keyword
MENU ▼
Read by QxMD icon Read
search

aspergillus

keyword
https://www.readbyqxmd.com/read/27914020/characterization-of-xylanase-and-cellulase-produced-by-a-newly-isolated-aspergillus-fumigatus-n2-and-its-efficient-saccharification-of-barley-straw
#1
Chaoyang Lin, Zhicheng Shen, Wensheng Qin
Aspergillus fumigatus N2 was isolated from decaying wood. This strain produces extracellular xylanases and cellulases. The highest xylanase (91.9 U/mL) and CMCase (5.61 U/mL) activity was produced when 1% barley straw was used as the carbon source. The optimum pH and temperature for xylanase activity were 6.0 and 65 °C, respectively. CMCase revealed maximum activity at pH 4.0 and in the range of 65 °C. The FPase was optimally active at pH 5.0 and 60 °C. The zymograms produced by the SDS-PAGE resolution of the crude enzymes indicated that multiple enzymes were secreted into the fermentation supernatant...
December 2, 2016: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/27913978/case-series-study-of-invasive-pulmonary-aspergillosis
#2
Ana I Aller-García, Carmen Castro-Méndez, Ana Alastruey-Izquierdo, Elena M Marín-Martínez, Ismail Zakariya-Yousef Breval, Carmen Couto-Caro, Juan C López-Marín, Nicolás Peña-Griñán, Maite Ruiz de Pipaon, Ana M Romero-Mejías, Estrella Martín-Mazuelos
Diagnosis of invasive pulmonary aspergillosis (IPA) is challenging. The objective of the study was to assess the value of microbiological tests to the diagnosis of IPA in the absence of non-specific radiological data. A retrospective study of 23 patients with suspicion of IPA and positivity of some microbiological diagnostic tests was performed. These tests included conventional microbiological culture, detection of Aspergillus galactomannan (GM) antigen and in some patients (1 → 3)-β-D-glucan (BDG) and Aspergillus fumigatus DNA using the LightCycler(®) SeptiFast test...
December 2, 2016: Mycopathologia
https://www.readbyqxmd.com/read/27913684/transporter-oligomerization-form-and-function
#3
REVIEW
Yilmaz Alguel, Alexander D Cameron, George Diallinas, Bernadette Byrne
Transporters are integral membrane proteins with central roles in the efficient movement of molecules across biological membranes. Many transporters exist as oligomers in the membrane. Depending on the individual transport protein, oligomerization can have roles in membrane trafficking, function, regulation and turnover. For example, our recent studies on UapA, a nucleobase ascorbate transporter, from Aspergillus nidulans, have revealed both that dimerization of this protein is essential for correct trafficking to the membrane and the structural basis of how one UapA protomer can affect the function of the closely associated adjacent protomer...
December 15, 2016: Biochemical Society Transactions
https://www.readbyqxmd.com/read/27913218/methylotrophic-yeast-pichia-pastoris-as-a-chassis-organism-for-polyketide-synthesis-via-the-full-citrinin-biosynthetic-pathway
#4
Ying Xue, Chuixing Kong, Wei Shen, Chenxiao Bai, Yanna Ren, Xiangshan Zhou, Yuanxing Zhang, Menghao Cai
With the rapid development of synthetic biology, exploring various chassis organisms has become necessary to improve the heterologous biosynthesis of natural products and pharmaceuticals. In this study, we tested the potential of the industrial methylotrophic yeast strain Pichia pastoris for the heterologous synthesis of polyketides. A recombinant P. pastoris GS-pksCT-npgA carrying the Monascus purpureus citrinin polyketide synthase gene pksCT and the Aspergillus nidulans phosphopantetheinyl transferase gene npgA was constructed...
November 29, 2016: Journal of Biotechnology
https://www.readbyqxmd.com/read/27913168/fermentative-production-of-high-titer-citric-acid-from-corn-stover-feedstock-after-dry-dilute-acid-pretreatment-and-biodetoxification
#5
Ping-Ping Zhou, Jiao Meng, Jie Bao
The aim of this work is to study the citric acid fermentation by a robust strain Aspergillus niger SIIM M288 using corn stover feedstock after dry dilute sulfuric acid pretreatment and biodetoxification. Citric acid at 100.04g/L with the yield of 94.11% was obtained, which are comparable to the starch or sucrose based citric acid fermentation. No free wastewater was generated in the overall process from the pretreatment to citric acid fermentation. Abundant divalent metal ions as well as high titer of potassium, phosphate, and nitrogen were found in corn stover hydrolysate...
November 15, 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27912916/potentially-toxic-filamentous-fungi-associated-to-the-economically-important-nodipecten-nodosus-linnaeus-1758-scallop-farmed-in-southeastern-rio-de-janeiro-brazil
#6
Antônia Santos, Rachel Ann Hauser-Davis, Manoel José Soares Santos, Salvatore Giovani De Simone
Numerous countries have been confronted with infectious diseases in mariculture activities, including fungi infections, although reports in scallops are scarce. Thus, this study aimed to investigate the occurrence of filamentous fungi in Nodipecten nodosus specimens from three marine farms in Southeastern Brazil. Eight fungi genera were observed in the branchial arches, intestine and muscle tissue of the scallop specimens. These include potentially toxin-producing species, such as Aspergillus, Penicillium and Fusarium...
November 29, 2016: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/27912181/scaling-up-and-ionic-liquid-based-extraction-of-pectinases-from-aspergillus-flavipes-cultures
#7
Vicente E Wolf-Márquez, M Aurora Martínez-Trujillo, Guillermo Aguilar Osorio, Faustino Patiño, María S Álvarez, Ana Rodríguez, M Ángeles Sanromán, Francisco J Deive
The viability of the scaling-up of pectinases production by Aspergillus flavipes at 5L-bioreactor scale has been demonstrated by keeping constant the power input, and a drastic increase in the endo- and exopectinolytic enzyme production was recorded (7- and 40-fold, respectively). The main process variables were modelled by means of logistic and Gompertz equations. In order to overcome the limitations of the conventional downstream strategies, a novel extraction strategy was proposed on the basis of the adequate salting-out potential of two biocompatible cholinium-based ionic liquids (N1112OHCl and N1112OHH2PO4) in aqueous solutions of Tergitol, reaching more than 90% of extraction...
November 18, 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27910139/characterization-of-patients-with-chronic-pulmonary-aspergillosis-according-to-the-new-escmid-ers-ecmm-and-idsa-guidelines
#8
Helmut J F Salzer, Jan Heyckendorf, Barbara Kalsdorf, Thierry Rolling, Christoph Lange
Recently, the Infectious Diseases Society of America (IDSA) and the European Society for Clinical Microbiology and Infectious Diseases (ESCMID) in cooperation with the European Respiratory Society (ERS) and the European Confederation of Medical Mycology (ECMM) published guidelines for the diagnosis of chronic pulmonary aspergillosis (CPA). Both guidelines, however, carry significant differences. We retrospectively applied the diagnostic recommendations on a patient cohort of 71 previously diagnosed CPA patients in order to compare both guidelines...
December 1, 2016: Mycoses
https://www.readbyqxmd.com/read/27909797/wd40-repeat-protein-mocrec-is-essential-for-carbon-repression-and-is-involved-in-conidiation-growth-and-pathogenicity-of-magnaporthe-oryzae
#9
Khalid Abdelkarim Omer Matar, Xiaofeng Chen, Dongjie Chen, Wilfred Mabeche Anjago, Justice Norvienyeku, Yahong Lin, Meilian Chen, Zonghua Wang, Daniel J Ebbole, Guo-Dong Lu
Carbon catabolite repression (CCR) is a common regulatory mechanism used by microorganisms to prioritize use of a preferred carbon source (usually glucose). The CreC WD40-repeat protein is a major component of the CCR pathway in Aspergillus nidulans. To clarify the function of the CreC ortholog from Magnaporthe oryzae in regulating gene expression important for pathogenesis, MoCreC was identified and genetically characterized. The vegetative growth rate of the MoCreC deletion mutant on various carbon sources was reduced...
December 1, 2016: Current Genetics
https://www.readbyqxmd.com/read/27907120/structural-and-functional-elucidation-of-yeast-lanosterol-14%C3%AE-demethylase-in-complex-with-agrochemical-antifungals
#10
Joel D A Tyndall, Manya Sabherwal, Alia A Sagatova, Mikhail V Keniya, Jacopo Negroni, Rajni K Wilson, Matthew A Woods, Klaus Tietjen, Brian C Monk
Azole antifungals, known as demethylase inhibitors (DMIs), target sterol 14α-demethylase (CYP51) in the ergosterol biosynthetic pathway of fungal pathogens of both plants and humans. DMIs remain the treatment of choice in crop protection against a wide range of fungal phytopathogens that have the potential to reduce crop yields and threaten food security. We used a yeast membrane protein expression system to overexpress recombinant hexahistidine-tagged S. cerevisiae lanosterol 14α-demethylase and the Y140F or Y140H mutants of this enzyme as surrogates in order characterize interactions with DMIs...
