2XB5

Tet repressor (class D) in complex with 7-Iodotetracycline


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.162 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

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

  • Primary Citation of Related Structures:  
  • Also Cited By: 4AUX, 2XPW, 2XPV, 2XPU, 2XPT, 2XPS, 2X9D, 2VPR

  • PubMed Abstract: 
  • The most frequently occurring resistance of Gram-negative bacteria against tetracyclines is triggered by drug recognition of the Tet repressor. This causes dissociation of the repressor-operator DNA complex and enables expression of the resistance pr ...

    The most frequently occurring resistance of Gram-negative bacteria against tetracyclines is triggered by drug recognition of the Tet repressor. This causes dissociation of the repressor-operator DNA complex and enables expression of the resistance protein TetA, which is responsible for active efflux of tetracycline. The 2.5 angstrom resolution crystal structure of the homodimeric Tet repressor complexed with tetracycline-magnesium reveals detailed drug recognition. The orientation of the operator-binding helix-turn-helix motifs of the repressor is inverted in comparison with other DNA binding proteins. The repressor-drug complex is unable to interact with DNA because the separation of the DNA binding motifs is 5 angstroms wider than usually observed.


    Related Citations: 
    • 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
207Escherichia coliMutation(s): 0 
Gene Names: tetR
Find proteins for P0ACT4 (Escherichia coli)
Go to UniProtKB:  P0ACT4
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
I7T
Query on I7T

Download SDF File 
Download CCD File 
A
7-IODOTETRACYCLINE
C21 H21 I N2 O7
HTASTNARVGFMKI-UVPAEMEASA-N
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.162 
  • Space Group: I 41 2 2
Unit Cell:
Length (Å)Angle (°)
a = 68.860α = 90.00
b = 68.860β = 90.00
c = 180.940γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-10-06
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-03-07
    Type: Source and taxonomy