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Staphylococcus aureus ST239 diversity

ABSTRACT: Staphylococcus aureus ST239 diversity

PROVIDER: PRJEB2076 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	ERR023498_1.fastq.gz	Fastqsanger.gz
	ERR023498_2.fastq.gz	Fastqsanger.gz
	ERR023499_1.fastq.gz	Fastqsanger.gz
	ERR023499_2.fastq.gz	Fastqsanger.gz

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Staphylococcus aureus ST239 diversity (Turkey)

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Next Generation Sequencing Facilitates Quantitative Analysis of S. aureus subsp. aureus ST398 and ST239 transcriptomes

Project description:Purpose: Next-generation sequencing (NGS) has revolutionized systems-based analysis of cellular pathways. The goal of this study is to investigate the significantly different pathways and genes between ST398 and ST239. Methods: mRNA profiles of ST398 and ST239 at mid-logarithmic growth phase (4h) were generated by deep sequencing, respectively in quadruplicate and duplicate samples, using the Hiseq2000 (Illumina, CA) sequencer. The four samples of ST398 are J-92 (Sample1), W-604 (Sample2), R-1025 (Sample3) and R-1089 (Sample4) and grouped to G1, while the two samples of ST239 are J-95 (Sample5) and J-99 (Sample6) and grouped to G2. The sequence reads of ST398 and ST239 that passed quality filters were respectively aligned to S. aureus subsp. aureus ST398 (RefSeq accession number AM990992) and S. aureus subsp. aureus TW20 (RefSeq accession number NC _017331) using the Burrows-Wheeler Alignment tool (BWA) followed by ANOVA (ANOVA). Only the consistent data between the four ST398 samples and two ST239 samples were reserved for further analysis. qRT–PCR validation was performed using SYBR Green assays. Results: Using an optimized data analysis workflow, RNA-seq analyses revealed four types of significantly differentially expressed genes between ST398 and ST239 (G1 only, G2 only, G1/G2>2, G2/G1>2), and only the type of G1/G2>2 was included in this study. The type of G1/G2>2 included 164 genes in total, in which there are 14 top genes showing G1/G2>5 including essB gene. Conclusions: Our data provide new information to the signicantly different genes between ST239 and ST398, especially the highly expressed genes in ST398 compared to ST239 which might be closely related to the high virulence of ST398.

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Project description:Coordinated protein-coding sequence transcriptional responses of Staphylococcus aureus to antimicrobial exposure are well described but little is known of the role of bacterial non-coding, small RNAs (sRNAs) in these responses. Here we used RNAseq to investigate the sRNA response of the epidemic multiresistant hospital ST239 S. Aureus strain JKD6009 and its vancomycin-intermediate clinical derivative, JKD6008, after exposure to four antibiotics representing the major classes of antimicrobials used to treat methicillin-resistant S. Aureus infections. These agents included vancomycin, linezolid, ceftobiprole, and tigecycline. We identified 410 potential sRNAs (sRNAs) and then compared global sRNA and mRNA expression profiles at 2 and 6 hours, without antibiotic exposure, and after exposure to 0.5 x MIC for each antibiotic, for both JKD6009 (VSSA), and JKD6008 (VISA).

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