How an in vitro selected peptide mimics the antibiotic tetracycline to induce TET repressor

Experimental Data Snapshot

  • Resolution: 2.40 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.234 

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This is version 1.6 of the entry. See complete history


How an agonist peptide mimics the antibiotic tetracycline to induce Tet-repressor

Luckner, S.R.Klotzsche, M.Berens, C.Hillen, W.Muller, Y.A.

(2007) J Mol Biol 368: 780-790

  • DOI: https://doi.org/10.1016/j.jmb.2007.02.030
  • Primary Citation of Related Structures:  
    2NS7, 2NS8

  • PubMed Abstract: 

    A 16-residue peptide, called Tip, induces the tetracycline repressor TetR as efficiently as the antibiotic tetracycline when fused to the N or C terminus of another protein. This is unusual because the majority of in vitro selected peptides, such as Tip, inhibit protein function, and agonist peptides are only rarely identified. We elucidated the atomic mechanism of TetR induction by Tip from crystal structures of TetR in complex with Tip and of free TetR. Peptide induction ultimately results in the same movements of DNA reading heads, but Tip accomplishes this by very different molecular interactions from tetracycline involving important contacts to the TetR surface. As a direct consequence, an alternate pathway of allostery becomes possible that makes ample use of intersubunit interactions. For the first time it is possible to show in atomic detail how a small molecule controlled bacterial transcription factor such as TetR becomes responsive to protein-protein interactions, characteristic of gene transcription regulation in higher organisms.

  • Organizational Affiliation

    Lehrstuhl für Biotechnik, Institut für Biologie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tetracycline repressor protein
A, B, C, D
208Escherichia coli K-12Mutation(s): 4 
Gene Names: tetR
Find proteins for P04483 (Escherichia coli)
Explore P04483 
Go to UniProtKB:  P04483
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04483
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.40 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.234 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 107.91α = 90
b = 107.91β = 90
c = 303.94γ = 120
Software Package:
Software NamePurpose
XSCALEdata scaling
PDB_EXTRACTdata extraction
MAR345data collection
XDSdata reduction

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-07-24
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Source and taxonomy, Version format compliance
  • Version 1.3: 2017-08-16
    Changes: Refinement description, Source and taxonomy
  • Version 1.4: 2017-10-18
    Changes: Refinement description
  • Version 1.5: 2021-11-10
    Changes: Database references
  • Version 1.6: 2023-10-25
    Changes: Data collection, Refinement description