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https://www.readbyqxmd.com/read/29610761/impact-of-f1fo-atp-synthase-dimer-assembly-factors-on-mitochondrial-function-and-organismic-aging
#1
Nadia G Rampello, Maria Stenger, Benedikt Westermann, Heinz D Osiewacz
In aerobic organisms, mitochondrial F1 Fo -ATP-synthase is the major site of ATP production. Beside this fundamental role, the protein complex is involved in shaping and maintenance of cristae. Previous electron microscopic studies identified the dissociation of F1 Fo -ATP-synthase dimers and oligomers during organismic aging correlating with a massive remodeling of the mitochondrial inner membrane. Here we report results aimed to experimentally proof this impact and to obtain further insights into the control of these processes...
January 30, 2018: Microbial Cell
https://www.readbyqxmd.com/read/29463729/nlr-surveillance-of-essential-sec-9-snare-proteins-induces-programmed-cell-death-upon-allorecognition-in-filamentous-fungi
#2
Jens Heller, Corinne Clavé, Pierre Gladieux, Sven J Saupe, N Louise Glass
In plants and metazoans, intracellular receptors that belong to the NOD-like receptor (NLR) family are major contributors to innate immunity. Filamentous fungal genomes contain large repertoires of genes encoding for proteins with similar architecture to plant and animal NLRs with mostly unknown function. Here, we identify and molecularly characterize patatin-like phospholipase-1 (PLP-1), an NLR-like protein containing an N-terminal patatin-like phospholipase domain, a nucleotide-binding domain (NBD), and a C-terminal tetratricopeptide repeat (TPR) domain...
March 6, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29366759/a-senescence-delaying-pre-culture-medium-for-transcriptomics-of-podospora-anserina
#3
Tiziano Benocci, Ronald P de Vries, Paul Daly
Podospora anserina is an efficient degrader of recalcitrant plant biomass but senesces quickly on most standard pre-culturing media. Among nine pre-culture media, sufficient growth without senescence was only observed on Luria-Bertani medium. The high quality RNA obtained from subsequent transfer cultures was suitable for transcriptomics.
March 2018: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/29352863/a-chitin-deacetylase-of-podospora-anserina-has-two-functional-chitin-binding-domains-and-a-unique-mode-of-action
#4
Janina Hoßbach, Franziska Bußwinkel, Andreas Kranz, Jasper Wattjes, Stefan Cord-Landwehr, Bruno M Moerschbacher
Chitosan is a structurally diverse biopolymer that is commercially derived from chitin by chemical processing, but chitin deacetylases (CDAs) potentially offer a sustainable and more controllable approach allowing the production of chitosans with tailored structures and biological activities. We investigated the CDA from Podospora anserina (PaCDA) which is closely related to Colletotrichum lindemuthianum CDA in the catalytic domain, but unique in having two chitin-binding domains. We produced recombinant PaCDA in Hansenula polymorpha for biochemical characterization and found that the catalytic domain of PaCDA is also functionally similar to C...
March 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29259205/action-of-lytic-polysaccharide-monooxygenase-on-plant-tissue-is-governed-by-cellular-type
#5
Brigitte Chabbert, Anouck Habrant, Mickaël Herbaut, Laurence Foulon, Véronique Aguié-Béghin, Sona Garajova, Sacha Grisel, Chloé Bennati-Granier, Isabelle Gimbert-Herpoël, Frédéric Jamme, Matthieu Réfrégiers, Christophe Sandt, Jean-Guy Berrin, Gabriel Paës
Lignocellulosic biomass bioconversion is hampered by the structural and chemical complexity of the network created by cellulose, hemicellulose and lignin. Biological conversion of lignocellulose involves synergistic action of a large array of enzymes including the recently discovered lytic polysaccharide monooxygenases (LPMOs) that perform oxidative cleavage of cellulose. Using in situ imaging by synchrotron UV fluorescence, we have shown that the addition of AA9 LPMO (from Podospora anserina) to cellulases cocktail improves the progression of enzymes in delignified Miscanthus x giganteus as observed at tissular levels...
December 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28919882/effects-of-soil-pre-treatment-with-basamid%C3%A2-granules-brassica-juncea-raphanus-sativus-and-tagetes-patula-on-bacterial-and-fungal-communities-at-two-apple-replant-disease-sites
#6
Bunlong Yim, Heike Nitt, Andreas Wrede, Samuel Jacquiod, Søren J Sørensen, Traud Winkelmann, Kornelia Smalla
Nurseries producing apple and rose rootstock plants, apple orchards as well as rose production often experience replanting problems after several cultivations at the same site when a chemical soil disinfectant is not applied. The etiology of apple and rose replanting problems is most likely caused by soil-borne pathogen complex, defined as "replant disease (RD)". Symptoms typical of RD are reduced shoot and root growth, a smaller leaf area, a significant decrease in plant biomass, yield and fruit quality and a shorter life span...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28684269/a-novel-role-of-the-mitochondrial-permeability-transition-pore-in-gossypol-induced-mitochondrial-dysfunction
#7
Verena Warnsmann, Nina Meyer, Andrea Hamann, Donat Kögel, Heinz D Osiewacz
Gossypol, a natural polyphenolic compound from cotton seeds, is known to trigger different forms of cell death in various types of cancer. Gossypol acts as a Bcl-2 inhibitor that induces apoptosis in apoptosis-competent cells. In apoptosis-resistant cancers such as glioblastoma, it triggers a non-apoptotic type of cell death associated with increased oxidative stress, mitochondrial depolarisation and fragmentation. In order to investigate the impact of gossypol on mitochondrial function, the mitochondrial permeability transition pore and on oxidative stress in more detail, we used the aging model Podospora anserina that lacks endogenous Bcl-2 proteins...
July 3, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28629791/inositol-phosphate-signaling-as-mediator-for-growth-and-sexual-reproduction-in-podospora-anserina
#8
Ning Xie, Gwenaël Ruprich-Robert, Florence Chapeland-Leclerc, Evelyne Coppin, Hervé Lalucque, Sylvain Brun, Robert Debuchy, Philippe Silar
The molecular pathways involved in the development of multicellular fruiting bodies in fungi are still not well known. Especially, the interplay between the mycelium, the female tissues and the zygotic tissues of the fruiting bodies is poorly documented. Here, we describe PM154, a new strain of the model ascomycetes Podospora anserina able to mate with itself and that enabled the easy recovery of new mutants affected in fruiting body development. By complete genome sequencing of spod1, one of the new mutants, we identified an inositol phosphate polykinase gene as essential, especially for fruiting body development...
September 1, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28449241/autophagy-compensates-impaired-energy-metabolism-in-clpxp-deficient-podospora-anserina-strains-and-extends-healthspan
#9
Laura Knuppertz, Heinz D Osiewacz
The degradation of nonfunctional mitochondrial proteins is of fundamental relevance for maintenance of cellular homeostasis. The heteromeric CLPXP protein complex in the mitochondrial matrix is part of this process. In the fungal aging model Podospora anserina, ablation of CLPXP leads to an increase in healthy lifespan. Here, we report that this counterintuitive increase depends on a functional autophagy machinery. In PaClpXP mutants, autophagy is involved in energy conservation and the compensation of impairments in respiration...
August 2017: Aging Cell
https://www.readbyqxmd.com/read/28406433/diversity-of-amyloid-motifs-in-nlr-signaling-in-fungi
#10
REVIEW
Antoine Loquet, Sven J Saupe
Amyloid folds not only represent the underlying cause of a large class of human diseases but also display a variety of functional roles both in prokaryote and eukaryote organisms. Among these roles is a recently-described activity in signal transduction cascades functioning in host defense and programmed cell death and involving Nod-like receptors (NLRs). In different fungal species, prion amyloid folds convey activation signals from a receptor protein to an effector domain by an amyloid templating and propagation mechanism...
April 13, 2017: Biomolecules
https://www.readbyqxmd.com/read/28368682/stress-dependent-opposing-roles-for-mitophagy-in-aging-of-the-ascomycete-podospora-anserina
#11
Laura Knuppertz, Verena Warnsmann, Andrea Hamann, Carolin Grimm, Heinz D Osiewacz
Mitochondrial dysfunction is causatively linked to organismal aging and the development of degenerative diseases. Here we describe stress-dependent opposing roles of mitophagy, the selective autophagic degradation of mitochondria, in aging and life-span control. We report that the ablation of the mitochondrial superoxide dismutase which is involved in reactive oxygen species (ROS) balancing, does not affect life span of the fungal aging model Podospora anserina, although superoxide levels are strongly increased and complex I-dependent respiration is impaired...
June 3, 2017: Autophagy
https://www.readbyqxmd.com/read/28347269/the-autophagy-interaction-network-of-the-aging-model-podospora-anserina
#12
Oliver Philipp, Andrea Hamann, Heinz D Osiewacz, Ina Koch
BACKGROUND: Autophagy is a conserved molecular pathway involved in the degradation and recycling of cellular components. It is active either as response to starvation or molecular damage. Evidence is emerging that autophagy plays a key role in the degradation of damaged cellular components and thereby affects aging and lifespan control. In earlier studies, it was found that autophagy in the aging model Podospora anserina acts as a longevity assurance mechanism. However, only little is known about the individual components controlling autophagy in this aging model...
March 27, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28324599/three-dimensional-live-imaging-of-filamentous-fungi-with-light-sheet-based-fluorescence-microscopy-lsfm
#13
Francesco Pampaloni, Laura Knuppertz, Andrea Hamann, Heinz D Osiewacz, Ernst H K Stelzer
We describe a method for the three-dimensional live imaging of filamentous fungi with light sheet-based fluorescence microscopy (LSFM). LSFM provides completely new opportunities to investigate the biology of fungal cells and other microorganisms with high spatial and temporal resolution. As an example, we study the established aging model Podospora anserina. The protocol explains the mounting of the live fungi for the light sheet imaging, the imaging procedure and illustrates basic image processing of data...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28293293/the-podospora-anserina-lytic-polysaccharide-monooxygenase-palpmo9h-catalyzes-oxidative-cleavage-of-diverse-plant-cell-wall-matrix-glycans
#14
Mathieu Fanuel, Sona Garajova, David Ropartz, Nicholas McGregor, Harry Brumer, Hélène Rogniaux, Jean-Guy Berrin
BACKGROUND: The enzymatic conversion of plant biomass has been recently revolutionized by the discovery of lytic polysaccharide monooxygenases (LPMO) that catalyze oxidative cleavage of polysaccharides. These powerful enzymes are secreted by a large number of fungal saprotrophs and are important components of commercial enzyme cocktails used for industrial biomass conversion. Among the 33 AA9 LPMOs encoded by the genome of Podospora anserina, the PaLPMO9H enzyme catalyzes mixed C1/C4 oxidative cleavage of cellulose and cello-oligosaccharides...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28191457/the-copper-transport-associated-protein-ctr4-can-form-prion-like-epigenetic-determinants-in-schizosaccharomyces-pombe
#15
Theodora Sideri, Yoko Yashiroda, David A Ellis, María Rodríguez-López, Minoru Yoshida, Mick F Tuite, Jürg Bähler
Prions are protein-based infectious entities associated with fatal brain diseases in animals, but also modify a range of host-cell phenotypes in the budding yeast, Saccharomyces cerevisiae. Many questions remain about the evolution and biology of prions. Although several functionally distinct prion-forming proteins exist in S. cerevisiae, [HET-s] of Podospora anserina is the only other known fungal prion. Here we investigated prion-like, protein-based epigenetic transmission in the fission yeast Schizosaccharomyces pombe...
January 2017: Microbial Cell
https://www.readbyqxmd.com/read/28188936/cultivation-of-podospora-anserina-on-soybean-hulls-results-in-an-efficient-enzyme-cocktail-for-plant-biomass-hydrolysis
#16
Miia R Mäkelä, Ourdia Bouzid, Diogo Robl, Harm Post, Mao Peng, Albert Heck, Maarten Altelaar, Ronald P de Vries
The coprophilic ascomycete fungus Podospora anserina was cultivated on three different plant biomasses, i.e. cotton seed hulls (CSH), soybean hulls (SBH) and acid-pretreated wheat straw (WS) for four days, and the potential of the produced enzyme mixtures was compared in the enzymatic saccharification of the corresponding lignocellulose feedstocks. The enzyme cocktail P. anserina produced after three days of growth on SBH showed superior capacity to release reducing sugars from all tested plant biomass feedstocks compared to the enzyme mixtures from CSH and WS cultures...
