1K97

Crystal Structure of E. coli Argininosuccinate Synthetase in complex with Aspartate and Citrulline


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.176 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

The 1.6 A crystal structure of E. coli argininosuccinate synthetase suggests a conformational change during catalysis.

Lemke, C.T.Howell, P.L.

(2001) Structure 9: 1153-1164

  • DOI: 10.1016/s0969-2126(01)00683-9
  • Primary Citation of Related Structures:  
    1K92, 1K97

  • PubMed Abstract: 
  • Argininosuccinate synthetase (AS) is the rate-limiting enzyme of both the urea and arginine-citrulline cycles. In mammals, deficiency of AS leads to citrullinemia, a debilitating and often fatal autosomal recessive urea cycle disorder, whereas its overexpression for sustained nitric oxide production via the arginine-citrulline cycle leads to the potentially fatal hypotension associated with septic and cytokine-induced circulatory shock ...

    Argininosuccinate synthetase (AS) is the rate-limiting enzyme of both the urea and arginine-citrulline cycles. In mammals, deficiency of AS leads to citrullinemia, a debilitating and often fatal autosomal recessive urea cycle disorder, whereas its overexpression for sustained nitric oxide production via the arginine-citrulline cycle leads to the potentially fatal hypotension associated with septic and cytokine-induced circulatory shock.


    Organizational Affiliation

    Structural Biology and Biochemistry, Research Institute, Hospital for Sick Children, 555 University Avenue, Toronto, Ontario M5G 1X8, Canada.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ARGININOSUCCINATE SYNTHASEA455Escherichia coliMutation(s): 0 
Gene Names: argG
EC: 6.3.4.5
UniProt
Find proteins for P0A6E4 (Escherichia coli (strain K12))
Explore P0A6E4 
Go to UniProtKB:  P0A6E4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A6E4
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CIR
Query on CIR

Download Ideal Coordinates CCD File 
C [auth A]CITRULLINE
C6 H13 N3 O3
RHGKLRLOHDJJDR-BYPYZUCNSA-N
 Ligand Interaction
ASP
Query on ASP

Download Ideal Coordinates CCD File 
B [auth A]ASPARTIC ACID
C4 H7 N O4
CKLJMWTZIZZHCS-REOHCLBHSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.176 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.996α = 90
b = 105.336β = 90
c = 127.36γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-12-07
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance