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https://www.readbyqxmd.com/read/28639705/cloning-and-characterization-of-iron-superoxide-dismutase-in-antarctic-yeast-strain-rhodotorula-mucilaginosa-an5
#1
Guangfeng Kan, Hua Wen, Xiaofei Wang, Ting Zhou, Cuijuan Shi
A novel superoxide dismutase gene from Antarctic yeast Rhodotorula mucilaginosa AN5 was cloned, sequenced, and then expressed in Escherichia coli. The R. mucilaginosa AN5 SOD (RmFeSOD) gene was 639 bp open reading frame in length, which encoded a protein of 212 amino acids with a deduced molecular mass of 23.5 kDa and a pI of 7.89. RmFeSOD was identified as iron SOD type with a natural status of homodimer. The recombinant RmFeSOD showed good pH stability in the pH 1.0-9.0 after 1 h incubation. Meanwhile, it was found to behave relatively high thermostability, and maintained more than 80% activity at 50 °C for 1 h...
June 22, 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/28615057/erratum-to-engineering-an-efficient-and-tight-d-amino-acid-inducible-gene-expression-system-in-rhodosporidium-rhodotorula-species
#2
Yanbin Liu, Chong Mei John Koh, Si Te Ngoh, Lianghui Ji
No abstract text is available yet for this article.
June 14, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28597157/optimization-of-cultivation-conditions-for-biotechnological-production-of-lipid-by-rhodotorula-kratochvilovae-syn-rhodosporidium-kratochvilovae-sy89-for-biodiesel-preparation
#3
Tamene Milkessa Jiru, Marizeth Groenewald, Carolina Pohl, Laurinda Steyn, Nicholas Kiggundu, Dawit Abate
Rhodotorula kratochvilovae (syn, Rhodosporidium kratochvilovae) SY89, an oleaginous yeast, isolated from Ethiopian soil, was grown under nitrogen-limited media. The capacity this with respect to biomass production, lipid yield and lipid content was evaluated. The influence of inoculum size, carbon sources, variations in glucose concentration, nitrogen sources, C/N ratio, pH, temperature, agitation, and aeration rate and incubation period were investigated. Inoculum size of 10% v/v, glucose as a carbon source at 50 g/L glucose, 0...
June 2017: 3 Biotech
https://www.readbyqxmd.com/read/28560168/genome-sequence-of-the-oleaginous-yeast-rhodotorula-toruloides-strain-cgmcc-2-1609
#4
Christine Sambles, Sabine Middelhaufe, Darren Soanes, Dagmara Kolak, Thomas Lux, Karen Moore, Petra Matoušková, David Parker, Rob Lee, John Love, Stephen J Aves
Most eukaryotic oleaginous species are yeasts and among them the basidiomycete red yeast, Rhodotorula (Rhodosporidium) toruloides (Pucciniomycotina) is known to produce high quantities of lipids when grown in nitrogen-limiting media, and has potential for biodiesel production. The genome of the CGMCC 2.1609 strain of this oleaginous red yeast was sequenced using a hybrid of Roche 454 and Illumina technology generating 13 × coverage. The de novo assembly was carried out using MIRA and scaffolded using MAQ and BAMBUS...
September 2017: Genomics Data
https://www.readbyqxmd.com/read/28558761/production-characterization-and-antifungal-activity-of-a-biosurfactant-produced-by-rhodotorula-babjevae-ys3
#5
Suparna Sen, Siddhartha Narayan Borah, Arijit Bora, Suresh Deka
BACKGROUND: Sophorolipids are one of the most promising glycolipid biosurfactants and have been successfully employed in bioremediation and various other industrial sectors. They have also been described to exhibit antimicrobial activity against different bacterial species. Nevertheless, previous literature pertaining to the antifungal activity of sophorolipids are limited indicating the need for further research to explore novel strains with wide antimicrobial activity. A novel yeast strain, Rhodotorula babjevae YS3, was recently isolated from an agricultural field in Assam, Northeast India...
May 30, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28540503/hydroxy-al-and-cell-surface-negativity-are-responsible-for-the-enhanced-sensitivity-of-rhodotorula-taiwanensis-to-aluminum-by-increased-medium-ph
#6
Xue Qiang Zhao, Xue Min Bao, Chao Wang, Zuo Yi Xiao, Zhen Min Hu, Chun Li Zheng, Ren Fang Shen
Aluminum (Al) is ubiquitous and toxic to microbes. High Al(3+) concentration and low pH are two key factors responsible for Al toxicity, but our present results contradict this idea. Here, an Al-tolerant yeast strain Rhodotorula taiwanensis RS1 was incubated in glucose media containing Al with a continuous pH gradient from pH 3.1-4.2. The cells became more sensitive to Al and accumulated more Al when pH increased. Calculations using an electrostatic model Speciation Gouy Chapman Stern indicated that, the increased Al sensitivity of cells was associated with AlOH(2+) and Al(OH) 2(+) rather than Al(3+)...
