Publications

TitleAbstractYear(sorted descending)
Filter
PMID
Filter
characterization of melanin pigment produced by aspergillus nidulans.although most of the ascomycetes present dhn-melanin, some reports suggest that a. nidulans does not produce this type of melanin. in this study, we analyzed the pigment extracted from highly melanized strains (mel1 and mel2) of aspergillus nidulans to determine the type of melanin present in this fungus. our results showed that the pigment produced by mel1 and mel2 mutants possesses physical and chemical properties and uv- and ir-spectra very similar to synthetic dopa-melanin. the characterizat ...201122805928
development of transformation system of verticillium lecanii (lecanicillium spp.) (deuteromycotina: hyphomycetes) based on nitrate reductase gene of aspergillus nidulans.a heterologous transformation system was developed for v. lecanii based on the complementation of a nitrate reductase mutant. nitrate reductase mutants were obtained by resistance to chlorate in a rate of 23.24% when compared to other mutations that lead to the chlorate resistance. mutant no. 01 and 04 was chosen for the transformation experiments. plasmid pbt was used as transformation vector containing the aspergillus nidulans nitrate reductase gene. a frequency of approximately 3 transformant ...201122754022
otomycosis in central iran: a clinical and mycological study.otomycosis is a fungal infection of the external ear with bothersome symptoms. the aim of this study was to evaluate the prevalence of fungal agents, predisposing factors and characteristics of patients.201122737432
fungal photobiology: a synopsis.fungi respond and adapt to many environmental signals including light. the photobiology of fungi has been extensively investigated, but in recent years the identification of the first fungal photoreceptor, wc-1 in the ascomycete neurospora crassa, and the discovery that similar photoreceptors are required for photoreception in other ascomycete, basidiomycete and zygomycete fungi has allowed the molecular characterization of light reception and the early steps of signal transduction in a number o ...201122679584
allergens/antigens, toxins and polyketides of important aspergillus species.the medical, agricultural and biotechnological importance of the primitive eukaryotic microorganisms, the fungi was recognized way back in 1920. among various groups of fungi, the aspergillus species are studied in great detail using advances in genomics and proteomics to unravel biological and molecular mechanisms in these fungi. aspergillus fumigatus, aspergillus flavus, aspergillus niger, aspergillus parasiticus, aspergillus nidulans and aspergillus terreus are some of the important species r ...201122468035
effects of laea deletion on aspergillus flavus conidial development and hydrophobicity may contribute to loss of aflatoxin production.laea of aspergillus nidulans is a putative methyltransferase and a component of the velvet complex; it is thought to mainly affect expression of genes required for the production of secondary metabolites. we found that although aspergillus flavus ca14 laea deletion mutants showed no aflatoxin production, expression of some of the early genes involved in aflatoxin formation, but not the later genes, could still be detected. the mutants grown in minimal medium supplemented with simple sugars and o ...201122289775
functional characterization and oligomerization of a recombinant xyloglucan-specific endo-β-1,4-glucanase (gh12) from aspergillus niveus.xyloglucan is a major structural polysaccharide of the primary (growing) cell wall of higher plants. it consists of a cellulosic backbone (beta-1,4-linked glucosyl residues) that is frequently substituted with side chains. this report describes aspergillus nidulans strain a773 recombinant secretion of a dimeric xyloglucan-specific endo-β-1,4-glucanohydrolase (xega) cloned from aspergillus niveus. the orf of the a. niveus xega gene is comprised of 714 nucleotides, and encodes a 238 amino acid pro ...201122230786
expression and characterization of an endo-1,4-β-galactanase from emericella nidulans in pichia pastoris for enzymatic design of potentially prebiotic oligosaccharides from potato galactans.potato pulp is a high-volume side-stream from industrial potato starch manufacturing. enzymatically solubilized β-1,4-galactan-rich potato pulp polysaccharides of molecular weights >100 kda (sppp) are highly bifidogenic in human fecal sample fermentations in vitro. the objective of the present study was to use potato β-1,4-galactan and the sppp as substrates for enzymatic production of potentially prebiotic compounds of lower and narrower molecular weight. a novel endo-1,4-β-galactanase from eme ...201122226198
currency notes and coins as a possible source of transmitting fungal pathogens of man and plants.currency (notes and coins) handling by people during transaction is one of the most mobile objects within the community, which has a potential of transmitting pathogens. a survey carried out recently in nanded city (maharashtra) revealed heavy contamination of currency notes and coins by important fungal pathogens of plants and man, i.e. aspergillus niger (60.37%), a. flavus (3.98%), a.nidulans (0.2%), penicillium citrinum (17.80%), alternaria tenuis (0.20%), curvularia pallescens (0.20%), clado ...201123505834
A strong promoter, PMagpd, provides a tool for high gene expression in entomopathogenic fungus, Metarhizium acridum.A glyceraldehyde-3-phosphate dehydrogenase gene (gpd) promoter (PMagpd) was obtained from Metarhizium acridum and its active region analyzed by 5'-deletion strategy using ß-glucuronidase (GUS) as a reporter. Sequence analysis revealed that typical regulatory elements of PMagpd were included in the 1.7 kb region upstream of the start codon of the Magpd gene. Deletion of the region from -1,691 bp to -1,463 bp, where the gpd box is harbored, did not significantly affect the PMagpd activity. Deletio ...201122109936
Invasive mold infections in chronic granulomatous disease: a 25-year retrospective survey.Invasive fungal infection (IFI) represents a life-threatening condition for patients with chronic granulomatous disease (CGD) and causes one-third of deaths in this population. This study offers a descriptive review of invasive mold infection (mIFI) in children with CGD over an extended period of time.201122080130
the vea gene of the pine needle pathogen dothistroma septosporum regulates sporulation and secondary metabolism.fungi possess genetic systems to regulate the expression of genes involved in complex processes such as development and secondary metabolite biosynthesis. the product of the velvet gene vea, first identified and characterized in aspergillus nidulans, is a key player in the regulation of both of these processes. since its discovery and characterization in many aspergillus species, vea has been found to have similar functions in other fungi, including the dothideomycete mycosphaerella graminicola. ...201122227160
Polyphasic characterization of "Aspergillus nidulans var. roseus" ATCC 58397.Polyphasic characterization of the echinocandin B producer Aspergillus nidulans var. roseus ATCC 58397 strain was carried out to elucidate its taxonomical status. According to its carbon source utilization and secondary metabolite spectrum as well as the partial ß-tubulin, calmodulin, and ?-actin gene sequences, A. nidulans var. roseus belongs to the Emericella rugulosa species. Auxotroph mutants of A. nidulans var. roseus ATCC 58397 and E. rugulosa CBS 171.71 and CBS 133.60 formed stable hetero ...201121858538
engineering hydrophobin dewa to generate surfaces that enhance adhesion of human but not bacterial cells.hydrophobins are fungal proteins with the ability to form immunologically inert membranes of high stability, properties that makes them attractive candidates for orthopaedic implant coatings. cell adhesion on the surface of such implants is necessary for better integration with the neighbouring tissue; however, hydrophobin surfaces do not mediate cell adhesion. the aim of this project was therefore to investigate whether the class i hydrophobin dewa from aspergillus nidulans can be functionalize ...201122154865
complex mechanisms regulate developmental expression of the mata (hmg) mating type gene in homothallic aspergillus nidulans.sexual reproduction is a fundamental developmental process that allows for genetic diversity through the control of zygote formation, recombination, and gametogenesis. the correct regulation of these events is paramount. sexual reproduction in filamentous fungi, including mating strategy (self-fertilization/homothallism or outcrossing/heterothallism), is determined by the expression of mating type genes at mat loci. aspergillus nidulans mata encodes a critical regulator that is a fungal ortholog ...201121868608
cytotoxic pheofungins from an engineered fungus impaired in posttranslational protein modification. 201121913294
the anisin1 gene encodes a defensin-like protein and supports the fitness of aspergillus nidulans.in the genome of aspergillus nidulans, a defensin-like protein, anisin1, was annotated with high homology to the mosquito defensin aadefa1. so far, no studies exist on defensins from filamentous ascomycetes. therefore, we characterized the anisin1 gene in a. nidulans and generated a deletion mutant, which suffered from a defect in mitospore development and produced less conidia at 42°c compared to the reference strain. in surface cultures of a. nidulans wild type, the anisin1 expression correlat ...201122113351
Culture-positive invasive aspergillosis in a medical center in Taiwan, 2000-2009.We reviewed 776 patients who were culture positive for Aspergillus species at the hospital from 2000 to 2009. The isolates were collected for species identification by oligonucleotide hybridization and sequence analysis. A total of 96 cases of proven or probable IA were identified according to published criteria. The incidence of IA has increased significantly during the study period. Aspergillus fumigatus and A. flavus (41.7% each) were equally prevalent causative species. IA due to unusual spe ...201121997774
definition and characterization of enzymes for maximal biocatalytic solubilization of prebiotic polysaccharides from potato pulp.potato pulp is a high-volume co-processing product resulting from industrial potato starch manufacturing. potato pulp is particularly rich in pectin, notably galactan branched rhamnogalacturonan i polysaccharides, which are highly bifidogenic when solubilized. the objective of the present study was to characterize and compare four homogalacturonan degrading enzymes capable of catalyzing the required solubilization of these pectinaceous polysaccharides from potato pulp in a 1 min reaction. an add ...201122112514
studies on differential nuclear translocation mechanism and assembly of the three subunits of the arabidopsis thaliana transcription factor nf-y.the eukaryotic transcription factor nf-y consists of three subunits (a, b, and c), which are encoded in arabidopsis thaliana in multigene families consisting of 10, 13, and 13 genes, respectively. in principle, all potential combinations of the subunits are possible for the assembly of the heterotrimeric complex. we aimed at assessing the probability of each subunit to participate in the assembly of nf-y. the evaluation of physical interactions among all members of the nf-y subunit families indi ...201122199235
recombinant production and characterisation of two related gh5 endo-β-1,4-mannanases from aspergillus nidulans fgsc a4 showing distinctly different transglycosylation capacity.the glycoside hydrolase family 5 (gh5) endo-β-1,4-mannanases mana and manc from aspergillus nidulans fgsc a4 were produced in pichia pastoris x33 and purified in high yields of 120 and 145mg/l, respectively, from the culture supernatants. both enzymes showed increasing catalytic efficiency (k(cat)/k(m)) towards β-1,4 manno-oligosaccharides with the degree of polymerisation (dp) from 4 to 6 and also hydrolysed konjac glucomannan, guar gum and locust bean gum galactomannans. manc had up to two-fol ...201121867780
nuclear transporters in a multinucleated organism: functional and localization analyses in aspergillus nidulans.nuclear transporters mediate bidirectional macromolecule traffic through the nuclear pore complex (npc), thus participating in vital processes of eukaryotic cells. a systematic functional analysis in aspergillus nidulans permitted the identification of 4 essential nuclear transport pathways of a hypothetical number of 14. the absence of phenotypes for most deletants indicates redundant roles for these nuclear receptors. subcellular distribution studies of these carriers show three main distribut ...201121880896
the length of adaptive walks is insensitive to starting fitness in aspergillus nidulans.adaptation involves the successive substitution of beneficial mutations by selection, a process known as an adaptive walk. gradualist models of adaptation, which assume that all mutations are small relative to the distance to a fitness optimum, predict that adaptive walks should be longer when the founding genotype is less well adapted. more recent work modeling adaptation as a sequence of moves in phenotype or genotype space predicts, by contrast, much shorter adaptive walks irrespective of the ...201122023575
conserved and specific responses to hypoxia in aspergillus oryzae and aspergillus nidulans determined by comparative transcriptomics.hypoxia imposes stress on filamentous fungi that require oxygen to proliferate. global transcription analysis of aspergillus oryzae grown under hypoxic conditions found that the expression of about 50% of 4,244 affected genes was either induced or repressed more than 2-fold. a comparison of these genes with the hypoxically regulated genes of aspergillus nidulans based on their predicted amino acid sequences classified them as bi-directional best hit (bbh), one-way best hit (extra homolog, eh), a ...201122170104
a new class of imp dehydrogenase with a role in self-resistance of mycophenolic acid producing fungi.many secondary metabolites produced by filamentous fungi have potent biological activities, to which the producer organism must be resistant. an example of pharmaceutical interest is mycophenolic acid (mpa), an immunosuppressant molecule produced by several penicillium species. the target of mpa is inosine-5'-monophosphate dehydrogenase (impdh), which catalyses the rate limiting step in the synthesis of guanine nucleotides. the recent discovery of the mpa biosynthetic gene cluster from penicilli ...201121923907
wild-type mic distributions and epidemiological cutoff values for amphotericin b and aspergillus spp. for the clsi broth microdilution method (m38-a2 document).although clinical breakpoints have not been established for mold testing, epidemiological cutoff values (ecvs) are available for aspergillus spp. versus the triazoles and caspofungin. wild-type (wt) mic distributions (organisms in a species-drug combination with no acquired resistance mechanisms) were defined in order to establish ecvs for six aspergillus spp. and amphotericin b. two sets (clsi/eucast broth microdilution) of available mics were evaluated: those for a. fumigatus (3,988/833), a. f ...201121876047
identification of the galactitol dehydrogenase, ladb, that is part of the oxido-reductive d-galactose catabolic pathway in aspergillus niger.for the catabolism of d-galactose three different metabolic pathways have been described in filamentous fungi. apart from the leloir pathway and the oxidative pathway, there is an alternative oxido-reductive pathway. this oxido-reductive pathway has similarities to the metabolic pathway of l-arabinose, and in trichoderma reesei (hypocrea jecorina) and aspergillus nidulans the same enzyme is employed for the oxidation of l-arabitol and galactitol. here we show evidence that in aspergillus nigerl- ...201122155165
in vivo roles of the basic domain of dynactin p150 in microtubule plus-end tracking and dynein function.microtubule (mt) plus-end-tracking proteins accumulate at mt plus ends for various cellular functions, but their targeting mechanisms are not fully understood (akhmanova a and steinmetz mo. tracking the ends: a dynamic protein network controls the fate of microtubule tips. nat rev mol cell biol 2008;9:309-322.). here, we tested in the filamentous fungus aspergillus nidulans the requirement for plus-end localization of dynactin p150, a protein essential for dynein function. deletion of the n-term ...201122106867
new resources for functional analysis of omics data for the genus aspergillus.detailed and comprehensive genome annotation can be considered a prerequisite for effective analysis and interpretation of omics data. as such, gene ontology (go) annotation has become a well accepted framework for functional annotation. the genus aspergillus comprises fungal species that are important model organisms, plant and human pathogens as well as industrial workhorses. however, go annotation based on both computational predictions and extended manual curation has so far only been availa ...201121974739
Putative stress sensors WscA and WscB are involved in hypo-osmotic and acidic pH stress tolerance in Aspergillus nidulans.Wsc proteins have been identified in fungi and are believed to be stress sensors in the cell wall integrity (CWI) signaling pathway. In this study, we characterized the sensor orthologs WscA and WscB in Aspergillus nidulans. Using hemagglutinin-tagged WscA and WscB, we showed both Wsc proteins to be N- and O-glycosylated and localized in the cell wall and membrane, implying that they are potential cell surface sensors. The wscA disruptant (?wscA) strain was characterized by reduced colony and co ...201121926329
association between indoor fungi in delhi homes and sensitization in children with respiratory allergy.indoor fungi are potential sensitizing agents in children and their detection and quantification in indoor air are important in the diagnosis and environmental management of fungal allergies. the objective of this investigation was to assess the prevalence of fungal allergies in children in delhi and to study the association between mold counts in the homes of children and their sensitization to respective fungal extracts. fungal concentrations and seasonality were studied at two-week intervals ...201122103346
farnesol-induced cell death in the filamentous fungus aspergillus nidulans.foh (farnesol), a non-sterol isoprenoid produced by dephosphorylation of farnesyl pyrophosphate, has been shown to inhibit proliferation and induce apoptosis. we have been using aspergillus nidulans and foh as a model system and cell death stimulus, respectively, aiming to understand by which means filamentous fungi are driven towards cell death. here, we review some of our findings about foh-induced cell death in a. nidulans.201121936849
Aspergillus Myosin-v supports polarized growth in the absence of microtubule-based transport.In the filamentous fungus Aspergillus nidulans, both microtubules and actin filaments are important for polarized growth at the hyphal tip. Less clear is how different microtubule-based and actin-based motors work together to support this growth. Here we examined the role of myosin-V (MYOV) in hyphal growth. MYOV-depleted cells form elongated hyphae, but the rate of hyphal elongation is significantly reduced. In addition, although wild type cells without microtubules still undergo polarized grow ...201122194856
Heterochromatin influences the secondary metabolite profile in the plant pathogen Fusarium graminearum.Chromatin modifications and heterochromatic marks have been shown to be involved in the regulation of secondary metabolism gene clusters in the fungal model system Aspergillus nidulans. We examine here the role of HEP1, the heterochromatin protein homolog of Fusarium graminearum, for the production of secondary metabolites. Deletion of Hep1 in a PH-1 background strongly influences expression of genes required for the production of aurofusarin and the main tricothecene metabolite DON. In the Hep1 ...201122100541
Disruption of Trichoderma reesei cre2, encoding an ubiquitin C-terminal hydrolase, results in increased cellulase activity.ABSTRACT:201122070776
structural analysis of fungal cerebrosides.of the ceramide monohexosides (cmhs), gluco- and galactosyl-ceramides are the main neutral glycosphingolipids expressed in fungal cells. their structural determination is greatly dependent on the use of mass spectrometric techniques, including fast atom bombardment-mass spectrometry, electrospray ionization, and energy collision-induced dissociation mass spectrometry. nuclear magnetic resonance has also been used successfully. such a combination of techniques, combined with classical analytical ...201122164155
Isolation and characterization of self-fertile suppressors from the sterile nsdD deletion mutant of Aspergillus nidulans.To identify downstream and/or interactive factors of the nsdD gene, which encodes a positive regulator of sexual development of Aspergillus nidulans, suppressor mutants displaying a self-fertile phenotype were isolated from a sterile nsdD deletion mutant. At least five different loci (sndA-E) were identified and genetically analyzed. In the nsdD (+) background, most of the suppressors showed a marked increment of sexual development, even under the stress conditions that n ...201122203574
the velvet gene, fgve1, affects fungal development and positively regulates trichothecene biosynthesis and pathogenicity in fusarium graminearum.trichothecenes are a group of toxic secondary metabolites produced mainly by fusarium graminearum (teleomorph: gibberella zeae) during the infection of crop plants, including wheat, maize, barley, oats, rye and rice. some fungal genes involved in trichothecene biosynthesis have been shown to encode regulatory proteins. however, the global regulation of toxin biosynthesis is still enigmatic. in addition to the production of secondary metabolites belonging to the trichothecene family, f. graminear ...201122013911
[general epidemiology of invasive fungal disease.]invasive mycoses associated with high morbidity and mortality rates are increasing among immunocompromised or severely ill patients. candida, cryptococcus, pneumocystis and aspergillus are most prevalent agents with varying distribution as regards geography, patient condition and hospital units. the latest multicentre candidaemia survey conducted in spain, showed c. albicans as the most frequently isolated species followed by c. parapsilosis, c. glabrata, c. tropicalis and c. krusei in contrast ...201122079232
constitutive expression, purification and characterization of a phosphoglucomutase from fusarium oxysporum.the phosphoglucomutase gene from a wild type fusarium oxysporum strain (f3), was homologously expressed, under the control of the constitutive promoter of gpda of aspergillus nidulans. the transformant produced elevated levels of phosphoglucomutase activity compared to the wild type, a fact that facilitated the subsequent purification procedure. the enzyme (fopgm) was purified to homogeneity applying three anion exchange and one gel filtration chromatography steps. the native enzyme revealed a m ...201122112903
heterologous expression system in aspergillus oryzae for fungal biosynthetic gene clusters of secondary metabolites.fungal secondary metabolites have been considered promising resources in the search for novel bioactive compounds. given the high potential of fungi as genetic resources, it is essential to find an efficient way to link biosynthetic genes to the product in a heterologous system, because many genes for the secondary metabolite in the original strain are silent under standard laboratory conditions. in a previous study, we constructed a heterologous expression system for a biosynthetic gene cluster ...201122083274
contributions of the peroxisome and β-oxidation cycle to biotin synthesis in fungi.the first step in the synthesis of the bicyclic rings of d-biotin is mediated by 8-amino-7-oxononanoate (aon) synthase, which catalyzes the decarboxylative condensation of l-alanine and pimelate thioester. we found that the aspergillus nidulans aon synthase, encoded by the biof gene, is a peroxisomal enzyme with a type 1 peroxisomal targeting sequence (pts1). localization of aon to the peroxisome was essential for biotin synthesis because expression of a cytosolic aon variant or deletion of pexe ...201121998305
rescue of aspergillus nidulans severely debilitating null mutations in escrt-0, i, ii and iii genes by inactivation of a salt-tolerance pathway allows examination of escrt gene roles in ph signalling.the aspergillus pal pathway hijacks escrt proteins into ambient ph signalling complexes. we show that components of escrt-0, escrt-i, escrt-ii and escrt-iii are nearly essential for growth, precluding assessment of null mutants for ph signalling or trafficking. this severely debilitating effect is rescued by loss-of-function mutations in two cation tolerance genes, one of which, slta, encodes a transcription factor whose inactivation promotes hypervacuolation. exploiting a conditional expression ...201122135362
The Aspergillus giganteus antifungal protein AFPNN5353 activates the cell wall integrity pathway and perturbs calcium homeostasis.The antifungal protein AFPNN5353 is a defensin-like protein of Aspergillus giganteus. It belongs to a group of secretory proteins with low molecular mass, cationic character and a high content of cysteine residues. The protein inhibits the germination and growth of filamentous ascomycetes, including important human and plant pathogens and the model organsims Aspergillus nidulans and Aspergillus niger.201121943024
the polo-like kinase plka in aspergillus nidulans is not essential, but plays important roles during vegetative growth and development.the polo-like kinases (plks) are conserved, multi-functional cell cycle regulators that are induced in many forms of cancer, and play additional roles in metazoan development. we previously identified plka in aspergillus nidulans, the only plk investigated in filamentous fungi to date, and partially characterized its function through overexpression. here, we report the plka null phenotype. surprisingly, plka was not essential, unlike plks in other organisms that contain a single homologue. a sub ...201122140227
Post-synthetic modification of plant cell walls by expression of microbial hydrolases in the apoplast.The systematic creation of defined cell wall modifications in the model plant Arabidopsis thaliana by expression of microbial hydrolases with known specific activities is a promising approach to examine the impacts of cell wall composition and structure on both plant fitness and cell wall recalcitrance. Moreover, this approach allows the direct evaluation in living plants of hydrolase specificity, which can differ from in vitro specificity. To express genes encoding microbial hydrolases in A. th ...201121910026
Physiological and Biochemical Characterization of AnNitA, the Aspergillus nidulans High-Affinity Nitrite Transporter.High-affinity nitrite influx into mycelia of Aspergillus nidulans has been characterized by use of (13)NO(2)(-), giving average K(m) and V(max) values of 48 ± 8 µM and 228 ± 49 nmol mg(-1) dry weight (DW) h(-1), respectively. Kinetic analysis of a plot that included an additional large number of low-concentration fluxes gave an excellent monophasic fit (r(2) = 0.96), with no indication of sigmoidal kinetics. Two-dimensional (2D) and three-dimensional (3D) models of AnNitA are presented, and the ...201122021238
Transcription of Aspergillus nidulans pacC is modulated by alternative RNA splicing of palB.Fungi have evolved elaborate signal transduction networks for remodeling metabolic pathways to scavenge nutrients, including the secretion of nutritional enzymes. This adaptive response involves the conserved PacC/Pal signal transduction pathway, which mediates the transcriptional response to ambient pH. In this study, we show that transcription of the gene for PacC is modulated in response to nutrient changes, phosphate and carbon sources, and pH. In addition, we show that transcription of pacC ...201121985967
heterologous expression and biochemical characterization of novel pyranose 2-oxidases from the ascomycetes aspergillus nidulans and aspergillus oryzae.a gene encoding a pyranose 2-oxidase (pox; pyranose/oxygen 2-oxidoreductase; glucose 2-oxidase; ec 1.1.3.10) was identified in the genome of the ascomycete aspergillus nidulans. attempts to isolate pox directly from a. nidulans cultures or to homologously overexpress the native pox (under control of the constitutive gpda promoter) in a. nidulans were unsuccessful. cdna encoding pox was synthesized from mrna and expressed in escherichia coli, and the enzyme was subsequently purified and character ...201121968652
molecular characterization of the aspergillus nidulans fbxa encoding an f-box protein involved in xylanase induction.the filamentous fungus aspergillus nidulans has been used as a fungal model system to study the regulation of xylanase production. these genes are activated at transcriptional level by the master regulator the transcriptional factor xlnr and repressed by carbon catabolite repression (ccr) mediated by the wide-domain repressor crea. here, we screened a collection of 42 a. nidulans f-box deletion mutants grown either in xylose or xylan as the single carbon source in the presence of the glucose ana ...201122142781
Monitoring and assessment of airborne fungi in Kolkata, India, by viable and non-viable air sampling methods.The composition and variability of airborne fungal spores were studied using two complementary sampling methods in an outdoor environment in Kolkata suburb for 2 years, from November 2002 to October 2004. For monitoring the total fungal spore burden in the air, Burkard 7-day volumetric sampler was used, whereas Andersen two-sage viable sampler was used for isolating the cultivable airborne fungi. Among the 37 fungal spore types identified in the air samples, the predominant ones were Cladosporiu ...201121915605
