Crystal structure of putative acetolactate synthase- small subunit from Nitrosomonas europaea

Experimental Data Snapshot

  • Resolution: 2.50 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.208 

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This is version 1.5 of the entry. See complete history


Crystal structures of TM0549 and NE1324--two orthologs of E. coli AHAS isozyme III small regulatory subunit.

Petkowski, J.J.Chruszcz, M.Zimmerman, M.D.Zheng, H.Skarina, T.Onopriyenko, O.Cymborowski, M.T.Koclega, K.D.Savchenko, A.Edwards, A.Minor, W.

(2007) Protein Sci 16: 1360-1367

  • DOI: https://doi.org/10.1110/ps.072793807
  • Primary Citation of Related Structures:  
    2FGC, 2PC6

  • PubMed Abstract: 

    Crystal structures of two orthologs of the regulatory subunit of acetohydroxyacid synthase III (AHAS, EC from Thermotoga maritima (TM0549) and Nitrosomonas europea (NE1324) were determined by single-wavelength anomalous diffraction methods with the use of selenomethionine derivatives at 2.3 A and 2.5 A, respectively. TM0549 and NE1324 share the same fold, and in both proteins the polypeptide chain contains two separate domains of a similar size. Each protein contains a C-terminal domain with ferredoxin-type fold and an N-terminal ACT domain, of which the latter is characteristic for several proteins involved in amino acid metabolism. The ferredoxin domain is stabilized by a calcium ion in the crystal structure of NE1324 and by a Mg(H2O)(6)2+ ion in TM0549. Both TM0549 and NE1324 form dimeric assemblies in the crystal lattice.

  • Organizational Affiliation

    Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville 22908, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Probable acetolactate synthase isozyme III (Small subunit)
A, B, C, D
165Nitrosomonas europaea ATCC 19718Mutation(s): 0 
Gene Names: ilvHNE1324
Find proteins for Q82UZ2 (Nitrosomonas europaea (strain ATCC 19718 / CIP 103999 / KCTC 2705 / NBRC 14298))
Explore Q82UZ2 
Go to UniProtKB:  Q82UZ2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ82UZ2
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

Unit Cell:
Length ( Å )Angle ( ˚ )
a = 122.123α = 90
b = 122.123β = 90
c = 111.559γ = 90
Software Package:
Software NamePurpose
HKL-2000data scaling
SHELXEmodel building
DMmodel building
Omodel building
Cootmodel building
CCP4model building
HKL-2000data collection
HKL-2000data reduction
ARP/wARPmodel building

Structure Validation

View Full Validation Report

Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2007-04-10
    Type: Initial release
  • Version 1.1: 2007-10-09
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Derived calculations, Version format compliance
  • Version 1.3: 2012-02-01
    Changes: Non-polymer description
  • Version 1.4: 2017-10-18
    Changes: Refinement description
  • Version 1.5: 2022-04-13
    Changes: Database references, Derived calculations, Structure summary