Báo cáo khoa học: Gene regulation by tetracyclines Constraints of resistance regulation in bacteria shape TetR for application in eukaryotes Christian Berens and Wolfgang Hillen
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The Tet repressor protein (TetR) regulates transcription of a family of tetracycline (tc) resistance determinants in Gram-negative bacteria. The resistance protein TetA, a membrane-spanning H + -[tcÆM]+ antiporter, must be sen-sitively regulated because its expression is harmful in the absence of tc, yet it has to be expressed before the drugs’ concentration reaches cytoplasmic levels inhibitory for protein synthesis.
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