2CST

CRYSTAL STRUCTURE OF THE CLOSED FORM OF CHICKEN CYTOSOLIC ASPARTATE AMINOTRANSFERASE AT 1.9 ANGSTROMS RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Observed: 0.175 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Crystal structure of the closed form of chicken cytosolic aspartate aminotransferase at 1.9 A resolution.

Malashkevich, V.N.Strokopytov, B.V.Borisov, V.V.Dauter, Z.Wilson, K.S.Torchinsky, Y.M.

(1995) J Mol Biol 247: 111-124

  • DOI: 10.1006/jmbi.1994.0126
  • Primary Citation of Related Structures:  
    2CST

  • PubMed Abstract: 
  • The crystal structure of chicken cytosolic aspartate aminotransferase (cAATase; EC 2.6.1.1) has been solved and refined at 1.9 A resolution. Orthorhombic crystals, space group P2(1)2(1)2(1), a = 56.4 A, b = 126.0 A and c = 142.3 A, were grown from polyethylene glycol solutions in the presence of maleate, a dicarboxylic inhibitor that forms a Michaelis-like complex ...

    The crystal structure of chicken cytosolic aspartate aminotransferase (cAATase; EC 2.6.1.1) has been solved and refined at 1.9 A resolution. Orthorhombic crystals, space group P2(1)2(1)2(1), a = 56.4 A, b = 126.0 A and c = 142.3 A, were grown from polyethylene glycol solutions in the presence of maleate, a dicarboxylic inhibitor that forms a Michaelis-like complex. The pyridoxal form of the enzyme was used for crystallization. Diffraction data were collected using synchrotron radiation. The structure of the new orthorhombic crystal form was solved by molecular replacement using the partially refined 2.8 A resolution structure of the high-salt crystal form as a search model. The final value of the crystallographic R-factor after rigid body and restrained least-squares refinement is 0.175 with very good model geometry. The two 2-fold-related subunits of cAATase have distinct environments in the crystal lattice. Domain movement is strictly hindered by the lattice contacts in one subunit, while the second one possesses conformational freedom. Despite their different environments, both subunits were found in the closed conformation with one maleate molecule tightly bound in each active site. The present study allows a detailed comparison of the highly refined structures of the aspartate aminotransferase isozymes, and thus provide better insight into the role of conserved and variable residues in substrate recognition and catalysis.


    Related Citations: 
    • Three-Dimensional Structure of the Complex of Chicken Cytosolic Aspartate Aminotransferase with 2-Oxoglutarate
      Harutyunyan, E.G., Malashkevich, V.N., Kochkina, V.M., Torchinsky, Y.M.
      (1985) Transaminases --: 164

    Organizational Affiliation

    Institute of Molecular Biology, Academy of Sciences of the Russia, Moscow.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ASPARTATE AMINOTRANSFERASEA, B411Gallus gallusMutation(s): 0 
Gene Names: GOT1
EC: 2.6.1.1 (PDB Primary Data), 2.6.1.3 (UniProt)
UniProt
Find proteins for P00504 (Gallus gallus)
Explore P00504 
Go to UniProtKB:  P00504
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PLP (Subject of Investigation/LOI)
Query on PLP

Download Ideal Coordinates CCD File 
C [auth A], E [auth B]PYRIDOXAL-5'-PHOSPHATE
C8 H10 N O6 P
NGVDGCNFYWLIFO-UHFFFAOYSA-N
 Ligand Interaction
MAE
Query on MAE

Download Ideal Coordinates CCD File 
D [auth A], F [auth B]MALEIC ACID
C4 H4 O4
VZCYOOQTPOCHFL-UPHRSURJSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Observed: 0.175 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.4α = 90
b = 126β = 90
c = 124.3γ = 90
Software Package:
Software NamePurpose
TNTrefinement

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1994-11-30
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.3: 2017-11-29
    Changes: Derived calculations, Other