6EMZ

Structure of the Tn1549 transposon Integrase (aa 82-397, R225K) in complex with circular intermediate DNA (CI5-DNA)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.79 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Transposase-DNA Complex Structures Reveal Mechanisms for Conjugative Transposition of Antibiotic Resistance.

Rubio-Cosials, A.Schulz, E.C.Lambertsen, L.Smyshlyaev, G.Rojas-Cordova, C.Forslund, K.Karaca, E.Bebel, A.Bork, P.Barabas, O.

(2018) Cell 173: 208-220.e20

  • DOI: 10.1016/j.cell.2018.02.032
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Conjugative transposition drives the emergence of multidrug resistance in diverse bacterial pathogens, yet the mechanisms are poorly characterized. The Tn1549 conjugative transposon propagates resistance to the antibiotic vancomycin used for severe d ...

    Conjugative transposition drives the emergence of multidrug resistance in diverse bacterial pathogens, yet the mechanisms are poorly characterized. The Tn1549 conjugative transposon propagates resistance to the antibiotic vancomycin used for severe drug-resistant infections. Here, we present four high-resolution structures of the conserved Y-transposase of Tn1549 complexed with circular transposon DNA intermediates. The structures reveal individual transposition steps and explain how specific DNA distortion and cleavage mechanisms enable DNA strand exchange with an absolute minimum homology requirement. This appears to uniquely allow Tn916-like conjugative transposons to bypass DNA homology and insert into diverse genomic sites, expanding gene transfer. We further uncover a structural regulatory mechanism that prevents premature cleavage of the transposon DNA before a suitable target DNA is found and generate a peptide antagonist that interferes with the transposase-DNA structure to block transposition. Our results reveal mechanistic principles of conjugative transposition that could help control the spread of antibiotic resistance genes.


    Organizational Affiliation

    Structural and Computational Biology Unit, European Molecular Biology Laboratory (EMBL), 69117 Heidelberg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Int protein
A, B
317Enterococcus faecalisMutation(s): 1 
Gene Names: int
Find proteins for Q7BP35 (Enterococcus faecalis)
Go to UniProtKB:  Q7BP35
Entity ID: 2
MoleculeChainsLengthOrganism
DNA (44-MER)C44Clostridioides difficile
Entity ID: 3
MoleculeChainsLengthOrganism
DNA (44-MER)E44Clostridioides difficile
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.79 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.197 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 64.590α = 90.00
b = 125.060β = 96.53
c = 77.980γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-04-04
    Type: Initial release