2Y6R

Structure of the TetX monooxygenase in complex with the substrate 7- chlortetracycline


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.225 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Basis for a New Tetracycline Resistance Mechanism Relying on the Tetx Monooxygenase.

Volkers, G.Palm, G.J.Weiss, M.S.Wright, G.D.Hinrichs, W.

(2011) FEBS Lett. 585: 1061

  • DOI: 10.1016/j.febslet.2011.03.012
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The flavin-dependent monooxygenase TetX confers resistance to all clinically relevant tetracyclines, including the recently approved, broad-spectrum antibiotic tigecycline (Tygacil®) which is a critical last-ditch defense against multidrug-resistant ...

    The flavin-dependent monooxygenase TetX confers resistance to all clinically relevant tetracyclines, including the recently approved, broad-spectrum antibiotic tigecycline (Tygacil®) which is a critical last-ditch defense against multidrug-resistant pathogens. TetX represents the first resistance mechanism against tigecycline, which circumvents both the tet-gene encoded resistances, relying on active efflux of tetracyclines, and ribosomal protection proteins. The alternative enzyme-based mechanism of TetX depends on regioselective hydroxylation of tetracycline antibiotics to 11a-hydroxy-tetracyclines. Here, we report the X-ray crystallographic structure determinations at 2.1Å resolution of native TetX from Bacteroides thetaiotaomicron and its complexes with tetracyclines. Our crystal structures explain the extremely versatile substrate diversity of the enzyme and provide a first step towards the rational design of novel tetracycline derivatives to counter TetX-based resistance prior to emerging clinical observations.


    Organizational Affiliation

    Institut für Biochemie, Universität Greifswald, Greifswald, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TETX2 PROTEIN
A, B, C, D
398Bacteroides thetaiotaomicronMutation(s): 2 
Gene Names: tetX2 (tet(X))
Find proteins for Q93L51 (Bacteroides thetaiotaomicron)
Go to UniProtKB:  Q93L51
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C, D
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
FAD
Query on FAD

Download SDF File 
Download CCD File 
A, B, C, D
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
CTC
Query on CTC

Download SDF File 
Download CCD File 
A, B, C, D
7-CHLOROTETRACYCLINE
C22 H23 Cl N2 O8
CYDMQBQPVICBEU-XRNKAMNCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.225 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 67.416α = 110.99
b = 78.870β = 90.27
c = 86.609γ = 92.87
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-03-23
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance