Nitrosative stress response in uropathogenic Escherichia coli (UPEC)
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ABSTRACT: A strain of UPEC CFT073 lacking the three known NO detoxifiaction mechanisms, Hmp, FlRd and Nrf is used to study the global effect of NO on the pathogen Cultures were anaerobically grown in triplicates under two conditions: Without nitrosative stress or with nitrosative stress, induced by anaerobic growth on nitrate. RNA was extracted from the samples and following rRNA depletion, samples were analyzed by RNA-seq for genome wide transcriptional differences.
Project description:A strain of UPEC CFT073 lacking the three known NO detoxifiaction mechanisms, Hmp, FlRd and Nrf is used to study the global effect of NO on the pathogen
Project description:To gain comprehensive knowledge on role of Lmo0946 in physiology of L. monocytogenes, we set on analyzing whole-transcriptome changes induced by inactivation of lmo0946 gene. Remarkably, we identified for the first time a global effect of lmo0946 inactivation on transcriptome of L. monocytogenes with highly induced genes belonging to SOS regulon in absence of any environmental stress.
Project description:To elucidate whole-transcriptome changes in stationary-phase of growth of L. monocytogenes induced by inactivation of lmo0946 gene, we performed transcriptome comparison of wild-type and its derivative mutant in lmo0946 gene. The analysis revealed very high abundance of two non-coding RNAs, namely Rli47 (sRNA) and SsrA (tmRNA) in both studied strains.
Project description:A biochemical explanation of development from the fertilized egg to the adult anatomy requires an understanding of the complement of proteins and RNAs expressed over time during embryogenesis. Here we present a comprehensive characterization of protein and mRNA dynamics across early development in Xenopus. Surprisingly, we find that most proteins change very little and duplicated genes are expressed similarly. While the correlation between mRNA levels and protein expression is poor, a mass action kinetics model parametrized by the protein synthesis and degradation rates regresses protein dynamics to RNA dynamics, corrected for initial protein concentration. This study provides a rich resource for developmental biologists, unveiling detailed data for absolute levels of ~10K proteins and ~28K transcripts via convenient web portal. It underscores the lasting impact of maternal dowry, finds surprisingly few cases where degradation alone drives a change in protein level, and highlights the importance of transcription in shaping the proteome. mRNA from 18 samples each at a different developmental stage. Libraries were constructed using RNA enriched for mRNA by rRNA depletion using the EpiCenter RiboZero kit and the EpiCenter ScripSeq kit V2 using 50ng input RNA, and 12 cycles amplification.
Project description:Comparaison of the transcriptional profile of mutant of the lpp0148 gene and the parent strain Legionella pneumophila strain Paris. lpp0148 codes for a protein with a ProQ domain (PFAM PF04352). A mutant of this gene was obtained by inserting a premature stop codon in the lpp0148 ORF. The lpp0148 mutant is constitutively competent for natural transformation as described here http://www.ncbi.nlm.nih.gov/pubmed/26526572. Transcriptional profiling was done on cultures grown to exponential phase (OD=0.8). Three independent biological replicates were analysed.
Project description:We investigated a novel, simple approach to induce the production of cryptic secondary metabolites in actinomycetes by stimulating the organism with high-intensity monochromatic green light (180 radiation unit). Streptomyces coelicolor A3(2) produces blue antibiotic actinorhodin (ACT) and red antibiotic undecylprodigiosin (RED). Using these two pigment antibiotics as indicators, we found that sporulation acceleration and regulation of the antibiotic production pathways can be induced by using high-intensity monochromatic green LEDs. Therefore, we investigated the immediate response of S. coelicolor A3(2) gene expression to the strong green LED stimulation.
Project description:Colorectal cancer is the third most common and the second deadliest tumour type in both sexes world-wide. To understand the functional and prognostic impact of cancer-causing somatic mutations, we analysed the whole genomes and transcriptomes of 1,063 primary colorectal cancers in a population-based cohort with long-term follow-up. High quality transcriptome sequences from 1,063 tumours and 120 tissue normals enabled integration analyses of gene mutations and gene expression levels.
Project description:Transcriptome data from individual lck:GFP expressing cells isolated from spleens of two adult Zebrafish. LCK is a marker of lymphocytes and here we identified two major subpopulations corresponding to T-cells and NK-like and a minor one of myeloid-like cells. Single cell transcriptomes are matched with FACS index sorting data (GFP, forward and side light scatter and dead cell staining)
Project description:Comparaison of the transcriptional profile of mutant of the lpp1663 gene and the parent strain Legionella pneumophila strain Paris. lpp1663 codes for a protein with a ProQ domain (PFAM PF04352). A mutant of this gene was obtained by deleting the lpp1663 ORF and replacing it with a gene confering resistance to kanamycin. Transcriptional profiling was done on cultures grown to exponential phase (OD=0.8). Three independent biological replicates were analysed.
Project description:This RNA-Seq study of gene expression in M. tuberculosis was done as part of the FLUTE project (NIH grant U19-AI107774, Eric Rubin, program director). There are 3 replicates each for Mtb H37Rv grown under the following conditions: 0.1% butyrate, 0.4% glucose, butyrate+glucose, low iron, acidic conditions, and several RIF-resistant mutants of Beijing strain HN878 with different mutations in RpoB.