Project description:We perform RNA-seq comparing a treatment with 0.375 mM Kaempferol to a mock treatment (DMSO) in A. baumannii AB5075 in order to describe the alterations in global transcription produced by this phytochemical. A. baumannii AB5075 cultures were grown in LB medium in the presence of 0.375 mM Kaempferol or a DMSO control (3 biological replicates per condition) until reaching mid-exponential phase. At this point, cells were harvested, treated with RNAlater for preservation of total RNA and stored at -80 C. After that, total RNA was extracted from each sample. As a result, 99 genes appeared upregulated in the presence of Kaempferol whereas 18 were downregulated. In highlights, the gene functional groups showing the strongest transcriptional alterations were those related to iron acquisition, siderophore biosynthesis and iron transport genes.

2023-09-20 | GSE212989 | GEO

Towards the complete small RNome of Acinetobacter baumannii

Project description:In recent years, the Gram-negative bacterium Acinetobacter baumannii has garnered considerable attention for its unprecedented capacity to rapidly develop resistance to antibacterial therapeutics. This is coupled with the seemingly epidemic emergence of new hyper-virulent strains. Although strain-specific differences for A. baumannii isolates have been well described, these studies have primarily focused on proteinaceous factors. At present, only limited publications have investigated the presence and role of small regulatory RNA (sRNA) transcripts. Herein, we perform such an analysis, describing the RNA-seq-based identification of 78 A. baumannii sRNAs in the AB5075 background. Together with six previously identified elements, we include each of these in a new genome annotation file, which will serve as a tool to investigate regulatory events in this organism. Our work reveals that the sRNAs display high expression, accounting for >50 % of the 20 most strongly expressed genes. Through conservation analysis we identified six classes of similar sRNAs, with one found to be particularly abundant and homologous to regulatory, C4 antisense RNAs found in bacteriophages. These elements appear to be processed from larger transcripts in an analogous manner to the phage C4 molecule and are putatively controlled by two further sRNAs that are strongly antisense to them. Collectively, this study offers a detailed view of the sRNA content of A. baumannii, exposing sequence and structural conservation amongst these elements, and provides novel insight into the potential evolution, and role, of these understudied regulatory molecules. This study is based on the annotation of novel sRNAs on basis of an Acinetobacter baumannii RNA sequencing dataset. Each sample was generated by pooling three independent biological replicate RNA preps

2016-03-30 | E-GEOD-75708 | biostudies-arrayexpress

Transcriptomic analysis of Acinetobacter baumannii biofilm

Project description:Differential expression of A. baumannii strain AB5075 biofilm compared to planktonic counterparts after 24 h of growth.

2021-05-12 | GSE164233 | GEO

Alteration of global transcription by the artificial sweetener acesulfame K in Acinetobacter baumannii AB5075

Project description:We perform RNA-seq comparing a treatment with 1.33% acesulfame K to a mock treatment in A. baumannii AB5075 in order to describe the alterations in global transcription produced by this artificial sweetener. A. baumannii AB5075 cultures were grown in LB medium in the presence of 1.33% acesulfame K or a water control (3 biological replicates per condition) until reaching mid-exponential phase. At this point, cells were harvested, treated with RNAlate for preservation of total RNA and stored at -80 C. After that, total RNA was extracted from each sample. As a result, 212 genes appeared upregulated in the presence of acesulfame K, whereas 252 were downregulated. In highlights, the gene functional groups showing the strongest transcriptional alterations were those related to twtching motility and natural transformation (downregulation of genes involves in biogenesis and control of Type IV pili and com genes), as well as genes involved in iron acquisition and siderophore biosynthesis and an uncharacterised gene cluster that might be involved in detoxification of sulfonamide compounds.

2022-10-27 | GSE199706 | GEO

Transcription profiling of Acinetobacter baumannii multi-drug resistant strain and a susceptible reference strain - Abefflux

Project description:Transcriptomic comparison of a multidrug resistant Acinetobacter baumannii strain and a susceptible reference strain.

2009-11-20 | E-MEXP-2254 | biostudies-arrayexpress

Multi-omics approach to study global changes in a triclosan mutant strain of Acinetobacter baumannii ATCC 17978.

Project description:Acinetobacter baumannii AB042, a triclosan-resistant mutant, was examined for modulated gene expression using whole genome sequencing, transcriptomics, and proteomics in order to understand the mechanism of triclosan-resistance as well as its impact on A. Baumannii.

2016-09-28 | GSE87398 | GEO

Acinetobacter baumannii strain:AB5075-UW

Project description:Acinetobacter baumannii surface survival Tn-seq reads

| PRJNA308505 | ENA