2QIR

Crystal structure of aminoglycoside acetyltransferase AAC(6')-Ib in complex whith coenzyme A and kanamycin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.194 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.5 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: https://doi.org/10.1038/embor.2008.9
  • Primary Citation of Related Structures:  
    2PR8, 2PRB, 2QIR

  • 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 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Aminoglycoside 6-N-acetyltransferase type Ib11196Salmonella enterica subsp. enterica serovar TyphimuriumMutation(s): 2 
Gene Names: aac(6')-Ib
EC: 2.3.1.82
UniProt
Find proteins for Q8GLI5 (Salmonella typhimurium)
Explore Q8GLI5 
Go to UniProtKB:  Q8GLI5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8GLI5
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
COA
Query on COA

Download Ideal Coordinates CCD File 
B [auth A]COENZYME A
C21 H36 N7 O16 P3 S
RGJOEKWQDUBAIZ-IBOSZNHHSA-N
9CS
Query on 9CS

Download Ideal Coordinates CCD File 
C [auth A](1R,2S,3S,4R,6S)-4,6-DIAMINO-3-[(3-AMINO-3-DEOXY-ALPHA-D-GLUCOPYRANOSYL)OXY]-2-HYDROXYCYCLOHEXYL 2,6-DIAMINO-2,6-DIDEOXY-ALPHA-D-GLUCOPYRANOSIDE
C18 H37 N5 O10
SKKLOUVUUNMCJE-FQSMHNGLSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.194 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.404α = 90
b = 57.404β = 90
c = 145.57γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
ADSCdata collection
MOSFLMdata reduction

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-04-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2016-12-07
    Changes: Non-polymer description
  • Version 1.3: 2017-10-11
    Changes: Data collection
  • Version 1.4: 2021-10-20
    Changes: Database references, Derived calculations, Structure summary
  • Version 1.5: 2023-08-30
    Changes: Data collection, Refinement description