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A LysR-Type Transcriptional Regulator Controls Multiple Phenotypes in Acinetobacter baumannii

ABSTRACT: A LysR-Type Transcriptional Regulator Controls Multiple Phenotypes in Acinetobacter baumannii

PROVIDER: PRJNA770634 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR16298187.fastq.gz	Fastqsanger.gz
	SRR16298188.fastq.gz	Fastqsanger.gz
	SRR16298189.fastq.gz	Fastqsanger.gz
	SRR16298190.fastq.gz	Fastqsanger.gz
	SRR16298191.fastq.gz	Fastqsanger.gz

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Similar Datasets

A LysR-Type Transcriptional Regulator Controls Multiple Phenotypes in Acinetobacter baumannii

Project description:Acinetobacter baumannii is a multidrug-resistant, Gram-negative nosocomial pathogen that exhibits phenotypic heterogeneity resulting in virulent opaque (VIR-O) and avirulent translucent (AV-T) colony variants. Each variant has a distinct gene expression profile resulting in multiple phenotypic differences. Cells interconvert between the VIR-O and AV-T variants at high frequency under laboratory conditions, suggesting that the genetic mechanism underlying the phenotypic switch could be manipulated to attenuate virulence. Therefore, our group has focused on identifying and characterizing genes that regulate this switch, which led to the investigation of ABUW_1132 (1132), a highly conserved gene predicted to encode a LysR-type transcriptional regulator. ABUW_1132 was shown to be a global regulator as the expression of 74 genes was altered > 2-fold in an 1132 deletion mutant. The 1132 deletion also resulted in a 16-fold decrease in VIR-O to AV-T switching, loss of 3-OH-C12-HSL secretion, and reduced surface-associated motility. Further, the deletion of 1132 in the AV-T background caused elevated capsule production, which increased colony opacity and altered the typical avirulent phenotype of translucent cells. These findings distinguish 1132 as a global regulatory gene and advance our understanding of A. baumannii’s opacity-virulence switch.

2021-10-19 | GSE185730 | GEO

Identification of a novel LysR family transcriptional regulator controlling acquisition of sulfur sources in Acinetobacter baumannii.

Project description:RNA sequencing transcriptomics was performed on a highly multidrug resistant A. baumannii strain belonging to international clone I, AB5075_UW and a transposon insertion inactivated mutant of ABUW_1016 (cbl), which encodes a LysR-type transcriptional regulator.Transcriptomics suggests that Cbl controls expression of the genes involved in acquisition and reduction of various sulfur sources in A. baumannii.

2022-12-15 | GSE183337 | GEO

A LysR-Type Transcriptional Regulator Controls Multiple Phenotypes in <i>Acinetobacter baumannii</i>.

Project description:Acinetobacter baumannii is a multidrug-resistant, Gram-negative nosocomial pathogen that exhibits phenotypic heterogeneity resulting in virulent opaque (VIR-O) and avirulent translucent (AV-T) colony variants. Each variant has a distinct gene expression profile resulting in multiple phenotypic differences. Cells interconvert between the VIR-O and AV-T variants at high frequency under laboratory conditions, suggesting that the genetic mechanism underlying the phenotypic switch could be manipulated to attenuate virulence. Therefore, our group has focused on identifying and characterizing genes that regulate this switch, which led to the investigation of ABUW_1132 (1132), a highly conserved gene predicted to encode a LysR-type transcriptional regulator. ABUW_1132 was shown to be a global regulator as the expression of 74 genes was altered ≥ 2-fold in an 1132 deletion mutant. The 1132 deletion also resulted in a 16-fold decrease in VIR-O to AV-T switching, loss of 3-OH-C12-HSL secretion, and reduced surface-associated motility. Further, the deletion of 1132 in the AV-T background caused elevated capsule production, which increased colony opacity and altered the typical avirulent phenotype of translucent cells. These findings distinguish 1132 as a global regulatory gene and advance our understanding of A. baumannii's opacity-virulence switch.

| S-EPMC8601201 | biostudies-literature

Transcriptomic profiling by RNA-seq of A. baumannii 17978 wild-type, and ∆A1S_1874 mutants.

Project description:Acinetobacter baumannii A1S_1874 gene encodes as a LysR-type transcriptional regulator. LysR family regulators known to regulate biofilm formation, antibiotic resistance, and the expression of diverse genes in other Gram-negative bacteria. However, A1S-1874 has never been characterized in Acinetobacter baumannii, and the studies about the regulon of A1S-1874 are not discovered. In this study we revealed that A1S_1874 differentially regulates at least 302 genes including the csu pilus operon, N-acylhomoserine lactone synthese gene, A1S_0112-A1S_0118 operon, type 1v secretion system related genes that are involved in biofilm formation, surface motility, adherence, quorum sensing and virulence. Overall, our data suggests that A1S-1874 is a key regulator of Acinetobacter baumannii biofilm formation and gene expression.

2021-05-25 | GSE173626 | GEO

Identification of a novel LysR family transcriptional regulator controlling acquisition of sulfur sources in Acinetobacter baumannii.

Project description:Identification of a novel LysR family transcriptional regulator controlling acquisition of sulfur sources in Acinetobacter baumannii.

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A non-classical LysR type transcriptional regulator PA2206 is required for an effective oxidative stress response in Pseudomonas aeruginosa.

Project description:LysR-type transcriptional regulators (LTTRs) are emerging as key circuit components in regulating microbial stress responses and are implicated in modulating oxidative stress in the human opportunistic pathogen Pseudomonas aeruginosa. The oxidative stress response encapsulates several strategies to overcome the deleterious effects of reactive oxygen species. However, many of the regulatory components and associated molecular mechanisms underpinning this key adaptive response remain to be characterised. Comparative analysis of publically available transcriptomic datasets led to the identification of a novel LTTR, PA2206, whose expression was altered in response to a range of host signals in addition to oxidative stress. PA2206 was found to be required for tolerance to H2O2 in vitro and lethality in vivo in the Zebrafish embryo model of infection. Transcriptomic analysis in the presence of H2O2 showed that PA2206 altered the expression of 58 genes, including a large repertoire of oxidative stress and iron responsive genes, independent of the master regulator of oxidative stress, OxyR. Contrary to the classic mechanism of LysR regulation, PA2206 did not autoregulate its own expression and did not influence expression of adjacent or divergently transcribed genes. The PA2214-15 operon was identified as a direct target of PA2206 with truncated promoter fragments revealing binding to the 5M-bM-^@M-^Y-ATTGCCTGGGGTTAT-3M-bM-^@M-^Y LysR box adjacent to the predicted -35 region. PA2206 also interacted with the pvdS promoter suggesting a global dimension to the PA2206 regulon, and suggests PA2206 is an important regulatory component of P. aeruginosa adaptation during oxidative stress. Six samples were analysed in total, three biological replicates of the PA2206 mutant and PA2206 complemented strains. Each biological replicate included three technical replicates.

2013-01-01 | E-GEOD-23367 | biostudies-arrayexpress

CRISPR-Cas immunity is repressed by the LysR-type transcriptional regulator PigU

Project description:CRISPR-Cas immunity is repressed by the LysR-type transcriptional regulator PigU

| PRJNA1020058 | ENA

RNA-Seq of Acinetobacter baumannii ATCC 17978 and a gene knockout strain of putative response regulator gene A1S_2006 from the ATCC 17978 background

Project description:The putative response regulator gene A1S_2006 of Acinetobacter baumannii ATCC 17978 was knocked out using a homologous recombination method to assess the effects of that gene knockout in a global transcriptome landscape. This was done with an objective to better understand the cellular processes that are regulated by the response regulator protein encoded by A1S_2006 gene.

2019-04-04 | E-MTAB-7815 | biostudies-arrayexpress

Identification of a novel LysR-type transcriptional regulator in Staphylococcus aureus that is crucial for secondary tissue colonization during metastatic bloodstream infection

Project description:Purpose: The goal of this study was to identify Staphylococcus aureus genes which are important during establishment of metastatic infections in bloodstream infections. Methods: Pooled mariner transposon mutant libraries were generated as previously described (PMID: 27185949). The libraries were sequenced on the Illumina HiSeq 2500 platform with the transposon-specific oligonucleotide primer Himar1-Seq. Illumina adapter sequences were removed via cutadapt version 1.2.1. The reads were filtered for size (>16 bp) and to contain the signature transposon inverted repeat. Reads were mapped to the Staphylococcus aureus 6850 genome (RefSeq accession NC_022222.1) by Bowtie2 v2.1.0. Identification of depleted and enriched mutants was performed via DESeq2 version 1.6.2. Results: S. aureus genes were identified which were upregulated or downregulated upon iduced expression of the LysR-type transcriptional regulator RSAU_000852 in Staphylococcus aureus 6850. Conclusions: Our study identifies a gene for a LysR-type transcription regulator, which is involved in metabolic adaptation of the pathogen during colonization of secondary infection sites in a bloodstream infection model.

2020-09-08 | GSE139513 | GEO

The LysR-type transcriptional regulator VtlR/LsrB controls expression of multiple small RNA and small protein genes in Agrobacterium tumefaciens

Project description:The LysR-type transcriptional regulator VtlR/LsrB controls expression of multiple small RNA and small protein genes in Agrobacterium tumefaciens

| PRJNA670952 | ENA

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