E-GEOD-35240
Ontology highlight
ABSTRACT:
OTHER RELATED OMICS DATASETS IN: PRJNA152759
PROVIDER: E-GEOD-35240 | ExpressionAtlas | 2015-09-22
REPOSITORIES: ExpressionAtlas
Similar Datasets
Project description:Centrosome defects are a common feature of many cancers. Surprisingly, flies can proceed through the majority of development without centrosomes or with amplified centrosomes in most of their cells. It is unclear whether this is because centrosome defects do not cause many problems in Drosophila cells, or because they can adapt to cope with any problems that arise. Indeed, centrosome loss and centrosome amplification predispose fly brain cells to form tumours. Here we assess how centrosome loss or centrosome amplification perturbs cell physiology by profiling the global transcriptome of Drosophila larval brains and imaginal discs that either lack centrosomes or have too many centrosomes. Mitotic tissues (brains and imaginal discs) were dissected from 3rd instar Drosophila larvae of mutants lacking centrosomes (DSas-4 and DSas-6), a strain with too many centrosomes (SakOE) and two different wild type strains (w67 and OregonR). We extracted RNA from three biological replicates per strain and used it for hybridisation to Affymetrix Drosophila Genome 2.0 arrays. Per biological sample, material dissected from ten larvae was pooled. Gene expression of the mutant strains was compared to both wild type controls.
2012-08-20 | E-GEOD-35240 | biostudies-arrayexpress
Project description:To characterize anaerobic stress-induced expression in adhE mutants, the microarray experiment was performed with two serotypes of wild type E. coli and their adhE mutants: (1) K-12 strain, wild type; (2) B strain, wild type; (3) BW25113, adhE mutants; (4) BL21(DE3), adhE mutants. Under anaerobic growth condition in glucose-containing complex medium, the wild type strains 1 and 2 grew well whereas the mutant strains 3 and 4 experienced anaerobic stress and grew after 24 hours and 48 hours, respectively.
2014-09-26 | GSE46455 | GEO
Project description:RNA-seq was used to compare the responses of Penicillium oxalicum strains to different carbon sources including carbon-starvation, glucose and cellulose. The wild-type strain and transcription facor (ClrB, CreA and AmyR) mutants were studied.
2015-05-28 | GSE69298 | GEO
Project description:Bacteria regulate their cellular resource allocation to enable their fast growth-adaptation to a variety of environmental niches. We studied the ribosomal allocation, growth and expression profile of two sets of fast-growing mutants of Escherichia coli K-12 MG1655. Mutants with 3 copies of the stronger ribosomal RNA operons grew faster than the wild-type strain in minimal media and show similar phenotype to previously studied rpoB mutants. All of them displayed increased ribosomal content, a longer diauxic shift and a reduced activity of the aceBAK operon, indicative of repressed gluconeogenic pathways. Transcriptomic profiles of fast-growing mutants showed common downregulation of hedging functions and upregulated growth functions. Proteome allocation estimations showed an increase in the growth-related proteome for fast-growing strains, but not an increased cellular budget for recombinant protein production. These results show that two different regulatory perturbations (rRNA promoters or rpoB mutations) increasing ribosomal allocation optimize the proteome for growth with a concomitant fitness cost.
2022-02-21 | GSE180830 | GEO
Project description:SpoT is an Rsh (Rel / Spo homolog) protein, which synthesizes the alarmone ppGpp in response to starvation. This experiment is quantifying transcription in two Caulobacter strains after 5 minutes of glucose starvation: one strain is wild-type CB15N (NA1000); the other strain is NA1000 which has a chromosomal in-frame deletion of the spoT gene. The wild-type strain can synthesize the alarmone ppGpp in response to starvation and the spoT null strain cannot. Both strains were cultured in M2 defined medium with glucose as the sole carbon source, and then washed and incubated in M2 medium lacking glucose for 5 minutes before RNA isolation.
