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Streptococcus sanguinis

ABSTRACT: Streptococcus sanguinis Transcriptome or Gene expression

PROVIDER: PRJNA564466 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR10091203.fastq.gz	Fastqsanger.gz

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ssa_1972-null mutant of Streptococcus sanguinis SK36

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Project description:Streptococcus sanguinis Transcriptome or Gene expression

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Project description:Transcriptional profiling of ssa_1972-null mutant of Streptococcus sanguinis compared with wild type. The ssa_1972 gene was inactivated in Streptococcus sanguinis SK36 and transcriptional profile was compared with wild type SK36. More information can be found at http://www.people.vcu.edu/~pingxu One-condition experiment, M-NM-^Tssa_1972 vs S. sanguinis SK36 cells. Biological replicates: 3 wild type, 3 M-NM-^Tssa_1972, independently grown and harvested. One replicate (one wild type and one M-NM-^Tssa_1972 mixture) per array.

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Analysis of differential gene expression in the Streptococcus sanguinis comC mutant

Project description:Gene expression profile of the Streptococcus sanguinis comC deletion mutant compared to the wild-type strain SK36

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Analysis of differential gene expression in the Streptococcus sanguinis SSA_0351 mutant

Project description:Gene expression profile of the Streptococcus sanguinis SSA_0351 deletion mutant, ssx_0351, compared to the wild-type strain SK36

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Analysis of differential gene expression in the Streptococcus sanguinis brpL mutant

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Analysis of differential gene expression in the Streptococcus sanguinis brpT mutant

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Analysis of differential gene expression in the Streptococcus sanguinis ciaR mutant

Project description:Gene expression profile of the Streptococcus sanguinis two component system regulator, ciaR, deletion mutant compared to the wild-type strain SK36

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spxA1-null mutant of Streptococcus sanguinis SK36

Project description:Transcriptional profiling of the spxA1-null mutant of Streptococcus sanguinis SK36 compared with wild type. The spxA1 gene was inactivated in Streptococcus sanguinis SK36, and the mutant demonstrated opaque colony morphology, reduced hydrogen peroxide (H2O2) production, and reduced antagonistic activity against Streptococcus S. mutans UA159 both on plates and in liquid media. The mutant also showed decreased tolerance to high temperature, and acidic and oxidative stresses. Complementation of the ΔspxA1 mutant with spxA1 restored colony morphology, H2O2 production and stress tolerance to the ΔspxA1 mutant. The mutant also exhibited an ~5-fold reduction in competitiveness in an animal model of endocarditis, indicating the involvement of SpxA1 in endocarditis virulence. Microarray studies revealed that a number of SpxA1-upregulated genes are involved in oxidative stress. The expression of spxB and nox (which encode pyruvate oxidase and NADH oxidase, respectively, and are involved in H2O2 production and nox involved virulence) significantly decreased in ΔspxA1 compared with the wild type. This may be at least partly responsible for the decreased H2O2 production and reduced virulence in the ΔspxA1 mutant because spxB and nox were involved in H2O2 production and nox involved virulence. One-condition experiment: ΔspxA1 vs. S. sanguinis SK36 cells. Biological replicates: 3 wild type, 3 ΔspxA1, independently grown and harvested. One replicate (one wild type and one ΔspxA1 mixture) per array.

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Project description:Streptococcus sanguinis, a Gram-positive oral commensal, is highly prevalent in the oral cavity and well-characterized for its ability to antagonize oral pathobionts. We have found that production and dissemination of membrane vesicles by S. sanguinis is dependent on environmental and community factors. Co-culture with interacting commensal Corynnyebacterium durum, as well as with the periodontal pathobiont Filifactor alocis had no effect on S. sanguinis vesicle number and size, whereas the periodontal pathobiont Porphyromonas gingivalis abolished S. sanguinis vesicle production. Using both correlation and differential expression analyses to examine the transcriptomic changes underlying vesicle production, we found that differential expression of genes encoding proteins related to the cytoplasmic membrane and peptidoglycan correlate with the abundance of membrane vesicles. Proteomic characterizations of the vesicle cargo identified a variety of proteins, including those predicted to influence host interactions or host immune responses. Cell culture studies of gingival epithelial cells demonstrated that both crude and highly purified membrane vesicles could induce the expression of IL-8, TNF-α, IL-1β, and Gro-α within 6 hours of inoculation at levels comparable to whole cells. OTaken together, our findings suggest that production of membrane vesicles by S. sanguinis is heavily influenced by community and environmental factors, and plays an important role in communication with host cells.

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