2NZ2

Crystal structure of human argininosuccinate synthase in complex with aspartate and citrulline


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure of human argininosuccinate synthetase.

Karlberg, T.Collins, R.van den Berg, S.Flores, A.Hammarstrom, M.Hogbom, M.Holmberg Schiavone, L.Uppenberg, J.

(2008) Acta Crystallogr.,Sect.D 64: 279-286

  • DOI: 10.1107/S0907444907067455

  • PubMed Abstract: 
  • Argininosuccinate synthetase catalyzes the transformation of citrulline and aspartate into argininosuccinate and pyrophosphate using the hydrolysis of ATP to AMP and pyrophosphate. This enzymatic process constitutes the rate-limiting step in both the ...

    Argininosuccinate synthetase catalyzes the transformation of citrulline and aspartate into argininosuccinate and pyrophosphate using the hydrolysis of ATP to AMP and pyrophosphate. This enzymatic process constitutes the rate-limiting step in both the urea and arginine-citrulline cycles. Previous studies have investigated the crystal structures of argininosuccinate synthetase from bacterial species. In this work, the first crystal structure of human argininosuccinate synthetase in complex with the substrates citrulline and aspartate is presented. The human enzyme is compared with structures of argininosuccinate synthetase from bacteria. In addition, the structure also provides new insights into the function of the numerous clinical mutations identified in patients with type I citrullinaemia (also known as classic citrullinaemia).


    Organizational Affiliation

    Structural Genomics Consortium, Karolinska Institutet, MBB/SGC, 171 77 Stockholm, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Argininosuccinate synthase
A
413Homo sapiensGene Names: ASS1 (ASS)
EC: 6.3.4.5
Find proteins for P00966 (Homo sapiens)
Go to Gene View: ASS1
Go to UniProtKB:  P00966
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

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A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
ASP
Query on ASP

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A
ASPARTIC ACID
C4 H7 N O4
CKLJMWTZIZZHCS-REOHCLBHSA-N
 Ligand Interaction
CIR
Query on CIR

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Download CCD File 
A
CITRULLINE
C6 H13 N3 O3
RHGKLRLOHDJJDR-BYPYZUCNSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.194 
  • Space Group: F 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 95.940α = 90.00
b = 117.470β = 90.00
c = 155.150γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
XSCALEdata scaling
MAR345data collection
XDSdata reduction
MOLREPphasing

Structure Validation

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Entry History 

Revision History 

  • Version 1.0: 2006-12-05
    Type: Initial release
  • Version 1.1: 2008-02-20
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2017-10-18
    Type: Refinement description