{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,4]],"date-time":"2026-10-04T22:42:18Z","timestamp":1791153738273,"version":"4.1.0"},"reference-count":29,"publisher":"Microbiology Society","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2006,3,1]]},"abstract":"<jats:p>The response of<jats:italic>Staphylococcus aureus<\/jats:italic>to hypochlorous acid (HOCl) exposure was investigated. HOCl challenges were performed on cultures interrupted in the exponential phase. Pretreatment with HOCl conferred resistance to hydrogen peroxide in a PerR-dependent manner. Derepression of the PerR regulon was observed at low HOCl concentration (survival &gt;50\u200a%), using several fusions of different stress promoters to<jats:italic>lacZ<\/jats:italic>reporter genes. At least four members of the PerR regulon (<jats:italic>katA<\/jats:italic>,<jats:italic>mrgA<\/jats:italic>,<jats:italic>bcp<\/jats:italic>and<jats:italic>trxA<\/jats:italic>) encoding proteins with antioxidant properties were strongly induced following exposure to various HOCl concentrations. A striking result was the link between the derepression of the PerR regulon and the decreased superoxide dismutase (SOD) activity following exposure to increased HOCl concentrations. The<jats:italic>sodA<\/jats:italic>mutant was more resistant than the wild-type and also had a higher level of 3-phosphoglycerate dehydrogenase (a measure of PerR regulon activity) without exposure to HOCl. Together, these results imply that derepression of PerR by HOCl is dependent on the level of SOD and protects exponentially arrested cells against HOCl stress.<\/jats:p>","DOI":"10.1099\/mic.0.28385-0","type":"journal-article","created":{"date-parts":[[2006,3,2]],"date-time":"2006-03-02T23:59:32Z","timestamp":1141343972000},"page":"855-861","source":"Crossref","is-referenced-by-count":16,"title":["The impairment of superoxide dismutase coordinates the derepression of the PerR regulon in the response of Staphylococcus aureus to HOCl stress"],"prefix":"10.1099","volume":"152","author":[{"given":"Sami","family":"Maalej","sequence":"first","affiliation":[{"name":"Laboratoire de chimie bact\u00e9rienne IBSM, CNRS UPR 9043, 31, chemin Joseph Aiguier, 13402 Marseille Cedex 20, France"},{"name":"Laboratoire de Microbiologie, Facult\u00e9 des Sciences de Sfax, 3018 Sfax, 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