extracellular proteinase formation in carbon starving aspergillus nidulans cultures--physiological function and regulation.extracellular proteinase formation in carbon depleted cultures of the model filamentous fungus aspergillus nidulans was studied to elucidate its regulation and possible physiological function. as demonstrated by gene deletion, culture optimization, microbial physiological and enzymological experiments, the prta and pepj proteinases of a. nidulans did not appear to play a decisive role in the autolytic decomposition of fungal cells under the conditions we tested. however, carbon starvation induce ...201121953444
Analysis of phytochemical constituents of Eucalyptus citriodora L. responsible for antifungal activity against post-harvest fungi.In vitro antifungal activity and phytochemical constituents of essential oil, aqueous, methanol and chloroform extract of Eucalyptus citriodora Hook leaves were investigated. A qualitative phytochemical analysis was performed for the detection of alkaloids, cardiac glycosides, flavonoids, saponins, sterols, tannins and phenols. Methanolic extract holds all identified biochemical constituents except for the tannin. While these biochemical constituents were found to be absent in essential oil, aqu ...201121999598
Involvement of a helix-loop-helix transcription factor CHC-1 in CO(2)-mediated conidiation suppression in Neurospora crassa.The morphological switch from vegetative growth to conidiation in filamentous fungi is highly regulated, but the understanding of the regulatory mechanisms is limited. In this study, by screening a set of knock-out mutants corresponding to 103 transcription factor encoding genes in Neurospora crassa, a mutant was found to produce abundant conidia in race tubes in which conidiation in the wild-type strain was suppressed. The corresponding gene NCU00749 encodes a protein containing a helix-loop-he ...201122001287
biosorption of as(iii) ions from aqueous solution using dry, heat-treated and naoh-treated aspergillus nidulans.the biosorption of as(iii) ions on dry, heat-treated and naoh-treated aspergillus nidulans in aqueous solutions was studied. the effect ofph (2-6), temperature (25, 30, 35, 45 degrees c), and initial concentration (250-700 mg l(-1)) of as(iii) ions were investigated in a batch system. the maximum biosorption rate of as(iii) ions on the tested biosorbent were obtained at ph 4 and 35 degrees c in about 240 min. the maximum biosorption capacities of dry, heat-treated and naoh-treated fungal biomass ...201121473283
glutathione reductase/glutathione is responsible for cytotoxic elemental sulfur tolerance via polysulfide shuttle in fungi.fungi that can reduce elemental sulfur to sulfide are widely distributed, but the mechanism and physiological significance of the reaction have been poorly characterized. here, we purified elemental sulfur-reductase (sr) and cloned its gene from the elemental sulfur-reducing fungus fusarium oxysporum. we found that nadph-glutathione reductase (gr) reduces elemental sulfur via glutathione as an intermediate. a loss-of-function mutant of the sr/gr gene generated less sulfide from elemental sulfur ...201121474441
purification and characterization of antifungal δ-dodecalactone from lactobacillus plantarum af1 isolated from kimchi.the aim of this study was to purify and identify an antifungal compound from lactobacillus plantarum af1, which was isolated from kimchi. the antifungal compound was purified by solid-phase extraction and recycling preparative high-performance liquid chromatography, and its structure was elucidated by using gas chromatography-mass spectrometry (gc-ms). the active compound from l. plantarum af1 was confirmed to be δ-dodecalactone (molecular weight, 198.3) by comparison of its gas chromatographic ...201121477483
cryptic aspergillus nidulans antimicrobials.secondary metabolite (sm) production by fungi is hypothesized to provide some fitness attribute for the producing organisms. however, most sm clusters are "silent" when fungi are grown in traditional laboratory settings, and it is difficult to ascertain any function or activity of these sm cluster products. recently, the creation of a chromatin remodeling mutant in aspergillus nidulans induced activation of several cryptic sm gene clusters. systematic testing of nine purified metabolites from th ...201121478304
regulation of pentose utilisation by arar, but not xlnr, differs in aspergillus nidulans and aspergillus niger.filamentous fungi are important producers of plant polysaccharide degrading enzymes that are used in many industrial applications. these enzymes are produced by the fungus to liberate monomeric sugars that are used as carbon source. two of the main components of plant polysaccharides are l: -arabinose and d: -xylose, which are metabolized through the pentose catabolic pathway (pcp) in these fungi. in aspergillus niger, the regulation of pentose release from polysaccharides and the pcp involves t ...201121484208
eisosomes and membrane compartments in the ascomycetes: a view from aspergillus nidulans.eisosomes are punctate structures located in the cytoplasmic side of the cell membrane of ascomycetes. in saccharomyces cerevisiae they coincide topologically with and are necessary for the organisation of specific membrane domains. the eisosomal proteins are universally and quite strictly conserved in the sub-phylum, however this evolutionary conservation is in apparent contradiction with an elusive functional significance. the comparative analysis of the eisosomes of s. cerevisiae and aspergil ...201121509182
enzymatic properties of the recombinant serine-type carboxypeptidase ocpc, which is unique to aspergillus oryzae.gene ao090103000153 is unique to aspergillus oryzae rib40 and a. flavus nrrl3357, and is speculated to encode a serine-type carboxypeptidase. in this study, we purified and characterized a heterologously expressed gene product of ao090103000153. 5'-rapid amplification of cdna ends indicated that the translation start site of the gene is located 1,586 bp downstream of the translation start site predicted by the genome sequencing project. the gene, starting from the revised translation start codon ...201121512241
agrobacterium tumefaciens-mediated transformation of the plant pathogenic fungus rosellinia necatrix.rosellinia necatrix is a soil-borne root pathogen affecting a wide range of commercially important plant species. the mycelium of r. necatrix was transformed to hygromycin b resistance by an agrobacterium tumefaciens-mediated transformation system using a binary plasmid vector containing the hygromycin b phosphotransferase (hph) gene controlled by the heterologous fungal aspergillus nidulans p-gpd (glyceraldehyde 3-phosphate dehydrogenase) promoter and the trpc terminator. co-cultivation of r. n ...201121513216
formation and stability of eisosomes in the filamentous fungus ashbya gossypii.one hallmark of the rapid expansion of the polar surface of fungal hyphae is the spatial separation of regions of exocytosis and endocytosis at hyphal tips, as recently shown for ashbya gossypii and aspergillus nidulans. to determine where cortex-associated eisosomes form with respect to these two regions, we monitored fluorescently marked eisosomes in a. gossypii. each minute, 1.6±0.5 eisosomes form within the first 30 μm of each hypha and are exclusively subapical of the endocytosis region. th ...201121525038
adaptation of the tokuyasu method for the ultrastructural study and immunogold labelling of filamentous fungi.the study of filamentous fungi is fundamental not only to extend their biotechnological applications, but also to develop new drugs to fight pathological species. morphological analyses are particularly relevant when investigating their development and differentiation. the need to maintain the orientation of hyphae and the presence of a cell wall, which hampers the sample infiltration with cryoprotectants and other reagents necessary to preserve the cell ultrastructure, creates difficulties with ...201121527426
structural features and chaperone activity of the nudc protein family.the nudc family consists of four conserved proteins with representatives in all eukaryotes. the archetypal nudc gene from aspergillus nidulans is a member of the nud gene family that is involved in the maintenance of nuclear migration. this family also includes nudf, whose human orthologue, lis1, codes for a protein essential for brain cortex development. three paralogues of nudc are known in vertebrates: nudc, nudc-like (nudcl), and nudc-like 2 (nudcl2). the fourth distantly related member of t ...201121530541
8-carbon oxylipins inhibit germination and growth, and stimulate aerial conidiation in aspergillus nidulans.germination of aspergillus nidulans conidia in liquid cultures was progressively inhibited at inoculum loads above 1×10(5)conidiaml(-1). high conidial densities also inhibited growth of neighbouring mycelia. the eight-carbon oxylipin 1-octen-3-ol was identified as the main inhibitor in a fraction also containing 3-octanone and 3-octanol. these three oxylipins also increased the conidiation rate of dark-grown surface cultures, but had no effect on liquid cultures. 3-octanone was the most conidiog ...201121530921
multifrequency electron paramagnetic resonance characterization of ppoa, a cyp450 fusion protein that catalyzes fatty acid dioxygenation.ppoa is a fungal dioxygenase that produces hydroxylated fatty acids involved in the regulation of the life cycle and secondary metabolism of aspergillus nidulans . it was recently proposed that this novel enzyme employs two different heme domains to catalyze two separate reactions: within a heme peroxidase domain, linoleic acid is oxidized to (8r)-hydroperoxyoctadecadienoic acid [(8r)-hpode]; in the second reaction step (8r)-hpode is isomerized within a p450 heme thiolate domain to 5,8-dihydroxy ...201121548577
transcription of the hsp30, hsp70, and hsp90 heat shock protein genes is modulated by the pala protein in response to acid ph-sensing in the fungus aspergillus nidulans.heat shock proteins are molecular chaperones linked to a myriad of physiological functions in both prokaryotes and eukaryotes. in this study, we show that the aspergillus nidulans hsp30 (anid_03555.1), hsp70 (anid_05129.1), and hsp90 (anid_08269.1) genes are preferentially expressed in an acidic milieu, whose expression is dependent on the pala (+) background under optimal temperature for fungal growth. heat shock induction of these three hsp genes showed different patterns in response to extrac ...201121553327
quantitative trait locus (qtl) mapping reveals a role for unstudied genes in aspergillus virulence.infections caused by the fungus aspergillus are a major cause of morbidity and mortality in immunocompromised populations. to identify genes required for virulence that could be used as targets for novel treatments, we mapped quantitative trait loci (qtl) affecting virulence in the progeny of a cross between two strains of a. nidulans (fgsc strains a4 and a91). we genotyped 61 progeny at 739 single nucleotide polymorphisms (snp) spread throughout the genome, and constructed a linkage map that wa ...201121559404
control of glucosylceramide production and morphogenesis by the bar1 ceramide synthase in fusarium graminearum.the contribution of plasma membrane proteins to the virulence of plant pathogenic fungi is poorly understood. accordingly, the objective of this study was to characterize the acyl-coa dependent ceramide synthase bar1 (previously implicated in plasma membrane organization) in the wheat pathogen fusarium graminearum. the role of bar1 in mediating cell membrane organization was confirmed as δbar1 mutants failed to display a distinct sterol-rich domain at the hyphal tip. the δbar1 mutants were non-p ...201121559419
functional characterization of rho gtpases in aspergillus niger uncovers conserved and diverged roles of rho proteins within filamentous fungi.rho gtpases are signalling molecules regulating morphology and multiple cellular functions including metabolism and vesicular trafficking. to understand the connection between polarized growth and secretion in the industrial model organism aspergillus niger, we investigated the function of all rho family members in this organism. we identified six rho gtpases in its genome and used loss-of-function studies to dissect their functions. while rhoa is crucial for polarity establishment and viability ...201121205013
characterization of aspergillus nidulans rabc/rab6.the aspergillus nidulans golgi is not stacked. early and late golgi equivalents (ges) are intermingled but can be resolved by epifluorescence microscopy. rabc, the aspergillus ortholog of mammalian rab6, is present across the golgi, preferentially associated with early ges near the tip and with late ges in tip-distal regions. rabc? mutants, showing markedly impaired apical extension, have conspicuously fragmented, brefeldin a-insensitive early and late ges, indicating that the golgi network orga ...201121226815
roles of the his-asp phosphorelay signal transduction system in controlling cell growth and development in aspergillus nidulans.the his-asp phosphorelay signal transduction system has been identified in most organisms, including bacteria, yeasts, fungi, and plants, except for animals. this system is important in adaptation to stress, control of cell growth, and induction of development in response to environmental changes. on the basis of genomic information, it has been found that aspergillus nidulans, a model species of fungi, includes 15 histidine kinases (hks), one histidine-containing phosphotransmitter protein (hpt ...201121228462
characterization of the conserved phosphorylation site in the aspergillus nidulans response regulator srra.ssk1- and skn7-type response regulators are widely conserved in fungal his-asp phosphorelay (two-component) signaling systems. srra, a skn7-type rr of aspergillus nidulans, is implicated not only in oxidative stress responses but also in osmotic adaptation, conidia production (asexual development), inhibition by fungicides, and cell wall stress resistance. here, we characterized srra, focusing on the role of the conserved aspartate residue in the receiver domain, which is essential for phosphore ...201121229249
effect of endoxylanase and a-l-arabinofuranosidase supplementation on the enzymatic hydrolysis of steam exploded wheat straw.the cost and hydrolytic efficiency of enzymes are major factors that restrict the commercialization of the bioethanol production process from lignocellulosic biomass. hemicellulases and other accessory enzymes are becoming crucial to increase enzymatic hydrolysis (eh) yields at low cellulase dosages. the aim of this work was to evaluate the effect of two recombinant hemicellulolytic enzymes on the eh of steam pretreated wheat straw. pretreatments at two severity conditions were performed and the ...201121262567
independent duplications of a-amylase in different strains of aspergillus oryzae.aspergillus oryzae is a filamentous fungus that has arisen through the ancient domestication of aspergillus flavus for making traditional oriental foods and beverages. in the many centuries a. oryzae has been used for fermenting the starch in rice to simple sugars, it has undergone selection for increased secretion of starch-degrading enzymes. in particular, all a. oryzae strains investigated thus far have two or more copies of a gene encoding a-amylase, whereas a. flavus has only one. here we i ...201121277379
the cytoskeletal protein ndel1 regulates dynamin 2 gtpase activity.cytoskeleton dynamics, membranes trafficking and positioning are essential for the proper functioning of any mammalian cell. the identification of the molecules and mechanisms that allow these cellular processes to interface is vital for understanding cell behaviors. ndel1, the mammalian homolog of the aspergillus nidulans nude, organizes the cytoskeleton and regulates molecular motors, thereby impacting on the positioning of membranes. hypothetically, ndel1 can act in concert with enzymes contr ...201121283621
role of carnitine acetyltransferases in acetyl coenzyme a metabolism in aspergillus nidulans.the flow of carbon metabolites between cellular compartments is an essential feature of fungal metabolism. during growth on ethanol, acetate, or fatty acids, acetyl units must enter the mitochondrion for metabolism via the tricarboxylic acid cycle, and acetyl coenzyme a (acetyl-coa) in the cytoplasm is essential for the biosynthetic reactions and for protein acetylation. acetyl-coa is produced in the cytoplasm by acetyl-coa synthetase during growth on acetate and ethanol while ß-oxidation of fat ...201121296915
the paf gene product modulates asexual development in penicillium chrysogenum.penicillium chrysogenum secretes a low molecular weight, cationic and cysteine-rich protein (paf). it has growth inhibitory activity against the model organism aspergillus nidulans and numerous zoo- and phytopathogenic fungi but shows only minimal conditional antifungal activity against the producing organism itself. in this study we provide evidence for an additional function of paf which is distinct from the antifungal activity against putative ecologically concurrent microorganisms. our data ...201121298690
aspergillus nidulans transcription factor atfa interacts with the mapk saka to regulate general stress responses, development and spore functions.fungi utilize a phosphorelay system coupled to a map kinase module for sensing and processing environmental signals. in aspergillus nidulans, response regulator sska transmits osmotic and oxidative stress signals to the stress mapk (sapk) saka. using a genetic approach together with gfp tagging and molecular bifluorescence we show that saka and atf/creb transcription factor atfa define a general stress-signalling pathway that plays differential roles in oxidative stress responses during growth a ...201121320182
human nek6 is a monomeric mostly globular kinase with an unfolded short n-terminal domain.the nima-related kinases (neks) are widespread among eukaryotes. in mammalians they represent an evolutionarily conserved family of 11 serine/threonine kinases, with 40-45% amino acid sequence identity to the aspergillus nidulans mitotic regulator nima within their catalytic domains. neks have cell cycle-related functions and were recently described as related to pathologies, particularly cancer, consisting in potential chemotherapeutic targets. human nek6, -7 and -9 are involved in the control ...201121320329
simultaneous detection and identification of aspergillus and mucorales species in tissues collected from patients with fungal rhinosinusitis.rapid detection and differentiation of aspergillus and mucorales species in fungal rhinosinusitis diagnosis are desirable, since the clinical management and prognosis associated with the two taxa are fundamentally different. we describe an assay based on a combination of broad-range pcr amplification and reverse line blot hybridization (pcr/rlb) to detect and differentiate the pathogens causing fungal rhinosinusitis, which include five aspergillus species (a. fumigatus, a. flavus, a. niger, a. t ...201121325541
acon-3, the neurospora crassa ortholog of the developmental modifier, meda, complements the conidiation defect of the aspergillus nidulans mutant.aspergillus nidulans and neurospora crassa are ascomycetes that produce asexual spores through morphologically distinct processes. meda, a protein with unknown function, is required for normal asexual and sexual development in a. nidulans. we determined that the n. crassa ortholog of meda is acon-3, a gene required for early conidiophore development and female fertility. to test hypotheses about the evolutionary origins of asexual development in distinct fungal lineages it is important to unders ...201121220038
homologous overexpression of xylanase in fusarium oxysporum increases ethanol productivity during consolidated bioprocessing (cbp) of lignocellulosics.in an effort to increase ethanol productivity during the consolidated bioprocessing (cbp) of lignocellulosics by fusarium oxysporum, we attempted the constitutive homologous overexpression of one of the key process enzymes, namely an endo-xylanase. the endo-β-1,4-xylanase 2 gene was incorporated into the f. oxysporum genome under the regulation of the gpda promoter of aspergillus nidulans. the transformation was effected through agrobacterium tumefaciens and resulted in 12 transformants, two of ...201121237221
maximal release of highly bifidogenic soluble dietary fibers from industrial potato pulp by minimal enzymatic treatment.potato pulp is a poorly utilized, high-volume co-processing product resulting from industrial potato starch manufacturing. potato pulp mainly consists of the tuber plant cell wall material and is particularly rich in pectin, notably galactan branched rhamnogalacturonan i type pectin which has previously been shown to exhibit promising properties as dietary fiber. the objective of this study was to solubilize dietary fibers from potato pulp by a one-step minimal treatment procedure and evaluate t ...201121253720
onsite bio-detoxification of steam-exploded corn stover for cellulosic ethanol production.in the process of ethanol production from steam-exploded corn stover (secs), a cellulose-degradation strain of aspergillus nidulans (flz10) was investigated whether it could remove the inhibitors released from steam exploded pretreatment , and thereby be used for biological detoxification on saccharomycescerevisiae. the results showed that flz10 removed 75.2% formic acid, 53.6% acetic acid, and 100% hydroxymethyl furfural (5-hmf) and furfural from the hydrolysate washed from secs after 72h culti ...201121334878
quantifying the importance of galactofuranose in aspergillus nidulans hyphal wall surface organization by atomic force microscopy.the fungal wall mediates cell-environment interactions. galactofuranose (galf), the five-member ring form of galactose, has a relatively low abundance in aspergillus walls yet is important for fungal growth and fitness. aspergillus nidulans strains deleted for galf biosynthesis enzymes ugea (udp-glucose-4-epimerase) and ugma (udp-galactopyranose mutase) lacked immunolocalizable galf, had growth and sporulation defects, and had abnormal wall architecture. we used atomic force microscopy and force ...201121335527
