1S3Z

Aminoglycoside N-Acetyltransferase AAC(6')-Iy in Complex with CoA and Ribostamycin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.167 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

A bacterial acetyltransferase capable of regioselective N-acetylation of antibiotics and histones

Vetting, M.W.Magnet, S.Nieves, E.Roderick, S.L.Blachard, J.S.

(2004) Chem Biol 11: 565-573

  • DOI: 10.1016/j.chembiol.2004.03.017
  • Primary Citation of Related Structures:  
    1S60, 1S5K, 1S3Z

  • PubMed Abstract: 
  • The Salmonella enterica chromosomally encoded AAC(6')-Iy has been shown to confer broad aminoglycoside resistance in strains in which the structural gene is expressed. The three-dimensional structures reported place the enzyme in the large Gcn5-relat ...

    The Salmonella enterica chromosomally encoded AAC(6')-Iy has been shown to confer broad aminoglycoside resistance in strains in which the structural gene is expressed. The three-dimensional structures reported place the enzyme in the large Gcn5-related N-acetyltransferase (GNAT) superfamily. The structure of the CoA-ribostamycin ternary complex allows us to propose a chemical mechanism for the reaction, and comparison with the Mycobacterium tuberculosis AAC(2')-CoA-ribostamycin complex allows us to define how regioselectivity of acetylation is achieved. The AAC(6')-Iy dimer is most structurally similar to the Saccharomyces cerevisiae Hpa2-encoded histone acetyltransferase. We demonstrate that AAC(6')-Iy catalyzes both acetyl-CoA-dependent self-alpha-N-acetylation and acetylation of eukaryotic histone proteins and the human histone H3 N-terminal peptide. These structural and catalytic similarities lead us to propose that chromosomally encoded bacterial acetyltransferases, including those functionally identified as aminoglycoside acetyltransferases, are the evolutionary progenitors of the eukaryotic histone acetyltransferases.


    Related Citations: 
    • Kinetic and mutagenic characterization of the chromosomally encoded Salmonella enterica AAC(6')-Iy aminoglycoside N-acetyltransferase
      Magnet, S., Lambert, T., Courvalin, P., Blanchard, J.S.
      (2001) Biochemistry 40: 3700

    Organizational Affiliation

    Department of Biochemistry, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461 USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
aminoglycoside 6'-N-acetyltransferaseA, B165Salmonella enterica subsp. enterica serovar EnteritidisMutation(s): 0 
EC: 2.3.1.82
Find proteins for Q9R381 (Salmonella enteritidis)
Explore Q9R381 
Go to UniProtKB:  Q9R381
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
COA
Query on COA

Download CCD File 
A, B
COENZYME A
C21 H36 N7 O16 P3 S
RGJOEKWQDUBAIZ-IBOSZNHHSA-N
 Ligand Interaction
RIO
Query on RIO

Download CCD File 
A, B
RIBOSTAMYCIN
C17 H34 N4 O10
NSKGQURZWSPSBC-VVPCINPTSA-N
 Ligand Interaction
SO4
Query on SO4

Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
NI
Query on NI

Download CCD File 
A
NICKEL (II) ION
Ni
VEQPNABPJHWNSG-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.167 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 84.989α = 90
b = 44.688β = 93.86
c = 87.974γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SOLVEphasing
CNSrefinement
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-05-18
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2011-11-16
    Changes: Atomic model