{"database":"ENA","file_versions":[],"scores":null,"additional":{"omics_type":["Genomics"],"center_name":["Ronneau Lab, U1230, Inserm"],"full_dataset_link":["https://www.ebi.ac.uk/ena/browser/view/PRJNA1306529"],"scientific_name":["Salmonella enterica subsp. enterica serovar Typhimurium"],"long_description":["Pathogenic bacteria rely on the stringent response to adapt to hostile environments encountered within the host. However, the mechanisms by which host-induced stress activates this response remain poorly understood. Here, we identify iron-sulfur (Fe-S) cluster damage as a conserved trigger of the stringent response in major Gram-negative pathogens, including Salmonella enterica, Enterobacter cloacae, and Klebsiella pneumoniae. We demonstrate that Fe-S cluster disruption—triggered by oxidative stress or metal imbalance—limits intracellular pools of sulfur-containing and branched-chain amino acids, thereby activating the (p)ppGpp synthetase RelA. We further show that during Fe-S cluster stress, (p)ppGpp plays a dual role: enhancing bacterial fitness and promoting virulence by upregulating the Salmonella SPI-2 type III secretion system. These findings reveal a conserved mechanism by which pathogenic bacteria integrate host-associated stresses into an adaptive transcriptional response that promotes fitness and virulence, highlighting Fe-S cluster integrity as a central hub for environmental sensing during infection. Overall design: RNA-seq profiling of wild-type salmonella and their relA knockdown derivative with or without the presence of manganese"],"tag":["pathogen:priority","pathogen:bacterium","pathogen"],"classification":["bacteria"],"repository":["ENA"],"additional_accession":[]},"is_claimable":false,"name":"Stress-Induced Iron-Sulfur Cluster Damage as a Conserved Trigger of the Stringent Response","description":"Stress-Induced Iron-Sulfur Cluster Damage as a Conserved Trigger of the Stringent Response","dates":{"last_updated":"2025-09-24","first_public":"2025-09-08"},"accession":"PRJNA1306529","cross_references":{"GEO":["GSE305564"],"taxon":["90371"]}}