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Stenotrophomonas maltophilia

ABSTRACT: Opportunistic pathogen Stenotrophomonas maltophilia

PROVIDER: PRJNA380601 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	NEQO01.dat.gz	Other
	NEQO01.fasta.gz	Fasta.gz
	NEQO01.master.dat	Other
	NEQP01.dat.gz	Other
	NEQP01.fasta.gz	Fasta.gz

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Functional characterization of the RNA chaperone Hfq in opportunistic human pathogen Stenotrophomonas maltophilia

Project description:Stenotrophomonas maltophilia is an important opportunistic pathogen affecting primarily hospitalized and immuno-compromised hosts. We constructed an hfq deletion mutant (Delta-hfq) of S. maltophilia, and compared the behaviour of wild-type and Delta-hfq S. maltophilia cells in a variety of assays. Differential RNA sequencing analysis (dRNA-seq) of RNA isolated from S. maltophilia wild-type and Delta-hfq strains showed that Hfq regulates expression of genes encoding flagellar and fimbrial components, transmembrane proteins, as well as enzymes involved in different metabolic pathways. Moreover, we analysed expression of several sRNAs identified by dRNA-seq in wild-type. The accumulation of two sRNAs was strongly reduced in the absence of Hfq. TEX (terminator exonuclease) treated and untreated libraries of the wild type and the Delta-hfq mutant were sequenced and compared

2012-10-02 | E-GEOD-39705 | biostudies-arrayexpress

Functional characterization of the RNA chaperone Hfq in opportunistic human pathogen Stenotrophomonas maltophilia

2012-10-02 | GSE39705 | GEO

Global transcriptome analysis of Stenotrophomonas maltophilia in response to human body temperature

Project description:Stenotrophomonas maltophilia is an emerging multidrug resistance opportunistic pathogen affecting immunocompromised and hospitalized patients. S. maltophilia is an environmental bacterium which adapts to human body and causing infection. S. rhizophilia, a non-pathogenic and phylogenetic neighbour of S. maltophilia is unable to grow at human body temperature. Thus, to understand molecular mechanism underlying the adaptation of S. maltophilia at human body temperature, we performed the comparative transcriptome analysis of S.maltophilia at 28 °C (representative for the environmental niches) and 37 °C (representative for human body) by using RNA-Seq. The major temperature-induced genes include genes for Type IV secretion system, aerotaxis, and cation diffusion facilitator family transporter suggesting its potential role in the adaptation and virulence of S. maltophilia. The downregulated genes at 37 °C includes the genes for the cell motility, energy generation and metabolism, lipid metabolism, translation, amino acid metabolism and transport, replication and repair, inorganic ion and transport metabolism lipid metabolism, coenzyme metabolism.

2021-01-11 | GSE101926 | GEO

A transcriptomic and functional analysis of the interaction between Caenorhabditis elegans and Stenotrophomonas maltophilia

Project description:The goal of this study was to elucidate genes that are employed by the bacterivorous nematode Caenorhabditis elegans to respond to the emerging nosocomial bacterial pathogen Stenotrophomonas maltophilia.

2018-02-01 | GSE107272 | GEO

A novel TetR-like transcriptional regulator in Stenotrophomonas maltophilia is involved in fatty acid metabolism, including quorum sensing signal turnover

Project description:Stenotrophomonas maltophilia is an emerging opportunistic multidrug-resistant pathogen frequently co-isolated with other relevant nosocomial pathogens in respiratory tract infections. S. maltophilia uses the endogenous DSF quorum sensing (QS) system to regulate virulence processes but can also respond to exogenous AHL signals produced by neighboring bacteria. A whole-transcriptome sequencing analysis was performed for S. maltophilia strain K279a in the exponential and stationary phases and in exponential cultures after a treatment with exogenous DSF or AHLs. Among the common top upregulated genes, the putative TetR-like regulator Smlt2053 was selected for functional characterization. This regulator was found to sense long-chain fatty acids, including the QS signal DSF, and activate a β-oxidation catabolic pathway.

