Crystal Structure of Thermus thermophilus HB8 Argininosuccinate Synthetase

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.199 

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Crystal structure of argininosuccinate synthetase from Thermus thermophilus HB8. Structural basis for the catalytic action.

Goto, M.Nakajima, Y.Hirotsu, K.

(2002) J Biol Chem 277: 15890-15896

  • DOI: https://doi.org/10.1074/jbc.M112430200
  • Primary Citation of Related Structures:  
    1KH1, 1KH2, 1KOR

  • PubMed Abstract: 

    Argininosuccinate synthetase catalyzes the ATP-dependent condensation of a citrulline with an aspartate to give argininosuccinate. The three-dimensional structures of the enzyme from Thermus thermophilus HB8 in its free form, complexed with intact ATP, and complexed with an ATP analogue (adenylyl imidodiphosphate) and substrate analogues (arginine and succinate) have been determined at 2.3-, 2.3-, and 1.95-A resolution, respectively. The structure is essentially the same as that of the Escherichia coli argininosuccinate synthetase. The small domain has the same fold as that of a new family of "N-type" ATP pyrophosphatases with the P-loop specific for the pyrophosphate of ATP. However, the enzyme shows the P-loop specific for the gamma-phosphate of ATP. The structure of the complex form is quite similar to that of the native one, indicating that no conformational change occurs upon the binding of ATP and the substrate analogues. ATP and the substrate analogues are bound to the active site with their reaction sites close to one another and located in a geometrical orientation favorable to the catalytic action. The reaction mechanism so far proposed seems to be consistent with the locations of ATP and the substrate analogues. The reaction may proceed without the large conformational change of the enzyme proposed for the catalytic process.

  • Organizational Affiliation

    Department of Chemistry, Graduate School of Science, Osaka City University, Osaka 558-8585, Japan.

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Argininosuccinate Synthetase
A, B, C, D
400Thermus thermophilusMutation(s): 0 
Gene Names: HB8
Find proteins for P59846 (Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8))
Explore P59846 
Go to UniProtKB:  P59846
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP59846
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.199 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 228.41α = 90
b = 228.41β = 90
c = 161.53γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-04-03
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-06-20
    Changes: Data collection, Structure summary
  • Version 1.4: 2024-03-13
    Changes: Data collection, Database references, Derived calculations