Publications

TitleAbstractYear
Filter
PMID(sorted ascending)
Filter
murine infection models for aspergillus terreus pulmonary aspergillosis reveal long-term persistence of conidia and liver degeneration.aspergillus terreus is emerging as a causative agent of life-threatening invasive aspergillosis. prognosis for affected patients is often worse than for a. fumigatus infections. to study a. terreus-mediated disease, we developed 3 infection models. in embryonated hen's eggs and leucopenic mice, the outcome of invasive aspergillosis was similar to that described for a. fumigatus. however, 10(2)- and 10(3)-fold higher conidia concentrations were required for 100% lethality. in corticosteroid-treat ...201222438397
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
screening of medicinal higher basidiomycetes mushrooms from turkey for lovastatin production.as a first attempt, a study was carried out to test for lovastatin production ability in local higher basidiomycetes mushroom isolates from turkey. an extended screening was performed for lovastatin production in yeast lactose agar medium, among a total of 136 macrofungi isolates from the basidiomycetes culture collection of eskisehir osmangazi university. lovastatin production was evaluated by disc diffusion method and was also confirmed by tlc and hplc. only six isolates were found to be lovas ...201222506575
in vitro and in vivo role of heat shock protein 90 in amphotericin b resistance of aspergillus terreus.aspergillus terreus (a. terreus) is of serious concern because of a high propensity to dissemination and in vitro and in vivo resistance to amphotericin b (amb). the underlying molecular mechanism of amb is not known yet and here we want to explore whether fungal heat shock protein 90 (hsp90) is involved in polyene resistance in a. terreus. amb-susceptible (ats) and amb-resistant (atr) a. terreus and amb-susceptible aspergillus fumigatus (afs) were investigated in response to amb with a special ...201322515428
rapid identification of aspergillus terreus from bronchoalveolar lavage fluid by pcr and electrospray ionization with mass spectrometry.we describe the application of pcr and electrospray-ionization with mass spectrometry (pcr/esi-ms) to culture-negative bronchoalveolar lavage (bal) fluid in order to identify septate hyphae noted by gomori methenamine silver (gms) staining of the fluid that was obtained from an immunocompromised woman with neutropenia following induction chemotherapy for treatment of acute myelogenous leukemia (aml). the patient was treated with empirical antifungal therapy, including intrathecal amphotericin b, ...201222518857
operating conditions optimization for (+)-terrein production in a stirred bioreactor by aspergillus terreus strain pf-26 from marine sponge phakellia fusca.terrein is a fungal metabolite with application values in the fields of medicine, cosmetology, and agriculture. however, mass production of single configuration terrein is still a big challenge. in this study, operating factors such as inoculation, agitation speed, aeration rate, ph control, and nutrient feeding were preliminarily optimized to improve the (+)-terrein production in the 5-l stirred bioreactor from the marine sponge-derived fungus aspergillus terreus pf-26. spore inoculation, low a ...201222527032
optimization of culture conditions and bench-scale production of l-asparaginase by submerged fermentation of aspergillus terreus mtcc 1782.optimization of culture conditions for l-asparaginase production by submerged fermentation of aspergillus terreus mtcc 1782 was studied using a 3-level central composite design of response surface methodology and artificial neural network linked genetic algorithm. the artificial neural network linked genetic algorithm was found to be more efficient than response surface methodology. the experimental l-asparaginase activity of 43.29 iu/ml was obtained at the optimum culture conditions of temperat ...201222580311
biochemical characterization of a gh53 endo-β-1,4-galactanase and a gh35 exo-β-1,4-galactanase from penicillium chrysogenum.an endo-β-1,4-galactanase (pcgal1) and an exo-β-1,4-galactanase (pcgalx35c) were purified from the culture filtrate of penicillium chrysogenum 31b. pcgal1 and pcgalx35c cdnas encoding pcgal1 and pcgalx35c were isolated by in vitro cloning. the deduced amino acid sequences of pcgal1 and pcgalx35c are highly similar to a putative endo-β-1,4-galactanase of aspergillus terreus (70% amino acid identity) and a putative β-galactosidase of neosartorya fischeri (72%), respectively. pfam analysis revealed ...201322584433
single cell oil of oleaginous fungi from the tropical mangrove wetlands as a potential feedstock for biodiesel.single cell oils (scos) accumulated by oleaginous fungi have emerged as a potential alternative feedstock for biodiesel production. though fungi from mangrove ecosystem have been reported for production of several lignocellulolytic enzymes, they remain unexplored for their sco producing ability. thus, these oleaginous fungi from the mangrove ecosystem could be suitable candidates for production of scos from lignocellulosic biomass. the accumulation of lipids being species specific, strain select ...201222646719
six novel constitutive promoters for metabolic engineering of aspergillus niger.genetic tools for the fine-tuning of gene expression levels are a prerequisite for rational strain optimization through metabolic engineering. while aspergillus niger is an industrially important fungus, widely used for production of organic acids and heterologous proteins, the available genetic tool box for this organism is still rather limited. here, we characterize six novel constitutive promoters of a. niger providing different expression levels. the selection of the promoters was based on p ...201322707054
biosynthesis of xylobiose: a strategic way to enrich the value of oil palm empty fruit bunch fiber.xylooligosaccharides are functional foods mainly produced during the hydrolysis of xylan by physical, chemical, or enzymatic methods. in this study, production of xylobiose was investigated using oil palm empty fruit bunch fiber (opefb) as a source material, by chemical and enzymatic methods. xylanase-specific xylan hydrolysis followed by xylobiose production was observed. among different xylanases, xylanase from fxy-1 released maximum xylobiose from pretreated opefb fiber, and this fungal strai ...201222713984
microbial production of itaconic acid: developing a stable platform for high product concentrations.biotechnologically produced itaconic acid (ia) is a promising organic acid with a wide range of applications and the potential to open up new application fields in the area of polymer chemistry, pharmacy, and agriculture. in this study, a systematic process optimization was performed with an own isolated strain of aspergillus terreus and transferred from a 250-ml to a 15-l scale. an ia concentration of 86.2 g/l was achieved within 7 days with an overall productivity of 0.51 g/(l h), a maximum pr ...201222752264
a small molecule ifb07188 inhibits proliferation of human cancer cells by inducing g2/m cell cycle arrest and apoptosis.a small molecule, 15b-β-hydroxy-5-n-acetylardeemin (ifb07188), was previously isolated from the fungi aspergillus terreus. however, the toxicological features of this natural product have never been investigated. in present study, we described the anticancer activities of ifb07188. we found that ifb07188 can decrease the viability and invasive potency of multiple cancer cell lines. further mechanistic investigation demonstrates that cell cycles are arrested at g2/m phase and the arrest is induce ...201222770989
microbial transformation of the sesquiterpene lactone tagitinin c by the fungus aspergillus terreus.the biotransformation of the sesquiterpene lactone tagitinin c by the fungus aspergillus terreus mt 5.3 yielded a rare derivative that was elucidated by spectrometric methods. the fungus led to the formation of a different product through an unusual epoxidation reaction between c4 and c5, formation of a c3,c10 ether bridge, and a methoxylation of the c1 of tagitinin c. the chemical structure of the product, namely 1β-methoxy-3α-hydroxy-3,10β-4,5α-diepoxy-8β-isobutyroyloxygermacr-11(13)-en-6α,12- ...201222782617
in vivo emergence of aspergillus terreus with reduced azole susceptibility and a cyp51a m217i alteration.azole resistance in aspergillus terreus isolates was explored. twenty related (mb) and 6 unrelated a. terreus isolates were included. cyp51a sequencing and rapd genotyping was performed. five mb isolates were itraconazole susceptible, whereas the minimum inhibitory concentrations (mics) for 15 mb isolates were elevated (1-2 mg/l). voriconazole and posaconazole mics were 0.5-4 and 0.06-0.5 mg/l, respectively, for mb isolates but 0.25-0.5 and <0.03-0.06 mg/l, respectively, for controls. sequencing ...201222782947
antimicrobial and synergistic effects of silver nanoparticles synthesized using soil fungi of high altitudes of eastern himalaya.fifty three fungi isolated from soils of different microhabitats of eastern himalayan range (3,400~3,600 msl) were screened for mycosynthesis of silver nanaoparticles (agnps) and their efficacy as antimicrobials were assessed in combination with commonly used antibiotics. three isolates aspergillus terreus sp5, paecilomyces lilacinus sf1 and fusarium sp. mp5 identified based on morphological and 18s rrna gene sequences were found to synthesize agnps. these nanoparticles were characterized by vis ...201222783131
[anaerobic growth ability and alcohol fermentation activity of microscopic fungi].the method proposed in this study was used to isolate fungi grown under anaerobic conditions and to reveal distinctions in their abundance and species composition in different habitats. the ability of micromycetes of different taxa to grow under anaerobic conditions and ensure alcohol fermentation was determined for a representative sample (344 strains belonging to more than 60 species). the group of fungi growing under anaerobic conditions included species with high, moderate, and low fermentat ...201122808743
studies on the metabolism of five model drugs by fungi colonizing cadavers using lc-esi-ms/ms and gc-ms analysis.it is well-known that cadavers may be colonized by microorganisms, but there is limited information if or to what extent these microbes are capable of metabolizing drugs or poisons, changing the concentrations and metabolic pattern of such compounds in postmortem samples. the aim of the present study was to develop a fungal biotransformation system as an in vitro model to investigate potential postmortem metabolism by fungi. five model drugs (amitriptyline, metoprolol, mirtazapine, promethazine, ...201222825674
production of cellulases by solid state fermentation with aspergillus terreus and enzymatic hydrolysis of mild alkali-treated rice straw.rice straw was used as substrate for cellulase production by solid state fermentation with aspergillus terreus. substrate concentration, moisture ratio, inoculum size and initial ph were optimized using response surface methodology involving box-behnken design. the predicted filter paper activity under optimized parameters was 9.73 u/g and the validated filter paper activity was 10.96 u/g. hydrolysis of the biomass pretreated with 0.125% to 1% naoh for 24h at room temperature was performed using ...201222864171
clinical epidemiology of 960 patients with invasive aspergillosis from the path alliance registry.the study investigated the epidemiology and outcome of invasive aspergillosis (ia), an important cause of morbidity and mortality in immunocompromised patients.201222898389
a new β-glucuronidase inhibiting butyrolactone from the marine endophytic fungus aspergillus terreus.an endophytic fungus aspergillus terreus, var. boedijnii (blochwitz) was isolated from red marine alga laurencia ceylanica, j. agardh, cultured in large scale and extracted with etoac. the above-mentioned extract yielded a new butyrolactone, 3-hydroxy-4-(4-hydroxyphenyl)-5-methoxycarbonyl-5-(4-hydroxy-3-formylbenzyl)-2,5-dihydro-2-furanone (1), along with the previously reported nine compounds, butyrolactone-1 (2), 6-hydroxymellin (3), (3 r, 4 r)-6,7-dimethoxy-4-hydroxymellin (4), (+)-territonin ...201322913423
enhanced itaconic acid production in aspergillus niger using genetic modification and medium optimization.aspergillus niger was selected as a host for producing itaconic acid due to its versatile and tolerant character in various growth environments, and its extremely high capacity of accumulating the precursor of itaconic acid: citric acid. expressing the cad gene from aspergillus terreus opened the metabolic pathway towards itaconic acid in a. niger. in order to increase the production level, we continued by modifying its genome and optimizing cultivation media.201222925689
animal bone char solubilization with itaconic acid produced by free and immobilized aspergillus terreus grown on glycerol-based medium.cells of aspergillus terreus, free and immobilized in polyurethane foam, were employed in itaconic acid fermentation processes on glycerol-based media. the purpose was to assess their suitability for animal bone char solubilization and the development of a biotechnological alternative to p fertilizers chemically produced from rock phosphate. animal bones constitute a renewable source of p that can replace the traditionally used finite, nonrenewable rock phosphate as a p source. glycerol was an e ...201222956279
furandiones from an endophytic aspergillus terreus residing in malus halliana.two new furandiones named asperterone b (1) and c (2) together with four known metabolites (3-6) were isolated from the liquid culture of the endophytic fungus aspergillus terreus mhl-p22 residing in the fresh leaves of malus halliana. the structures of the new compounds were elucidated by analysis of their ms, ir, 1d- and 2d-nmr spectra. 1 and 2 showed moderate cytotoxic activities against human colorectal carcinoma sw1116 cells with ic(50) values of 57.5 and 71.0 µm, respectively. the biosynth ...201222971827
effect of ph on biosynthesis of lovastatin and other secondary metabolites by aspergillus terreus atcc 20542.the effect of the initial ph value of the cultivation medium on lovastatin (mevinolinic acid) biosynthesis by aspergillus terreus atcc20542 was studied. it was found that if the ph value of the broth is acidic, the direct chromatographic assay of mevinolinic acid leads to the underestimated values. thus, the equilibrium curve was determined for the transformation of β-hydroxy acid form of lovastatin (mevinolinic acid) into lovastatin lactone. the calculation of the equilibrium constant shows tha ...201222995742
evolutionary imprint of catalytic domains in fungal pks-nrps hybrids.fungal hybrid enzymes consisting of a polyketide synthase (pks) and a nonribosomal peptide synthetase (nrps) module are involved in the biosynthesis of a vast array of ecologically and medicinally relevant natural products. whereas a dozen gene clusters could be assigned to the requisite pks-nrps pathways, the programming of the multifunctional enzymes is still enigmatic. through engineering and heterologously expressing a chimera of pks (lovastatin synthase, lovb) and nrps (cytochalasin synthas ...201223023987
bioremediation of heavy metals in liquid media through fungi isolated from contaminated sources.wastewater particularly from electroplating, paint, leather, metal and tanning industries contain enormous amount of heavy metals. microorganisms including fungi have been reported to exclude heavy metals from wastewater through bioaccumulation and biosorption at low cost and in eco-friendly way. an attempt was, therefore, made to isolate fungi from sites contaminated with heavy metals for higher tolerance and removal of heavy metals from wastewater. seventy-six fungal isolates tolerant to heavy ...201123024411
sexual reproduction in the opportunistic human pathogen aspergillus terreus.aspergillus terreus has a worldwide distribution in soil, constitutes the third most important cause of invasive aspergillosis in humans and is classically regarded as a strictly asexual species. strains of a. terreus were characterized by its, β-tubulin and calmodulin sequences. mating type was identified by amplifying and sequencing mat1-1 and mat1-2 genes. one mat1-2 strain produced hyphal masses when crossed with four mat1-1 strains on mixed cereal agar after 3 wk at 37 c. cleistothecia form ...201323074177
enhanced production of (+)-terrein in fed-batch cultivation of aspergillus terreus strain pf26 with sodium citrate.(+)-terrein is a fungal metabolite with multiple biological activities, especially with great value in medicine. however, the mass production of single configuration terrein is still a big challenge. in this study, the effects of acetic acid, sodium acetate, citric acid and sodium citrate on the (+)-terrein production by aspergillus terreus strain pf26 derived from marine sponge phakellia fusca were investigated. sodium citrate was selected for fed-batch cultivation because it showed the best ef ...201323085955
lovastatin production by aspergillus terreus using agro-biomass as substrate in solid state fermentation.ability of two strains of aspergillus terreus (atcc 74135 and atcc 20542) for production of lovastatin in solid state fermentation (ssf) using rice straw (rs) and oil palm frond (opf) was investigated. results showed that rs is a better substrate for production of lovastatin in ssf. maximum production of lovastatin has been obtained using a. terreus atcc 74135 and rs as substrate without additional nitrogen source (157.07 mg/kg dry matter (dm)). although additional nitrogen source has no benefit ...201223118499
butyrolactone and cycloheptanetrione from mangrove-associated fungus aspergillus terreus.a new butyrolactone, 7″-hydroxybutyrolactone iii (1) and three new cycloheptanetriones, terretrione a-c (2-4), together with five known compounds, butyrolactone i, cyclo(leu-pro), cyclo(val-pro), cyclo(ile-pro), cyclo(phe-pro), were isolated from mangrove-associated marine fungus aspergillus terreus. the structures of these compounds were elucidated on the basis of physical data analysis (nmr, high resolution-electrospray ionization (hr-esi)-ms), especially by 2d-nmr techniques. these compounds ...201223124567
free chlorine inactivation of fungi in drinking water sources.the effectiveness of free chlorine for the inactivation of fungi present in settled surface water was tested. in addition, free chlorine inactivation rate constants of cladosporium tenuissimum, cladosporium cladosporioides, phoma glomerata, aspergillus terreus, aspergillus fumigatus, penicillium griseofulvum, and penicillium citrinum that were found to occur in different source waters were determined in different water matrices (laboratory grade water and settled water). the effect of using diff ...201323164218
[invasive fungal infections in immunocompromised patients with focus on aspergillosis and its causative agents].invasive fungal diseases (ifd) are a life-threatening infectious complications in immunocompromised patients and are associated with high rate of morbidity and mortality. the most common invasive mycosis in patients who underwent an allogeneic hematopoietic stem cell transplantation is invasive aspergilosis (ia), most frequently caused by the clinically dominant species aspergillus fumigatus and, rarely, also by aspergillus flavus, aspergillus terreus and aspergillus niger. in recent years, othe ...201223172020
a novel pathway construction in candida tropicalis for direct xylitol conversion from corncob xylan.in this study, an integrated xylitol production pathway, directly using xylan as the substrate, was constructed in candida tropicalis bit-xol-1 which could efficiently convert xylose into xylitol. in order to consolidate this bioprocessing, a β-1,4-xylanase gene (atn) and a β-xylosidase gene (atl) were cloned from aspergillus terreus, and were constructed onto episomal plasmid paur123. additionally, combination of the individual atn and atl expression cassette was also cloned onto paur123. after ...201323211479
in vitro activity of a new oral glucan synthase inhibitor (mk-3118) tested against aspergillus spp. by clsi and eucast broth microdilution methods.mk-3118, a glucan synthase inhibitor derived from enfumafungin, and comparator agents were tested against 71 aspergillus spp., including itraconazole-resistant strains (mic, ≥ 4 μg/ml), using clsi and eucast reference broth microdilution methods. the clsi 90% minimum effective concentration (mec(90))/mic(90) values (μg/ml) for mk-3118, amphotericin b, and caspofungin, respectively, were as follows: 0.12, 2, and 0.03 for aspergillus flavus species complex (sc); 0.25, 2, and 0.06 for aspergillus f ...201323229479
isolation and characterization of three fungi with the potential of transforming glycyrrhizin.three fungi with different types of transformation of glycyrrhizin (gl) were isolated from the soil samples of glycyrrhiza glabra planting area in china. according to their morphologies and 18 s rdna gene sequence analysis, the three fungi were identified and named as penicillium purpurogenum li-3, aspergillus terreus li-20 and aspergillus ustus li-62. transforming products analysis by tlc and hplc-ms indicated that p. purpurogenum li-3, a. terreus li-20 and a. ustus li-62 could stably transform ...201323247917
coupled production of single cell oil as biodiesel feedstock, xylitol and xylanase from sugarcane bagasse in a biorefinery concept using fungi from the tropical mangrove wetlands.this work evaluates sugarcane bagasse (scb) conversion, in a biorefinery approach, to coproduce biodiesel and high value products using two novel mangrove fungi. on acid pre-treatment, sugarcane bagasse hydrolysate (scbh) resulted in a xylitol yield of 0.51 g/g xylose consumed in 72 h by williopsis saturnus. after scb pretreatment, sugarcane bagasse residue (scbr) was utilized using aspergillus terreus for production of xylanase (12.74 u/ml) and cell biomass (9.8 g/l) which was extracted for sin ...201323260270
chronic candidal bronchitis: a consecutive series.persistent candida from fungal cultures of respiratory secretions are often ignored and not treated due to assumptions concerning benign colonization.201223264835
structure revision of asperjinone using computer-assisted structure elucidation methods.the elucidated structure of asperjinone (1), a natural product isolated from thermophilic aspergillus terreus, was revised using the expert system structure elucidator. the reliability of the revised structure (2) was confirmed using 180 structures containing the (3,3-dimethyloxiran-2-yl)methyl fragment (3) as a basis for comparison and whose chemical shifts contradict the suggested structure (1).201323289877
mic values of voriconazole are predictive of treatment results in murine infections by aspergillus terreus species complex.we evaluated the efficacy of voriconazole against nine strains of aspergillus terreus with different mics (0.12 to 4 μg/ml) by using a murine model. markers of efficacy included survival, tissue burden, galactomannan antigenemia, and drug serum levels. voriconazole was especially effective in prolonging survival and reducing the fungal load in infections by strains that showed mics that were less than or equal to the epidemiological cutoff value (1 μg/ml). in vitro data might be useful for predi ...201323295929
itaconic acid--a biotechnological process in change.in the last years, itaconic acid has gained increasing interest as future bio-based platform chemical. to replace petrol-based compounds such as methacrylic acid in industry, the economic efficiency of the current biotechnological production processes with the fungus aspergillus terreus has to be improved. the recent progress in understanding the biosynthesis, the regulation and the cellular transport of itaconic acid has facilitated the optimisation of existing processes as well as the construc ...201323298766
new insight into amphotericin b resistance in aspergillus terreus.amphotericin b (amb) is the predominant antifungal drug, but the mechanism of resistance is not well understood. we compared the in vivo virulence of an amb-resistant aspergillus terreus (atr) isolate with that of an amb-susceptible a. terreus isolate (ats) using a murine model for disseminated aspergillosis. furthermore, we analyzed the molecular basis of intrinsic amb resistance in vitro by comparing the ergosterol content, cell-associated amb levels, amb-induced intracellular efflux, and proo ...201323318794
inhibitory and fungicidal effects of antifungal drugs against aspergillus species in the presence of serum.given the high protein binding rates of antifungal drugs and the effect of serum proteins on aspergillus growth, we investigated the in vitro pharmacodynamics of amphotericin b, voriconazole, and three echinocandins in the presence of human serum, assessing both inhibitory and fungicidal effects. in vitro inhibitory (ic) and fungicidal (fc) concentrations against 5 isolates of aspergillus fumigatus, aspergillus flavus, and aspergillus terreus were determined with a clsi m38-a2-based microdilutio ...201323318807
characterization of the biosynthetic genes for 10,11-dehydrocurvularin, a heat shock response-modulating anticancer fungal polyketide from aspergillus terreus.10,11-dehydrocurvularin is a prevalent fungal phytotoxin with heat shock response and immune-modulatory activities. it features a dihydroxyphenylacetic acid lactone polyketide framework with structural similarities to resorcylic acid lactones like radicicol or zearalenone. a genomic locus was identified from the dehydrocurvularin producer strain aspergillus terreus ah-02-30-f7 to reveal genes encoding a pair of iterative polyketide synthases (a. terreus curs1 [atcurs1] and atcurs2) that are pred ...201323335766
severe bacterial superinfection based on influenza a (h1n1) pneumonia in a heart-lung transplant recipient.a 47-year-old heart-lung transplant recipient presented to our outpatient transplant clinic with respiratory infection. her nose and throat swabs for influenza a (h1n1) infection were negative. broncheoalveolar lavage showed a positive result for h1n1 infection. antiviral therapy was initiated. because of superinfection with pseudomonas aeruginosa and aspergillus terreus, her clinical condition worsened. the clinical condition of the patient improved with antibiotic and antifungal treatment. neg ...201323344758
high-dose induction liposomal amphotericin b followed by de-escalation is effective in experimental aspergillus terreus pneumonia.aspergillus terreus is considered to be resistant to amphotericin b (amb). however, it is unknown whether higher daily doses of liposomal amb (l-amb) can overcome this resistance in vivo. we evaluated the efficacy and total lung homogenate amb concentrations of escalating intravenous doses of l-amb (3-20 mg/kg daily) versus an induction-de-escalation dosing strategy (10 mg/kg/day ×3 days, then 3 mg/kg/day) in an experimental neutropenic murine model of a. terreus pneumonia.201323349440
evaluation of oil removal efficiency and enzymatic activity in some fungal strains for bioremediation of petroleum-polluted soils. 201223369665
reduced by-product formation and modified oxygen availability improve itaconic acid production in aspergillus niger.aspergillus niger has an extraordinary potential to produce organic acids as proven by its application in industrial citric acid production. previously, it was shown that expression of the cis-aconitate decarboxylase gene (cada) from aspergillus terreus converted a. niger into an itaconic acid producer (li et al., fungal genet bio 48: 602-611, 2011). after some initial steps in production optimization in the previous research (li et al., bmc biotechnol 12: 57, 2012), this research aims at modify ...201323397482
aspulvinones from a mangrove rhizosphere soil-derived fungus aspergillus terreus gwq-48 with anti-influenza a viral (h1n1) activity.a new butenolide isoaspulvinone e (1), together with two known butenolides aspulvinone e (2) and pulvic acid (3) were isolated from the marine-derived fungus, aspergillus terreus gwq-48. they showed significant anti-influenza a h1n1 virus activities, with ic50 values of 32.3, 56.9, and 29.1μg/ml, respectively. moreover, only compound 1 exhibited effective inhibitory activity against h1n1 viral neuraminidase (na), and docking of two isomers (1-2) into the active sites of na showed that the e doub ...201323411074
terrein induces apoptosis in hela human cervical carcinoma cells through p53 and erk regulation.terrein, a fungal metabolite derived from aspergillus terreus, has been shown to have a variety of biological activities in human cells including inhibition of melanogenesis, as well as anti-inflammatory, antioxidant and anticancer properties. in the present study, terrein was shown to have marked anticancer activity on hela human cervical carcinoma cells. terrein exhibited inhibition of proliferation within the same ranges for other cancer cell types with an ic50 at 0.29 mm. the growth inhibiti ...201323417151
biochemistry of microbial itaconic acid production.itaconic acid is an unsaturated dicarbonic acid which has a high potential as a biochemical building block, because it can be used as a monomer for the production of a plethora of products including resins, plastics, paints, and synthetic fibers. some aspergillus species, like a. itaconicus and a. terreus, show the ability to synthesize this organic acid and a. terreus can secrete significant amounts to the media (>80 g/l). however, compared with the citric acid production process (titers >200 g ...201323420787
