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https://www.readbyqxmd.com/read/29466942/identification-of-novel-genes-in-the-carotenogenic-and-oleaginous-yeast-rhodotorula-toruloides-through-genome-wide-insertional-mutagenesis
#1
Yanbin Liu, Chong Mei John Koh, Sihui Amy Yap, Minge Du, Mya Myintzu Hlaing, Lianghui Ji
BACKGROUND: Rhodotorula toruloides is an outstanding producer of lipids and carotenoids. Currently, information on the key metabolic pathways and their molecular basis of regulation remains scarce, severely limiting efforts to engineer it as an industrial host. RESULTS: We have adapted Agrobacterium tumefaciens-mediated transformation (ATMT) as a gene-tagging tool for the identification of novel genes in R. toruloides. Multiple factors affecting transformation efficiency in several species in the Pucciniomycotina subphylum were optimized...
February 21, 2018: BMC Microbiology
https://www.readbyqxmd.com/read/29464844/dietary-live-yeast-and-increased-water-temperature-influence-the-gut-microbiota-of-rainbow-trout
#2
David Huyben, Li Sun, Richard Moccia, Anders Kiessling, Johan Dicksved, Torbjörn Lundh
AIMS: The objective was to determine the effects of dietary substitution of fishmeal with live yeast and increasing water temperature on the diversity and composition of gut microbiota in rainbow trout. METHODS AND RESULTS: Fish were fed either fishmeal or yeast (Saccharomyces cerevisiae) and reared in water temperatures of either 11 °C (cold) or 18 °C (warm) for six weeks. Luminal content and mucosa were collected from the distal gut and the load, diversity and species abundance of yeast and bacteria were analysed using agar plating, MALDI-TOF and rRNA gene amplicon sequencing...
February 21, 2018: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29453061/effect-of-u-vi-aqueous-speciation-on-the-binding-of-uranium-by-the-cell-surface-of-rhodotorula-mucilaginosa-a-natural-yeast-isolate-from-bentonites
#3
Margarita Lopez-Fernandez, Maria Romero-González, Alix Günther, Pier L Solari, Mohamed L Merroun
This study presents the effect of aqueous uranium speciation (U-hydroxides and U-hydroxo-carbonates) on the interaction of this radionuclide with the cells of the yeast Rhodotorula mucigilanosa BII-R8. This strain was isolated from Spanish bentonites considered as reference materials for the engineered barrier components of the future deep geological repository of radioactive waste. X-ray absorption and infrared spectroscopy showed that the aqueous uranium speciation has no effect on the uranium binding process by this yeast strain...
February 9, 2018: Chemosphere
https://www.readbyqxmd.com/read/29442377/a-cold-and-organic-solvent-tolerant-lipase-produced-by-antarctic-strain-rhodotorula-sp-y-23
#4
Abhas K Maharana, Shiv M Singh
Psychrotolerant yeast Rhodotorula sp. Y-23 was isolated from the sediment core sub-samples of Nella Lake, East Antarctica. Isolate was screened for lipase production using plate assay method followed by submerged fermentation. Production optimization revealed the maximum lipase production by using palmolein oil (5% v/v), pH 8.0 and inoculum size of 2.5% v/v at 15 °C. The potential inducers for lipase were 1% w/v of galactose and KNO3, and MnCl2(0.1% w/v). Final productions with optimized conditions gave 5...
February 14, 2018: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/29433238/disinfection-efficacy-over-yeast-biofilms-of-juice-processing-industries
#5
María C Tarifa, Jorge E Lozano, Lorena I Brugnoni
Membrane separation systems represent a hot - spot for biofilm formation in juice industries. Sodium hypochlorite (NaOCl) has been traditionally the disinfectant of choice; however, its effectiveness over well-established biofilms is limited. In this work the study of biofilm formation on ultrafiltration membranes was proposed. The effectiveness of cleaning and disinfection procedures commonly used in juice industry was tested on the removal and killing of cells. The species used (Rhodotorula mucilaginosa, Candida krusei, Candida kefyr and Candida tropicalis) were isolated from ultrafiltration modules of a clarified apple juice industry...
