{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T14:52:07Z","timestamp":1791298327746,"version":"4.1.0"},"reference-count":36,"publisher":"American Society for Microbiology","license":[{"start":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T00:00:00Z","timestamp":1791244800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T00:00:00Z","timestamp":1791244800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.asm.org\/non-commercial-tdm-license"}],"funder":[{"DOI":"10.13039\/501100007155","name":"Medical Research Council","doi-asserted-by":"publisher","award":["MR\/W018756\/1"],"award-info":[{"award-number":["MR\/W018756\/1"]}],"id":[{"id":"10.13039\/501100007155","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["journals.asm.org"],"crossmark-restriction":true},"short-container-title":["J Bacteriol"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title\/>\n                    <jats:p>\n                      <jats:italic toggle=\"yes\">Mycobacterium tuberculosis<\/jats:italic>\n                      (Mtb) survives host defenses by adapting to host conditions, including acid stress, during infection. A critical survival strategy involves pH homeostasis, mediated by complex signaling systems that regulate metabolic reprogramming and stress responses. While the lysine acetyltransferase Rv0998 is known to support Mtb hypoxia adaptation and metabolic flexibility, its role in acid stress remains unexplored. Here, we investigated the consequences of\n                      <jats:italic toggle=\"yes\">rv0998<\/jats:italic>\n                      deletion in 7H9 with glucose as the major carbon source. RNA-seq analysis showed that loss of Rv0998 altered the transcriptional response to acidic pH, including changes in the DosR regulon and\n                      <jats:italic toggle=\"yes\">pfkB<\/jats:italic>\n                      \/Rv2029c. Stable isotope tracing with [U-\n                      <jats:sup>13<\/jats:sup>\n                      C\n                      <jats:sub>6<\/jats:sub>\n                      ]-glucose also showed reduced fractional\n                      <jats:sup>13<\/jats:sup>\n                      C labeling across central carbon metabolites in the\n                      <jats:italic toggle=\"yes\">rv0998<\/jats:italic>\n                      mutant, with the largest decrease at acidic pH observed in upper glycolytic and connected hexose-phosphate intermediates. Growth and glucose-labeling phenotypes of\n                      <jats:italic toggle=\"yes\">dosR<\/jats:italic>\n                      and\n                      <jats:italic toggle=\"yes\">pfkB<\/jats:italic>\n                      mutants provided focused examples of stress-responsive and carbon-metabolic processes associated with the broader Rv0998 response. These findings indicate that Rv0998 contributes to coordinated transcriptional and metabolic adaptation of Mtb to acidic pH, and support further investigation of how stress-responsive regulatory programs are coupled to carbon metabolism during acid adaptation.\n                    <\/jats:p>\n                    <jats:sec>\n                      <jats:title>IMPORTANCE<\/jats:title>\n                      <jats:p>\n                        <jats:italic toggle=\"yes\">Mycobacterium tuberculosis<\/jats:italic>\n                        (Mtb) persists in host environments that are both acidic and nutritionally variable, but the regulatory processes that connect these stresses to metabolism remain incompletely understood. We show that loss of the lysine acetyltransferase Rv0998 impairs growth at acidic pH when glucose is the major carbon source, and is accompanied by broad changes in gene expression and incorporation of glucose-derived carbon into central metabolites. The phenotype is not apparent when glycerol is also present, indicating that the response depends on carbon-source context. These findings identify Rv0998 as a contributor to the coordination of acid-stress adaptation and central carbon metabolism in Mtb, the bacterium that causes tuberculosis.\n                      <\/jats:p>\n                    <\/jats:sec>\n                  <\/jats:sec>","DOI":"10.1128\/jb.00408-26","type":"journal-article","created":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T14:27:46Z","timestamp":1791296866000},"update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":0,"title":["The lysine acetyltransferase Rv0998 coordinates transcriptional and metabolic adaptation of\n                    <i>Mycobacterium tuberculosis<\/i>\n                    to acidic pH"],"prefix":"10.1128","author":[{"given":"Yi","family":"Liu","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/041kmwe10","id-type":"ROR","asserted-by":"publisher"}],"name":"Centre for Bacterial Resistance Biology, Imperial College London","place":["London, United Kingdom"]},{"id":[{"id":"https:\/\/ror.org\/041kmwe10","id-type":"ROR","asserted-by":"publisher"}],"name":"Department of Life Sciences, Imperial College London","place":["London, United Kingdom"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nadia","family":"Fernandes","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/041kmwe10","id-type":"ROR","asserted-by":"publisher"}],"name":"Department of Infectious Diseases, Imperial College London","place":["London, United Kingdom"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Valwynne","family":"Faulkner","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/041kmwe10","id-type":"ROR","asserted-by":"publisher"}],"name":"Department of Metabolism, Digestion and Reproduction, Imperial College London","place":["London, United Kingdom"]},{"id":[{"id":"https:\/\/ror.org\/04tnbqb63","id-type":"ROR","asserted-by":"publisher"}],"name":"Systems Chemical Biology of Infection and Resistance Laboratory, Francis Crick Institute","place":["London, United Kingdom"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Richard","family":"Williams","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/041kmwe10","id-type":"ROR","asserted-by":"publisher"}],"name":"Department of Infectious Diseases, Imperial College London","place":["London, United Kingdom"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0335-8337","authenticated-orcid":true,"given":"Eachan","family":"Johnson","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/041kmwe10","id-type":"ROR","asserted-by":"publisher"}],"name":"Department of Metabolism, Digestion and Reproduction, Imperial College London","place":["London, United Kingdom"]},{"id":[{"id":"https:\/\/ror.org\/04tnbqb63","id-type":"ROR","asserted-by":"publisher"}],"name":"Systems Chemical Biology of Infection and Resistance Laboratory, Francis Crick Institute","place":["London, United Kingdom"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2786-7344","authenticated-orcid":true,"given":"Sandhya","family":"Visweswariah","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/004srxn73","id-type":"ROR","asserted-by":"publisher"}],"name":"Department of Developmental Biology and Genetics, Indian Institute of Science","place":["Bengaluru, India"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brian D.","family":"Robertson","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/041kmwe10","id-type":"ROR","asserted-by":"publisher"}],"name":"Centre for Bacterial Resistance Biology, Imperial College London","place":["London, United Kingdom"]},{"id":[{"id":"https:\/\/ror.org\/041kmwe10","id-type":"ROR","asserted-by":"publisher"}],"name":"Department of Infectious Diseases, Imperial College London","place":["London, United Kingdom"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6614-8698","authenticated-orcid":true,"given":"Gerald","family":"Larrouy-Maumus","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/041kmwe10","id-type":"ROR","asserted-by":"publisher"}],"name":"Centre for Bacterial Resistance Biology, Imperial College London","place":["London, United Kingdom"]},{"id":[{"id":"https:\/\/ror.org\/041kmwe10","id-type":"ROR","asserted-by":"publisher"}],"name":"Department of Life Sciences, Imperial College London","place":["London, United Kingdom"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"235","published-online":{"date-parts":[[2026,10,6]]},"reference":[{"key":"e_1_3_4_2_2","unstructured":"WHO. 2022. 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