aspergillus terreus complex: an emergent opportunistic agent of onychomycosis.the incidence of onychomycosis due to non-dermatophyte moulds (ndm) is increasing. aspergillus terreus is relatively undocumented as an agent of this fungal infection. the aim of this work is to show the prevalence of onychomycosis caused by a. terreus and to describe its clinical features. nail samples were collected for microscopic examination and culturing in selective media. all cases of onychomycosis due to ndm were confirmed by a second sample. aspergillus terreus isolates were identified ...201323448599
oxidative state in idiophase links reactive oxygen species (ros) and lovastatin biosynthesis: differences and similarities in submerged- and solid-state fermentations.the present work was focused on finding a relationship between reactive oxygen species (ros) and lovastatin biosynthesis (secondary metabolism) in aspergillus terreus. in addition, an effort was made to find differences in accumulation and control of ros in submerged (smf) and solid-state fermentation (ssf), which could help explain higher metabolite production in the latter. sod1 expression, ros content, and redox balance kinetics were measured during smf and ssf. results showed that a. terreus ...201223452946
expression of fusion proteins of aspergillus terreus reveals a novel allene oxide synthase.aspergilli oxidize c18 unsaturated fatty acids by dioxygenase-cytochrome p450 fusion proteins to signal molecules involved in reproduction and host-pathogen interactions. aspergillus terreus expresses linoleate 9r-dioxygenase (9r-dox) and allene oxide synthase (aos) activities in membrane fractions. the genome contains five genes (ateg), which may code for a 9r-dox-aos fusion protein. the genes were cloned and expressed, but none of them oxidized 18:2n-6 to 9r-hydroperoxy-10(e),12(z)-octadecadie ...201323479731
aspergillus terreus endogenous endophthalmitis in a nonimmunocompromised patient with a history of bronchiectasis.to present the first case of aspergillus terreus endophthalmitis in a patient without previous ocular surgery or immunocompromised status with a review of literature.201323480607
lovastatin-enriched rice straw enhances biomass quality and suppresses ruminal methanogenesis.the primary objective of this study was to test the hypothesis that solid state fermentation (ssf) of agro-biomass (using rice straw as model); besides, breaking down its lignocellulose content to improve its nutritive values also produces lovastatin which could be used to suppress methanogenesis in the rumen ecosystem. fermented rice straw (frs) containing lovastatin after fermentation with aspergillus terreus was used as substrate for growth study of rumen microorganisms using in vitro gas pro ...201323484116
aspergillus terreus-related ureteral obstruction in a diabetic patient.an aspergillus fungal ball is a rare cause of ureteral obstruction attributed to indwelling catheters, stents, antibiotics, anastomotic leaks, obstruction, and immunosuppressive therapy and other immunocompromised states. we describe a case of unilateral ureteral obstruction caused by aspergillus terreus following ureteroscopic lithotripsy and ureteral stenting in a 45-year-old diabetic man. the patient was successfully treated with endoscopic removal of the fungal mass and oral voriconazole. we ...201323485541
a new sesquiterpene from the mangrove endophytic fungus aspergillus terreus (no. gx7-3b).a new compound 1 (named botryosphaerin f), along with other three known compounds 2 (13,14,15,16-tetranorlabd-7-ene-19,6b:12,17-diolide), 3 (botryosphaerin b) and 4 (ll-z1271β), has been isolated from the mangrove fungus aspergillus terreus (no. gx7-3b). the structure of the new compound was established by analysis of spectroscopic data. the hypothetical biogenic relationship of four sesquiterpene analogues was also described in this paper. furthermore, in the cytotoxicity assays, compound 1 sho ...201323521163
biological interactions between soil saprotrophic fungi and ascaris suum eggs.the in vitro effect of saprotrophic soil fungi on the embryonic development of ascaris suum was evaluated. the fungi tested were aspergillus fumigatus, aspergillus terreus, penicillium citrinum, penicillium expansum, fusarium oxysporum and trichothecium roseum, isolated from children's recreation areas in the city of lodz (poland). each species was co-cultured with a. suum egg suspension (6 × 10(3)eggs/ml) at 25 ± 2°c for 60 days. each day, 100 eggs were randomly collected and their developmenta ...201323534981
active site model of (r)-selective ω-transaminase and its application to the production of d-amino acids.ω-transaminase (ω-ta) is one of the important biocatalytic toolkits owing to its unique enzyme property which enables the transfer of an amino group between primary amines and carbonyl compounds. in addition to preparation of chiral amines, ω-ta reactions have been exploited for the asymmetric synthesis of l-amino acids using (s)-selective ω-tas. however, despite the availability of (r)-selective ω-tas, catalytic utility of the ω-tas has not been explored for the production of d-amino acids. her ...201423576035
biosynthetic pathway for the epipolythiodioxopiperazine acetylaranotin in aspergillus terreus revealed by genome-based deletion analysis.epipolythiodioxopiperazines (etps) are a class of fungal secondary metabolites derived from diketopiperazines. acetylaranotin belongs to one structural subgroup of etps characterized by the presence of a seven-membered 4,5-dihydrooxepine ring. defining the genes involved in acetylaranotin biosynthesis should provide a means to increase the production of these compounds and facilitate the engineering of second-generation molecules. the filamentous fungus aspergillus terreus produces acetylaranoti ...201323586797
chromatographic quantitation of territrems a, b, and c, tremorgenic mycotoxins from aspergillus terreus.this paper describes assay procedures for territrems a, b, and c by thin layer chromatography (tlc)-fluorodensitometry and reverse phase high performance liquid chromatography (hplc).198723604807
aspergillus terreus and its toxic metabolites as a food contaminant in some egyptian bakery products and grains.a. terreus isolates isolated from some bakery products, corn and rice were found to be able to produce territrems. 90% of thea. terreus isolated from bakery products were able to produce territrem a, with a mean of 0.09 ppm, while 80% ofa. terreus isolates produce territrem b with a mean of 0.24 ppm. on the other hand 31.8% of the isolates ofa. terreus from corn were able to produce territrem a with a mean of 0.44 ppm. concerninga. terreus isolates from rice, 66.7% were found to produce territre ...199823605064
bioconversion of aflatoxin g1 to aflatoxin b 3 by selected fungi.aflatoxin g1 (afg1) was transformed into aflatoxin b3 (afb3) by the fungirhodotorula sp,sporobolomyces sp,rhizopus oryzae nrrl395,pythium ultimum, aspergillus terreus, a clavatus and penicillium frequentans grown in a medium containing afg1, difco potato dextrose broth, yeast extract, and peptone both in liquid shaken cultures and in solid static cultures at 25°c in the dark. a maximum rate of transformation of 10 % was obtained after 2 to 3 weeks of incubation. the transformation was correlated ...199023605445
purification and biochemical characterization of feruloyl esterases from aspergillus terreus mtcc 11096.aspergillus terreus mtcc 11096 isolated from the soils of agricultural fields cultivating sweet sorghum was previously identified to produce feruloyl esterases (faes). the enzymes responsible for feruloyl esterase activity were purified to homogeneity and named as atfae-1, atfae-2, and atfae-3. the enzymes were monomeric having molecular masses of 74, 23 and 36 kda, respectively. active protein bands were identified by a developed ph-dependent zymogram on native page. the three enzymes exhibited ...201323606660
an efficient system for heterologous expression of secondary metabolite genes in aspergillus nidulans.fungal secondary metabolites (sms) are an important source of medically valuable compounds. genome projects have revealed that fungi have many sm biosynthetic gene clusters that are not normally expressed. to access these potentially valuable, cryptic clusters, we have developed a heterologous expression system in aspergillus nidulans . we have developed an efficient system for amplifying genes from a target fungus, placing them under control of a regulatable promoter, transferring them into a. ...201323621425
genome-scale reconstruction and in silico analysis of aspergillus terreus metabolism.aspergillus terreus is widely used for industrial production of important chemical compounds such as itaconate and lovastatin. to improve understanding of its physiology, we reconstructed a genome-scale metabolic model, ijl1454, consisting of 1454 genes, 1451 reactions and 1155 metabolites, based on genome annotation and literature mining. the model accurately predicted the growth phenotype of a. terreus on different carbon and nitrogen sources, and after deletion of essential genes. in ijl1454, ...201323624532
aspergillus arachnoiditis post intrathecal baclofen pump insertion.this report describes an unusual fungal infection of an intrathecal baclofen pump which, to our knowledge, has not been reported previously. we describe a 39-year-old man with severe lower limb spasticity due to secondary progressive multiple sclerosis that was managed with insertion of an intrathecal baclofen pump. he subsequently presented with distinct neurological decline secondary to an intrathecal baclofen pump infection with aspergillus terreus.201323685108
differential antibacterial properties of the mura inhibitors terreic acid and fosfomycin.terreic acid is a metabolite with antibiotic properties produced by the fungus aspergillus terreus, but its cellular target remains unknown. we recently reported that terreic acid inactivates the bacterial cell wall biosynthetic enzyme mura in vitro by covalent reaction with residue cys115 in a similar manner as the mura-specific antibiotic fosfomycin. to address if terreic acid also targets mura in vivo, we conducted antibacterial studies using selected e. coli strains in parallel with fosfomyc ...201323686727
lovastatin in aspergillus terreus: fermented rice straw extracts interferes with methane production and gene expression in methanobrevibacter smithii.lovastatin, a natural byproduct of some fungi, is able to inhibit hmg-coa (3-hydroxy-3 methyl glutaryl coa) reductase. this is a key enzyme involved in isoprenoid synthesis and essential for cell membrane formation in methanogenic archaea. in this paper, experiments were designed to test the hypothesis that lovastatin secreted by aspergillus terreus in fermented rice straw extracts (frse) can inhibit growth and ch4 production in methanobrevibacter smithii (a test methanogen). by hplc analysis, 7 ...201323710454
virulence and thrombocyte affectation of two aspergillus terreus isolates differing in amphotericin b susceptibility.aspergillus terreus-induced invasive infections exhibit high lethality, partly due to the intrinsic resistance for amphotericin b (amb). we compared the virulence and pathogenesis of an amb-resistant isolate of a. terreus (atr) with that of a rare variant showing enhanced sensitivity for amb (ats). the modifications that result in enhanced amb sensitivity of isolates are not associated with reduced virulence in vivo; instead, the ats-infected mice died even faster than the atr-infected animals. ...201323722593
targeting enzymes to the right compartment: metabolic engineering for itaconic acid production by aspergillus niger.itaconic acid is an unsaturated dicarboxylic acid which has a high potential as a biochemical building block. it can be microbially produced from some aspergillus species, such as aspergillus itaconicus and aspergillus terreus. however, the achieved titers are significantly lower as compared to the citric acid production by a. niger. heterologous expression of cis-aconitate decarboxylase in a. niger leads to the accumulation of small amounts of itaconic acid. additional expression of aconitase, ...201323727192
rep-pcr and rapd-pcr fingerprinting of aspergillus terreus.we compared two pcr methods for molecular typing the medically important filamentous fungus aspergillus terreus. in a set of 46 strains investigated we found 19 and 12 different fingerprinting types obtained by random amplified polymorphic dna pcr (rapd) and semi-automated repetitive element pcr (rep-pcr), respectively.201323758105
asperterrestide a, a cytotoxic cyclic tetrapeptide from the marine-derived fungus aspergillus terreus scsgaf0162.a new cytotoxic and antiviral cyclic tetrapeptide, asperterrestide a (1), a new alkaloid, terremide c (2), and a new aromatic butenolide, aspernolide e (3), together with 10 known compounds were isolated from the fermentation broth of the marine-derived fungus aspergillus terreus scsgaf0162. their structures were elucidated by spectroscopic analysis, and the absolute configuration of 1 was determined by the mosher ester technique and analysis of the acid hydrolysates using a chiral-phase hplc co ...201323806112
effects of sugar and amino acid supplementation on aureobasidium pullulans nrrl 58536 antifungal activity against four aspergillus species.cultured cell extracts from ten tropical strains of aureobasidium pullulans were screened for antifungal activity against four pathogenic aspergillus species (aspergillus flavus, aspergillus niger, aspergillus fumigatus, and aspergillus terreus) using the well diffusion and conidial germination inhibition assays. the crude cell extract from a. pullulans nrrl 58536 resulted in the greatest fungicidal activity against all four aspergillus species and so was selected for further investigation into ...201323828601
application of an efficient gene targeting system linking secondary metabolites to their biosynthetic genes in aspergillus terreus.nonribosomal peptides (nrps) are natural products biosynthesized by nrp synthetases. a kusa-, pyrg- mutant strain of aspergillus terreus nih 2624 was developed that greatly facilitated the gene targeting efficiency in this organism. application of this tool allowed us to link four major types of nrp-related secondary metabolites to their responsible genes in a. terreus. in addition, an nrp affecting melanin synthesis was also identified in this species.201323841722