2023-05-16 | GSE206554 | GEO

Stenotrophomonas maltophilia FLR19 response to pH

Project description:We sought to determine how a cystic fibrosis isolate of Stenotrophomonas maltophilia responds to relevant pH gradients (pH 5, 7, and 9) by growing the bacterium in phosphate buffered media and conducting RNAseq experiments. Our data suggests acidic conditions are stressful for strain FLR19, as it responded by increasing expression of stress-response and antibiotic-resistance genes.

2018-10-17 | GSE121347 | GEO

Stenotrophomonas maltophilia

Project description:Functional characterization of the RNA chaperone Hfq in opportunistic human pathogen Stenotrophomonas maltophilia

| PRJNA171533 | ENA

Transcriptional responses of K. pneumoniae, S. maltophilia, P.aeruginosa, and B. thailandensis exposed to lung surfactant

Project description:The interactions between Gram-negative respiratory pathogens and the host environment at the site of infection largely unknown. Pulmonary surfactant serves as an initial point of contact for inhaled bacteria entering the lung and is thought to contain molecular cues that aid colonization and pathogenesis. To gain insight into this ecological transition, we characterized the transcriptional responses of Pseudomonas aeruginosa PA14, Burkholderia thailandensis E264, Klebsiella pneumoniae MGH 78578, and Stenotrophomonas maltophilia K279A exposed to purified pulmonary surfactant (Survanta) through microarrays. This study provides novel insight into the interactions occurring between Gram-negative opportunistic pathogens and the host at an important infection site, and demonstrates the utility of purified lung surfactant preparations for dissecting host-lung pathogen interactions in vitro. The goal of this study was to compare the transcriptional responses of Pseudomonas aeruginosa PA14, Burkholderia thailandensis E264, Klebsiella pneumoniae MGH 78578, and Stenotrophomonas maltophilia K279A exposed to pulmonary surfactant using a custom affymetrix chip designed for their genomes. The goal of this study was to compare the transcriptional responses of Pseudomonas aeruginosa PA14, Burkholderia thailandensis E264, Klebsiella pneumoniae MGH 78578, and Stenotrophomonas maltophilia K279A exposed to pulmonary surfactant using a custom affymetrix chip designed for their genomes.

2018-03-30 | GSE110628 | GEO

Half-lives mRNA analysis of Stenotrophomonas maltophilia D457 and rng-deficient mutant

Project description:We calculated half-life values of mRNAs quantified by RNA-Seq by a suitable method of normalization. We determined the half-lives of more than 2200 mRNAs in the Stenotrophomonas maltophilia D457 wild-type strain and in an isogenic RNase G deficient mutant. Median half-lives were 2,74 and 3 min in the wild-type and the rng-deficient mutant respectively. We found an overall enhancement of half-life times of mRNAs when the gene encoding RNase G is lacking, showing that many RNAs are targets of RNase G in S. maltophilia. For achieving such goal, we propose a method for the normalization of RNA-Seq based studies on global bacterial mRNA decay.

2017-09-06 | GSE103467 | GEO

Identifying genes of Escherichia coli involved in interactions with Stenotrophomonas maltophilia in planktonic cultures and biofilms using transcriptomic analysis

Project description:Biofilm formation by Escherichia coli was significantly inhibited when co-cultured with Stenotrophomonas maltophilia in static systems. Genes of E. coli involved in species interactions with S. maltophilia were identified in order to allow the study of the mechanisms of inhibited E. coli biofilm formation in co-culture. A total of 89 and 108 genes were identified as differentially expressed in mixed species cultures when growing as biofilm and as planktonic cultures, respectively, compared to the counterpart of pure cultured E. coli. Differential expression of certain identified genes was confirmed using E. coli reporter strains combined with single-cell based flow cytometry analysis. Co-culture with S. maltophilia affected genes involved in metabolism, signal transduction, cell wall composition, and biofilm formation of E. coli. Several selected genes were further confirmed as affecting E. coli biofilm formation in mixed species cultures with S. maltophilia. The data suggest that these genes were involved in species interactions between E. coli and S. maltophilia. This SuperSeries is composed of the SubSeries listed below. Refer to individual Series.

2013-12-30 | E-GEOD-24915 | biostudies-arrayexpress

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