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fungi secreted protein

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https://www.readbyqxmd.com/read/27884087/a-protease-peptidase-from-culture-medium-of-flammulina-velutipes-that-acts-on-arabinogalactan-protein
#1
Yoshihisa Yoshimi, Yumi Sugawara, Chiaki Hori, Kiyohiko Igarashi, Satoshi Kaneko, Yoichi Tsumuraya, Toshihisa Kotake
Arabinogalactan-proteins (AGPs) are highly diverse plant proteoglycans found on the plant cell surface. AGPs have large arabinogalactan (AG) moieties attached to a core-protein rich in hydroxyproline (Hyp). The AG undergoes hydrolysis by various glycoside hydrolases, most of which have been identified, whereas the core-proteins is presumably degraded by unknown proteases/peptidases secreted from fungi and bacteria in nature. Although several enzymes hydrolyzing other Hyp-rich proteins are known, the enzymes acting on the core-proteins of AGPs remain to be identified...
November 25, 2016: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/27876784/expression-and-characterization-of-a-talaromyces-marneffei-active-phospholipase-b-expressed-in-a-pichia-pastoris-expression-system
#2
Yan He, Linghua Li, Fengyu Hu, Wanshan Chen, Huali Lei, Xiejie Chen, Weiping Cai, Xiaoping Tang
Phospholipase B is a virulence factor for several clinically important pathogenic fungi, including Candida albicans, Cryptococcus neoformans and Aspergillus fumigatus, but its role in the thermally dimorphic fungus Talaromyces marneffei remains unclear. Here, we provide the first report of the expression of a novel phospholipase gene, designated TmPlb1, from T. marneffei in the eukaryotic expression system of Pichia pastoris GS115. Sensitive real-time quantitative reverse-transcription PCR (qRT-PCR) demonstrated that the expression of TmPlb1 increased 1...
November 23, 2016: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/27868319/infection-assays-in-arabidopsis-reveal-candidate-effectors-from-the-poplar-rust-fungus-that-promote-susceptibility-to-bacteria-and-oomycete-pathogens
#3
Hugo Germain, David L Joly, Caroline Mireault, Mélodie B Plourde, Claire Letanneur, Donald Stewart, Marie-Josée Morency, Benjamin Petre, Sébastien Duplessis, Armand Séguin
Fungi of the Pucciniales order cause rust diseases, which altogether affect thousands of plant species worldwide and pose major threat to several crops. How rust effectors - virulence proteins delivered into infected tissues to modulate host functions - contribute to pathogen virulence remains poorly understood. Melampsora larici-populina is a devastating and widespread rust pathogen of poplars and its genome encodes 1,184 identified small secreted proteins that could potentially act as effectors. Here, following specific criteria we selected 16 candidate effector proteins and characterized their virulence activities and subcellular localizations in the leaf cells of Arabidopsis thaliana...
November 21, 2016: Molecular Plant Pathology
https://www.readbyqxmd.com/read/27855158/high-resolution-genetics-identifies-the-lipid-transfer-protein-sec14p-as-target-for-antifungal-ergolines
#4
Ireos Filipuzzi, Simona Cotesta, Francesca Perruccio, Britta Knapp, Yue Fu, Christian Studer, Verena Pries, Ralph Riedl, Stephen B Helliwell, Katarina T Petrovic, N Rao Movva, Dominique Sanglard, Jianshi Tao, Dominic Hoepfner
Invasive infections by fungal pathogens cause more deaths than malaria worldwide. We found the ergoline compound NGx04 in an antifungal screen, with selectivity over mammalian cells. High-resolution chemogenomics identified the lipid transfer protein Sec14p as the target of NGx04 and compound-resistant mutations in Sec14p define compound-target interactions in the substrate binding pocket of the protein. Beyond its essential lipid transfer function in a variety of pathogenic fungi, Sec14p is also involved in secretion of virulence determinants essential for the pathogenicity of fungi such as Cryptococcus neoformans, making Sec14p an attractive antifungal target...
November 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27853454/comparative-analysis-of-secretomes-from-ectomycorrhizal-fungi-with-an-emphasis-on-small-secreted-proteins
#5
COMMENT
Kevin Garcia, Jean-Michel Ané
No abstract text is available yet for this article.
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27836848/investigation-of-the-role-played-by-cellobiose-dehydrogenases-from-podospora-anserina-during-lignocellulose-degradation
#6
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 develop 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 singly and multiple CDH mutants. We detected almost no difference in the growth and fertility of the mutants on various lignocellulose sources, except on crystalline cellulose, where a two-fold decrease in fertility of the mutants lacking PaCDH1 and PaCDH2 was observed...
November 11, 2016: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/27809762/transcriptome-analysis-of-the-fungal-pathogen-fusarium-oxysporum-f-sp-medicaginis-during-colonisation-of-resistant-and-susceptible-medicago-truncatula-hosts-identifies-differential-pathogenicity-profiles-and-novel-candidate-effectors
#7
Louise F Thatcher, Angela H Williams, Gagan Garg, Sally-Anne G Buck, Karam B Singh
BACKGROUND: Pathogenic members of the Fusarium oxysporum species complex are responsible for vascular wilt disease on many important crops including legumes, where they can be one of the most destructive disease causing necrotrophic fungi. We previously developed a model legume-infecting pathosystem based on the reference legume Medicago truncatula and a pathogenic F. oxysporum forma specialis (f. sp.) medicaginis (Fom). To dissect the molecular pathogenicity arsenal used by this root-infecting pathogen, we sequenced its transcriptome during infection of a susceptible and resistant host accession...
November 3, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27790215/the-scavenger-receptor-ssc5d-physically-interacts-with-bacteria-through-the-srcr-containing-n-terminal-domain
#8
Catarina Bessa Pereira, Markéta Bocková, Rita F Santos, Ana Mafalda Santos, Mafalda Martins de Araújo, Liliana Oliveira, Jiří Homola, Alexandre M Carmo
The scavenger receptor cysteine-rich (SRCR) family comprises a group of membrane-attached or secreted proteins that contain one or more modules/domains structurally similar to the membrane distal domain of type I macrophage scavenger receptor. Although no all-inclusive biological function has been ascribed to the SRCR family, some of these receptors have been shown to recognize pathogen-associated molecular patterns (PAMP) of bacteria, fungi, or other microbes. SSc5D is a recently described soluble SRCR receptor produced by monocytes/macrophages and T lymphocytes, consisting of an N-terminal portion, which contains five SRCR modules, and a large C-terminal mucin-like domain...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27765697/comparative-study-of-two-single-crd-c-type-lectins-cgclec-4-and-cgclec-5-from-pacific-oyster-crassostrea-gigas
#9
Zhihao Jia, Huan Zhang, Shuai Jiang, Mengqiang Wang, Lingling Wang, Linsheng Song
C-type lectins (CTLs), a superfamily of Ca(2+)-dependent carbohydrate-recognition proteins, are involved in nonself-recognition and pathogen elimination, and play crucial roles in the innate immunity. In the present study, two single CRD C-type lectins, CgCLec-4 and CgCLec-5, were identified from oyster Crassostrea gigas. The open reading frame (ORF) of CgCLec-4 and CgCLec-5 encoded polypeptides of 152 and 150 amino acids, respectively. Both CgCLec-4 and CgCLec-5 contained one CRD with six conserved cysteines to form three disulfide bridges...
December 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27735938/loss-of-xiap-facilitates-switch-to-tnf%C3%AE-induced-necroptosis-in-mouse-neutrophils
#10
Simone Wicki, Ursina Gurzeler, W Wei-Lynn Wong, Philipp J Jost, Daniel Bachmann, Thomas Kaufmann
Neutrophils are essential players in the first-line defense against invading bacteria and fungi. Besides its antiapoptotic role, the inhibitor of apoptosis protein (IAP) family member X-linked IAP (XIAP) has been shown to regulate innate immune signaling. Whereas the role of XIAP in innate signaling pathways is derived mostly from work in macrophages and dendritic cells, it is not known if and how XIAP contributes to these pathways in neutrophils. Here we show that in response to bacterial lipopolysaccharides (LPS), mouse neutrophils secreted considerable amounts of tumor necrosis factor-α (TNFα) and interleukin-1β (IL-1β) and, in accordance with earlier reports, XIAP prevented LPS-induced hypersecretion of IL-1β also in neutrophils...
