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Transcriptomic study of single mutant hns and hns2 from enteroaggregative E. coli 042 by RNA-seq

ABSTRACT: Transcriptomic study of single mutant hns and hns2 from enteroaggregative E. coli 042 by RNA-seq

PROVIDER: PRJNA610318 | ENA |

REPOSITORIES: ENA

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Transcriptomic study of single mutant hns and hns2 from enteroaggregative E. coli 042 by RNA-seq

Project description:Bacterial genomes encode in many instances more than one copy of genes coding for global modulators. The enteroaggregative E. coli strain 042 encodes, in addition to the hns and stpA genes, an additional hns-like gene, hns2. We have previously determined the patterns of the H-NS2 regulation in cells grown at 37ºC by using RNA-seq (see https://doi.org/10.1128/mSystems.00220-17). In this work, we used RNA-seq to compare the transcriptome of the wt strain and its hns and hns2 derivatives grown at 25ºC in LB medium.

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Transcriptomic study of single mutants hns, hns2 and double mutans hhahha2 and hnshns2 from enteroaggregative E. coli 042 by RNA-seq

Project description:Bacterial genomes encode in many instances more than one copy of genes coding for global modulators. In the Enterobacteriaceae, cells express the global modulator H-NS and its paralogue StpA. The enteroaggregative E. coli strain 042 encodes, in addition to the hns and stpA genes, an additional hns gene. We used RNA-seq to compare the transcriptome of the wt strain and its hns, hns2 and double hns hns2 derivatives, as well as of an hha null mutant (hhahha2). It is well known that the Hha protein co-modulates gene expression with H-NS. The results obtained have shown that the main role of H-NS2 is to modulate a subset of H-NS modulated genes, those that also are targeted by Hha, which are mainly HGT genes. When compared with H-NS, H-NS2 also shows a differential expression level and a different regulatory pattern.

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Overexpression of the third H-NS paralogue H-NS2 compensates fitness loss in hns mutants of the enteroaggregative Escherichia coli strain 042.

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