{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,12]],"date-time":"2025-11-12T03:17:08Z","timestamp":1762917428279},"reference-count":0,"publisher":"American Society for Microbiology","issue":"1","license":[{"start":{"date-parts":[[1995,1,1]],"date-time":"1995-01-01T00:00:00Z","timestamp":788918400000},"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":["Antimicrob Agents Chemother"],"published-print":{"date-parts":[[1995,1]]},"abstract":"<jats:p>A novel tetracycline derivative, DMG-DMDOT [9-(N,N-dimethylglycylamido)-6-demethyl-6-deoxytetracycline] , is one of the glycylcyclines which have a broad antibacterial spectrum, including many tetracyclineresistant bacteria (R.T. Testa, P.J. Petersen, N.V. Jacobus, P.-E. Sum, V.J. Lee, and F.P. Tally, Antimicrob. Agents Chemother. 37:2270-2277, 1993). The mechanism by which DMG-DMDOT overcomes efflux-based tetracycline resistance was investigated. Tetracycline-resistant Escherichia coli cells carrying an R plasmid encoding the tet(B) gene, which encodes the typical tetracycline efflux pump [TetA(B)] of gram-negative bacteria, were as susceptible to DMG-DMDOT as was the tetracycline-susceptible host. When mid-log-phase cells carrying the tet(B) gene were incubated with a subbactericidal concentration of DMG-DMDOT (0.5 micrograms\/ml) for 2 h, a significant amount of the TetA(B) protein was detected in the cell membrane by Western blotting (immunoblotting) with an anti-carboxyl-terminal antibody, similar to the case in which tetracycline was used as the inducer, indicating that the tet repressor, TetR, can recognize DMG-DMDOT as an efficient inducer. Everted membrane vesicles prepared from cells producing the TetA(B) protein showed absolutely no transport activity for DMG-DMDOT. Furthermore, the presence of excess DMG-DMDOT had no effect on the tetracycline transport activity of the everted vesicles, indicating that DMG-DMDOT is not recognized as a substrate by the TetA(B) protein.<\/jats:p>","DOI":"10.1128\/aac.39.1.247","type":"journal-article","created":{"date-parts":[[2012,6,28]],"date-time":"2012-06-28T00:06:25Z","timestamp":1340841985000},"page":"247-249","update-policy":"http:\/\/dx.doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":44,"title":["A novel glycylcycline, 9-(N,N-dimethylglycylamido)-6-demethyl-6-deoxytetracycline, is neither transported nor recognized by the transposon Tn10-encoded metal-tetracycline\/H+ antiporter"],"prefix":"10.1128","volume":"39","author":[{"given":"Y","family":"Someya","sequence":"first","affiliation":[{"name":"Division of Microbial Chemistry, Faculty of Pharmaceutical Sciences, Chiba University, Japan."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A","family":"Yamaguchi","sequence":"additional","affiliation":[{"name":"Division of Microbial Chemistry, Faculty of Pharmaceutical Sciences, Chiba University, Japan."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"T","family":"Sawai","sequence":"additional","affiliation":[{"name":"Division of Microbial Chemistry, Faculty of Pharmaceutical Sciences, Chiba University, Japan."}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"235","container-title":["Antimicrobial Agents and Chemotherapy"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.asm.org\/doi\/pdf\/10.1128\/AAC.39.1.247","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.asm.org\/doi\/pdf\/10.1128\/AAC.39.1.247","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2022,2,21]],"date-time":"2022-02-21T20:01:28Z","timestamp":1645473688000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.asm.org\/doi\/10.1128\/AAC.39.1.247"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1995,1]]},"references-count":0,"journal-issue":{"issue":"1","published-print":{"date-parts":[[1995,1]]}},"alternative-id":["10.1128\/AAC.39.1.247"],"URL":"https:\/\/doi.org\/10.1128\/aac.39.1.247","relation":{},"ISSN":["0066-4804","1098-6596"],"issn-type":[{"value":"0066-4804","type":"print"},{"value":"1098-6596","type":"electronic"}],"subject":[],"published":{"date-parts":[[1995,1]]},"assertion":[{"value":"1995-01-01","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}