Biological Assembly 1  

 3D View: Structure | Electron Density

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

 3D View: Structure | Electron Density

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 182332.34 
• Atom Count: 12580 
• Residue Count: 1628 
• Unique protein chains: 1

5AX8

Recombinant expression, purification and preliminary crystallographic studies of the mature form of human mitochondrial aspartate aminotransferase

• DOI: 10.2210/pdb5AX8/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): 1 


• Deposited: 2015-07-20 Released: 2016-03-16 
• Deposition Author(s): Jiang, X., Wang, J., Chang, H., Zhou, Y.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.989 Å
• R-Value Free: 0.291 
• R-Value Work: 0.273 

Literature

Recombinant expression, purification and crystallographic studies of the mature form of human mitochondrial aspartate aminotransferase

Jiang, X., Wang, J., Chang, H., Zhou, Y.

(2016) Biosci Trends 10: 79-84

• PubMed: 26902786 
• DOI: 10.5582/bst.2015.01150


• PubMed Abstract: 
  

Mitochondrial aspartate aminotransferase (mAspAT) was recognized as a moonlighting enzyme because it has not only aminotransferase activity but also a high-affinity long-chain fatty acids (LCFA) binding site. This enzyme plays a key role in amino acid metabolism, biosynthesis of kynurenic acid and transport of the LCFA. Therefore, it is important to study the structure-function relationships of human mAspAT protein. In this work, the mature form of human mAspAT was expressed to a high level in Escherichia coli periplasmic space using pET-22b vector, purified by a combination of immobilized metal-affinity chromatography and cation exchange chromatography. Optimal activity of the enzyme occurred at a temperature of 47.5ºC and a pH of 8.5. Crystals of human mAspAT were grown using the hanging-drop vapour diffusion method at 277K with 0.1 M HEPES pH 6.8 and 25%(v/v) Jeffamine(®) ED-2001 pH 6.8. The crystals diffracted to 2.99 Å and belonged to the space group P1 with the unit-cell parameters a =56.7, b = 76.1, c = 94.2 Å, α =78.0, β =85.6, γ = 78.4º. Elucidation of mAspAT structure can provide a molecular basis towards understanding catalysis mechanism and substrate binding site of enzyme.

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Organizational Affiliation: 

School of Life Science and Biotechnology, Dalian University of Technology.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Aspartate aminotransferase, mitochondrial	A, B, C, D	407	Homo sapiens	Mutation(s): 1  Gene Names: GOT2 EC: 2.6.1.1, 2.6.1.7
Find proteins for P00505 (Homo sapiens) Go to Gene View: GOT2 Go to UniProtKB:  P00505

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.989 Å
• R-Value Free: 0.291 
• R-Value Work: 0.273 
• Space Group: P 1

Unit Cell:

Length (Å)	Angle (°)
a = 56.706	α = 78.00
b = 76.140	β = 85.65
c = 94.247	γ = 78.41

Software Package:

Software Name	Purpose
PHENIX	refinement
PHASER	phasing
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2015-07-20 
• Released Date: 2016-03-16 
• Deposition Author(s): Jiang, X., Wang, J., Chang, H., Zhou, Y.

Revision History 

• Version 1.0: 2016-03-16
  Type: Initial release
• Version 1.1: 2016-04-06
  Type: Database references