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BMC Microbiology

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https://www.readbyqxmd.com/read/28818052/proteomic-analysis-during-of-spore-germination-of-moniliophthora-perniciosa-the-causal-agent-of-witches-broom-disease-in-cacao
#1
Joise Hander Mares, Karina Peres Gramacho, Everton Cruz Santos, André da Silva Santiago, Juliano Oliveira Santana, Aurizângela Oliveira de Sousa, Fátima Cerqueira Alvim, Carlos Priminho Pirovani
BACKGROUND: Moniliophthora perniciosa is a phytopathogenic fungus responsible for witches' broom disease of cacao trees (Theobroma cacao L.). Understanding the molecular events during germination of the pathogen may enable the development of strategies for disease control in these economically important plants. In this study, we determined a comparative proteomic profile of M. perniciosa basidiospores during germination by two-dimensional SDS-PAGE and mass spectrometry. RESULTS: A total of 316 proteins were identified...
August 17, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28818050/administration-of-two-probiotic-strains-during-early-childhood-does-not-affect-the-endogenous-gut-microbiota-composition-despite-probiotic-proliferation
#2
Martin Frederik Laursen, Rikke Pilmann Laursen, Anni Larnkjær, Kim F Michaelsen, Martin Iain Bahl, Tine Rask Licht
BACKGROUND: Probiotics are increasingly applied to prevent and treat a range of infectious, immune related and gastrointestinal diseases. Despite this, the mechanisms behind the putative effects of probiotics are poorly understood. One of the suggested modes of probiotic action is modulation of the endogenous gut microbiota, however probiotic intervention studies in adults have failed to show significant effects on gut microbiota composition. The gut microbiota of young children is known to be unstable and more responsive to external factors than that of adults...
August 17, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28818043/erratum-to-re-classification-within-the-serogroups-o3-and-o8-of-citrobacter-strains
#3
Ewa Katzenellenbogen, Magdalena Staniszewska, Nina A Kocharova, Małgorzata Mieszała, Agnieszka Korzeniowska-Kowal, Sabina Górska, Yuriy A Knirel, Andrzej Gamian
No abstract text is available yet for this article.
August 17, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28818037/association-of-coral-algal-symbionts-with-a-diverse-viral-community-responsive-to-heat-shock
#4
Jan D Brüwer, Shobhit Agrawal, Yi Jin Liew, Manuel Aranda, Christian R Voolstra
BACKGROUND: Stony corals provide the structural foundation of coral reef ecosystems and are termed holobionts given they engage in symbioses, in particular with photosynthetic dinoflagellates of the genus Symbiodinium. Besides Symbiodinium, corals also engage with bacteria affecting metabolism, immunity, and resilience of the coral holobiont, but the role of associated viruses is largely unknown. In this regard, the increase of studies using RNA sequencing (RNA-Seq) to assess gene expression provides an opportunity to elucidate viral signatures encompassed within the data via careful delineation of sequence reads and their source of origin...
August 17, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28797225/environmentally-triggered-genomic-plasticity-and-capsular-polysaccharide-formation-are-involved-in-increased-ethanol-and-acetic-acid-tolerance-in-kozakia-baliensis-nbrc-16680
#5
Julia U Brandt, Friederike-Leonie Born, Frank Jakob, Rudi F Vogel
BACKGROUND: Kozakia baliensis NBRC 16680 secretes a gum-cluster derived heteropolysaccharide and forms a surface pellicle composed of polysaccharides during static cultivation. Furthermore, this strain exhibits two colony types on agar plates; smooth wild-type (S) and rough mutant colonies (R). This switch is caused by a spontaneous transposon insertion into the gumD gene of the gum-cluster, resulting in a heteropolysaccharide secretion deficient, rough phenotype. To elucidate, whether this is a directed switch triggered by environmental factors, we checked the number of R and S colonies under different growth conditions including ethanol and acetic acid supplementation...