May 24, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28528384/effects-of-salts-contained-in-lignocellulose-derived-sugar-streams-on-microbial-lipid-production
#7
Zhu Chen, Caixia Wan
This study aimed at developing low-cost, robust non-sterile fermentation processes for microbial lipid production from lignocellulose-derived sugars. Three representative oleaginous yeasts, Lipomyces tetrasporus (NRRL Y-11562), Rhodotorula toruloides (NRRL Y-1091), and Yarrowia lipolytica (NRRL YB-437), were tested for lipid production via non-sterile fermentation. Under optimal non-sterile conditions, all the tested strains had good performance on salt tolerance and lipid production. L. tetrasporus (NRRL Y-11562) gave the highest lipid titer of 12...
May 20, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/28506251/diversity-in-vitro-virulence-traits-and-antifungal-susceptibility-pattern-of-gastrointestinal-yeast-flora-of-healthy-poultry-gallus-gallus-domesticus
#8
Supram Hosuru Subramanya, Nawal Kishor Sharan, Bharat Prasad Baral, Deependra Hamal, Niranjan Nayak, Peralam Yegneswaran Prakash, Brijesh Sathian, Indira Bairy, Shishir Gokhale
BACKGROUND: Poultry farming and consumption of poultry (Gallus gallus domesticus) meat and eggs are common gastronomical practices worldwide. Till now, a detailed understanding about the gut colonisation of Gallus gallus domesticus by yeasts and their virulence properties and drug resistance patterns in available literature remain sparse. This study was undertaken to explore this prevalent issue. RESULTS: A total of 103 specimens of fresh droppings of broiler chickens (commercial G domesticus) and domesticated chickens (domesticated G domesticus) were collected from the breeding sites...
May 15, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28480087/rhodotorula-endogenous-endophthalmitis-a-novel-harbinger-of-the-injection-drug-epidemic-in-the-united-states
#9
Preston M Luong, Basilio Kalpakian, Lawrence J Jaeger, Timothy Lahey, Christopher B Chapman, Michael E Zegans
Endogenous endophthalmitis is a rare but feared infectious ocular complication of injection drug use (IDU). The recent opioid epidemic in the United States threatens to increase the incidence of this disease. We report the first case of endogenous endophthalmitis in the United States caused by the emerging fungal pathogen Rhodotorula in an injection drug user which led to no light perception vision (NLP). Worldwide experience with Rhodotorula endogenous endophthalmitis is limited, but existing cases suggest infection by this particular fungal genus has a grim prognosis...
2017: Case Reports in Infectious Diseases
https://www.readbyqxmd.com/read/28472673/phenylalanine-ammonia-lyase-from-arabidopsis-thaliana-atpal2-a-potent-mio-enzyme-for-the-synthesis-of-non-canonical-aromatic-alpha-amino-acids-part-ii-application-in-different-reactor-concepts-for-the-production-of-s-2-chloro-phenylalanine
#10
Alana Dreßen, Thomas Hilberath, Ursula Mackfeld, Jens Rudat, Martina Pohl
Phenylalanine ammonia lyase (PAL) from Arabidopsis thaliana (AtPAL2) is in general a very good catalyst for the amination of fluoro- and chloro-cinnamic acid derivatives yielding halogenated (S)-phenylalanine derivatives with ≥85% conversion and excellent ee values >99%. We have studied the application of this enzyme as whole cell biocatalyst and immobilized on the cellulose carrier Avicel(®) for the production of the hypertension drug precursor (S)-2-chloro-phenylalanine using batch, fed-batch, as well as continuous membrane reactor and plug-flow reactor...
May 1, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28371463/microbial-cell-disruption-for-improving-lipid-recovery-using-pressurized-co2-role-of-co2-solubility-in-cell-suspension-sugar-broth-and-spent-media
#11
Md Shamim Howlader, William Todd French, Sara A Shields-Menard, Marta Amirsadeghi, Magan Green, Neeraj Rai
The study of in situ gas explosion to lyse the triglyceride-rich cells involves the solubilization of gas (e.g., carbon dioxide, CO2 ) in lipid-rich cells under pressure followed by a rapid decompression, which allows the gas inside the cell to rapidly expand and rupture the cell from inside out. The aim of this study was to perform the cell disruption using pressurized CO2 as well as to determine the solubility of CO2 in Rhodotorula glutinis cell suspension, sugar broth media, and spent media. Cell disruption of R...
April 3, 2017: Biotechnology Progress
https://www.readbyqxmd.com/read/28344645/mimicking-lichens-incorporation-of-yeast-strains-together-with-sucrose-secreting-cyanobacteria-improves-survival-growth-ros-removal-and-lipid-production-in-a-stable-mutualistic-co-culture-production-platform
#12
Tingting Li, Chien-Ting Li, Kirk Butler, Stephanie G Hays, Michael T Guarnieri, George A Oyler, Michael J Betenbaugh
BACKGROUND: The feasibility of heterotrophic-phototrophic symbioses was tested via pairing of yeast strains Cryptococcus curvatus, Rhodotorula glutinis, or Saccharomyces cerevisiae with a sucrose-secreting cyanobacterium Synechococcus elongatus. RESULTS: The phototroph S. elongatus showed no growth in standard BG-11 medium with yeast extract, but grew well in BG-11 medium alone or supplemented with yeast nitrogen base without amino acids (YNB w/o aa). Among three yeast species, C...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28341907/utilization-of-inulin-containing-waste-in-industrial-fermentations-to-produce-biofuels-and-bio-based-chemicals
#13
REVIEW
Stephen R Hughes, Nasib Qureshi, Juan Carlos López-Núñez, Marjorie A Jones, Joshua M Jarodsky, Luz Ángela Galindo-Leva, Mitchell R Lindquist
Inulins are polysaccharides that belong to an important class of carbohydrates known as fructans and are used by many plants as a means of storing energy. Inulins contain 20 to several thousand fructose units joined by β-2,1 glycosidic bonds, typically with a terminal glucose unit. Plants with high concentrations of inulin include: agave, asparagus, coffee, chicory, dahlia, dandelion, garlic, globe artichoke, Jerusalem artichoke, jicama, onion, wild yam, and yacón. To utilize inulin as its carbon and energy source directly, a microorganism requires an extracellular inulinase to hydrolyze the glycosidic bonds to release fermentable monosaccharides...
April 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28339535/fungemia-due-to-rare-opportunistic-yeasts-data-from-a-population-based-surveillance-in-spain
#14
Mario Fernández-Ruiz, Jesús Guinea, Mireia Puig-Asensio, Óscar Zaragoza, Benito Almirante, Manuel Cuenca-Estrella, José María Aguado
Fungemia due to rare yeasts constitutes an emerging but poorly investigated condition. Data on risk factors, clinical features, therapy, and outcome of episodes of fungemia due to rare (non-Candida, non-Cryptococcus) yeasts were analyzed in a population-based surveillance program conducted in 29 Spanish hospitals between May 2010 and April 2011. Species identification (DNA sequencing) and antifungal susceptibility testing (EUCAST and CLSI methods) were centrally performed. Fourteen out of 767 episodes of fungemia (1...
August 5, 2016: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28317762/evaluation-of-aroma-enhancement-for-ecolly-dry-white-wines-by-mixed-inoculation-of-selected-rhodotorula-mucilaginosa-and-saccharomyces-cerevisiae
#15
Xing-Chen Wang, Ai-Hua Li, Marta Dizy, Niamat Ullah, Wei-Xuan Sun, Yong-Sheng Tao
To improve the aroma profile of Ecolly dry white wine, the simultaneous and sequential inoculations of selected Rhodotorula mucilaginosa and Saccharomyces cerevisiae were performed in wine making of this work. The two yeasts were mixed in various ratios for making the mixed inoculum. The amount of volatiles and aroma characteristics were determined the following year. Mixed fermentation improved both the varietal and fermentative aroma compound composition, especially that of (Z)-3-hexene-1-ol, nerol oxide, certain acetates and ethyls group compounds...
August 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28289902/discovery-of-synthesis-and-secretion-of-polyol-esters-of-fatty-acids-by-four-basidiomycetous-yeast-species-in-the-order-sporidiobolales
#16
Luis A Garay, Irnayuli R Sitepu, Tomas Cajka, Oliver Fiehn, Erin Cathcart, Russell W Fry, Atit Kanti, Agustinus Joko Nugroho, Sarah Asih Faulina, Sira Stephanandra, J Bruce German, Kyria L Boundy-Mills
Polyol esters of fatty acids (PEFA) are amphiphilic glycolipids produced by yeast that could play a role as natural, environmentally friendly biosurfactants. We recently reported discovery of a new PEFA-secreting yeast species, Rhodotorula babjevae, a basidiomycetous yeast to display this behavior, in addition to a few other Rhodotorula yeasts reported on the 1960s. Additional yeast species within the taxonomic order Sporidiobolales were screened for secreted glycolipid production. PEFA production equal or above 1 g L(-1) were detected in 19 out of 65 strains of yeast screened, belonging to 6 out of 30 yeast species tested...