2016: PloS One
https://www.readbyqxmd.com/read/27907048/chemical-defence-in-a-millipede-evaluation-and-characterization-of-antimicrobial-activity-of-the-defensive-secretion-from-pachyiulus-hungaricus-karsch-1881-diplopoda-julida-julidae
#11
Slaviša Stanković, Ivica Dimkić, Ljubodrag Vujisić, Sofija Pavković-Lučić, Zvezdana Jovanović, Tatjana Stević, Ivana Sofrenić, Bojan Mitić, Vladimir Tomić
The chemical defence of the millipede Pachyiulus hungaricus is reported in the present paper, in which a chemical characterization is given and antimicrobial activity is determined. In total, independently of sex, 44 compounds were identified. All compounds belong to two groups: quinones and pentyl and hexyl esters of long-chain fatty acids. The relative abundances of quinones and non-quinones were 94.7% vs. 5.3% (males) and 87.3% vs. 12.7% (females), respectively. The two dominant quinones in both sexes were 2-methyl-1,4,-benzoquinone and 2-methoxy-3-methyl-1,4-benzoquinone...
2016: PloS One
https://www.readbyqxmd.com/read/27906500/phylogenetic-studies-gene-cluster-analysis-and-enzymatic-reaction-support-anthrahydroquinone-reduction-as-the-physiological-function-of-fungal-17%C3%AE-hydroxysteroid-dehydrogenase
#12
Leon Fürtges, David Conradt, Michael A Schätzle, Shailesh Kumar Singh, Nada Kraševec, Tea Lanišnik Rižner, Michael Müller, Syed Masood Husain
17β-Hydroxysteroid dehydrogenase (17β-HSDcl) from the filamentous fungus Curvularia lunata (teleomorph Cochliobolus lunatus) catalyzes NADP(H)-dependent oxidoreductions of androgens and estrogens. Despite detailed biochemical and structural characterization of 17β-HSDcl, its physiological function remains unknown. On the basis of amino acid sequence alignment, phylogenetic studies, and the recent identification of the physiological substrates of the homologous MdpC from Aspergillus nidulans and AflM from Aspergillus parasiticus, we propose an anthrahydroquinone as the physiological substrate of 17β-HSDcl...
December 1, 2016: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/27905064/a-mini-survey-of-moulds-and-mycotoxins-in-locally-grown-and-imported-wheat-grains-in-nigeria
#13
Ayotokunbo O Egbontan, Clement G Afolabi, Iyabode A Kehinde, Ololade A Enikuomehin, Chibundu N Ezekiel, Michael Sulyok, Benedikt Warth, Rudolf Krska
A preliminary survey involving limited sample size was conducted to determine the spectrum of moulds and mycotoxins in wheat grains from flour mills and local markets in Nigeria. Fourteen wheat samples were analyzed for moulds using standard mycological methods and for toxic fungal metabolites using a liquid chromatography-tandem mass spectrometric method. Fusarium (range of incidence 12.5-61.7%) dominated in the wheat grains though species of Aspergillus (range of incidence 2.24-3.86%) were also recovered from the samples...
November 30, 2016: Mycotoxin Research
https://www.readbyqxmd.com/read/27904738/recent-developments-in-the-management-of-invasive-fungal-infections-in-patients-with-oncohematological-diseases
#14
REVIEW
Markus Ruhnke, Stefan Schwartz
Patients with hematological cancer have a high risk of invasive fungal diseases (IFDs). These infections are mostly life threatening and an early diagnosis and initiation of appropriate antifungal therapy are essential for the clinical outcome. Most commonly, Aspergillus and Candida species are involved. However, other non-Aspergillus molds are increasingly be identified in cases of documented IFDs. Important risk factors are long lasting granulocytopenia with neutrophil counts below 500/μl for more than 10 days or graft-versus-host disease resulting from allogeneic stem-cell transplantation...
December 2016: Therapeutic Advances in Hematology
https://www.readbyqxmd.com/read/27904061/diagnosis-and-treatment-of-mucormycosis-in-patients-with-hematological-malignancies
#15
Yuki Asano-Mori
The risk of invasive fungal infections (IFIs) is extremely high in patients with hematological malignancies due to the prolonged and profound neutropenia and immunosuppression after chemotherapy and hematopoietic stem cell transplantation. There has been increasing interest in mucormycosis despite its relatively uncommon occurrence, because occasional breakthrough infections have been observed under anti-aspergillus prophylaxis. The aggressive nature of mucormycosis easily leads to high mortality because of delays in diagnosis and incorrect treatment decisions, which are due in part to lack of adjunctive diagnostic tools and having similar clinical and radiological features with aspergillosis...
