2XYO

Structural basis for a new tetracycline resistance mechanism relying on the TetX monooxygenase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.249 
  • R-Value Observed: 0.251 

wwPDB Validation   3D Report Full Report


This is version 1.4 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:  
    2XYO, 2XDO, 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 pathogens ...

    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 ABCD399Bacteroides 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
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.249 
  • R-Value Observed: 0.251 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 87.345α = 90
b = 68.658β = 101.08
c = 152.483γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
Auto-Rickshawphasing
SHARPphasing
REFMACrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • 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
  • Version 1.3: 2019-03-06
    Changes: Data collection, Derived calculations, Experimental preparation, Other
  • Version 1.4: 2019-07-17
    Changes: Data collection