Similar Datasets
Project description:The transcription level of a rex-deficient S. aureus mutant in comparison to its parental strain S. aureus SH1000 was analyzed using DNA microarrays.
2009-12-31 | GSE17128 | GEO
Project description:ArlRS is a two-component regulatory system in Staphylococcus aureus. Here we use RNA-sequencing to compare gene expression in a wild-type USA300 strain and an isogenic arlRS mutant.
2020-04-29 | GSE130887 | GEO
Project description:MgrA is a global regulator of gene expression in Staphylococcus aureus. Here we use RNA-sequencing to compare gene expression in a wild-type USA300 strain and an isogenic mgrA mutant.
2019-05-07 | GSE130777 | GEO
Project description:The transcription level of a rex-deficient S. aureus mutant in comparison to its parental strain S. aureus SH1000 was analyzed using DNA microarrays. S. aureus N315 microarrays were purchased from Scienion (Scienion AG, Berlin, Germany) and were produced by spotting 2,338 PCR products of the 2,593 ORFs comprising annotated genome of S. aureus N315 [reference identification: NC_002745] on a glass slide. Each ORF is present in duplicate on the microarray (further details can be found at http://www.scienion.com), cDNA was synthesized from total RNA with the LabelStar Array Kit from QIAGEN using the QIAGEN protocol with slight modifications: Random hexamer primer were used (Invitrogen, Karlsruhe, Germany) and Cy3- and Cy5-dCTP were purchased from Perkin-Elmer (Rodgau - Juegesheim, Germany). As recommended by Scienion, 10 µg RNA from either SH1000 or AK1 were used for cDNA synthesis. After hybridisation for 72 h, the microarrays were washed as recommended by the manufacturer. Data analysis. The hybridized microarrays were scanned with a GenePix 4000B microarray scanner (MDS Analytical Technologies GmbH, Ismaning, Germany). A geometric raster was laid over the resulting microarray picture to distinguish the signals from the background. After localization of single spots, intensities and global background were calculated automatically. The hybridization patterns and intensities were quantitatively analyzed using the Imagene 6 software (BioDiscovery, El Segundo, CA). The replicates were averaged, and the spots identified by Imagene 6 (BioDiscovery) as flawed were omitted. The data set was normalized by application of the LOWESS algorithm. In a next step, the intensity values of all arrays for each time point as well as for all time points combined were used for t tests. Genes with a change of <0.5- or â?¥2.0-fold were characterized as having significantly differing amounts of transcripts based on t tests with a P value cut-off of at least 0.05. Gene functions were assigned to the respective accession numbers and annotations as compiled on DOGAN, a web page for S. aureus N315 (http://www.bio.nite.go.jp/dogan/MicroTop?GENOME_ID=n315G1). The parental strain SH1000 and the Rex deficient mutant AK1 were applied on full-genome microarrays to get a detailed view on the differences in the transcriptional profiles which are caused â?? directly or indirectly â?? by the introduced mutation. More specifically, expression levels were compared at five time points, covering different growth phases. To highlight the general changes in the expression profile between SH1000 and the rex mutant, the microarray data of all five time points were also analyzed in a combined way using standard statistical methods. In further experiments, we focused on those genes, which seemed to flag the general difference between the investigated strains.
2010-05-16 | E-GEOD-17128 | biostudies-arrayexpress
Project description:A library of transposon mutants were generated in S.aureus strain SH1000 using a custom Mariner transposon with an outward-facing T7 promoter. Genomic DNA was extracted from the library and digested with an appropriate restriction enzyme (AluI or RsaI). Labelled RNA run-offs were produced from the T7 promoter and hybridised to a tiling microarray to determine the position of the mutant. This was done using a library of a million S. aureus mutants, and genes not disrupted by a transposon were inferred to be essential for replication and growth in vitro.
2009-04-16 | E-MEXP-1588 | biostudies-arrayexpress
Project description:PdeL is a transcription regulator and c-di-GMP specific phosphodiesterase in Escherichia coli. To address the transcription regulator function of PdeL we analyzed the transcriptomes of four E. coli K12 strains during the exponential growth phase by RNA-sequencing. These four strains included (1) wild-type E. coli K12 strain BW30270 carrying an empty vector control plasmid, (2) an isogenic pdeL deletion mutant carrying the control plasmid, as well as the pdeL mutant that was complemented with (3) a plasmid carrying pdeL under control of the IPTG-inducible tac promoter or (4) a plasmid encoding a fusion protein of the PdeL’s DNA-binding domain and the C-terminal dimerization domain of phage Lambda cI repressor (PdeL-DBD_cI-C). Expression of plasmid-encoded pdeL and pdeL-DBD_cI-C, respectively, was induced by addition of IPTG for 15 minutes prior to RNA isolation. Analyses of the RNA-seq data revealed that plasmid-provided PdeL (and PdeL-DBD_cI-C) repress transcription of class II flagellar genes and presumably regulate the transcription of additional loci, while only little differences were observed between the transcriptomes of wild-type strain BW30270 and its isogenic pdeL mutant.
2020-07-31 | GSE136273 | GEO
Project description:MepR is a substrate-responsive repressor of mepR and mepA, which encode itself and a MATE family multidrug efflux pump. Microarray analyses of Staphylococcus aureus SH1000 and its mepR-disrupted derivative revealed changes in expression of many genes in addition to mepR and mepA, notably several involved in virulence Keywords: Staphylococcus aureus, MATE efflux pump, MepR Staphylococcus aureus strains SH1000 wildtype and mepR were grown in duplicate to exponential and post-exponential phase (corresponding to an A550 nm of 0/4 and 2.0 respectively). RNA was harvested, converted to cDNA, labelled with Biotin and used to probe custom-designed Affymetrix antisense S.aureus GeneChips. Eight samples in total were prepared and analyzed.
2010-05-16 | E-GEOD-10033 | biostudies-arrayexpress
Project description:We have studied the transcriptome of S. aureus HG003 strain and HG003 DsarA strain
2021-05-11 | GSE174163 | GEO
Project description:To identify the substrates of YacP (Rae1) by determine which RNAs are affected in a ∆yacP mutant and plasmid complemented strain
2017-03-28 | GSE93894 | GEO
Project description:Methicillin-resistant Staphylococcus aureus (MRSA) is problematic both in hospitals and the community. Currently, we have limited understanding of mechanisms of innate immune evasion used by S. aureus. To that end, we created an isogenic deletion mutant in strain MW2 (USA400) of the saeR/S two-component gene regulatory system and studied its role in mouse models of pathogenesis and during human neutrophil interaction. In this study, we demonstrate saeR/S plays a distinct role in S. aureus pathogenesis and is vital for virulence of MW2 in a mouse model of sepsis. Moreover, deletion of saeR/S significantly impaired survival of MW2 in human blood and after neutrophil phagocytosis. Microarray analysis of genes influenced by saeR/S demonstrated SaeR/S of MW2 influences a wide variety of genes with diverse biological functions. These data shed new insight into how virulence is regulated in S. aureus and associates a specific staphylococcal gene-regulatory system with invasive staphylococcal disease. Wild type control vs mutant at two different growth phases
2010-05-14 | E-GEOD-15067 | biostudies-arrayexpress