August 10, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28793882/rpon2-and-flia-regulated-flitx-is-indispensible-for-flagellar-motility-and-virulence-in-xanthomonas-oryzae-pv-oryzae
#6
Chao Yu, Huamin Chen, Fang Tian, Fenghuan Yang, Chenyang He
BACKGROUND: Bacterial blight of rice caused by Xanthomonas oryzae pv. oryzae (Xoo) is one of the most important crop diseases in the world. More insights into the mechanistic regulation of bacterial pathogenesis will help us identify novel molecular targets for developing effective disease control strategies. A large flagellar gene cluster is regulated under a three-tiered hierarchy by σ(54) factor RpoN2 and its activator FleQ, and σ(28) factor FliA. A hypothetical protein gene fliTX is located upstream of rpoN2, however, how it is regulated and how it is related to bacterial behaviors remain to be elucidated...
August 9, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28774286/development-of-a-new-fluorescent-reporter-operator-system-location-of-arac-regulated-genes-in-escherichia-coli-k-12
#7
Laura E Sellars, Jack A Bryant, María-Antonia Sánchez-Romero, Eugenio Sánchez-Morán, Stephen J W Busby, David J Lee
BACKGROUND: In bacteria, many transcription activator and repressor proteins regulate multiple transcription units that are often distally distributed on the bacterial genome. To investigate the subcellular location of DNA bound proteins in the folded bacterial nucleoid, fluorescent reporters have been developed which can be targeted to specific DNA operator sites. Such Fluorescent Reporter-Operator System (FROS) probes consist of a fluorescent protein fused to a DNA binding protein, which binds to an array of DNA operator sites located within the genome...
August 3, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28750626/biogeographical-distribution-analysis-of-hydrocarbon-degrading-and-biosurfactant-producing-genes-suggests-that-near-equatorial-biomes-have-higher-abundance-of-genes-with-potential-for-bioremediation
#8
Jorge S Oliveira, Wydemberg J Araújo, Ricardo M Figueiredo, Rita C B Silva-Portela, Alaine de Brito Guerra, Sinara Carla da Silva Araújo, Carolina Minnicelli, Aline Cardoso Carlos, Ana Tereza Ribeiro de Vasconcelos, Ana Teresa Freitas, Lucymara F Agnez-Lima
BACKGROUND: Bacterial and Archaeal communities have a complex, symbiotic role in crude oil bioremediation. Their biosurfactants and degradation enzymes have been in the spotlight, mainly due to the awareness of ecosystem pollution caused by crude oil accidents and their use. Initially, the scientific community studied the role of individual microbial species by characterizing and optimizing their biosurfactant and oil degradation genes, studying their individual distribution. However, with the advances in genomics, in particular with the use of New-Generation-Sequencing and Metagenomics, it is now possible to have a macro view of the complex pathways related to the symbiotic degradation of hydrocarbons and surfactant production...
July 27, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28750622/re-classification-within-the-serogroups-o3-and-o8-of-citrobacter-strains
#9
Ewa Katzenellenbogen, Magdalena Staniszewska, Nina A Kocharova, Małgorzata Mieszała, Agnieszka Korzeniowska-Kowal, Sabina Górska, Yuriy A Knirel, Andrzej Gamian
BACKGROUND: Citrobacter strains are opportunistic pathogens often responsible for serious enteric as well as extra-intestinal diseases, and therefore the O-antigenic scheme, still in use in diagnostic identification, should be set for proper serotyping. The structures of more than 30 different Citrobacter O-antigens (O-polysaccharide chains of the lipopolysaccharides) of 43 Citrobacter O-serogroups have been elucidated so far. However, relationships between strains in several heterogeneous serogroups still need to be clarified by immunochemical studies...
July 27, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28747178/anaerobic-bacteria-growth-in-the-presence-of-cathelicidin-ll-37-and-selected-ceragenins-delivered-as-magnetic-nanoparticles-cargo
#10
Bonita Durnaś, Ewelina Piktel, Marzena Wątek, Tomasz Wollny, Stanisław Góźdź, Jolanta Smok-Kalwat, Katarzyna Niemirowicz, Paul B Savage, Robert Bucki
BACKGROUND: Cationic antibacterial peptides (CAPs) and synthetic molecules mimicking the amphiphilic structure of CAPs, such as ceragenins, are promising compounds for the development of new antimicrobials. RESULTS: We tested the in vitro activity of ceragenins CSA-13 and CSA-131 against several anaerobic bacteria including Bacteroides spp. and Clostridium difficile. We compared results to the activity of cathelicidin LL-37, metronidazole and nanosystems developed by attachment of CSA-13 and CSA-131 to magnetic nanoparticles (MNPs)...
July 26, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28743239/acid-tolerance-properties-of-dental-biofilms-in-vivo
#11
A Senneby, J R Davies, G Svensäter, J Neilands
BACKGROUND: The ecological plaque hypothesis explains caries development as the result of the enrichment of acid tolerant bacteria in dental biofilms in response to prolonged periods of low pH. Acid production by an acid tolerant microflora causes demineralisation of tooth enamel and thus, individuals with a greater proportion of acid tolerant bacteria would be expected to be more prone to caries development. Biofilm acid tolerance could therefore be a possible biomarker for caries prediction...
July 25, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28743231/genome-wide-comparative-analysis-of-putative-pth11-related-g-protein-coupled-receptors-in-fungi-belonging-to-pezizomycotina
#12
Xihui Xu, Guopeng Li, Lu Li, Zhenzhu Su, Chen Chen
BACKGROUND: G-protein coupled receptors (GPCRs) are the largest family of transmembrane receptors in fungi, where they play important roles in signal transduction. Among them, the Pth11-related GPCRs form a large and divergent protein family, and are only found in fungi in Pezizomycotina. However, the evolutionary process and potential functions of Pth11-related GPCRs remain largely unknown. RESULTS: Twenty genomes of fungi in Pezizomycotina covering different nutritional strategies were mined for putative Pth11-related GPCRs...
July 25, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28738838/improved-detection-of-genus-specific-alphavirus-using-a-generic-taqman%C3%A2-assay
#13
Claude Giry, Bénédicte Roquebert, Ghislaine Li-Pat-Yuen, Philippe Gasque, Marie-Christine Jaffar-Bandjee
BACKGROUND: Alphaviruses are arthropod borne RNA viruses of medical importance. Geographical expansion of mosquitoes of the Aedes genus in the past decades has been associated with major Alphavirus-associated outbreaks. Climate changes and intensification of air travels have favored vector expansion and virus dissemination in new territories leading to virus emergence not only in tropical areas but also in temperate regions. The detection of emergence is based upon surveillance networks with epidemiological and laboratory investigation...
July 24, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28732479/an-integrated-computational-experimental-approach-reveals-yersinia-pestis-genes-essential-across-a-narrow-or-a-broad-range-of-environmental-conditions
#14
Nicola J Senior, Kalesh Sasidharan, Richard J Saint, Andrew E Scott, Mitali Sarkar-Tyson, Philip M Ireland, Helen L Bullifent, Z Rong Yang, Karen Moore, Petra C F Oyston, Timothy P Atkins, Helen S Atkins, Orkun S Soyer, Richard W Titball
BACKGROUND: The World Health Organization has categorized plague as a re-emerging disease and the potential for Yersinia pestis to also be used as a bioweapon makes the identification of new drug targets against this pathogen a priority. Environmental temperature is a key signal which regulates virulence of the bacterium. The bacterium normally grows outside the human host at 28 °C. Therefore, understanding the mechanisms that the bacterium used to adapt to a mammalian host at 37 °C is central to the development of vaccines or drugs for the prevention or treatment of human disease...
July 21, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28724349/16s-rrna-gene-based-association-study-identified-microbial-taxa-associated-with-pork-intramuscular-fat-content-in-feces-and-cecum-lumen
#15
Shaoming Fang, Xingwei Xiong, Ying Su, Lusheng Huang, Congying Chen
BACKGROUND: Intramuscular fat (IMF) that deposits among muscle fibers or within muscle cells is an important meat quality trait in pigs. Previous studies observed the effects of dietary nutrients and additives on improving the pork IMF. Gut microbiome plays an important role in host metabolism and energy harvest. Whether gut microbiota exerts effect on IMF remains unknown. RESULTS: In this study, we investigated the microbial community structure of 500 samples from porcine cecum and feces using high-throughput 16S rRNA gene sequencing...
July 19, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28720084/sequence-based-identification-of-inositol-monophosphatase-like-histidinol-phosphate-phosphatases-hisn-in-corynebacterium-glutamicum-actinobacteria-and-beyond
#16
Robert Kasimir Kulis-Horn, Christian Rückert, Jörn Kalinowski, Marcus Persicke
BACKGROUND: The eighth step of L-histidine biosynthesis is carried out by an enzyme called histidinol-phosphate phosphatase (HolPase). Three unrelated HolPase families are known so far. Two of them are well studied: HAD-type HolPases known from Gammaproteobacteria like Escherichia coli or Salmonella enterica and PHP-type HolPases known from yeast and Firmicutes like Bacillus subtilis. However, the third family of HolPases, the inositol monophosphatase (IMPase)-like HolPases, present in Actinobacteria like Corynebacterium glutamicum (HisN) and plants, are poorly characterized...
July 18, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28716079/the-human-jejunum-has-an-endogenous-microbiota-that-differs-from-those-in-the-oral-cavity-and-colon
#17
Olof H Sundin, Antonio Mendoza-Ladd, Mingtao Zeng, Diana Diaz-Arévalo, Elisa Morales, B Matthew Fagan, Javier Ordoñez, Philip Velez, Nishaal Antony, Richard W McCallum
BACKGROUND: The upper half of the human small intestine, known as the jejunum, is the primary site for absorption of nutrient-derived carbohydrates, amino acids, small peptides, and vitamins. In contrast to the colon, which contains 10(11)-10(12) colony forming units of bacteria per ml (CFU/ml), the normal jejunum generally ranges from 10(3) to 10(5) CFU per ml. Because invasive procedures are required to access the jejunum, much less is known about its bacterial microbiota. Bacteria inhabiting the jejunal lumen have been investigated by classical culture techniques, but not by culture-independent metagenomics...
July 17, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28709400/broad-range-potential-of-asphodelus-microcarpus-leaves-extract-for-drug-development
#18
Amalia Di Petrillo, Antonella Fais, Francesca Pintus, Celestino Santos-Buelga, Ana M González-Paramás, Vincenzo Piras, Germano Orrù, Antonello Mameli, Enzo Tramontano, Aldo Frau
BACKGROUND: Many plants have been used in traditional medicine for their antibacterial, antifungal, antiprotozoal, antiviral, antidiarrhoeal, analgesic, antimalarial, antioxidant, anti-inflammatory and anticancer activities. In order to find novel antimicrobial and antiviral agents, the aim of the present study was the evaluation of the antibacterial and antibiofilm susceptibility of Asphodelus microcarpus leaves extract. Moreover, the antiviral activity and the phytochemical composition of the active extract were also determined...
July 14, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28701186/the-oral-fungal-mycobiome-characteristics-and-relation-to-periodontitis-in-a-pilot-study
#19
Brandilyn A Peters, Jing Wu, Richard B Hayes, Jiyoung Ahn
BACKGROUND: The oral fungal microbiome (mycobiome) is not well characterized, particularly in relation to oral diseases such as periodontal disease. We aimed to describe and compare the oral mycobiome of subjects with and without periodontal disease. RESULTS: We characterized the oral mycobiome in 30 adult subjects (15 with periodontal disease, 15 with good oral health) by sequencing the taxonomically informative pan-fungal internal transcribed spacer (ITS) gene in DNA extracted from oral wash samples...
July 12, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28701150/physiological-roles-of-sigma-factor-sigd-in-corynebacterium-glutamicum
#20
Hironori Taniguchi, Tobias Busche, Thomas Patschkowski, Karsten Niehaus, Miroslav Pátek, Jörn Kalinowski, Volker F Wendisch
BACKGROUND: Sigma factors are one of the components of RNA polymerase holoenzymes, and an essential factor of transcription initiation in bacteria. Corynebacterium glutamicum possesses seven genes coding for sigma factors, most of which have been studied to some detail; however, the role of SigD in transcriptional regulation in C. glutamicum has been mostly unknown. RESULTS: In this work, pleiotropic effects of sigD overexpression at the level of phenotype, transcripts, proteins and metabolites were investigated...
July 12, 2017: BMC Microbiology
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