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Gene Regulation By Tetracyclines

Author: Christian Berens and Wolfgang Hillen

Field: Microbiology, Molecular Biology, Biochemistry, Genetics

Document Content:

This review article explores the Tet repressor protein (TetR) and its role in regulating tetracycline resistance in Gram-negative bacteria. It details how TetR’s sensitive regulation, due to its specific binding to operator sequences and high affinity for tetracyclines, makes it a valuable tool for controlling gene expression in eukaryotes. The article discusses the functional modifications required to adapt TetR for eukaryotic systems, highlighting the interplay between structural studies in bacteria and the specific needs of eukaryotic applications, resulting in a versatile regulatory system.

Detailed Table of Contents:

  • Properties of bacterial Tet systems
  • Regulation of Tc resistance is optimized for tightness and sensitivity
  • The structural change of TetR associated with induction by tetracycline is known
  • Tetracycline penetrates cells by diffusion
  • Tc-based gene regulation functions in different setups in many eukaryotic systems
  • Gene regulation by TetR in eukaryotes
  • Gene regulation by TetR-based transregulators
  • Modifications of the Tet transregulators
  • Alterations of the activator domain of tTA
  • Conversion of TetR to reverse TetR
  • Tet transregulators vary in their sensitivity towards tetracyclic inducers
  • The DNA binding specificity of Tet-transregulators can be changed
  • Mastering subunit recognition of TetR
  • Combinatorial Tet regulation solves special problems and allows sophisticated applications
  • One gene can be regulated stringently by conversely acting transrepressor and transactivator
  • Transgenes can be expressed in a graded or in a binary manner
  • Highlighting the regulatory potential and looking into the future