Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

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

Macromolecule Content

• Total Structure Weight: 63.37 kDa 
• Atom Count: 5032 
• Residue Count: 556 
• Unique protein chains: 1

1IAT

CRYSTAL STRUCTURE OF HUMAN PHOSPHOGLUCOSE ISOMERASE/NEUROLEUKIN/AUTOCRINE MOTILITY FACTOR/MATURATION FACTOR

• DOI: 10.2210/pdb1IAT/pdb

• Classification: ISOMERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2001-03-23 Released: 2001-05-30 
• Deposition Author(s): Read, J.A., Pearce, J., Li, X., Muirhead, H., Chirgwin, J., Davies, C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.62 Å
• R-Value Free: 0.170 
• R-Value Work: 0.144 
• R-Value Observed: 0.147 

Literature

The crystal structure of human phosphoglucose isomerase at 1.6 A resolution: implications for catalytic mechanism, cytokine activity and haemolytic anaemia.

Read, J., Pearce, J., Li, X., Muirhead, H., Chirgwin, J., Davies, C.

(2001) J Mol Biol 309: 447-463

• PubMed: 11371164 
• DOI: 10.1006/jmbi.2001.4680
• Structures With Same Primary Citation


• PubMed Abstract: 
  

Phosphoglucose isomerase (PGI) is a multifunctional protein, which, inside the cell, functions as a housekeeping enzyme of glycolysis and gluconeogenesis and, outside the cell, exerts wholly unrelated cytokine properties. We have determined the structure of human PGI to a resolution of 1.6 A using X-ray crystallography. The structure is highly similar to other PGIs, especially the architecture of the active site. Fortuitous binding of a sulphate molecule from the crystallisation solution has facilitated an accurate description of the substrate phosphate-binding site. Comparison with both native and inhibitor-bound rabbit PGI structures shows that two loops move closer to the active site upon binding inhibitor. Interestingly, the human structure most closely resembles the inhibitor-bound structure, suggesting that binding of the phosphate moiety of the substrate may trigger this conformational change. We suggest a new mechanism for catalysis that uses Glu357 as the base catalyst for the isomerase reaction rather than His388 as proposed previously. The human PGI structure has also provided a detailed framework with which to map mutations associated with non-spherocytic haemolytic anaemia.

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Organizational Affiliation: 

School of Medical Sciences, University of Bristol, Bristol BS8 1TD, UK.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
PHOSPHOGLUCOSE ISOMERASE	A	557	Homo sapiens	Mutation(s): 0  Gene Names: GPI EC: 5.3.1.9
Find proteins for P06744 (Homo sapiens) Go to UniProtKB:  P06744
NIH Common Fund Data Resources
PHAROS  P06744 GTEx  ENSG00000105220

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	A	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
BME	A	BETA-MERCAPTOETHANOL C2 H6 O S DGVVWUTYPXICAM-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.62 Å
• R-Value Free: 0.170 
• R-Value Work: 0.144 
• R-Value Observed: 0.147 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 94.183	α = 90
b = 94.183	β = 90
c = 136.138	γ = 90

Software Package:

Software Name	Purpose
AMoRE	phasing
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2001-03-23 
• Released Date: 2001-05-30 
Deposition Author(s): Read, J.A., Pearce, J., Li, X., Muirhead, H., Chirgwin, J., Davies, C.

Revision History 

• Version 1.0: 2001-05-30
  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