous ascomycetes.
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Affiliation(s)
- Joana Sá-Pessoa
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, Braga 4710-057, Portugal
| | - Sotiris Amillis
- Faculty of Biology, Department of Botany, University of Athens, Panepistimioupolis, Athens 15781, Greece
| | - Margarida Casal
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, Braga 4710-057, Portugal.
| | - George Diallinas
- Faculty of Biology, Department of Botany, University of Athens, Panepistimioupolis, Athens 15781, Greece.
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Flipphi M, Oestreicher N, Nicolas V, Guitton A, Vélot C. The Aspergillus nidulans acuL gene encodes a mitochondrial carrier required for the utilization of carbon sources that are metabolized via the TCA cycle. Fungal Genet Biol 2014; 68:9-22. [DOI: 10.1016/j.fgb.2014.04.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Revised: 04/24/2014] [Accepted: 04/29/2014] [Indexed: 10/25/2022]
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Zhou J, Yeung YY. Synthesis of Reboxetine Intermediate and Carnitine Acetyltransferase Inhibitor via NBS-Induced Electrophilic Multicomponent Reaction. J Org Chem 2014; 79:4644-9. [DOI: 10.1021/jo500609a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Jing Zhou
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Ying-Yeung Yeung
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
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Otzen C, Bardl B, Jacobsen ID, Nett M, Brock M. Candida albicans utilizes a modified β-oxidation pathway for the degradation of toxic propionyl-CoA. J Biol Chem 2014; 289:8151-69. [PMID: 24497638 DOI: 10.1074/jbc.m113.517672] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Propionyl-CoA arises as a metabolic intermediate from the degradation of propionate, odd-chain fatty acids, and some amino acids. Thus, pathways for catabolism of this intermediate have evolved in all kingdoms of life, preventing the accumulation of toxic propionyl-CoA concentrations. Previous studies have shown that fungi generally use the methyl citrate cycle for propionyl-CoA degradation. Here, we show that this is not the case for the pathogenic fungus Candida albicans despite its ability to use propionate and valerate as carbon sources. Comparative proteome analyses suggested the presence of a modified β-oxidation pathway with the key intermediate 3-hydroxypropionate. Gene deletion analyses confirmed that the enoyl-CoA hydratase/dehydrogenase Fox2p, the putative 3-hydroxypropionyl-CoA hydrolase Ehd3p, the 3-hydroxypropionate dehydrogenase Hpd1p, and the putative malonate semialdehyde dehydrogenase Ald6p essentially contribute to propionyl-CoA degradation and its conversion to acetyl-CoA. The function of Hpd1p was further supported by the detection of accumulating 3-hydroxypropionate in the hpd1 mutant on propionyl-CoA-generating nutrients. Substrate specificity of Hpd1p was determined from recombinant purified enzyme, which revealed a preference for 3-hydroxypropionate, although serine and 3-hydroxyisobutyrate could also serve as substrates. Finally, virulence studies in a murine sepsis model revealed attenuated virulence of the hpd1 mutant, which indicates generation of propionyl-CoA from host-provided nutrients during infection.
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Peraza-Reyes L, Berteaux-Lecellier V. Peroxisomes and sexual development in fungi. Front Physiol 2013; 4:244. [PMID: 24046747 PMCID: PMC3764329 DOI: 10.3389/fphys.2013.00244] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2013] [Accepted: 08/19/2013] [Indexed: 11/13/2022] Open
Abstract
Peroxisomes are versatile and dynamic organelles that are essential for the development of most eukaryotic organisms. In fungi, many developmental processes, such as sexual development, require the activity of peroxisomes. Sexual reproduction in fungi involves the formation of meiotic-derived sexual spores, often takes place inside multicellular fruiting bodies and requires precise coordination between the differentiation of multiple cell types and the progression of karyogamy and meiosis. Different peroxisomal functions contribute to the orchestration of this complex developmental process. Peroxisomes are required to sustain the formation of fruiting bodies and the maturation and germination of sexual spores. They facilitate the mobilization of reserve compounds via fatty acid β-oxidation and the glyoxylate cycle, allowing the generation of energy and biosynthetic precursors. Additionally, peroxisomes are implicated in the progression of meiotic development. During meiotic development in Podospora anserina, there is a precise modulation of peroxisome assembly and dynamics. This modulation includes changes in peroxisome size, number and localization, and involves a differential activity of the protein-machinery that drives the import of proteins into peroxisomes. Furthermore, karyogamy, entry into meiosis and sorting of meiotic-derived nuclei into sexual spores all require the activity of peroxisomes. These processes rely on different peroxisomal functions and likely depend on different pathways for peroxisome assembly. Indeed, emerging studies support the existence of distinct import channels for peroxisomal proteins that contribute to different developmental stages.
