{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T05:42:25Z","timestamp":1792647745426,"version":"4.5.0"},"reference-count":61,"publisher":"American Society for Microbiology","issue":"5","license":[{"start":{"date-parts":[[2025,5,7]],"date-time":"2025-05-07T00:00:00Z","timestamp":1746576000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2025,5,7]],"date-time":"2025-05-07T00:00:00Z","timestamp":1746576000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.asm.org\/non-commercial-tdm-license"}],"funder":[{"DOI":"10.13039\/501100001665","name":"Agence Nationale de la Recherche","doi-asserted-by":"publisher","award":["ANR-19-CE12-0006"],"award-info":[{"award-number":["ANR-19-CE12-0006"]}],"id":[{"id":"10.13039\/501100001665","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["journals.asm.org"],"crossmark-restriction":true},"short-container-title":["Antimicrob Agents Chemother"],"published-print":{"date-parts":[[2025,5,7]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title\/>\n                    <jats:p>\n                      <jats:italic toggle=\"yes\">Staphylococcus aureus<\/jats:italic>\n                      is an opportunistic pathogen that poses a considerable burden to healthcare settings worldwide, aided by its ability to thrive in different environmental growth conditions and survive exposure to antibiotics. Small regulatory RNAs (sRNAs) are decisive in enhancing bacterial fitness by modulating gene expression in response to changing environmental conditions. We investigated the role of sRNAs in the adaptation of\n                      <jats:italic toggle=\"yes\">S. aureus<\/jats:italic>\n                      to antibiotics. By assessing the fitness of a library of sRNA mutants, we identified that RsaA sRNA is required for optimal bacterial growth when exposed to low concentrations of fluoroquinolone, a class of antibiotics targeting DNA replication. We also found that in the absence of RsaA,\n                      <jats:italic toggle=\"yes\">S. aureus<\/jats:italic>\n                      is less susceptible to \u03b2-lactam antibiotics, which act on the cell wall. RsaA has been reported to prevent the expression of MgrA, a master regulatory protein controlling the expression of efflux pumps. Here, we show that RsaA affects the sensitivity of\n                      <jats:italic toggle=\"yes\">S. aureus<\/jats:italic>\n                      to fluoroquinolone and \u03b2-lactam antibiotics through MgrA. RsaA has two forms, a short one commonly referred to in RsaA studies, and a long form about twice the length, of which less is known. Interestingly, our phenotype was only restored when complemented with the long form of the gene or when it was supplied in two parts, the short form and the missing part to obtain the long form. This work demonstrates the role of regulatory RNAs in the adaptation of\n                      <jats:italic toggle=\"yes\">S. aureus<\/jats:italic>\n                      to antibiotic resistance and highlights their value as potential therapeutic targets for manipulating individual sRNA responses to promote the efficacy of existing antibiotics.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1128\/aac.01176-24","type":"journal-article","created":{"date-parts":[[2025,4,4]],"date-time":"2025-04-04T08:34:42Z","timestamp":1743755682000},"update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":9,"title":["A small regulatory RNA controls antibiotic adaptation in\n                    <i>Staphylococcus aureus<\/i>\n                    by modulating efflux pump expression"],"prefix":"10.1128","volume":"69","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7494-3245","authenticated-orcid":false,"given":"Kam Pou","family":"Ha","sequence":"first","affiliation":[{"name":"Universit\u00e9 Paris-Saclay, CEA, CNRS, Institut de Biologie Int\u00e9grative de la Cellule (I2BC)","place":["Gif-sur-Yvette, France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0002-0506-5906","authenticated-orcid":false,"given":"Etornam Kofi","family":"Kumeko","sequence":"additional","affiliation":[{"name":"Universit\u00e9 Paris-Saclay, CEA, CNRS, Institut de Biologie Int\u00e9grative de la Cellule (I2BC)","place":["Gif-sur-Yvette, France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4601-3387","authenticated-orcid":true,"given":"Philippe","family":"Bouloc","sequence":"additional","affiliation":[{"name":"Universit\u00e9 Paris-Saclay, CEA, CNRS, Institut de Biologie Int\u00e9grative de la Cellule (I2BC)","place":["Gif-sur-Yvette, 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