March 2018: Food Research International
https://www.readbyqxmd.com/read/29428422/yeasts-from-skin-colonization-are-able-to-cross-the-acellular-dermal-matrix
#6
Isabele Carrilho Jarros, Érika Okuno, Maiara Ignacio Costa, Flávia Franco Veiga, Patricia de Souza Bonfim-Mendonça, Melyssa Fernanda Norman Negri, Terezinha Inez Estivalet Svidzinski
In recent decades, the prognosis for burn patients has improved considerably with the development of specialized care. The acellular dermal matrix (ADM) is a totally artificial acellular device that functions to control water loss, prevent penetration by bacteria and allow migration of endothelial cells and fibroblasts from patient tissues. However, little is known about its effectiveness against yeasts. The present study evaluated the capacity of colonization and migration of some human commensal yeasts. Three clinical isolates from skin scales, identified as Candida parapsilosis, Candida glabrata and Rhodotorula mucilaginosa, were used...
February 8, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29424627/bioprospecting-microbes-for-single-cell-oil-production-from-starchy-wastes
#7
Shivani Chaturvedi, Arti Kumari, Lata Nain, Sunil K Khare
Production of lipid from oleaginous yeast using starch as carbon source is not a common practice, therefore the purpose of this investigation was to explore the capability of starch assimilating microbes to produce oil, which was determined in terms of biomass weight, productivity & lipid yield. Saccharomyces pastorianus, Rhodotorula mucilaginosa, R. glutinis, and fungal isolate Ganoderma wiiroense were screened for the key parameters. The optimization was also carried out by one factor at a time approach. Considering the specific yield of lipid and cell dry weight yield, R...
February 9, 2018: Preparative Biochemistry & Biotechnology
https://www.readbyqxmd.com/read/29421668/first-report-of-sporadic-cases-of-candida-auris-in-colombia
#8
Claudia M Parra-Giraldo, Sandra L Valderrama, Gloria Cortes-Fraile, Javier R Garzón, Beatriz E Ariza, Florent Morio, Melva Y Linares-Linares, Andrés Ceballos-Garzón, Alejandro de la Hoz, Catalina Hernandez, Carlos Alvarez-Moreno, Patrice Le Pape
BACKGROUND: Candida auris is a recently reported Candida species which is phenotypically similar to Candida haemulonii and related to hospital outbreaks. This organism can be misidentified as C. haemulonii, C. famata, C. catenulata or Rhodotorula glutinis by phenotypic approaches. MALDI-TOF MS and DNA sequence analysis using ITS rDNA barcoding provide an accurate identification. CASE PRESENTATIONS: Three cases of C. auris infection in patients with risk factors for fungal infection (Admitted to the intensive care unit, lymphoma and HIV respectively, all three with previous antibiotic use) and not epidemiologically related...
February 5, 2018: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/29414159/enhanced-single-cell-oil-production-by-mixed-culture-of-chlorella-pyrenoidosa-and-rhodotorula-glutinis-using-cassava-bagasse-hydrolysate-as-carbon-source
#9
Lu Liu, Junhui Chen, Phaik-Eem Lim, Dong Wei
The single cell oil (SCO) production by the mono and mixed culture of microalgae Chlorella pyrenoidosa and red yeast Rhodotorula glutinis was investigated using non-detoxified cassava bagasse hydrolysate (CBH) as carbon source. The results suggested that the two strains were able to tolerate and even degrade some byproducts presented in the CBH, and the mixed culture approach enhanced the degradation of certain byproducts. Biomass (20.37 ± 0.38 g/L) and lipid yield (10.42 ± 1.21 g/L) of the mixed culture achieved in the batch culture were significantly higher than that of the mono-cultures (p < 0...
February 2, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29387377/mycofloral-profile-and-the-radiation-sensitivity-d10-values-of-solar-dried-and-gamma-irradiated-pleurotus-ostreatus-jacq-ex-fr-kummer-fruitbodies-stored-in-two-different-packaging-materials
#10
Nii Korley Kortei, George Tawia Odamtten, Mary Obodai, Michael Wiafe-Kwagyan
The presence of fungi in our foods poses serious health risks as some genera of fungi may produce certain mycotoxins which have carcinogenic, mutagenic, teratogenic, and immunosuppressive effect on humans and animals alike. Fruitbodies of Pleurotus ostreatus were solar dried at a moisture content of 12.5 ± 0.2% and stored in polythene and polypropylene packs, gamma irradiated at doses of 0 (control), 1, 2, 3, 4, and 5 kGy at a dose rate of 1.7 kGy/hr from a Cobalt 60 source (SLL, 515, Hungary) and stored at room temperature 28-30°C for a period of 12 months...
January 2018: Food Science & Nutrition
https://www.readbyqxmd.com/read/29385857/fatty-acids-from-oleaginous-yeasts-and-yeast-like-fungi-and-their-potential-applications
#11
Si-Jia Xue, Zhe Chi, Yu Zhang, Yan-Feng Li, Guang-Lei Liu, Hong Jiang, Zhong Hu, Zhen-Ming Chi
PURPOSE: Oleaginous yeasts, fatty acids biosynthesis and regulation in the oleaginous yeasts and the fatty acids from the oleaginous yeasts and their applications are reviewed in this article. RESULTS: Oleaginous yeasts such as Rhodosporidium toruloides, Yarrowia lipolytica, Rhodotorula mucilaginosa, and Aureobasidium melanogenum, which can accumulate over 50% lipid of their cell dry weight, have many advantages over other oleaginous microorganisms. The fatty acids from the oleaginous yeasts have many potential applications...
February 1, 2018: Critical Reviews in Biotechnology
https://www.readbyqxmd.com/read/29368026/fungal-diversity-of-human-gut-microbiota-among-eutrophic-overweight-and-obese-individuals-based-on-aerobic-culture-dependent-approach
#12
Francis M Borges, Thaís O de Paula, Marjorie R A Sarmiento, Maycon G de Oliveira, Maria L M Pereira, Isabela V Toledo, Thiago C Nascimento, Alessandra B Ferreira-Machado, Vânia L Silva, Cláudio G Diniz
Fungi have a complex role in the intestinal tract, influencing health and disease, with dysbiosis contributing to obesity. Our objectives were to investigate fungal diversity in human gut microbiota among eutrophic, overweight, and obese. Epidemiological and nutritional information were collected from adult individuals, as well as stool samples processed for selective fungi isolation and identification by matrix-assisted laser desorption ionization time-of-flight mass spectrometry (yeasts) or microculture (filamentous fungi)...
January 24, 2018: Current Microbiology
https://www.readbyqxmd.com/read/29335484/microbial-competition-of-rhodotorula-mucilaginosa-uanl-001l-and-e-coli-increase-biosynthesis-of-non-toxic-exopolysaccharide-with-applications-as-a-wide-spectrum-antimicrobial
#13
Augusto Vazquez-Rodriguez, Ximena G Vasto-Anzaldo, Daniel Barboza Perez, Eduardo Vázquez-Garza, Héctor Chapoy-Villanueva, Gerardo García-Rivas, Javier A Garza-Cervantes, Jéssica J Gómez-Lugo, Alma Elizabeth Gomez-Loredo, Maria Teresa Garza Gonzalez, Xristo Zarate, Jose Ruben Morones-Ramirez
Bacterial species are able to colonize and establish communities in biotic and abiotic surfaces. Moreover, within the past five decades, incidence of bacterial strains resistant to currently used antibiotics has increased dramatically. This has led to diverse health issues and economical losses for different industries. Therefore, there is a latent need to develop new and more efficient antimicrobials. This work reports an increased production of an exopolysaccharide in a native yeast strain isolated from the Mexican Northeast, Rhodotorula mucilaginosa UANL-001L, when co-cultured with E...
January 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330184/microbiomes-in-dishwashers-analysis-of-the-microbial-diversity-and-putative-opportunistic-pathogens-in-dishwasher-biofilm-communities
#14
Prem Krishnan Raghupathi, Jerneja Zupančič, Asker Daniel Brejnrod, Samuel Jacquiod, Kurt Houf, Mette Burmølle, Nina Gunde-Cimerman, Søren J Sørensen
Extreme habitats are not only limited to natural environments, but also apply to man-made systems, for instance household appliances such as dishwashers. Limiting factors, such as high temperatures, high and low pH, high NaCl concentrations, presence of detergents and shear force from water during washing cycles define the microbial survival in this extreme system. Fungal and bacterial diversity in biofilms isolated from rubber seals of 24 different household dishwashers were investigated using next generation sequencing...
January 12, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29313463/production-and-partial-characterization-of-%C3%AE-1-3-glucanase-obtained-from-rhodotorula-oryzicola
#15
Mona Liza Santana, Elinalva Maciel Paulo, José Ailton Bispo, Amanda Reges de Sena, Sandra Aparecida de Assis
The current study aims to assess the kinetics of population growth of R. oryzicola and the production of β-1,3-glucanase (EC 3.2.1.39) enzyme by this yeast. It also aims to obtain the optimum conditions of β-1,3-glucanase enzymatic activity by varying the pH as well as to study the enzyme thermostability. R. oryzicola population doubled within 12 hours. During this period, 9.26 generations were obtained, with 1 hour and 29 minutes interval from one generation to the other, with specific growth rate (µ) of 0...
January 9, 2018: Preparative Biochemistry & Biotechnology
https://www.readbyqxmd.com/read/29311198/fungal-peritonitis-caused-by-rhodotorula-mucilaginosa-in-a-capd-patient-treated-with-liposomal-amphotericin-b-a-case-report-and-literature-review
#16
Frédéric Franconieri, Julie Bonhomme, Aline Doriot, Cécile Bonnamy, Maxence Ficheux, Thierry Lobbedez, Clémence Béchade
Rhodotorula mucilaginosa is a ubiquitous yeast that may cause serious peritoneal dialysis (PD) infections. A 70-year-old man receiving continuous ambulatory peritoneal dialysis (CAPD) for 6 months presented with a PD infection caused by Rhodotorula mucilaginosa The patient was treated with intravenous liposomal amphotericin B. His peritoneal catheter was simultaneously removed and reinserted. To date, only 10 cases of Rhodotorula CAPD infections have been reported. Catheters, corticoids, cancer, and previous antibiotic therapy were the main risk factors for these infections...
January 2018: Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
https://www.readbyqxmd.com/read/29304415/biodegradation-and-detoxification-of-aliphatic-and-aromatic-hydrocarbons-by-new-yeast-strains
#17
Mohamed Hashem, Saad A Alamri, Sharefah S A A Al-Zomyh, Sulaiman A Alrumman
Seeking new efficient hydrocarbon-degrading yeast stains was the main goal of this study. Because microorganisms are greatly affected by the environmental factors, the biodegradation potentiality of the microorganisms varies from climatic area to another. This induces research to develop and optimize the endemic organisms in bioremediation technology. In this study, 67 yeast strains were tested for their growth potentiality on both aliphatic and aromatic hydrocarbons. The most efficient six strains were identified using sequence analysis of the variable D1/D2 domain of the large subunit 26S ribosomal DNA...
January 2, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29261697/microbial-cells-can-cooperate-to-resist-high-level-chronic-ionizing-radiation
#18
Igor Shuryak, Vera Y Matrosova, Elena K Gaidamakova, Rok Tkavc, Olga Grichenko, Polina Klimenkova, Robert P Volpe, Michael J Daly
Understanding chronic ionizing radiation (CIR) effects is of utmost importance to protecting human health and the environment. Diverse bacteria and fungi inhabiting extremely radioactive waste and disaster sites (e.g. Hanford, Chernobyl, Fukushima) represent new targets of CIR research. We show that many microorganisms can grow under intense gamma-CIR dose rates of 13-126 Gy/h, with fungi identified as a particularly CIR-resistant group of eukaryotes: among 145 phylogenetically diverse strains tested, 78 grew under 36 Gy/h...
2017: PloS One
https://www.readbyqxmd.com/read/29248114/inactivation-of-bacterial-quorum-sensing-signals-n-acyl-homoserine-lactones-is-widespread-in-yeasts
#19
Ana Carolina Del V Leguina, Carolina Nieto, Hipólito M Pajot, Elisa V Bertini, Walter Mac Cormack, Lucía I Castellanos de Figueroa, Carlos G Nieto-Peñalver
The inactivation of quorum sensing signals, a phenomenon known as quorum quenching, has been described in diverse microorganisms, though it remains almost unexplored in yeasts. Beyond the well-known properties of these microorganisms for the industry or as eukaryotic models, the role of yeasts in soil or in the inner tissues of a plant is largely unknown. In this report, the wider survey of quorum quenching activities in yeasts isolated from Antarctic soil and the inner tissues of sugarcane, a tropical crop, is presented...
January 2018: Fungal Biology
https://www.readbyqxmd.com/read/29247617/tinea-capitis-like-infection-caused-by-rhodotorula-mucilaginosa-in-a-shelter-for-african-refugee-children-in-northern-israel
#20
Avi Peretz, Orna Nitzan, Victoria Freidus, Riad Kassem
Rhodotorula is a genus of unicellular pigmented yeasts, part of the division Basidiomycota. In this article, we report three cases of refugee children in a day care shelter in northern Israel who were clinically diagnosed and treated empirically as with ringworm infection but with clean and exclusive growth of Rhodotorula mucilaginosa in repeated cultures of several skin samples. Skin infections caused by this yeast are rare and there are few reports in the literature, mainly in patients who are immunocompromised...
December 13, 2017: Acta Tropica
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