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Affiliation(s)
- Leonardo Peraza-Reyes
- CNRS, Institut de Génétique et Microbiologie, University Paris-Sud, UMR8621 Orsay, France
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Mahajabeen P, Chadha A. A novel green route for the synthesis of N-phenylacetamides, benzimidazoles and acridinediones using Candida parapsilosis ATCC 7330. RSC Adv 2013. [DOI: 10.1039/c3ra44058c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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Son H, Min K, Lee J, Choi GJ, Kim JC, Lee YW. Mitochondrial carnitine-dependent acetyl coenzyme A transport is required for normal sexual and asexual development of the ascomycete Gibberella zeae. EUKARYOTIC CELL 2012; 11:1143-53. [PMID: 22798392 PMCID: PMC3445975 DOI: 10.1128/ec.00104-12] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Accepted: 07/06/2012] [Indexed: 11/20/2022]
Abstract
Fungi have evolved efficient metabolic mechanisms for the exact temporal (developmental stages) and spatial (organelles) production of acetyl coenzyme A (acetyl-CoA). We previously demonstrated mechanistic roles of several acetyl-CoA synthetic enzymes, namely, ATP citrate lyase and acetyl-CoA synthetases (ACSs), in the plant-pathogenic fungus Gibberella zeae. In this study, we characterized two carnitine acetyltransferases (CATs; CAT1 and CAT2) to obtain a better understanding of the metabolic processes occurring in G. zeae. We found that CAT1 functioned as an alternative source of acetyl-CoA required for lipid accumulation in an ACS1 deletion mutant. Moreover, deletion of CAT1 and/or CAT2 resulted in various defects, including changes to vegetative growth, asexual/sexual development, trichothecene production, and virulence. Although CAT1 is associated primarily with peroxisomal CAT function, mislocalization experiments showed that the role of CAT1 in acetyl-CoA transport between the mitochondria and cytosol is important for sexual and asexual development in G. zeae. Taking these data together, we concluded that G. zeae CATs are responsible for facilitating the exchange of acetyl-CoA across intracellular membranes, particularly between the mitochondria and the cytosol, during various developmental stages.
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Affiliation(s)
- Hokyoung Son
- Department of Agricultural Biotechnology and Center for Fungal Pathogenesis, Seoul National University, Seoul, Republic of Korea
| | - Kyunghun Min
- Department of Agricultural Biotechnology and Center for Fungal Pathogenesis, Seoul National University, Seoul, Republic of Korea
| | - Jungkwan Lee
- Department of Applied Biology, Dong-A University, Busan, Republic of Korea
| | - Gyung Ja Choi
- Eco-Friendly New Materials Research Group, Research Center for Biobased Chemistry, Division of Convergence Chemistry, Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea
| | - Jin-Cheol Kim
- Eco-Friendly New Materials Research Group, Research Center for Biobased Chemistry, Division of Convergence Chemistry, Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea
| | - Yin-Won Lee
- Department of Agricultural Biotechnology and Center for Fungal Pathogenesis, Seoul National University, Seoul, Republic of Korea
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Zhao G, Hou L, Yao Y, Wang C, Cao X. Comparative proteome analysis of Aspergillus oryzae 3.042 and A. oryzae 100–8 strains: Towards the production of different soy sauce flavors. J Proteomics 2012; 75:3914-24. [DOI: 10.1016/j.jprot.2012.04.056] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Revised: 04/28/2012] [Accepted: 04/28/2012] [Indexed: 01/08/2023]
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Suzuki Y, Murray SL, Wong KH, Davis MA, Hynes MJ. Reprogramming of carbon metabolism by the transcriptional activators AcuK and AcuM in Aspergillus nidulans. Mol Microbiol 2012; 84:942-64. [DOI: 10.1111/j.1365-2958.2012.08067.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Brown DW, Butchko RAE, Baker SE, Proctor RH. Phylogenomic and functional domain analysis of polyketide synthases in Fusarium. Fungal Biol 2011; 116:318-31. [PMID: 22289777 DOI: 10.1016/j.funbio.2011.12.005] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Revised: 12/09/2011] [Accepted: 12/10/2011] [Indexed: 12/15/2022]
Abstract
Fusarium species are ubiquitous in nature, cause a range of plant diseases, and produce a variety of chemicals often referred to as secondary metabolites. Although some fungal secondary metabolites affect plant growth or protect plants from other fungi and bacteria, their presence in grain-based food and feed is more often associated with a variety of diseases in plants and in animals. Many of these structurally diverse metabolites are derived from a family of related enzymes called polyketide synthases (PKSs). A search of genomic sequence of Fusarium verticillioides, Fusarium graminearum, Fusarium oxysporum, and Fusarium solani identified a total of 58 PKS genes. To gain insight into how this gene family evolved and to guide future studies, we conducted phylogenomic and functional domain analyses. The resulting geneaology suggested that Fusarium PKSs represent 34 different groups responsible for synthesis of different core metabolites. The analyses indicate that variation in the Fusarium PKS gene family is due to gene duplication and loss events as well as enzyme gain-of-function due to the acquisition of new domains or of loss-of-function due to nucleotide mutations. Transcriptional analysis indicates that the 16 F. verticillioides PKS genes are expressed under a range of conditions, further evidence that they are functional genes that confer the ability to produce secondary metabolites.
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Affiliation(s)
- Daren W Brown
- Bacterial Foodborne Pathogens and Mycology Research, USDA-ARS-NCAUR, Peoria, Illinois 61604, USA.
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