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[Haemophilus] ducreyi

ABSTRACT: Transcriptomes of 35000HP, ΔcpxA, ΔcpxR mutant strains of Haemophilus ducreyi in mid-log, transition, and stationary phase

PROVIDER: PRJNA302861 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR2937560.fastq.gz	Fastqsanger.gz
	SRR2937570.fastq.gz	Fastqsanger.gz
	SRR2937580.fastq.gz	Fastqsanger.gz
	SRR2937590.fastq.gz	Fastqsanger.gz
	SRR2937561.fastq.gz	Fastqsanger.gz

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Project description:To better understand the role of H. ducreyi CpxRA in controlling virulence determinants, here we defined genes potentially regulated by CpxRA by using RNA-Seq. Activation of CpxR by deletion of cpxA repressed nearly 70% of its targets, including seven established virulence determinants. Inactivation of CpxR by deletion of cpxR differentially regulated few genes and increased the expression of one virulence determinant. We identified a CpxR binding motif that was enriched in downregulated but not upregulated targets. These data reinforce the hypothesis that CpxA phosphatase activity plays a critical role in controlling H. ducreyi virulence in vivo. Characterization of the downregulated genes may offer new insights into pathogenesis. RNA of Haemophilus ducreyi wildtype, cpxA and cpxR mutants were collected at mid-log, transition, and stationary phases of growth, in quadruplicate.

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Project description:Comparative analysis of the global gene expression of a Haemophilus ducreyi 35000HP cpxA deletion mutant relative to the wild type strain After the cpxA mutant was generated, both strain were grown in Columbia Broth. After 8 hr of growth RNA wa isolated and processed for DNA microarray analysis. This study includes three biological replicates (paired samples), and all three were subjected to dye swap.

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