March 13, 2017: Journal of Industrial Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28275154/a-member-of-the-gut-mycobiota-modulates-host-purine-metabolism-exacerbating-colitis-in-mice
#17
Tyson R Chiaro, Ray Soto, W Zac Stephens, Jason L Kubinak, Charisse Petersen, Lasha Gogokhia, Rickesha Bell, Julio C Delgado, James Cox, Warren Voth, Jessica Brown, David J Stillman, Ryan M O'Connell, Anne E Tebo, June L Round
The commensal microbiota has an important impact on host health, which is only beginning to be elucidated. Despite the presence of fungal, archaeal, and viral members, most studies have focused solely on the bacterial microbiota. Antibodies against the yeast Saccharomyces cerevisiae are found in some patients with Crohn's disease (CD), suggesting that the mycobiota may contribute to disease severity. We report that S. cerevisiae exacerbated intestinal disease in a mouse model of colitis and increased gut barrier permeability...
March 8, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28272809/bioprospection-of-cold-adapted-yeasts-with-biotechnological-potential-from-antarctica
#18
María Martha Martorell, Lucas Adolfo Mauro Ruberto, Pablo Marcelo Fernández, Lucía Inés Castellanos de Figueroa, Walter Patricio Mac Cormack
The aim of this study was to investigate the ability to produce extracellular hydrolytic enzymes at low temperature of yeasts isolated from 25 de Mayo island, Antarctica, and to identify those exhibiting one or more of the evaluated enzymatic activities. A total of 105 yeast isolates were obtained from different samples and 66 were identified. They belonged to 12 basidiomycetous and four ascomycetous genera. Most of the isolates were ascribed to the genera Cryptococcus, Mrakia, Cystobasidium, Rhodotorula, Gueomyces, Phenoliferia, Leucosporidium, and Pichia...
June 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/28253367/hg-tolerance-and-biouptake-of-an-isolated-pigmentation-yeast-rhodotorula-mucilaginosa
#19
Bing Liu, Chaogang Wang, Danxia Liu, Ning He, Xu Deng
A pigmented yeast R1 with strong tolerance to Hg2+ was isolated. Phylogenetic identification based on the analysis of 26S rDNA and ITS revealed R1 is a Rhodotorula mucilaginosa species. R1 was able to grow in the presence of 80 mg/L Hg2+, but the lag phase was much prolonged compared to its growth in the absence of Hg2+. The maximum Hg2+ binding capacity of R1 was 69.9 mg/g, and dead cells could bind 15% more Hg2+ than living cells. Presence of organic substances drastically reduced bioavailability of Hg2+ and subsequently decreased Hg2+ removal ratio from aqueous solution, but this adverse effect could be remarkably alleviated by the simultaneous process of cell propagation and Hg2+ biouptake with actively growing R1...
2017: PloS One
https://www.readbyqxmd.com/read/28242037/influence-of-high-power-ultrasound-on-selected-moulds-yeasts-and-alicyclobacillus-acidoterrestris-in-apple-cranberry-and-blueberry-juice-and-nectar
#20
Anet Režek Jambrak, Marina Šimunek, Silva Evačić, Ksenija Markov, Goran Smoljanić, Jadranka Frece
The purpose of this study was to investigate the effect of non-thermal technology, high power ultrasound (HPU) on inactivation of Aspergillus ochraceus 318, Penicillium expansum 565, Rhodotorula sp. 74, Saccharomyces cerevisiae 5 and Alicyclobacillus acidoterrestris DSM 3922 in clear juices and nectars from apple, blueberry and cranberry juice concentrate. Inoculated juice and nectars were treated by high power ultrasound (20kHz) according to procedure set by central composite design (CCD). Three operational parameters, amplitude (60, 90 and 120μm), temperature (20, 40 and 60°C), and treatment time (3, 6 or 9min) were varied in order to observe the influence of ultrasound and combination of ultrasound and slight heating (thermosonication) on growth and inactivation of selected microorganisms...
February 17, 2017: Ultrasonics
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