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Bifidobacterium thermophilum

ABSTRACT: Bifidobacterium thermophilum overview

PROVIDER: PRJNA194051 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	JAWVAY01.dat.gz	Other
	JAWVAY01.fasta.gz	Fasta.gz
	JAWVAY01.master.dat	Other
	JGZV01.dat.gz	Other

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Transcriptome response of Salmonella enterica subsp. enterica serovar Typhimurium N-15 and Bifidobacterium thermophilum RBL67 in co-culture

Project description:Bifidobacterium thermophilum RBL67 (RBL67), a human fecal isolate and promising probiotic candidate, showed antagonistic and protective effects against Salmonella and Listeria in vitro. However, the underlying mechanisms fostering these health-related effects remain unknown. Therefor the transcriptome response of RBL67 and Salmonella enterica subsp. enterica serovar Typhimurium N-15 (N-15) in co-culture compared to the response in their respective mono-cultures. RNA was extracted from culture samples taken after 4 (N-15) or 5 h (RBL67) and RNAseq was performed on an Illumina HiSeq 2000 sequencer. Three biological replciates were performed resulting in 12 data sets: 3 RBL67 mono culture, 3 N15 mono-culture, 3 RBL67 co-culture, 3 N15 co-culture. Our study provided first insights into probiotic-pathogen interaction on transcriptional level and suggests a mechanism for how probiotic organisms can protect the host from infections.

2015-03-31 | GSE65716 | GEO

Transcriptome response of Salmonella enterica subsp. enterica serovar Typhimurium N-15 and Bifidobacterium thermophilum RBL67 in co-culture

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Thermodesulfobacterium thermophilum

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Identification and characterization of sugar regulated promoters in Chaetomium thermophilum

Project description:The thermophilic fungus Chaetomium thermophilum has been successfully used in the past for biochemical and high resolution structural studies of protein complexes, but subsequent functional analysis of these assemblies were hindered due to the lack of genetic tools in this thermophile, which are typically amenable in several other mesophilic eukaryotic model organisms, in particular the yeast Saccharomycers cerevisiae. Hence, we aimed to develop a regulatable gene-expression system in C. thermophilum, which might facilitate such in vivo studies, based on what we know about the galactose-inducible GAL promoter in yeast. To identify sugar-regulatable promoters in C. thermophilum, we performed comparative xylose- versus glucose-dependent gene expression studies, which uncovered a number of enzymes induced by xylose but repressed by glucose. Subsequently, we cloned the promoters of the two most stringently regulated genes, the xylosidase-like gene (XYL) and xylitol dehydrogenase (XDH), obtained from this genome-wide analysis in front of the thermostable YFP (yellow fluorescent protein) reporter. In this way, we could demonstrate xylose-dependent YFP expression by either western blotting or life cell imaging fluorescence microscopy. Prompted by these results, we finally expressed a well-characterized dominant-negative ribosome assembly factor mutant, rsa4 E117>D, under the control of the XDH promoter, which allowed us to induce a nuclear export defect of the pre-60S subunit when C. thermophilum cells were grown in xylose but not glucose containing medium. Altogether, our study recognized xylose-regulatable promoters in Chaetomium thermophilum, which may foster functional studies of genes of interest in this thermophilic eukaryotic model organism.

2022-09-26 | GSE214043 | GEO

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