Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 36784.80 
• Atom Count: 2569 
• Residue Count: 323 
• Unique protein chains: 1

1AII

ANNEXIN III

• DOI: 10.2210/pdb1AII/pdb

• Classification: CALCIUM/PHOSPHOLIPID BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli


• Deposited: 1996-11-28 Released: 1997-03-12 
• Deposition Author(s): Lewit-Bentley, A., Perron, B.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free: 0.237 
• R-Value Work: 0.193 

Literature

Can enzymatic activity, or otherwise, be inferred from structural studies of annexin III?

Perron, B., Lewit-Bentley, A., Geny, B., Russo-Marie, F.

(1997) J.Biol.Chem. 272: 11321-11326

• PubMed: 9111038 


• PubMed Abstract: 
  

Annexin III, a putative inositol (1,2)-phosphohydrolase, was co-crystallized with inositol 2-phosphate, the inhibitor of the reaction, and its structure was solved to 1.95 A resolution. No enzyme active site was observed in the structure. Assays for enzymatic activity were also negative. Search for annexin III-inositol phosphate interactions using the BIAcoreTM system revealed an affinity for inositol cyclic (1,2)-phosphate, suggesting annexin III may sequester the molecule in the cell. The BIAcoreTM system used with different phospholipids showed that annexin III displays specificity for phosphatidylethanolamine, but not for phosphatidylinositols. Interestingly, a molecule of ethanolamine was found bound to the protein in the crystal structure. Coupled with the fact that this is a particularly abundant phospholipid in granules specific to neutrophils, cells where annexin III is highly expressed, our finding could be pointing to a physiological role of annexin III.

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Organizational Affiliation: 

Institut Cochin de Génétique Moléculaire, U332 INSERM, 22 rue Méchain, 75014 Paris, France.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
ANNEXIN III	A	323	Homo sapiens	Mutation(s): 0  Gene Names: ANXA3 (ANX3)
Find proteins for P12429 (Homo sapiens) Go to Gene View: ANXA3 Go to UniProtKB:  P12429

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
SO4	A	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
CA	A	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N
ETA	A	ETHANOLAMINE C2 H7 N O HZAXFHJVJLSVMW-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free: 0.237 
• R-Value Work: 0.193 
• Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 42.290	α = 90.00
b = 68.720	β = 94.27
c = 50.590	γ = 90.00

Software Package:

Software Name	Purpose
AMoRE	phasing
CCP4	data reduction
CCP4	data scaling
PROLSQ	refinement
MOSFLM	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1996-11-28 
• Released Date: 1997-03-12 
• Deposition Author(s): Lewit-Bentley, A., Perron, B.

Revision History 

• Version 1.0: 1997-03-12
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance