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Activity of the Bacillus anthracis 20 kDa protective antigen component

ABSTRACT: Edema factor of anthrax binds to the protective antigen (PA83) which cleaves to PA63 and PA20. The role of PA20 was examined using highthroughput gene expression analysis of human peripheral blood mononuclear cells (PBMC) exposed to PA20. Keywords: Toxicity determination PBMC obtained from different individuals over 6 monthes were incubated with and without rPA20

ORGANISM(S): Homo sapiens

SUBMITTER: Rasha Hammamieh

PROVIDER: E-GEOD-12533 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Activity of the Bacillus anthracis 20 kDa protective antigen component.

Hammamieh Rasha R Ribot Wilson J WJ Abshire Terry G TG Jett Marti M Ezzell John J

BMC infectious diseases 20080922

<h4>Background</h4>Anthrax is caused by Bacillus anthracis that produce two exotoxins, lethal toxin and edema toxin. The lethal toxin is composed of the lethal factor (LF) complexed with the cell binding protective antigen (PA83, 83 kDa). Likewise, the edema factor (EF) binds to the PA83 to form the edema toxin. Once PA83 is bound to the host cell surface, a furin-like protease cleaves the full-length, inactive protein into 63 kDa and 20 kDa antigens (PA63 and PA20). PA63 forms a heptamer and is ...[more]

PMID: 18808698

Similar Datasets

Activity of the Bacillus anthracis 20 kDa protective antigen component

Project description:Edema factor of anthrax binds to the protective antigen (PA83) which cleaves to PA63 and PA20. The role of PA20 was examined using highthroughput gene expression analysis of human peripheral blood mononuclear cells (PBMC) exposed to PA20. Keywords: Toxicity determination

2008-08-26 | GSE12533 | GEO

Transcription profiling of mouse bone marrow derived macrophages (BMDM) treated with anthrax edema toxin (ET)

Project description:Bacillus anthracis, the causative agent of anthrax, secretes three toxin proteins: protective antigen (PA), lethal factor (LF), and edema factor (EF). PA is a transporter of LF and EF into host cells by receptor-mediated endocytosis. LF is a metalloprotease that cleaves mitogen-activated protein kinase (MAPK) kinases (MKK), while EF is an adenylate cyclase, which converts ATP to cAMP. We used microarrays to decipher the specific gene regulation in edema toxin (ET), the complex of EF and PA, treated mouse bone marrow derived macrophages. Experiment Overall Design: BMDM were treated with 1 mg/ml of ET and the RNAs were purified at 0, 2, and 4h after toxin treatment.

2008-06-16 | E-GEOD-9184 | biostudies-arrayexpress

Expression profile from anthrax edema toxin (ET) treated murine bone marrow derived macrophages (BMDM)

2007-09-28 | GSE9184 | GEO

Edema Toxin-treated Macrophage Study

2006-10-24 | GSE4712 | GEO

Anthrax toxins regulate pain signaling and can deliver molecular cargoes to Antxr2+ DRG sensory neurons

Project description:We found that intrathecal injection of anthrax edema toxin (ET), causes analgesia in adult B6J mice. In order to determine if DRG neuron transcriptional responses play a role in pain blockade, we performed a bulk RNA-seq experiment on dissected mouse DRG neurons. We report that anthrax edema toxin causes transcriptional responses in DRG neurons 2h after in vivo administration

2021-09-29 | GSE184619 | GEO

Transcription profiling of murine macrophage-like RAW 264.7 cells treated with EdTx, protective antigen, or LPS for different length of time to examine the effect of EdTx on global transcriptional profiles.

Project description:Edema toxin (EdTx), which is a combination of edema factor and a binding moiety (protective antigen), is produced by Bacillus anthracis, the etiological agent of anthrax. EdTx is an adenylyl cyclase enzyme that converts adenosine triphosphate to adenosine-3',5'-monophosphate, resulting in interstitial edema seen in anthrax patients. We used GeneChip analysis to examine global transcriptional profiles of EdTx-treated RAW 264.7 murine macrophage-like cells at 3 and 6 hr. Experiment Overall Design: RAW 264.7 cells were treated with EdTx (2.5 µg/ml of protective antigen and 0.625 µg/ml of Edema factor), PA (2.5 µg/ml), or LPS (1 ng/mL) for 0, 3, and 6 hr. Each experiment was performed in triplicate, generating a total of 21 arrays (biological replciates).

2007-11-22 | E-GEOD-4712 | biostudies-arrayexpress

Bacillus anthracis' lethal toxin induces broad transcriptional responses in human peripheral monocyte.

Project description:Anthrax lethal toxin directly targets human peripheral monocytes and causes multiple aberrant gene responses that would be expected to result in defects in human monocyte’s normal signaling transduction pathways and nction. This study provides further insights into the mechanisms associated with the host immune system collapse during an anthrax infection, and suggests that anthrax LT may have additional targets outside the well-known MAPK pathway.

2012-12-12 | GSE34407 | GEO

Laboratory adaptation of Bacillus anthracis

Project description:The spore forming pathogen Bacillus anthracis is the etiologic agent of anthrax in humans and animals. It cycles through infected hosts as vegetative cells and is eventually introduced into the environment where it generates an endospore resistant to many harsh conditions. The endospores are subsequently ingested by the next host to begin the next cycle. Outbreaks of anthrax occur regularly worldwide in wildlife and livestock, and the potential for human infection exists whenever humans encounter infected animals. It is also possible to encounter intentional releases of anthrax spores, as was the case in October 2001. Consequently, it is important to be able to rapidly establish the provenance of infectious strains of B. anthracis. Here, we compare protein expression in seven low-passage wild isolates and four laboratory strains of B. anthracis grown under identical conditions using LC-MS/MS proteomic analysis. Of the 1,023 total identified proteins, 96 had significant abundance differences between wild and laboratory strains. Of those, 28 proteins directly related to sporulation were upregulated in wild isolates, with expression driven by Spo0A, CodY, and AbrB/ScoC. In addition, we observed evidence of changes in cell division and fatty acid biosynthesis between the two classes of strains, despite being grown under identical experimental conditions. These results suggest wild B. anthracis cells are more highly tuned to sporulate than their laboratory cousins, and this difference should be exploited as a method to differentiate between laboratory adapted cultures and low passage wild strains isolated during an anthrax outbreak. This knowledge should distinguish between intentional releases and exposure to strains in nature providing a basis for the type of response by public health officials and investigators.

2018-12-04 | PXD010120 | Pride

Bacillus anthracis

Project description:Causes anthrax

| PRJNA12333 | ENA

Expression data from edema toxin treated primary hepatocytes from 1–3-day-old neonatal A/J mice

Project description:The activity of known anthrax toxins is insufficient to account the effects on functions of hepatocytes. In vivo and in vitro studies showed that Anthrax edema toxin (EdTx) induce lethal liver and heart damage We used microarrays to detail the global programme of gene expression underlying cellularisation and identified distinct classes of up-regulated and down-regulated genes during this process.

2018-06-16 | GSE115844 | GEO

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