Arylamine N-acetyltransferase (NAT) from Salmonella typhimurium

Experimental Data Snapshot

  • Resolution: 2.80 Å
  • R-Value Free: 0.302 
  • R-Value Work: 0.264 
  • R-Value Observed: 0.264 

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This is version 1.3 of the entry. See complete history


Structure of Arylamine N-Acetyltransferase Reveals a Catalytic Triad

Sinclair, J.C.Sandy, J.Delgoda, R.Sim, E.Noble, M.E.M.

(2000) Nat Struct Biol 7: 560

  • DOI: https://doi.org/10.1038/76783
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Enzymes of the arylamine N-acetyltransferase (NAT) family are found in species ranging from Escherichia coli to humans. In humans they are known to be responsible for the acetylation of a number of arylamine and hydrazine drugs, and they are strongly linked to the carcinogenic potentiation of certain foreign substances. In prokaryotes their substrate specificities may vary and members of the gene family have been linked to pathways including amide synthesis during rifamycin production. Here we report the crystal structure at 2.8 A resolution of a representative member of this family from Salmonella typhimurium in the presence and absence of a covalently bound product analog. The structure reveals surprising mechanistic information including the presence of a Cys-His-Asp catalytic triad. The fold can be described in terms of three domains of roughly equal length with the second and third domains linked by an interdomain helix. The first two domains, a helical bundle and a beta-barrel, make up the catalytic triad using a structural motif identical to that of the cysteine protease superfamily.

  • Organizational Affiliation

    Laboratory of Molecular Biophysics and Oxford Centre for Molecular Sciences, Rex Richards Building, Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D, E
A, B, C, D, E, F, G, H
284Salmonella enterica subsp. enterica serovar TyphimuriumMutation(s): 0 
Gene Names: NHOA
Find proteins for Q00267 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore Q00267 
Go to UniProtKB:  Q00267
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ00267
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.80 Å
  • R-Value Free: 0.302 
  • R-Value Work: 0.264 
  • R-Value Observed: 0.264 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 134.53α = 90
b = 222.419β = 90
c = 104.662γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-07-07
    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: 2024-05-08
    Changes: Data collection, Database references, Other