2XB5

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.168 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.7 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: 418-420

  • DOI: https://doi.org/10.1126/science.8153629
  • Primary Citation of Related Structures:  
    2TRT, 2XB5

  • 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 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.


  • Organizational Affiliation

    Institut für Kristallographie, Freie Universität Berlin, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
TETRACYCLINE REPRESSOR PROTEIN CLASS D207Escherichia coliMutation(s): 0 
UniProt
Find proteins for P0ACT4 (Escherichia coli)
Explore P0ACT4 
Go to UniProtKB:  P0ACT4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0ACT4
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.168 
  • Space Group: I 41 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 68.86α = 90
b = 68.86β = 90
c = 180.94γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-10-06
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-03-07
    Changes: Source and taxonomy
  • Version 1.4: 2019-05-08
    Changes: Data collection, Experimental preparation
  • Version 1.5: 2019-07-24
    Changes: Data collection
  • Version 1.6: 2019-10-09
    Changes: Data collection, Database references, Other
  • Version 1.7: 2024-05-08
    Changes: Data collection, Database references, Derived calculations