First insights into the pleiotropic role of vrf (yedF), a newly characterized gene of Salmonella Typhimurium
| Autor: | Antonia Odena-Caballol, Anna Fàbrega, Eliandre de Oliveira, Jordi Vila, Dietmar Fernández-Orth, Clara Ballesté-Delpierre, Ramón Díaz-Peña, Mario Ferrer-Navarro |
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| Přispěvatelé: | Universitat de Barcelona |
| Rok vydání: | 2017 |
| Předmět: |
Salmonella typhimurium
0301 basic medicine Etiology Virulence Factors 030106 microbiology Mutant lcsh:Medicine Motility Virulence Biology Virulència (Microbiologia) Article Virulence (Microbiology) 03 medical and health sciences Enterobacteriaceae Bacterial Proteins Salmonel·la Salmonella Drug Resistance Multiple Bacterial Humans lcsh:Science Psychological repression Gene Multidisciplinary lcsh:R Chemotaxis Phenotype Enterobacteriàcies Cell biology Membrane protein Etiologia lcsh:Q HeLa Cells Transcription Factors |
| Zdroj: | Dipòsit Digital de Documents de la UAB Universitat Autònoma de Barcelona Scientific Reports Recercat. Dipósit de la Recerca de Catalunya instname Dipòsit Digital de la UB Universidad de Barcelona Scientific Reports, Vol 7, Iss 1, Pp 1-11 (2017) |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/s41598-017-15369-7 |
| Popis: | Salmonella possesses virulence determinants that allow replication under extreme conditions and invasion of host cells, causing disease. Here, we examined four putative genes predicted to encode membrane proteins (ydiY, ybdJ, STM1441 and ynaJ) and a putative transcriptional factor (yedF). These genes were identified in a previous study of a S. Typhimurium clinical isolate and its multidrug-resistant counterpart. For STM1441 and yedF a reduced ability to interact with HeLa cells was observed in the knock-out mutants, but an increase in this ability was absent when these genes were overexpressed, except for yedF which phenotype was rescued when yedF was restored. In the absence of yedF, decreased expression was seen for: i) virulence-related genes involved in motility, chemotaxis, attachment and survival inside the host cell; ii) global regulators of the invasion process (hilA, hilC and hilD); and iii) factors involved in LPS biosynthesis. In contrast, an increased expression was observed for anaerobic metabolism genes. We propose yedF is involved in the regulation of Salmonella pathogenesis and contributes to the activation of the virulence machinery. Moreover, we propose that, when oxygen is available, yedF contributes sustained repression of the anaerobic pathway. Therefore, we recommend this gene be named vrf, for virulence-related factor. |
| Databáze: | OpenAIRE |
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