1A6I

TET REPRESSOR, CLASS D VARIANT


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.214 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Conformational changes of the Tet repressor induced by tetracycline trapping.

Orth, P.Cordes, F.Schnappinger, D.Hillen, W.Saenger, W.Hinrichs, W.

(1998) J.Mol.Biol. 279: 439-447

  • DOI: 10.1006/jmbi.1998.1775

  • PubMed Abstract: 
  • The X-ray crystal structure analysis of inducer-free Tet repressor, TetR, at 2.4 A resolution identifies one of two openings of the tunnel-like binding site as the entrance for the inducer tetracycline-Mg2+, [Mg Tc]+. Recognition and binding of the i ...

    The X-ray crystal structure analysis of inducer-free Tet repressor, TetR, at 2.4 A resolution identifies one of two openings of the tunnel-like binding site as the entrance for the inducer tetracycline-Mg2+, [Mg Tc]+. Recognition and binding of the inducer unleashes conformational changes leading to the induced state of TetR. In the first step, the C-terminal turn of alpha-helix 6 unwinds, thereby altering the orientation of alpha-helix 4. This different orientation of alpha-helix 4 is stabilized by a series of hydrogen bonds mediated through a chain of eight water molecules. The alpha-helix 4 connects the DNA-binding domain (alpha-helices 1 to 3) to the rigid TetR core, and thus regulates gene expression through its respective orientations.


    Related Citations: 
    • Structure of the Tet Repressor-Tetracycline Complex and Regulation of Antibiotic Resistance
      Hinrichs, W.,Kisker, C.,Duvel, M.,Muller, A.,Tovar, K.,Hillen, W.,Saenger, W.
      (1994) Science 264: 418
    • The Complex Formed between Tet Repressor and Tetracycline-Mg2+ Reveals Mechanism of Antibiotic Resistance
      Kisker, C.,Hinrichs, W.,Tovar, K.,Hillen, W.,Saenger, W.
      (1995) J.Mol.Biol. 247: 260


    Organizational Affiliation

    Institut für Kristallographie, Freie Universität Berlin, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TETRACYCLINE REPRESSOR PROTEIN CLASS D
A
217Escherichia coliGene Names: tetR
Find proteins for P0ACT4 (Escherichia coli)
Go to UniProtKB:  P0ACT4
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.214 
  • Space Group: I 41 2 2
Unit Cell:
Length (Å)Angle (°)
a = 69.810α = 90.00
b = 69.810β = 90.00
c = 184.950γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
CCP4data scaling
X-PLORrefinement
MOSFLMdata reduction
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-03-02
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance