{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,9,19]],"date-time":"2023-09-19T00:34:17Z","timestamp":1695083657919},"reference-count":30,"publisher":"American Society for Microbiology","issue":"13","license":[{"start":{"date-parts":[[2008,7,1]],"date-time":"2008-07-01T00:00:00Z","timestamp":1214870400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.asm.org\/non-commercial-tdm-license"}],"content-domain":{"domain":["journals.asm.org"],"crossmark-restriction":true},"short-container-title":["J Bacteriol"],"published-print":{"date-parts":[[2008,7]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n          <jats:p>\n            The small regulatory protein Crl favors association of the stationary-phase sigma factor \u03c3\n            <jats:sup>S<\/jats:sup>\n            (RpoS) with the core enzyme polymerase and thereby increases \u03c3\n            <jats:sup>S<\/jats:sup>\n            activity. Crl has a major physiological impact at low levels of \u03c3\n            <jats:sup>S<\/jats:sup>\n            . Here, we report that the Crl effects on \u03c3\n            <jats:sup>S<\/jats:sup>\n            -dependent gene expression, the H\n            <jats:sub>2<\/jats:sub>\n            O\n            <jats:sub>2<\/jats:sub>\n            resistance of\n            <jats:italic>Salmonella enterica<\/jats:italic>\n            serovar Typhimurium, and the resistance of this organism to acidic pH are greater at 28\u00b0C than at 37\u00b0C. Immunoblot experiments revealed a negative correlation between \u03c3\n            <jats:sup>S<\/jats:sup>\n            and Crl levels; the production of Crl was slightly greater at 28\u00b0C than at 37\u00b0C, whereas the \u03c3\n            <jats:sup>S<\/jats:sup>\n            levels were about twofold lower at 28\u00b0C than at 37\u00b0C. At both temperatures, Crl was present in excess of \u03c3\n            <jats:sup>S<\/jats:sup>\n            , and increasing the Crl level further did not increase the H\n            <jats:sub>2<\/jats:sub>\n            O\n            <jats:sub>2<\/jats:sub>\n            resistance level of\n            <jats:italic>Salmonella<\/jats:italic>\n            and the expression of the \u03c3\n            <jats:sup>S<\/jats:sup>\n            -dependent gene\n            <jats:italic>katE<\/jats:italic>\n            encoding the stationary-phase catalase. In contrast, increasing the \u03c3\n            <jats:sup>S<\/jats:sup>\n            level rendered\n            <jats:italic>Salmonella<\/jats:italic>\n            more resistant to H\n            <jats:sub>2<\/jats:sub>\n            O\n            <jats:sub>2<\/jats:sub>\n            at 28\u00b0C, increased the expression of\n            <jats:italic>katE<\/jats:italic>\n            , and reduced the magnitude of Crl activation. In addition, the effect of Crl on\n            <jats:italic>katE<\/jats:italic>\n            transcription in vitro was not dependent on temperature. These results suggest that the effect of temperature on Crl-dependent regulation of the\n            <jats:italic>katE<\/jats:italic>\n            gene and H\n            <jats:sub>2<\/jats:sub>\n            O\n            <jats:sub>2<\/jats:sub>\n            resistance are mediated mainly via an effect on \u03c3\n            <jats:sup>S<\/jats:sup>\n            levels. In addition, our results revealed that \u03c3\n            <jats:sup>S<\/jats:sup>\n            exerts a negative effect on the production of Crl in stationary phase when the cells contain high levels of \u03c3\n            <jats:sup>S<\/jats:sup>\n            .\n          <\/jats:p>","DOI":"10.1128\/jb.00154-08","type":"journal-article","created":{"date-parts":[[2008,5,4]],"date-time":"2008-05-04T01:46:16Z","timestamp":1209865576000},"page":"4453-4459","update-policy":"http:\/\/dx.doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":12,"title":["Effect of Growth Temperature on Crl-Dependent Regulation of \u03c3\n            <sup>S<\/sup>\n            Activity in\n            <i>Salmonella enterica<\/i>\n            Serovar Typhimurium"],"prefix":"10.1128","volume":"190","author":[{"given":"Ve\u0301ronique","family":"Robbe-Saule","sequence":"first","affiliation":[{"name":"Unite\u0301 de Ge\u0301ne\u0301tique mole\u0301culaire and CNRS URA2172, Institut Pasteur, Paris, France"}]},{"given":"Ingrid","family":"Carreira","sequence":"additional","affiliation":[{"name":"Unite\u0301 de Ge\u0301ne\u0301tique mole\u0301culaire and CNRS URA2172, Institut Pasteur, Paris, France"}]},{"given":"Annie","family":"Kolb","sequence":"additional","affiliation":[{"name":"Unite\u0301 de Ge\u0301ne\u0301tique mole\u0301culaire and CNRS URA2172, Institut Pasteur, Paris, France"}]},{"given":"Franc\u0327oise","family":"Norel","sequence":"additional","affiliation":[{"name":"Unite\u0301 de Ge\u0301ne\u0301tique mole\u0301culaire and CNRS URA2172, Institut Pasteur, Paris, France"}]}],"member":"235","reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"crossref","first-page":"19540","DOI":"10.1074\/jbc.M314145200","volume":"279","year":"2004","unstructured":"Bougdour, A., C. 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