1QPI

CRYSTAL STRUCTURE OF TETRACYCLINE REPRESSOR/OPERATOR COMPLEX


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.307 
  • R-Value Work: 0.244 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis of gene regulation by the tetracycline inducible Tet repressor-operator system.

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

(2000) Nat.Struct.Mol.Biol. 7: 215-219

  • DOI: 10.1038/73324
  • Primary Citation of Related Structures:  
  • Also Cited By: 2VPR

  • PubMed Abstract: 
  • The tetracycline repressor (TetR) regulates the most abundant resistance mechanism against the antibiotic tetracycline in grain-negative bacteria. The TetR protein and its mutants are commonly used as control elements to regulate gene expression in h ...

    The tetracycline repressor (TetR) regulates the most abundant resistance mechanism against the antibiotic tetracycline in grain-negative bacteria. The TetR protein and its mutants are commonly used as control elements to regulate gene expression in higher eukaryotes. We present the crystal structure of the TetR homodimer in complex with its palindromic DNA operator at 2.5 A resolution. Comparison to the structure of TetR in complex with the inducer tetracycline-Mg2+ allows the mechanism of induction to be deduced. Inducer binding in the repressor core initiates conformational changes starting with C-terminal unwinding and shifting of the short helix a6 in each monomer. This forces a pendulum-like motion of helix a4, which increases the separation of the attached DNA binding domains by 3 A, abolishing the affinity of TetR for its operator DNA.


    Organizational Affiliation

    Institut für Chemie, Kristallographie, Freie Universität Berlin, Takustr. 6, D-14195 Berlin, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (TETRACYCLINE REPRESSOR)
A
203Escherichia coliMutation(s): 0 
Gene Names: tetR
Find proteins for P0ACT4 (Escherichia coli)
Go to UniProtKB:  P0ACT4
Entity ID: 1
MoleculeChainsLengthOrganism
DNA (5'-D(*CP*CP*TP*AP*TP*CP*AP*AP*TP*GP*AP*TP*AP*GP*A)-3')M15N/A
Entity ID: 2
MoleculeChainsLengthOrganism
DNA (5'-D(*TP*CP*TP*AP*TP*CP*AP*TP*TP*GP*AP*TP*AP*GP*G)-3')N15N/A
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IMD
Query on IMD

Download SDF File 
Download CCD File 
A
IMIDAZOLE
C3 H5 N2
RAXXELZNTBOGNW-UHFFFAOYSA-O
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.307 
  • R-Value Work: 0.244 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 38.040α = 90.00
b = 193.200β = 90.00
c = 91.750γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
X-PLORrefinement
AMoREphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-02-28
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance