1KOR

Crystal Structure of Thermus thermophilus HB8 Argininosuccinate Synthetase in complex with inhibitors

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.230 

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This is version 1.2 of the entry. See complete history. 


Literature

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: 10.1074/jbc.M112430200
  • Primary Citation of Related Structures:  
    1KH2, 1KH1, 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 AT ...

    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.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Argininosuccinate SynthetaseA, B, C, D400Thermus thermophilusMutation(s): 0 
Gene Names: HB8
EC: 6.3.4.5
Find proteins for P59846 (Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579))
Explore P59846 
Go to UniProtKB:  P59846
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.230 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 229.43α = 90
b = 229.43β = 90
c = 160.55γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • 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