3PDB

Crystal structure of mouse mitochondrial aspartate aminotransferase in complex with oxaloacetic acid


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.177 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Biochemical and structural characterization of mouse mitochondrial aspartate aminotransferase, a newly identified kynurenine aminotransferase-IV.

Han, Q.Robinson, H.Cai, T.Tagle, D.A.Li, J.

(2011) Biosci.Rep. 31: 323-332

  • DOI: 10.1042/BSR20100117
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Mammalian mAspAT (mitochondrial aspartate aminotransferase) is recently reported to have KAT (kynurenine aminotransferase) activity and plays a role in the biosynthesis of KYNA (kynurenic acid) in rat, mouse and human brains. This study concerns the ...

    Mammalian mAspAT (mitochondrial aspartate aminotransferase) is recently reported to have KAT (kynurenine aminotransferase) activity and plays a role in the biosynthesis of KYNA (kynurenic acid) in rat, mouse and human brains. This study concerns the biochemical and structural characterization of mouse mAspAT. In this study, mouse mAspAT cDNA was amplified from mouse brain first stand cDNA and its recombinant protein was expressed in an Escherichia coli expression system. Sixteen oxo acids were tested for the co-substrate specificity of mouse mAspAT and 14 of them were shown to be capable of serving as co-substrates for the enzyme. Structural analysis of mAspAT by macromolecular crystallography revealed that the cofactor-binding residues of mAspAT are similar to those of other KATs. The substrate-binding residues of mAspAT are slightly different from those of other KATs. Our results provide a biochemical and structural basis towards understanding the overall physiological role of mAspAT in vivo and insight into controlling the levels of endogenous KYNA through modulation of the enzyme in the mouse brain.


    Organizational Affiliation

    Department of Biochemistry, Virginia Tech, Blacksburg, VA 24061, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Aspartate aminotransferase, mitochondrial
A, C
401Mus musculusMutation(s): 0 
Gene Names: Got2 (Got-2)
EC: 2.6.1.1, 2.6.1.7
Find proteins for P05202 (Mus musculus)
Go to UniProtKB:  P05202
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Aspartate aminotransferase, mitochondrial
B, D
401Mus musculusMutation(s): 0 
Gene Names: Got2 (Got-2)
EC: 2.6.1.1, 2.6.1.7
Find proteins for P05202 (Mus musculus)
Go to UniProtKB:  P05202
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, C, D
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
BME
Query on BME

Download SDF File 
Download CCD File 
A, B, C, D
BETA-MERCAPTOETHANOL
C2 H6 O S
DGVVWUTYPXICAM-UHFFFAOYSA-N
 Ligand Interaction
OAA
Query on OAA

Download SDF File 
Download CCD File 
B
OXALOACETATE ION
C4 H3 O5
KHPXUQMNIQBQEV-UHFFFAOYSA-M
 Ligand Interaction
PMP
Query on PMP

Download SDF File 
Download CCD File 
B, D
4'-DEOXY-4'-AMINOPYRIDOXAL-5'-PHOSPHATE
PYRIDOXAMINE-5'-PHOSPHATE
C8 H13 N2 O5 P
ZMJGSOSNSPKHNH-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
LLP
Query on LLP
A, C
L-PEPTIDE LINKINGC14 H22 N3 O7 PLYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.177 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 282.418α = 90.00
b = 77.894β = 90.00
c = 87.389γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
HKL-2000data reduction
REFMACrefinement
HKL-2000data collection
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-11-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance