2Y6Q

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.37 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.219 

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:  
    2XDO, 2XYO, 2Y6Q, 2Y6R

  • 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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TETX2 PROTEINABCD398Bacteroides thetaiotaomicronMutation(s): 0 
Gene Names: tetX2
EC: 1.14.13.231
Find proteins for Q93L51 (Bacteroides thetaiotaomicron)
Explore Q93L51 
Go to UniProtKB:  Q93L51
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

Download Ideal Coordinates CCD File 
A, B, C, D
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
I7T
Query on I7T

Download Ideal Coordinates CCD File 
A, B, C, D
7-IODOTETRACYCLINE
C21 H21 I N2 O7
HTASTNARVGFMKI-UVPAEMEASA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
A, B, C, D
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.37 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.219 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 68.7α = 111.1
b = 79.96β = 90.41
c = 88γ = 92.96
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

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