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Redefining the sRNA transcriptome of Streptococcus pneumoniae serotype 2 strain D39

ABSTRACT: Redefining the sRNA transcriptome of Streptococcus pneumoniae serotype 2 strain D39

PROVIDER: PRJNA508755 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR8286260_1.fastq.gz	Fastqsanger.gz
	SRR8286260_2.fastq.gz	Fastqsanger.gz
	SRR8286255_1.fastq.gz	Fastqsanger.gz
	SRR8286255_2.fastq.gz	Fastqsanger.gz
	SRR8286256_1.fastq.gz	Fastqsanger.gz

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Redefining the sRNA transcriptome of Streptococcus pneumoniae serotype 2 strain D39

Project description:Streptococcus pneumoniae (pneumococcus) is a major human respiratory pathogen and the leading cause of bacterial pneumonia worldwide. Small regulatory RNAs (sRNAs), which often act by post-transcriptionally regulating gene expression, have been shown to be crucial for the virulence of S. pneumoniae and other bacterial pathogens. Over 170 putative sRNAs have been identified in S. pneumoniae TIGR4 strain (serotype 4) through transcriptomic studies, and a subset of these sRNAs have been further implicated in regulating pneumococcal pathogenesis. However, there was little overlap in the sRNAs identified among these studies, which indicated that the approaches used for sRNA identification were not sufficiently sensitive and robust and that there were likely many more undiscovered sRNAs encoded in the S. pneumoniae genome. Here, we sought to comprehensively identify sRNAs in Avery's virulent S. pneumoniae strain D39 using two independent RNA-seq based approaches. We developed an unbiased method for identifying novel sRNAs from bacterial RNA-seq data and have further tested the specificity of our analysis program towards identifying sRNAs encoded by both strains D39 and TIGR4. Interestingly, the genes for 15% of the putative sRNAs identified in strain TIGR4 including ones previously implicated in virulence were not present in strain D39 genome suggesting that the differences in sRNA repertoires between these two serotypes may contribute to their strain-specific virulence properties. Finally, this study has identified 67 new sRNA candidates in strain D39, 28 out of which have been further validated, raising the total number of sRNAs that have been identified in strain D39 to 112.

2019-03-11 | GSE123437 | GEO

Redefining the sRNA transcriptome of Streptococcus pneumoniae serotype 2 strain D39

Project description:Streptococcus pneumoniae (pneumococcus) is a major human respiratory pathogen and a leading cause of bacterial pneumonia worldwide. Small regulatory RNAs (sRNAs), which often act by post-transcriptionally regulating gene expression, have been shown to be crucial for the virulence of S. pneumoniae and other bacterial pathogens. Over 170 putative sRNAs have been identified in S. pneumoniae TIGR4 strain (serotype 4) through transcriptomic studies, and a subset of these sRNAs have been further implicated in regulating pneumococcal pathogenesis. However, there is little overlap in the sRNAs identified among these studies, which indicates that the approaches used for sRNA identification were not sufficiently sensitive and robust and that there are likely many more undiscovered sRNAs encoded in the S. pneumoniae genome. Here, we sought to comprehensively identify sRNAs in Avery's virulent S. pneumoniae strain D39 using two independent RNA-seq based approaches. We developed an unbiased method for identifying novel sRNAs from bacterial RNA-seq data and have further tested the specificity of our analysis program towards identifying sRNAs encoded by both strains D39 and TIGR4. Interestingly, the genes for 15% of the putative sRNAs identified in strain TIGR4 including ones previously implicated in virulence are not present in strain D39 genome suggesting that the differences in sRNA repertoires between these two serotypes may contribute to their strain-specific virulence properties. Finally, this study has identified 67 new sRNA candidates in strain D39, 28 out of which have been further validated, raising the total number of sRNAs that have been identified in strain D39 to 112.

2019-05-13 | GSE124170 | GEO

Redefining the sRNA transcriptome of Streptococcus pneumoniae serotype 2 strain D39

Project description:Redefining the sRNA transcriptome of Streptococcus pneumoniae serotype 2 strain D39

| PRJNA510942 | ENA

Investigation of pneumococcal two-component signal transduction system RR/HK06 in D39

Project description:We wanted to identify genes regulated by the two-component signal transduction system RR/HK06 in Streptococcus pneumoniae. We used microarray in order to discover regulated genes, investigating the effects of the over-expression of RR06 in D39 (serotype 2). Keywords: Gene Regulation

2006-12-23 | GSE5322 | GEO

D39 wild-type vs D39 ΔplcR in GM17 medium

Project description:Comparison of the Streptococcus pneumoniae D39 wild-type vsD39 ΔplcR (SPD1745) in GM17medium

2019-07-31 | GSE133010 | GEO

Impact of naiR delation on the transcriptome of Streptococcus pneumoniae D39

Project description:Transcriptome comparison of the Streptococcus pneumoniae D39 ΔnaiR to D39 wild type grown in CDM

2017-02-24 | GSE94511 | GEO

Global transcription pattern of virulent S. pneumoniae strain D39 (NCTC) compared to that of strains R6 and D39 (Lilly)

Project description:Streptococcus pneumoniae (pneumococcus) is a leading human respiratory pathogen that causes a variety of serious mucosal and invasive diseases. D39 is an historically important serotype 2 strain that was used in experiments by Avery and coworkers to demonstrate that DNA is the genetic material. Although isolated nearly a century ago, D39 remains extremely virulent in murine infection models and is perhaps the strain used most frequently in current studies of pneumococcal pathogenicity. To date, the complete genome sequences have been reported for only two S. pneumoniae strains; TIGR4, a recent serotype 4 clinical isolate, and laboratory strain R6, an avirulent, unencapsulated derivative of strain D39. We report herein the genome sequences of two different isolates of strain D39 and the corrected sequence and updated annotation of strain R6. Comparisons of these three related sequences allowed deduction of the likely sequence of the D39 progenitor and mutations that arose in each isolate. Despite its numerous repeated sequences and IS elements, the serotype 2 genome has remained remarkably stable during cultivation, and one of the D39 isolates contains only 5 relatively minor mutations compared to the deduced D39 progenitor. In contrast, laboratory strain R6 contains 71 single base pair changes, 6 deletions, 4 insertions, and has lost the cryptic pDP1 plasmid compared to the D39 progenitor strain. Many of these mutations are in or affect the expression of genes that play important roles in regulation, metabolism, and virulence. The nature of the mutations that arose spontaneously in these three strains, relative global transcription patterns determined by microarray analyses, and the implications of the D39 genome sequences to studies of pneumococcal physiology and pathogenesis are presented and discussed. Keywords: bacterial strain comparison, bacterial isolate comparison

2006-10-09 | GSE5375 | GEO

Impact of copY delation on the transcriptome of Streptococcus pneumoniae D39

Project description:Transcriptome comparison of the Streptococcus pneumoniae D39 copY-stop mutant to D39 wild-type grown in CDM without added copper.

2011-07-10 | GSE30414 | GEO

Streptococcus pneumoniae D39 wild-type grown in CDM+10 mM arginine compared to D39 wild type grown in CDM + 0.05 mM arginine

Project description:Comparison of Streptococcus pneumoniae D39 wild-type grown in CDM+10 mM arginine compared to D39 wild type grown in CDM + 0.05 mM arginine to define the genome-wide transcriptional response to arginine. Details described in Kloosterman TG and Kuipers OP. ArgR1 and AhrC Mediate Arginine-Dependent Regulation of Arginine Acquisition- and Virulence Genes in the Human Pathogen Streptococcus pneumoniae. JBC 2011

2011-11-02 | GSE33036 | GEO

Impact of adcR delation on the transcriptome of Streptococcus pneumoniae D39 in the presence of Zinc

Project description:Transcriptome comparison of the Streptococcus pneumoniae D39 ΔadcR to D39 wild-type grown in CDM plus 0.2mM Zn2+.

2011-05-13 | GSE29234 | GEO