purification and characterization of a hydrolysis-resistant lipase from aspergillus terreus.lipase from aspergillus terreus was purified to homogeneity using ammonium sulfate precipitation and chromatographies with q-sepharose and sephacryl s-200. it showed a single band on sds-page and ief-page with a relative molecular mass of 37.2 kda and pi of 3.2. its glycoprotein nature was confirmed with the percentage of saccharides of 5.02% and 3.88% determined by the phenol/sulfuric acid and anthrone/ sulfuric acid methods, respectively. the lipase hydrolyzed both plant oils and animal oils, ...201423855368
a case of dual infection in a paediatric trauma victim of primary cutaneous aspergillosis caused by aspergillus flavus and aspergillus terreus.aspergillus spp. are widely distributed throughout the environment. they are opportunistic pathogens causing infection at various sites in the body such as lungs, sinuses, eyes, skin, central nervous system etc., primary cutaneous aspergillosis is an uncommon disease entity. primary infections usually occur at sites having disruption of the skin and usually occur in burn patients, trauma and surgical patients. a 4-year-old girl who was run over by a truck and suffered extensive de-gloving injury ...201423867682
activity of antifungal combinations against aspergillus species evaluated by isothermal microcalorimetry.we evaluated the activity of antifungals alone or in combination against aspergillus fumigatus and aspergillus terreus by real-time measurement of fungal growth-related heat production. amphotericin b, voriconazole, caspofungin, and anidulafungin were tested alone or in combination. heat production was measured in sabouraud dextrose broth containing 10(5)aspergillus conidia/ml for 48 h at 37 °c. antifungal activity was evaluated by measuring the heat detection time relative to the growth control ...201323871413
secondary metabolites of a mangrove endophytic fungus aspergillus terreus (no. gx7-3b) from the south china sea.the mangrove endophytic fungus aspergillus terreus (no. gx7-3b) was cultivated in potato dextrose liquid medium, and one rare thiophene compound (1), together with anhydrojavanicin (2), 8-o-methylbostrycoidin (3), 8-o-methyljavanicin (4), botryosphaerone d (5), 6-ethyl-5-hydroxy-3,7-dimethoxynaphthoquinone (6), 3β,5α-dihydroxy-(22e,24r)-ergosta-7,22-dien-6-one (7), 3β,5α,14α-trihydroxy-(22e,24r)-ergosta-7, 22-dien-6-one (8), nga0187 (9) and beauvericin (10), were isolated. their structures were ...201323877026
two β-xylanases from aspergillus terreus: characterization and influence of phenolic compounds on xylanase activity.sugarcane bagasse was used as an inexpensive alternative carbon source for production of β-xylanases from aspergillus terreus. the induction profile showed that the xylanase activity was detected from the 6th day of cultivation period. two low molecular weight enzymes, named xyl t1 and xyl t2 were purified to apparent homogeneity by ultrafiltration, gel filtration and ion exchange chromatographies and presented molecular masses of 24.3and 23.60 kda, as determined by sds-page, respectively. xyl t ...201323892064
mechanistic insights from the binding of substrate and carbocation intermediate analogues to aristolochene synthase.aristolochene synthase, a metal-dependent sesquiterpene cyclase from aspergillus terreus, catalyzes the ionization-dependent cyclization of farnesyl diphosphate (fpp) to form the bicyclic eremophilane (+)-aristolochene with perfect structural and stereochemical precision. here, we report the x-ray crystal structure of aristolochene synthase complexed with three mg(2+) ions and the unreactive substrate analogue farnesyl-s-thiolodiphosphate (fspp), showing that the substrate diphosphate group is a ...201323905850
photochemical and antimicrobial properties of silver nanoparticle-encapsulated chitosan functionalized with photoactive groups.chitosan was functionalized with 4-((e)-2-(3-hydroxynaphthalen-2-yl)diazen-1-yl)benzoic acid by the coupling of the hydroxyl functional groups of chitosan with carboxylic acid group of the dye by dcc coupling method. the silver nanoparticles were prepared by sol-gel method of nanoparticle synthesis. silver nanoparticle-encapsulated functionalized chitosan was prepared by the phase transfer method. the products were characterized by ftir, uv-vis, fluorescence and nmr spectroscopic methods and by ...201323910360
spiro fused diterpene-indole alkaloids from a creek-bottom-derived aspergillus terreus.four metabolites, teraspiridoles a-d (2-5), formed from the merger of a diterpene and modified indole scaffold were obtained from an aspergillus terreus isolate. the structures and absolute configurations of these natural products were established using nmr, mass spectrometry, marfey's method, vcd, and ecd data. teraspiridole b (3) exhibited weak inhibition of planaria regeneration/survival.201323924243
different colonization patterns of aspergillus terreus in patients with cystic fibrosis.aspergillus terreus is a common soil saprophyte. after aspergillus fumigatus and scedosporium apiospermum it ranks third amongst the filamentous fungi colonizing the airways of patients with cystic fibrosis. in this context, the clinical presentation of a. terreus infection mainly corresponds to allergic broncho-pulmonary aspergillosis. in the work presented here, we studied colonization patterns of a. terreus in cf patients by genotyping using nine short tandem repeat markers. a total of 115 cl ...201423927682
application of scale-up criterion of constant oxygen mass transfer coefficient (kla) for production of itaconic acid in a 50 l pilot-scale fermentor by fungal cells of aspergillus terreus.the scale-up criterion of constant oxygen mass transfer coefficient (kla) was applied for the production of itaconic acid (ia) in a 50 l pilot-scale fermentor by the fungal cells of aspergillus terreus. various operating conditions were examined to collect as many kla data as possible by adjusting the stirring speed and aeration rate in both 5 l and 50 l fermentor systems. in the fermentations performed with the 5 l fermentor, the highest ia production was obtained under the operating conditions ...201323928842
determination of isavuconazole susceptibility of aspergillus and candida species by the eucast method.isavuconazole is a novel expanded-spectrum triazole, which has recently been approved by the fda as an orphan drug to treat invasive aspergillosis and is currently being studied in phase iii clinical trials for invasive candidiasis. the susceptibility of relatively few clinical isolates has been reported. in this study, the isavuconazole susceptibilities of 1,237 aspergillus and 2,010 candida geographically diverse clinical isolates were determined by eucast methodology at four european mycology ...201323959309
primary cutaneous aspergillosis due to aspergillus tamarii in an immunocompetent host.primary cutaneous aspergillosis is a rare disease usually caused by aspergillus fumigatus, aspergillus flavus, aspergillus terreus and aspergillus ustus. it is usually seen in immunocompromised hosts, though some cases are also reported in immunocompetent hosts. we present a case of an immunocompetent farmer who presented with generalised nodules and plaques, mimicking erythema nodosum leprosum but turned out to be cutaneous aspergillosis caused by aspergillus tamarii. the characteristic ascospo ...201323970496
antimicrobial agents produced by marine aspergillus terreus var. africanus against some virulent fish pathogens.screening of fungal isolates collected from different locations of alexandria coast, egypt, was carried out to obtain new biologically active metabolites against some virulent fish pathogens (edwardsiella tarda, aeromonas hydrophila, vibrio ordalli and vibrio angularuim). among 26 fungal isolates, aspergillus terreus var. africanus was identified as the most potent isolate. production of the bioactive material was optimized using response surface methodology including fermentation media, incubat ...201223997326
in vitro antimicrobial potential of the lichen parmotrema sp. extracts against various pathogens.the ongoing increasing antibiotic resistance is one of the biggest challenges faced by global public health. the perennial need for new antimicrobials against a background of increasing antibiotic resistance in pathogenic and opportunistic microorganisms obliges the scientific community to constantly develop new drugs and antimicrobial agents. lichens are known prolific sources of natural antimicrobial drugs and biologically active natural products. this study was aimed to explore in vitro antim ...201323997920
heterologous reconstitution of the intact geodin gene cluster in aspergillus nidulans through a simple and versatile pcr based approach.fungal natural products are a rich resource for bioactive molecules. to fully exploit this potential it is necessary to link genes to metabolites. genetic information for numerous putative biosynthetic pathways has become available in recent years through genome sequencing. however, the lack of solid methodology for genetic manipulation of most species severely hampers pathway characterization. here we present a simple pcr based approach for heterologous reconstitution of intact gene clusters. s ...201324009710
chemoenzymatic synthesis of α-l-rhamnosides using recombinant α-l-rhamnosidase from aspergillus terreus.this study describes an efficient, large scale fermentation of a recombinant α-l-rhamnosidase originating from aspergillus terreus. high-cell-density pichia pastoris fermentation resulted in yields up to 627 u/l/h. the recombinant enzyme was used for the reverse rhamnosylation of various small organic compounds. a full factorial experimental design setup was applied to identify the importance of temperature, substrate concentrations, solvent type and concentration as well as the acidity of the r ...201324012095
response surface methodology for optimization of production of lovastatin by solid state fermentation.lovastatin, an inhibitor of hmg-coa reductase, was produced by solid state fermentation (ssf) using a strain of aspergillus terreus uv 1718. different solid substrates and various combinations thereof were evaluated for lovastatin production. wheat bran supported the maximum production (1458 ± 46 µg g(-1) dfm) of lovastatin. response surface methodology (rsm) was applied to optimize the medium constituents. a 2(4) full-factorial central composite design (ccd) was chosen to explain the combined e ...201024031477
antifungal activity of different neem leaf extracts and the nimonol against some important human pathogens.this study was conducted to evaluate the effect of aqueous, ethanolic and ethyl acetate extracts from neem leaves on growth of some human pathogens (aspergillus flavus, aspergillus fumigatus, aspergillus niger, aspergillus terreus, candida albicans and microsporum gypseum) in vitro. different concentrations (5, 10, 15 and 20%) prepared from these extracts inhibited the growth of the test pathogens and the effect gradually increased with concentration. the 20% ethyl acetate extract gave the stron ...201124031718
modification of c and n sources for enhanced production of cyclosporin 'a' by aspergillus terreus.most of the studies regarding cyclosporin 'a' production through fungi concentrate around tolypocladium inflatum. this is mainly due to lower reported production of this drug in other fungi. the present study was therefore conducted to explore indigenous isolates of aspergillus terreus for synthesis of this drug and defining a production medium for obtaining high yield of cyclosporin 'a'. for this purpose carbon and nitrogen sources were optimized for the selected best strain of a. terreus. over ...201124031766
physiological studies on carboxymethyl cellulase formation by aspergillus terreus dsm 826.physiological studies were conducted to determine the optimum cultural conditions for maximal carboxymethyl cellulase (cmcase) formation by aspergillus terreus dsm 826. shaking condition at 150 rpm is favorable for the production of cmcase from rice straw and sugar cane bagasse. the highest enzyme yield was obtained at the third day of incubation at 30 °c for both cases; however cmcase formation occurred at a broad range of ph values, with maximal formation of a. terreus dsm 826 cmcase at ph 4.5 ...201224031798
the hydrolysis of agro-industrial residues by holocellulose-degrading enzymes.holocellulose structures from agro-industrial residues rely on main and side chain attacking enzymes with different specificities for complete hydrolysis. combinations of crude enzymatic extracts from different fungal species, including aspergillus terreus, aspergillus oryzae, aspergillus niger and trichoderma longibrachiatum, were applied to sugar cane bagasse, banana stem and dirty cotton residue to investigate the hydrolysis of holocellulose structures. a. terreus and a. oryzae were the best ...201224031857
overexpression of a modified 6-phosphofructo-1-kinase results in an increased itaconic acid productivity in aspergillus niger.a modified 6-phosphofructo-1-kinase was expressed in a citrate producing aspergillus niger strain in combination with cis-aconitate decarboxylase from aspergillus terreus to study the effect on the production of itaconic acid. the modified pfka gene was also expressed in combination with the itaconic acid biosynthetic cluster from a. terreus, which consists of cis-aconitate decarboxylase cada, a putative mitochondrial transporter mtta and a putative plasmamembrane transporter mfsa. the combined ...201324034235
raw starch degrading amylase production by various fungal cultures grown on cassava waste.the solid waste of sago industry using cassava was fermented by aspergillus niger, aspergillus terreus and rhizopus stolonifer in solid state fermentation. cassava waste contained 52 per cent starch and 2.9 per cent protein by dry weight. the amylase activity was maintained at a high level and the highest amylase activity was observed on the 8(th) day in r. stolonifer mediated fermentation. r. stolonifer was more efficient than aspergillus niger and aspergillus terreus in bioconverting cassava w ...200624039485
bioconversion of straw into improved fodder: mycoprotein production and cellulolytic acivity of rice straw decomposing fungi.sixty two out of the sixty four species of fungal isolates tested could produce both exo-β1,4-gluconase (c1) and endo-β1,4-gluconase (cx) on pure cellulose and rice straw as carbon source in czapek's medium. fifty-eight and fifteen species were able to grow at 25℃ and at 45℃, respectively. eleven species could grow at both 25℃ and 45℃ while, four species appeared only at 45℃. the most cellulolytic species at 25℃ was trichoderma koningii producing 1.164 c1 (mg glucose/1 ml culture filtrate/1 hr) ...200524049480
Refresh
firstprev
12345678910...
nextlast
Displaying items 701 - 800 of 1090