October 13, 2016: Cell Death & Disease
https://www.readbyqxmd.com/read/27711117/de-novo-analysis-of-the-epiphytic-transcriptome-of-the-cucurbit-powdery-mildew-fungus-podosphaera-xanthii-and-identification-of-candidate-secreted-effector-proteins
#11
David Vela-Corcía, Rocío Bautista, Antonio de Vicente, Pietro D Spanu, Alejandro Pérez-García
The cucurbit powdery mildew fungus Podosphaera xanthii is a major limiting factor for cucurbit production worldwide. Despite the fungus's agronomic and economic importance, very little is known about fundamental aspects of P. xanthii biology, such as obligate biotrophy or pathogenesis. To design more durable control strategies, genomic information about P. xanthii is needed. Powdery mildews are fungal pathogens with large genomes compared with those of other fungi, which contain vast amounts of repetitive DNA sequences, much of which is composed of retrotransposons...
2016: PloS One
https://www.readbyqxmd.com/read/27704050/genome-diversity-recombination-and-virulence-across-the-major-lineages-of-paracoccidioides
#12
José F Muñoz, Rhys A Farrer, Christopher A Desjardins, Juan E Gallo, Sean Sykes, Sharadha Sakthikumar, Elizabeth Misas, Emily A Whiston, Eduardo Bagagli, Celia M A Soares, Marcus de M Teixeira, John W Taylor, Oliver K Clay, Juan G McEwen, Christina A Cuomo
The Paracoccidioides genus includes two species of thermally dimorphic fungi that cause paracoccidioidomycosis, a neglected health-threatening human systemic mycosis endemic to Latin America. To examine the genome evolution and the diversity of Paracoccidioides spp., we conducted whole-genome sequencing of 31 isolates representing the phylogenetic, geographic, and ecological breadth of the genus. These samples included clinical, environmental and laboratory reference strains of the S1, PS2, PS3, and PS4 lineages of P...
September 2016: MSphere
https://www.readbyqxmd.com/read/27676173/a-small-cysteine-rich-protein-from-the-asian-soybean-rust-fungus-phakopsora-pachyrhizi-suppresses-plant-immunity
#13
Mingsheng Qi, Tobias I Link, Manuel Müller, Daniela Hirschburger, Ramesh N Pudake, Kerry F Pedley, Edward Braun, Ralf T Voegele, Thomas J Baum, Steven A Whitham
The Asian soybean rust fungus, Phakopsora pachyrhizi, is an obligate biotrophic pathogen causing severe soybean disease epidemics. Molecular mechanisms by which P. pachyrhizi and other rust fungi interact with their host plants are poorly understood. The genomes of all rust fungi encode many small, secreted cysteine-rich proteins (SSCRP). While these proteins are thought to function within the host, their roles are completely unknown. Here, we present the characterization of P. pachyrhizi effector candidate 23 (PpEC23), a SSCRP that we show to suppress plant immunity...
September 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27672660/functions-of-thga1-gene-in-trichoderma-harzianum-based-on-transcriptome-analysis
#14
Qing Sun, Xiliang Jiang, Li Pang, Lirong Wang, Mei Li
Trichoderma spp. are important biocontrol filamentous fungi, which are widely used for their adaptability, broad antimicrobial spectrum, and various antagonistic mechanisms. In our previous studies, we cloned thga1 gene encoding GαI protein from Trichoderma harzianum Th-33. Its knockout mutant showed that the growth rate, conidial yield, cAMP level, antagonistic action, and hydrophobicity decreased. Therefore, Illumina RNA-seq technology (RNA-seq) was used to determine transcriptomic differences between the wild-type strain and thga1 mutant...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27650297/endoplasmic-reticulum-derived-reactive-oxygen-species-ros-is-involved-in-toxicity-of-cell-wall-stress-to-candida-albicans
#15
Qilin Yu, Bing Zhang, Jianrong Li, Biao Zhang, Honggang Wang, Mingchun Li
The cell wall is an important cell structure in both fungi and bacteria, and hence becomes a common antimicrobial target. The cell wall-perturbing agents disrupt synthesis and function of cell wall components, leading to cell wall stress and consequent cell death. However, little is known about the detailed mechanisms by which cell wall stress renders fungal cell death. In this study, we found that ROS scavengers drastically attenuated the antifungal effect of cell wall-perturbing agents to the model fungal pathogen Candida albicans, and these agents caused remarkable ROS accumulation and activation of oxidative stress response (OSR) in this fungus...
September 17, 2016: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/27605927/visual-comparative-omics-of-fungi-for-plant-biomass-deconstruction
#16
Shingo Miyauchi, David Navarro, Igor V Grigoriev, Anna Lipzen, Robert Riley, Didier Chevret, Sacha Grisel, Jean-Guy Berrin, Bernard Henrissat, Marie-Noëlle Rosso
Wood-decay fungi contain the cellular mechanisms to decompose such plant cell wall components as cellulose, hemicellulose, and lignin. A multi-omics approach to the comparative analysis of wood-decay fungi gives not only new insights into their strategies for decomposing recalcitrant plant biomass, but also an understanding of how to exploit these mechanisms for biotechnological applications. We have developed an analytical workflow, Applied Biomass Conversion Design for Efficient Fungal Green Technology (ABCDEFGT), to simplify the analysis and interpretation of transcriptomic and secretomic data...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27603016/screen-of-non-annotated-small-secreted-proteins-of-pseudomonas-syringae-reveals-a-virulence-factor-that-inhibits-tomato-immune-proteases
#17
Takayuki Shindo, Farnusch Kaschani, Fan Yang, Judit Kovács, Fang Tian, Jiorgos Kourelis, Tram Ngoc Hong, Tom Colby, Mohammed Shabab, Rohini Chawla, Selva Kumari, Muhammad Ilyas, Anja C Hörger, James R Alfano, Renier A L van der Hoorn
Pseudomonas syringae pv. tomato DC3000 (PtoDC3000) is an extracellular model plant pathogen, yet its potential to produce secreted effectors that manipulate the apoplast has been under investigated. Here we identified 131 candidate small, secreted, non-annotated proteins from the PtoDC3000 genome, most of which are common to Pseudomonas species and potentially expressed during apoplastic colonization. We produced 43 of these proteins through a custom-made gateway-compatible expression system for extracellular bacterial proteins, and screened them for their ability to inhibit the secreted immune protease C14 of tomato using competitive activity-based protein profiling...
September 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27602183/complete-genome-sequences-of-the-serratia-plymuthica-strains-3rp8-and-3re4-18-two-rhizosphere-bacteria-with-antagonistic-activity-towards-fungal-phytopathogens-and-plant-growth-promoting-abilities
#18
Eveline Adam, Henry Müller, Armin Erlacher, Gabriele Berg
The Serratia plymuthica strains 3Rp8 and 3Re4-18 are motile, Gram-negative, non-sporulating bacteria. Strain 3Rp8 was isolated from the rhizosphere of Brassica napus L. and strain 3Re4-18 from the endorhiza of Solanum tuberosum L. Studies have shown in vitro activity against the soil-borne fungi Verticillium dahliae Kleb., Rhizoctonia solani Kühn, and Sclerotinia sclerotiorum. Here, we announce and describe the complete genome sequence of S. plymuthica 3Rp8 consisting of a single circular chromosome of 5.5 Mb that encodes 4954 protein-coding and 108 RNA-only encoding genes and of S...
2016: Standards in Genomic Sciences
https://www.readbyqxmd.com/read/27592825/chemical-compounds-in-natural-medicines-that-affect-macropharges-and-adipocyte-cells
#19
Susumu Kitanaka
Macrophages play major roles in inflammation, immunity and host defense mechanisms. Once activated they produce and release cytokines, oxygen and nitrogen species, and eicosanoids. The best characterized stimuli to induce the transcription of genes encoding pro-inflammatory proteins in macrophages in vitro is bacterial lipopolysaccharide (LPS). LPS could be used alone or in combination with recombinant mouse interferon-γ (IFN-γ). Such stimulation results in cytokine release and the synthesis of enzymes such as cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS)...
2016: Yakugaku Zasshi: Journal of the Pharmaceutical Society of Japan
https://www.readbyqxmd.com/read/27572834/a-fungal-pathogen-secretes-plant-alkalinizing-peptides-to-increase-infection
#20
Sara Masachis, David Segorbe, David Turrà, Mercedes Leon-Ruiz, Ursula Fürst, Mennat El Ghalid, Guy Leonard, Manuel S López-Berges, Thomas A Richards, Georg Felix, Antonio Di Pietro
Plant infections caused by fungi are often associated with an increase in the pH of the surrounding host tissue(1). Extracellular alkalinization is thought to contribute to fungal pathogenesis, but the underlying mechanisms are poorly understood. Here, we show that the root-infecting fungus Fusarium oxysporum uses a functional homologue of the plant regulatory peptide RALF (rapid alkalinization factor)(2,3) to induce alkalinization and cause disease in plants. An upshift in extracellular pH promotes infectious growth of Fusarium by stimulating phosphorylation of a conserved mitogen-activated protein kinase essential for pathogenicity(4,5)...
2016: Nature Microbiology
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