Clostridium
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA255517 | ENA |
REPOSITORIES: ENA
Similar Datasets
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Project description:The purpose of this study was to determine the level of genomic content similarity among selected strains of Clostridium botuinum type F strains. In this study, strains were selected that had already been chacaterized by botulinum neurotoxin gene sequencing. Strains harboring bont/F1, bont/F4 and bont/F5 were compared.
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Project description:A strain of Acetivibrio thermocellus (colloquially, Clostridium thermocellum) DSM 1313 capable of growing in xylose was created by both rational engineering and adaptive laboratory evolution (ALE) approaches. This RNA-seq experiment compares the transcriptomes of the pre-ALE strain on native substrate with the pre-ALE and post-ALE strains growing in xylose (or xylose plus xylan). These data show the progression of the initially engineered strain from normal growth with a native substrate, to debilitated growth in the new engeered substrate, to improved growth on the engineered substrate after ALE. Genes of various biological functions are found to undergo coordinated changes at various stages of the engineering & ALE campaign. These correlations shed light on the state of the cell at each stage. All together, these data paint a picture of the strain initially undergoing a stress state, which is eventually overcome through ALE. Many of these changes dissipate in the fast growing strain, leaving only permanent changes that enable growth on xylose.
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Project description:Clostridium difficile is a gram-positive, spore-forming enteric anaerobe which can infect humans and a wide variety of animal species. Recently, the incidence and severity of human C. difficile infection has markedly increased. In this study, we evaluated the genomic content of 73 C. difficile strains isolated from humans, horses, cattle, and pigs by comparative genomic hybridization with microarrays containing coding sequences from C. difficile strains 630 and QCD-32g58. The sequenced genome of C. difficile strain 630 was used as a reference to define a candidate core genome of C. difficile and to explore correlations between host origins and genetic diversity. Approximately 16% of the genes in strain 630 were highly conserved among all strains, representing the core complement of functional genes defining C. difficile. Absent or divergent genes in the tested strains were distributed across the entire C. difficile 630 genome and across all the predicted functional categories. Interestingly, certain genes were conserved among strains from a specific host species, but divergent in isolates with other host origins. This information provides insight into the genomic changes which might contribute to host adaptation. Due to a high degree of divergence among C. difficile strains, a core gene list from this study offers the first step toward the construction of diagnostic arrays for C. difficile.
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Project description:Clostridium difficile is a gram-positive, spore-forming enteric anaerobe which can infect humans and a wide variety of animal species. Recently, the incidence and severity of human C. difficile infection has markedly increased. In this study, we evaluated the genomic content of 73 C. difficile strains isolated from humans, horses, cattle, and pigs by comparative genomic hybridization with microarrays containing coding sequences from C. difficile strains 630 and QCD-32g58. The sequenced genome of C. difficile strain 630 was used as a reference to define a candidate core genome of C. difficile and to explore correlations between host origins and genetic diversity. Approximately 16% of the genes in strain 630 were highly conserved among all strains, representing the core complement of functional genes defining C. difficile. Absent or divergent genes in the tested strains were distributed across the entire C. difficile 630 genome and across all the predicted functional categories. Interestingly, certain genes were conserved among strains from a specific host species, but divergent in isolates with other host origins. This information provides insight into the genomic changes which might contribute to host adaptation. Due to a high degree of divergence among C. difficile strains, a core gene list from this study offers the first step toward the construction of diagnostic arrays for C. difficile.investigated by determining changes in transcript profiles when aerobic steady-state cultures were depleted of air.
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