Acanthamoeba castellanii
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ABSTRACT:
PROVIDER: PRJNA12731 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:STAT (signal transducers and activators of transcription) proteins are one of the important mediators of phosphotyrosine-regulated signaling in metazoan cells. We described the presence of STAT protein in a unicellular, free-living amoebae with a simple life cycle, Acanthamoeba castellanii. A. castellanii is the only, studied to date, Amoebozoan that does not belong to Mycetozoa but possesses STATs. A sequence of the A. castellanii STAT protein includes domains similar to those of the Dictyostelium STAT proteins: a coiled coil (characteristic for Dictyostelium STAT coiled coil), a STAT DNA-binding domain and a Src-homology domain. The search for protein sequences homologous to A. castellanii STAT revealed 17 additional sequences from lower eukaryotes. Interestingly, all of these sequences come from Amoebozoa organisms that belong to either Mycetozoa (slime molds) or Centramoebida. We showed that there are four separated clades within the slime mold STAT proteins. The A. castellanii STAT protein branches next to a group of STATc proteins from Mycetozoa. We also demonstrate that Amoebozoa form a distinct monophyletic lineage within the STAT protein world that is well separated from the other groups.
| S-EPMC4206453 | biostudies-literature
Project description:An EST project has begun for this protist
| PRJNA12783 | ENA
Project description:RNAseq data from Acanthamoeba castellanii
| PRJNA794325 | ENA
Project description:Acanthamoeba castellanii Raw sequence reads
| PRJNA422304 | ENA
Project description:To investigate the interaction of intra-amoebal C. jejuni with the transient host A. castellanii. We then performed gene expression profiling analysis using data obtained from RNA-seq of control and intra-amoebal C. jejuni.
2022-11-02 | GSE206909 | GEO
Project description:The transcriptome of Escherichia coli K-12 has been widely studied over a variety of conditions for the past decade while such studies involving E. coli O157:H7, its pathogenic cousin, are just now being conducted. To better understand the impact of intracellular life within a ruminant and environmental protozoan on E. coli O157:H7, global transcript levels of strain EDL933 cells inside Acanthamoeba were compared to cell grown in the protozoan media (ATCC PYG712) by microarray.
2010-12-01 | GSE16762 | GEO
Project description:1. Chemiluminescence of Acanthomoeba castellanii in the presence of O2 was of similar intensity in organisms harvested early or late during exponential growth [when cyanide (1 mM) stimulates or inhibits respiration respectively]. 2. Cyanide (up to 1.5 mM) stimulated photoemission in both types of organism by 250--300 photons/s per 10(7) cells above the value observed under aerobic conditions. 3. 'Dibromothymoquinone' (2,5-dibromo-6-isopropyl-3-methyl-p-benzoquinone) (up to 80 microM) further increased chemiluminescence. 4. Similar responses were also demonstrated in whole homogenates and in subcellular fractions; 36% of the chemiluminescence was provided by a fraction sedimenting at 100000g-min, and 20% in that fraction that was non-sedimentable at 200000g-min. 5. Mitochondrial substrates (succinate, 2-oxoglutarate, NADH) in the presence or absence of ADP and Pi or peroxisomal substrates (glycollate, urate or ethanol) gave no increases in light emission by whole homogenates or in any of the fractions. 6. It is suggested that reactions responsible for production of chemiluminescence are those primarily producing superoxide anions and leading to lipid peroxidation and singlet-oxygen formation. Photoemission enhancement and superoxide dismutase inhibition showed similar cyanide concentration-dependencies.
| S-EPMC1161685 | biostudies-other
Project description:Virulence of Cryptococcus neoformans for mammals was proposed to emerge from evolutionary pressures on its natural environment by protozoan predators, which selected for strategies that allow survival within macrophages. In fact, Acanthamoeba castellanii ingests yeast cells, which then replicate intracellularly. In addition, most fungal factors needed to establish infection in the mammalian host are also important for survival within the amoeba. To better understand the origin of C. neoformans virulence, we compared the transcriptional profile of yeast cells internalized by amoebae and murine macrophages after 6 h of infection. Our results showed 656 and 293 genes whose expression changed at least two-fold in response to the intracellular environments of amoebae and macrophages, respectively. Among the genes common to both groups, we focused on the ORF CNAG_05662, which was potentially related to sugar transport. We constructed a mutant strain and evaluated its ability to grow on various carbon sources. The results showed that this gene, named PTP1 (Polyol Transporter Protein 1), is involved in the transport of 5- and 6-carbon polyols but its absence had no effect on virulence. Overall, our results are consistent with the hypothesis that mammalian virulence originated from fungal-protozoal interactions and provide a better understanding of how C. neoformans adapts to the mammalian host.
2013-03-14 | GSE45027 | GEO
Project description:Identification of high affinity receptors for mannosylated fungal cell wall residues expressed on the surface of amoebas and macrophages and was determinatedetermined the relative importance of these pathways in the antifungal response,s comparing the phagocytic models.
2022-01-28 | PXD031121 | Pride
Project description:Virulence of Cryptococcus neoformans for mammals was proposed to emerge from evolutionary pressures on its natural environment by protozoan predators, which selected for strategies that allow survival within macrophages. In fact, Acanthamoeba castellanii ingests yeast cells, which then replicate intracellularly. In addition, most fungal factors needed to establish infection in the mammalian host are also important for survival within the amoeba. To better understand the origin of C. neoformans virulence, we compared the transcriptional profile of yeast cells internalized by amoebae and murine macrophages after 6 h of infection. Our results showed 656 and 293 genes whose expression changed at least two-fold in response to the intracellular environments of amoebae and macrophages, respectively. Among the genes common to both groups, we focused on the ORF CNAG_05662, which was potentially related to sugar transport. We constructed a mutant strain and evaluated its ability to grow on various carbon sources. The results showed that this gene, named PTP1 (Polyol Transporter Protein 1), is involved in the transport of 5- and 6-carbon polyols but its absence had no effect on virulence. Overall, our results are consistent with the hypothesis that mammalian virulence originated from fungal-protozoal interactions and provide a better understanding of how C. neoformans adapts to the mammalian host. Four conditions, pairwise-compared: cells in vegetative growth at 28C versus cells within amoebae at 28C; and cells in vegetative growth at 37C/5% CO2 versus cells within macrophages at 37C/5% CO2. Three biological replicates for each condition. One replicate per array.
2013-03-14 | E-GEOD-45027 | biostudies-arrayexpress