July 25, 2017: New Biotechnology
https://www.readbyqxmd.com/read/28027291/interaction-of-prions-causes-heritable-traits-in-saccharomyces-cerevisiae
#17
Anton A Nizhnikov, Tatyana A Ryzhova, Kirill V Volkov, Sergey P Zadorsky, Julia V Sopova, Sergey G Inge-Vechtomov, Alexey P Galkin
The concept of "protein-based inheritance" defines prions as epigenetic determinants that cause several heritable traits in eukaryotic microorganisms, such as Saccharomyces cerevisiae and Podospora anserina. Previously, we discovered a non-chromosomal factor, [NSI+], which possesses the main features of yeast prions, including cytoplasmic infectivity, reversible curability, dominance, and non-Mendelian inheritance in meiosis. This factor causes omnipotent suppression of nonsense mutations in strains of S. cerevisiae bearing a deleted or modified Sup35 N-terminal domain...
December 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27979655/idc2-and-idc3-two-genes-involved-in-cell-non-autonomous-signaling-of-fruiting-body-development-in-the-model-fungus-podospora-anserina
#18
Hervé Lalucque, Fabienne Malagnac, Kimberly Green, Valérie Gautier, Pierre Grognet, Laetitia Chan Ho Tong, Barry Scott, Philippe Silar
Filamentous ascomycetes produce complex multicellular structures during sexual reproduction. Little is known about the genetic pathways enabling the construction of such structures. Here, with a combination of classical and reverse genetic methods, as well as genetic mosaic and graft analyses, we identify and provide evidence for key roles for two genes during the formation of perithecia, the sexual fruiting bodies, of the filamentous fungus Podospora anserina. Data indicate that the proteins coded by these two genes function cell-non-autonomously and that their activity depends upon conserved cysteines, making them good candidate for being involved in the transmission of a reactive oxygen species (ROS) signal generated by the PaNox1 NADPH oxidase inside the maturing fruiting body towards the PaMpk1 MAP kinase, which is located inside the underlying mycelium, in which nutrients are stored...
January 15, 2017: Developmental Biology
https://www.readbyqxmd.com/read/27882646/symb-and-symc-two-membrane-associated-proteins-are-required-for-epichlo%C3%A3-festucae-hyphal-cell-cell-fusion-and-maintenance-of-a-mutualistic-interaction-with-lolium-perenne
#19
Kimberly A Green, Yvonne Becker, Aiko Tanaka, Daigo Takemoto, Helen L Fitzsimons, Stephan Seiler, Hervé Lalucque, Philippe Silar, Barry Scott
Cell-cell fusion in fungi is required for colony formation, nutrient transfer and signal transduction. Disruption of genes required for hyphal fusion in Epichloë festucae, a mutualistic symbiont of Lolium grasses, severely disrupts the host interaction phenotype. They examined whether symB and symC, the E. festucae homologs of Podospora anserina self-signaling genes IDC2 and IDC3, are required for E. festucae hyphal fusion and host symbiosis. Deletion mutants of these genes were defective in hyphal cell fusion, formed intra-hyphal hyphae, and had enhanced conidiation...
February 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/27836848/inactivation-of-cellobiose-dehydrogenases-modifies-the-cellulose-degradation-mechanism-of-podospora-anserina
#20
Narumon Tangthirasunun, David Navarro, Sona Garajova, Didier Chevret, Laetitia Chan Ho Tong, Valérie Gautier, Kevin D Hyde, Philippe Silar, Jean-Guy Berrin
Conversion of biomass into high-value products, including biofuels, is of great interest to developing sustainable biorefineries. Fungi are an inexhaustible source of enzymes to degrade plant biomass. Cellobiose dehydrogenases (CDHs) play an important role in the breakdown through synergistic action with fungal lytic polysaccharide monooxygenases (LPMOs). The three CDH genes of the model fungus Podospora anserina were inactivated, resulting in single and multiple CDH mutants. We detected almost no difference in growth and fertility of the mutants on various lignocellulose sources, except on crystalline cellulose, on which a 2-fold decrease in fertility of the mutants lacking P...
January 15, 2017: Applied and Environmental Microbiology
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