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- W4383551629 endingPage "11157" @default.
- W4383551629 startingPage "11157" @default.
- W4383551629 abstract "Iron is both essential for and potentially toxic to bacteria, so the precise maintenance of iron homeostasis is necessary for their survival. Our previous study indicated that in the human enteropathogen Yersinia enterocolitica, the regulator OmpR directly controls the transcription of the fur, fecA and fepA genes, encoding the ferric uptake repressor and two transporters of ferric siderophores, respectively. This study was undertaken to determine the significance of the RNA chaperone Hfq and the small RNAs OmrA and RyhB1 in the post-transcriptional control of the expression of these OmpR targets. We show that Hfq silences fur, fecA and fepA expression post-transcriptionally and negatively affects the production of FLAG-tagged Fur, FecA and FepA proteins. In addition, we found that the fur gene is under the negative control of the sRNA RyhB1, while fecA and fepA are negatively regulated by the sRNA OmrA. Finally, our data revealed that the role of OmrA results from a complex interplay of transcriptional and post-transcriptional effects in the feedback circuit between the regulator OmpR and the sRNA OmrA. Thus, the expression of fur, fecA and fepA is subject to complex transcriptional and post-transcriptional regulation in order to maintain iron homeostasis in Y. enterocolitica." @default.
- W4383551629 created "2023-07-08" @default.
- W4383551629 creator A5023470937 @default.
- W4383551629 creator A5037666427 @default.
- W4383551629 creator A5043072325 @default.
- W4383551629 creator A5052058213 @default.
- W4383551629 creator A5057808326 @default.
- W4383551629 creator A5079539589 @default.
- W4383551629 creator A5084453033 @default.
- W4383551629 creator A5090047563 @default.
- W4383551629 date "2023-07-06" @default.
- W4383551629 modified "2023-10-14" @default.
- W4383551629 title "Interplay between the RNA Chaperone Hfq, Small RNAs and Transcriptional Regulator OmpR Modulates Iron Homeostasis in the Enteropathogen Yersinia enterocolitica" @default.
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