2016: Medical Mycology Journal
https://www.readbyqxmd.com/read/27904060/causative-agents-of-aspergillosis-including-cryptic-aspergillus-species-and-a-fumigatus
#16
Takahito Toyotome
Aspergillosis is an important deep mycosis. The causative agents are Aspergillus fumigatus, Aspergillus flavus, Aspergillus niger, and Aspergillus terreus, of which A. fumigatus is the most prevalent. Cryptic Aspergillus spp., which morphologically resemble representative species of each Aspergillus section, also cause aspergillosis. Most of the cryptic species reveal different susceptibility patterns and/or different secondary metabolite profiles, also called exometabolome in this manuscript, from those representative species...
2016: Medical Mycology Journal
https://www.readbyqxmd.com/read/27904055/the-first-isolation-of-aspergillus-allahabadii-from-a-cormorant-with-pulmonary-aspergillosis
#17
Sue Yee Lim, Rui Kano, Kenji Ooya, Shunta Kimura, Tokuma Yanai, Atsuhiko Hasegawa, Hiroshi Kamata
In this study, we report the first isolation of Aspergillus allahabadii from a Japanese cormorant with pulmonary aspergillosis. We performed molecular identification and antifungal susceptibility testing with the E-test. A 7-month-old male cormorant died because of uric acid deposition secondary to dehydration. Whitish nodular lesions were present on the caudal thoracic air sac in the right thoracic cavity. Histopathology revealed multifocal pyogranulomatous necrotic lesions with numerous fungal hyphae in the thoracic air sac...
2016: Medical Mycology Journal
https://www.readbyqxmd.com/read/27903631/genomics-of-compensatory-adaptation-in-experimental-populations-of-aspergillus-nidulans
#18
Jeremy R Dettman, Nicolas Rodrigue, Sijmen E Schoustra, Rees Kassen
Knowledge of the number and nature of genetic changes responsible for adaptation is essential for understanding and predicting evolutionary trajectories. Here, we study the genomic basis of compensatory adaptation to the fitness cost of fungicide resistance in experimentally evolved strains of the filamentous fungus Aspergillus nidulans The original selection experiment tracked the fitness recovery of lines founded by an ancestral strain that was resistant to fludioxonil, but paid a fitness cost in the absence of the fungicide...
November 30, 2016: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/27903443/biochemical-and-genetic-basis-of-orsellinic-acid-biosynthesis-and-prenylation-in-a-stereaceous-basidiomycete
#19
Jana Braesel, Janis Fricke, Daniel Schwenk, Dirk Hoffmeister
The prenylphenols are a class of natural products that have been frequently isolated from basidiomycetes, e.g., from the genus Stereum (false turkey tail fungi) and other Russulales as well as from ascomycetes. Biosynthetically, these compounds are considered hybrids, as the orsellinic acid moiety is a polyketide and the prenyl side chain originates from the terpene metabolism, although no literature on the genetic and biochemical background of the biosynthesis is available. In a stereaceous basidiomycete, referred to as BY1, a new prenylphenol, now termed cloquetin, was identified and its structure elucidated by mass spectrometry and nuclear magnetic resonance spectroscopy...
November 26, 2016: Fungal Genetics and Biology: FG & B
https://www.readbyqxmd.com/read/27903420/microbiology-of-processed-edible-insect-products-results-of-a-preliminary-survey
#20
Nils Th Grabowski, Günter Klein
Little is known of the microbiology of processed insect products. The present survey analysed a total of n=38 samples of deep-fried and spiced (Acheta domesticus, Locusta migratoria, and Omphisa fuscidentalis), cooked in soy sauce ("tsukudani"; Oxya yezoensis, Vespula flaviceps, and Bombyx mori), dried (A. domesticus, L. migatoria, Alphitobius diaperinus, Tenebrio molitor, B. mori, Hermetia illucens, and Musca domestica), powdered (H. illucens, T. molitor) and other (incl. deep-frozen B. mori and honeybee pollen) insect products microbiologically (total bacterial count [TBC], Enterobacteriaceae, staphylococci, bacilli, and yeasts and moulds counts, salmonellae, Listeria monocytogenes, and Escherichia coli)...
November 9, 2016: International Journal of Food Microbiology
keyword
keyword
23210
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"