genome-based deletion analysis reveals the prenyl xanthone biosynthesis pathway in aspergillus nidulans.xanthones are a class of molecules that bind to a number of drug targets and possess a myriad of biological properties. an understanding of xanthone biosynthesis at the genetic level should facilitate engineering of second-generation molecules and increasing production of first-generation compounds. the filamentous fungus aspergillus nidulans has been found to produce two prenylated xanthones, shamixanthone and emericellin, and we report the discovery of two more, variecoxanthone a and epishamix ...201121351751
influence of substrate dideuteration on the reaction of the bifunctional heme enzyme psi factor producing oxygenase a (ppoa).ppoa is a bifunctional enzyme that catalyzes the dioxygenation of unsaturated c18 fatty acids. the products of this reaction are termed psi factors and have been shown to play a crucial role in conferring a balance between sexual and asexual spore development as well as production of secondary metabolites in the fungus aspergillus nidulans. studies on the reaction mechanism revealed that ppoa uses two different heme domains to catalyze two subsequent reactions. initially, the fatty acid substrat ...201121365732
restoration of anti-aspergillus defense by neutrophil extracellular traps in human chronic granulomatous disease after gene therapy is calprotectin-dependent.aspergillus spp infection is a potentially lethal disease in patients with neutropenia or impaired neutrophil function. we showed previously that aspergillus hyphae, too large for neutrophil phagocytosis, are inhibited by reactive oxygen species-dependent neutrophil extracellular trap (net) formation. this process is defective in chronic granulomatous disease (cgd) because of impaired phagocyte nicotinamide adenine dinucleotide phosphate (nadph) oxidase function.201121376380
fluorinated substrates result in variable leakage of a reaction intermediate during catalysis by dehydroquinate synthase.incubation of (3s)-3-fluoro-3-deoxy-d-arabino-heptulosonate 7-phosphate with dehydroquinate (dhq) synthase from three phylogenetically distinct sources resulted in the production of (6s)-6-fluorodhq and its epimer 1-epi-(6s)-6-fluorodhq. the differences in the product ratios of the reactions catalysed by each enzyme imply that 1-epi-(6s)-6-fluorodhq formation occurs by an unusual partial leakage of a reaction intermediate from the enzyme.201121387027
the aspergillus nidulans cenp-e kinesin motor kipa interacts with the fungal homologue of the centromere-associated protein cenp-h at the kinetochore.chromosome segregation is an essential process for nuclear and cell division. the microtubule cytoskeleton, molecular motors and protein complexes at the microtubule plus ends and at kinetochores play crucial roles in the segregation process. here we identified kata (kipatarget protein, homologue of cenp-h) as a kinesin-7 (kipa, homologue of human cenp-e) interacting protein in aspergillus nidulans. kata located at the kinetochore during the whole cell cycle and colocalized with kipa and partial ...201121392133
agrobacterium tumefasciens-mediated transformation of the aquatic fungus blastocladiella emersonii.agrobacterium tumefaciens is widely used for plant dna transformation and more recently, has also been used to transform yeast, filamentous fungi and even human cells. using this technique, we developed the first transformation protocol for the saprobic aquatic fungus blastocladiella emersonii, a blastocladiomycete localized at the base of fungal phylogenetic tree, which has been shown as a promising and interesting model of study of cellular function and differentiation. we constructed binary t ...201121396477
versatile enzyme expression and characterization system for aspergillus nidulans, with the penicillium brevicompactum polyketide synthase gene from the mycophenolic acid gene cluster as a test case.assigning functions to newly discovered genes constitutes one of the major challenges en route to fully exploiting the data becoming available from the genome sequencing initiatives. heterologous expression in an appropriate host is central in functional genomics studies. in this context, filamentous fungi offer many advantages over bacterial and yeast systems. to facilitate the use of filamentous fungi in functional genomics, we present a versatile cloning system that allows a gene of interest ...201121398493
how protein kinases co-ordinate mitosis in animal cells.mitosis is associated with profound changes in cell physiology and a spectacular surge in protein phosphorylation. to accomplish these, a remarkably large portion of the kinome is involved in the process. in the present review, we will focus on classic mitotic kinases, such as cyclin-dependent kinases, polo-like kinases and aurora kinases, as well as more recently characterized players such as nima (never in mitosis in aspergillus nidulans)-related kinases, greatwall and haspin. together, these ...201121406064
completing the purine utilisation pathway of aspergillus nidulans.we have previously identified by classical genetics and biochemistry, all the genes of aspergillus nidulans predicted to be involved in purine utilisation, together with cognate regulatory genes and one gene encoding a novel xanthine hydroxylation activity. in this article we complete the description of the purine utilisation pathway with the identification of the two genes (uax and uaw) encoding the enzymes catalysing the conversion of the product of urate oxidation by urate oxidase, 5-hydroxyi ...201121419234
wild-type mic distributions and epidemiological cutoff values for caspofungin and aspergillus spp. for the clsi broth microdilution method (m38-a2 document).clinical breakpoints have not been established for mold testing. epidemiologic cutoff values (ecvs) are available for six aspergillus spp. and the triazoles, but not for caspofungin. wild-type (wt) minimal effective concentration (mec) distributions (organisms in a species-drug combination with no acquired resistance mechanisms) were defined in order to establish ecvs for six aspergillus spp. and caspofungin. the number of available isolates was as follows: 1,691 a. fumigatus, 432 a. flavus, 192 ...201121422219
elucidation of functional markers from aspergillus nidulans developmental regulator flbb and their phylogenetic distribution.aspergillus nidulans is a filamentous fungus widely used as a model for biotechnological and clinical research. it is also used as a platform for the study of basic eukaryotic developmental processes. previous studies identified and partially characterized a set of proteins controlling cellular transformations in this ascomycete. among these proteins, the bzip type transcription factor flbb is a key regulator of reproduction, stress responses and cell-death. our aim here was the prediction, thro ...201121423749
peritonitis due to aspergillus nidulans and its effective treatment with voriconazole: the first case report. 201121427255
nmr structure of the c-terminal domain of a tyrosyl-trna synthetase that functions in group i intron splicing.the mitochondrial tyrosyl-trna synthetases (mt tyrrss) of pezizomycotina fungi are bifunctional proteins that aminoacylate mitochondrial trna(tyr) and are structure-stabilizing splicing cofactors for group i introns. studies with the neurospora crassa synthetase (cyt-18 protein) showed that splicing activity is dependent upon pezizomycotina-specific structural adaptations that form a distinct group i intron-binding site in the n-terminal catalytic domain. although cyt-18's c-terminal domain also ...201121438536
Displaying items 801 - 900 of 5149