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ppGpp, the general ...
ppGpp, the general stress response alarmone, is required for the expression of the α-Hemolysin toxin in the uropathogenic Escherichia coli isolate, J96
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- Fernández-Vázquez, Jorge (författare)
- Department of Genetics, Microbiology and Statistics, School of Biology, University of Barcelona, Barcelona, Spain
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- Cabrer-Panes, Juan David (författare)
- Department of Genetics, Microbiology and Statistics, School of Biology, University of Barcelona, Barcelona, Spain
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- Åberg, Anna (författare)
- Umeå universitet,Institutionen för medicinsk kemi och biofysik
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- Juárez, Antonio (författare)
- Department of Genetics, Microbiology and Statistics, School of Biology, University of Barcelona, Barcelona, Spain; Institute for Bioengineering of Catalonia, The Barcelona Institute of Science and Technology, Barcelona, Spain
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- Madrid, Cristina (författare)
- Department of Genetics, Microbiology and Statistics, School of Biology, University of Barcelona, Barcelona, Spain
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- Gaviria-Cantin, Tania (författare)
- Department of Genetics, Microbiology and Statistics, School of Biology, University of Barcelona, Barcelona, Spain
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- Fernández-Coll, Llorenç (författare)
- Department of Genetics, Microbiology and Statistics, School of Biology, University of Barcelona, Barcelona, Spain
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- Vargas-Sinisterra, Andrés Felipe (författare)
- Department of Genetics, Microbiology and Statistics, School of Biology, University of Barcelona, Barcelona, Spain
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- Jiménez, Carlos Jonay (författare)
- Department of Genetics, Microbiology and Statistics, School of Biology, University of Barcelona, Barcelona, Spain
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- Balsalobre, Carlos (författare)
- Department of Genetics, Microbiology and Statistics, School of Biology, University of Barcelona, Barcelona, Spain
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(creator_code:org_t)
- 2022-10-14
- 2022
- Engelska.
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Ingår i: International Journal of Molecular Sciences. - : MDPI. - 1661-6596 .- 1422-0067. ; 23:20
- Relaterad länk:
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https://doi.org/10.3...
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https://umu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- ppGpp is an intracellular sensor that, in response to different types of stress, coordinates the rearrangement of the gene expression pattern of bacteria to promote adaptation and survival to new environmental conditions. First described to modulate metabolic adaptive responses, ppGpp modulates the expression of genes belonging to very diverse functional categories. In Escherichia coli, ppGpp regulates the expression of cellular factors that are important during urinary tract infections. Here, we characterize the role of this alarmone in the regulation of the hlyCABDII operon of the UPEC isolate J96, encoding the toxin α-hemolysin that induces cytotoxicity during infection of bladder epithelial cells. ppGpp is required for the expression of the α-hemolysin encoded in hlyCABDII by stimulating its transcriptional expression. Prototrophy suppressor mutations in a ppGpp-deficient strain restore the α-hemolysin expression from this operon to wild-type levels, confirming the requirement of ppGpp for its expression. ppGpp stimulates hlyCABDII expression independently of RpoS, RfaH, Zur, and H-NS. The expression of hlyCABDII is promoted at 37 °C and at low osmolarity. ppGpp is required for the thermoregulation but not for the osmoregulation of the hlyCABDII operon. Studies in both commensal and UPEC isolates demonstrate that no UPEC specific factor is strictly required for the ppGpp-mediated regulation described. Our data further support the role of ppGpp participating in the coordinated regulation of the expression of bacterial factors required during infection.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Mikrobiologi inom det medicinska området (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Microbiology in the medical area (hsv//eng)
Nyckelord
- gene regulation
- ppGpp
- UPEC
- α-hemolysin
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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