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The interplay between a protein and an mRNA antagonist controls CsrA-mediated regulation of flagella genes in Campylobacter jejuni

ABSTRACT: This study investigates the CsrA regulon of the food-borne pathogen Campylobacter jejuni. Direct RNA binding targets of CsrA in two strains of C. jejuni, NCTC11168 and 81-176, were determined using RIP-seq.

ORGANISM(S): Campylobacter jejuni subsp. jejuni 81-176 Campylobacter jejuni subsp. jejuni NCTC 11168 = ATCC 700819

PROVIDER: GSE58419 | GEO | 2016/04/07

SECONDARY ACCESSION(S): PRJNA252559

REPOSITORIES: GEO

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The interplay between a protein and an mRNA antagonist controls CsrA-mediated regulation of flagella genes in Campylobacter jejuni

Project description:This study investigates the CsrA regulon of the food-borne pathogen Campylobacter jejuni. Direct RNA binding targets of CsrA in two strains of C. jejuni, NCTC11168 and 81-176, were determined using RIP-seq. Identification of CsrA binding sites in two C. jejuni strains using RIP-seq

2016-04-07 | E-GEOD-58419 | biostudies-arrayexpress

Campylobacter jejuni gene expression in germ-free mice

2011-04-14 | GSE28578 | GEO

Campylobacter jejuni gene expression in germ-free mice

Project description:Expression arrays comparing Campylobacter jejuni NCTC11168 during growth in the cecum of germ-free C57 BL/6 IL-10 knockout mice to C. jejuni NCTC11168 during growth in Bolton broth. Four biological replicates comparing C. jejuni NCTC11168 growth in vivo to in vitro. Two biological replicates were dye swaps.

2011-04-14 | E-GEOD-28578 | biostudies-arrayexpress

Investigation of the regulon and RNA targets of RNase Y in Campylobacter jejuni

Project description:RNA-seq was used to study gene expression profiles and potential processing sites in Campylobacter jejuni NCTC11168 wildtype and RNase Y (rny, Cj1209) deletion.

2024-05-16 | GSE230835 | GEO

Investigation of transcript 3' ends in Campylobacter jejuni wildtype and ribonuclease mutants

Project description:Termination site sequencing (term-seq) (Dar et al., 2016) was used to map transcript 3' ends and potential processing sites in Campylobacter jejuni NCTC11168 wildtype and ribonuclease deletion strains.

2024-05-16 | GSE230837 | GEO

The transcriptome of erythromycin-resistant Campylobacter jejuni strain selected from NCTC 11168

Project description:Campylobacter, a major foodborne pathogen, is increasingly resistant to macrolide antibibotics. Previous findings suggested that development of macrolide resistance in Campylobacter requires a multi-step process, but the molecular mechanisms involved in the process are not known. In our study, erythromycin-resistant C. jejuni mutant (R) was selected in vitro by stepwise exposure of C. jejuni NCTC11168(S) to increasing concentrations of erythromycin.The resistant were subjected to microarray and the the global transcriptional profile was analyzed. In this series, DNA microarray was used to compare the gene expression profiles of the macrolide-resistant strain with its parent wild-type strain NCTC11168. A large number of gene showed significant changes in R. The up-regulated genes in the resistant strains are involved in miscellaneous periplasmic proteins, efflux protein and putative aminotransferase, while the majority of the down-regulated genes are involved in electron transport, lipoprotein, heat shock protein and unknown function proteins. The over-expression of efflux pump and periplasmic protein was involved in the development of resistance to macrolide in C. jejuni. An eight chip study using total RNA recovered from four separate resistant-type cultures of Erythrocin-resistant Campylobacter jejuni NCTC111168 (R) and four separate cultures of Campylobacter jejuni NCTC111168 (S). Each chip measures the expression level of 1634 genes from Campylobacter jejuni NCTC11168.

