Crystal Structure of Homoserine O-acetyltransferase from Leptospira interrogans

Experimental Data Snapshot

  • Resolution: 2.20 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.218 

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Crystal structure of homoserine O-acetyltransferase from Leptospira interrogans

Wang, M.Liu, L.Wang, Y.Wei, Z.Zhang, P.Li, Y.Jiang, X.Xu, H.Gong, W.

(2007) Biochem Biophys Res Commun 363: 1050-1056

  • DOI: https://doi.org/10.1016/j.bbrc.2007.08.153
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Homoserine O-acetyltransferase (HTA, EC initiates methionine biosynthesis pathway by catalyzing the transfer of acetyl group from acetyl-CoA to homoserine. This study reports the crystal structure of HTA from Leptospira interrogans determined at 2.2A resolution using selenomethionyl single-wavelength anomalous diffraction method. HTA is modular and consists of two structurally distinct domains--a core alpha/beta domain containing the catalytic site and a helical bundle called the lid domain. Overall, the structure fold belongs to alpha/beta hydrolase superfamily with the characteristic 'catalytic triad' residues in the active site. Detailed structure analysis showed that the catalytic histidine and serine are both present in two conformations, which may be involved in the catalytic mechanism for acetyl transfer.

  • Organizational Affiliation

    National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing 100101, PR China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Homoserine O-acetyltransferase366Leptospira interrogansMutation(s): 0 
Gene Names: metX
Find proteins for Q8F4I0 (Leptospira interrogans serogroup Icterohaemorrhagiae serovar Lai (strain 56601))
Explore Q8F4I0 
Go to UniProtKB:  Q8F4I0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8F4I0
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.218 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.124α = 90
b = 61.124β = 90
c = 215.143γ = 90
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-11-20
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Derived calculations, Version format compliance