2011-05-01 | GSE21206 | GEO
Project description:To understand the biological relevance of the role played by the HHT1 histone H3 variant in C. albicans, we performed a transcriptome analysis of the mutant by global gene expression array analysis. We analyzed gene expression profile of the mutant in strains LR107 and LR108 (hht1∆/hht1∆) and the parent wild type (SC5314) strain grown in YPD liquid medium at 30°C. In the microarray analysis, a total of 1222 genes were found to be expressed significantly different (fold change < 1.5 at p-value < 0.05) between wild type and two hht1 null mutants. Out of the 1222 differentially expressed genes, 670 genes were up-regulated whereas 552 genes were down-regulated. Gene ontology (GO) analysis of up-regulated and down-regulated genes suggests that biofilm, Hap43, transcription, filamentation, white-opaque/mating and invasive growth are the major pathways altered in minor H3 null mutant. Transcription profiling in planktonic YPD condition suggests that minor H3 represses biofilm genes in the planktonic mode of growth. Therefore we performed a genome-wide expression array study after growing the wild type strain and hht1/hht1 mutant strains in Spider induced biofilm condition. This experiment was carried out with two biological replicates of hht1 null mutants. The biofilm induced microarray data revealed that a total of 1010 genes were differentially expressed (at p-value <0.05 and fold change <1.5) between the wild type and hht1 mutants. Out of 1016 differentially expressed genes, 572 genes were up-regulated whereas 444 genes were down-regulated.
2016-09-08 | GSE72824 | GEO
Project description:We analyzed the genome-wide expression profiles of mutant strains of two yeast species in which eight different chromatin regulators and one transcription factor were deleted (one gene deleted in each strain). Comparison of the inter-species expression differences between the wild-types of these species and their mutants showed that deletion of regulators tends to increase the amount of inter-species expression differences, suggestng that the regilators are normally buffering hidden variability. In addition, we measured allele-specific expresion levels of the interspecific hybrid formed by mating each of the two corresponding mutants (deleted for the same regulator). Keywords: Comparative transcriptome analysis
2010-11-01 | GSE23866 | GEO
Project description:We profile gene expression changes in two mutant strains lacking the D. melanogaster HP1 homolog HP1B at the third instar larval stage. Compared to the yw control strain, several hundred genes are deregulated, with metabolic genes being over-represented among the deregulated gene set.
2018-10-05 | GSE120841 | GEO
Project description:Arsenic is an ubiquitous contaminant and a toxic metalloid which presents two main redox states in nature: arsenite [AsIII] and arsenate [AsV]. Arsenic resistance in Synechocystis sp. strain PCC 6803 is mediated by the arsBHC operon and two additional arsenate reductases encoded by the arsI1 and arsI2 genes. Here we describe the genome-wide responses in response to the presence of arsenate and arsenite in wild type and in mutants in the arsenic resistance system. Both forms of arsenic produced similar responses in the wild type strain including induction of several stress related genes and repression of energy generation processes. The responses observed in the arsB mutant strain were similar to the wild type in short term but were maintained in time while they were only transient in the wild type strain. In contrast, the responses observed in a strain lacking all arsenate reductases (the SARS12 strain) were somewhat different and included lower induction of genes involved in metal homeostasis and Fe-S cluster biogenesis. These results suggest that these two processes are targeted by arsenite in the wild type strain. Finally, analysis of the arsR mutant strain revealed that ArsR seems to only control 5 genes in the genome. Furthermore, over-expression of ArsB conferred hypersentivity to nickel, copper and cadmium in an arsR mutant strain. Analysis of genome-wide gene expression patterns in response to arsenic in WT and mutants involved in arsenic detoxification in the cyanobacterium Synechocystis sp PCC 6803. Cells treated with arsenate or arsenite for 1h. Details: WT cells were treated with 1 mM arsenite for 1 h and its expression profile compared to untreated cells (grown in BG11C media). The effects of arsenate were analyzed in the same way but using a modified BG11C media that constains 15% of the normal phosphate concentration (BG11C low phosphate). A reduction in the phosphate concentration in the media is essential to detect grow inhibition after arsenate addition. In the same way that for arsenite cells were treated with 50 mM arsenate for 1 h and their expression profile was compared to untreated cells. Expression profiles of mutant strains lacking arsB gene (SARSB strain; this strain is hypersensitive to arsenite because it lacks the arsenite exporter) or arsR gene (SARSR strain; this strain expresses the arsBHC constitutively) in control conditions and in response to arsenite addition were also analyzed. In addition the expression profiles of a mutant lacking arsenate reductases (SARS12 strain that has interrupted arsC, arsI1 and arsI2 genes; this strain is hypersensitive to arsenate) were analyzed in both control conditions and after addition of 50 mM arsenate.
2014-05-13 | E-GEOD-51383 | biostudies-arrayexpress
Project description:This data set contains samples from Lactobacillus plantarum WCFS1 wild type and its CcpA mutant derivative. Both strains were grown in duplicate (samples L and R) and at four different growth stages samples were taken (early, mid and late log phase, early stationary phase). Samples were compared to each other within one strain and between the two strains. This allows the comparison of the wild type strain to its CcpA derivative in time. Further it allows comparison within one strain during different growth stages.
2010-09-10 | GSE24021 | GEO