2013-08-13 | E-GEOD-49257 | biostudies-arrayexpress

Investigation of RNA 5' ends in Campylobacter jejuni wildtype and an RNase III mutant strain

Project description:differential RNA sequencing (dRNA-seq) (Sharma et al., 2010; Dugar et al., 2013) was used to differentially map 5' ends in Campylobacter jejuni NCTC11168 wildtype and RNase III (rnc, Cj1635c) deletion.

2024-05-16 | GSE230836 | GEO

Transcriptomic changes of Campylobacter jejuni subsp. jejuni strain 81-176 in water

Project description:Campylobacter jejuni is the leading cause of campylobacteriosis in the developed world. Although most cases are caused by consumption of contaminated meat, a significant proportion is caused by consumption of contaminated water. Some C. jejuni isolates are better than others at surviving in water, which suggests that these strains are better adapted to transmission by water than others. The aim of this study is to investigate this phenomenon further. CFU counts and viability assays showed that strain 81116 survives better than strain 81-176 in a defined freshwater medium at 4°C. Comparative transcriptomic profiling using microarray revealed that these strains respond differently to water. This series presents the transcriptome of strain 81-176 in water.

2017-09-01 | GSE94929 | GEO

The role of the Cj0440c gene in Campylobacter jejuni

Project description:Cj0440c encodes a putative transcriptional regulator. To determine the role of Cj0440c in C.jejuni, we knocked out Cj0440c in the wild-type strain (S) to obtain the Cj0440c mutants (SM). Then we compared the transcriptome of the Cj0440c mutant with that of the parent strain using DNA microarray. These comparisons identified 19 genes that showed aM-bM-^IM-%2-fold change in expression in SM. The differentially expressed genes in SM encode proteins involved in flagellar biosynthesis, O-linked glycosylation and hypothetical proteins with unknown fuctions. Cj0440c may regulate flagellar structural element expression or as a compenent of flagellar complex co-expressed with other flagellar genes. Subsequent experiments demonstrated that inactivation of Cj0440c affected corresponding phenotypes of C.jejuni, including broken flagella, weaker motility and reduced colonization ability in chickens. These findings indicate that Cj0440c governs the expression of multiple genes related to flagellar biosynthesis and O-linked glycosylation. This study provides favorable evidence for completing the information of the Campylobacter jejuni genome. An eight chip study using total RNA recoverd from four separate wild-type cultures of Campylobacter jejuni NCTC111168 (S) and four separate cultures of a mutant strain, Campylobacter jejuni NCTC11168 delta- Cj0440c (SM), in which Cj0440c is deleted. Each chip measures the expression level of 1634 genes from Campylobacter jejuni NCTC11168.

2013-08-13 | E-GEOD-49256 | biostudies-arrayexpress

Transcriptomic analysis of Campylobacter jejuni grown in medium containing serine as a main energy source

Project description:Campylobacter jejuni is one of the most important causes of food-borne diseases in industrialized countries. It is known that amino acids are important nutrient source for this pathogen, because C. jejuni lacks enzymes related to glycolysis. However, the characteristics on metabolism of C. jejuni grown in the nutrient restricted medium with a specific amino acid is not fully elucidated. This study shows that C. jejuni NCTC11168 grew well in the nutrient restricted medium containing serine, aspartate, glutamate, and proline. The single subtraction of serine significantly reduced the growth, while three other amino acids did not, suggesting the priority of serine among the four amino acids. In the transcriptomic analysis of C. jejuni NCTC11168 grown in medium with serine as a main energy source. Serine seemed to be sensed by some chemoreceptors and the C. jejuni might reached an adaptation stage with active growth. That is, the expression of flagellar assembly components was downregulated and the biosynthesis of multiple amino acids and nucleotide sugars were upregulated. These data suggest the higher requirement of serine as a nutrient of C. jejuni NCTC11168.

2018-09-17 | GSE119472 | GEO

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