2PR8

crystal structure of aminoglycoside N-acetyltransferase AAC(6')-Ib11


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.196 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Enzyme structural plasticity and the emergence of broad-spectrum antibiotic resistance.

Maurice, F.Broutin, I.Podglajen, I.Benas, P.Collatz, E.Dardel, F.

(2008) Embo Rep. 9: 344-349

  • DOI: 10.1038/embor.2008.9
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The emergence of multi-resistant pathogenic bacteria is a worldwide health issue. Recently, clinical variants of a single antibiotic-modifying acetyltransferase, AAC(6')-Ib-a variant of aminoglycoside 6'-N-acetyltransferase-have been identified that ...

    The emergence of multi-resistant pathogenic bacteria is a worldwide health issue. Recently, clinical variants of a single antibiotic-modifying acetyltransferase, AAC(6')-Ib-a variant of aminoglycoside 6'-N-acetyltransferase-have been identified that confer extended resistance to most aminoglycosides and, more surprisingly, to structurally unrelated fluoroquinolones. The corresponding gene is carried by mobile genetic elements and is present in most multi-resistant pathogenic strains, hence making it a serious threat to current therapies. Here, we report the crystal structures of both narrow- and broad-spectrum resistance variants of this enzyme, which reveal the structural basis for the emergence of extended resistance. The active site shows an important plasticity and has adapted to new substrates by a large-scale gaping process. We have also obtained co-crystals with both substrates, and with a simple transition state analogue, which provides new clues for the design of inhibitors of this resistance mechanism.


    Organizational Affiliation

    Cristallographie and RMN Biologiques, Université Paris Descartes, CNRS, 4 Avenue de l'Observatoire, 75006 Paris, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Aminoglycoside 6-N-acetyltransferase type Ib11
A, B
196Salmonella typhimuriumMutation(s): 0 
Gene Names: aac(6')-Ib
Find proteins for Q8GLI5 (Salmonella typhimurium)
Go to UniProtKB:  Q8GLI5
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EPE
Query on EPE

Download SDF File 
Download CCD File 
A, B
4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
HEPES
C8 H18 N2 O4 S
JKMHFZQWWAIEOD-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.196 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 71.620α = 90.00
b = 85.370β = 90.00
c = 150.410γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
ADSCdata collection
PDB_EXTRACTdata extraction
PHASERphasing
XSCALEdata scaling
REFMACrefinement
SHARPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-04-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance