1AII | pdb_00001aii

ANNEXIN III

• PDB DOI: https://doi.org/10.2210/pdb1AII/pdb

• Classification: CALCIUM/PHOSPHOLIPID BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• 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 (Depositor), 0.171 (DCC) 
• R-Value Work: 
  0.193 (Depositor), 0.166 (DCC) 
• R-Value Observed: 
  0.196 (Depositor) 

Starting Model: experimental

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 Biological Chem 272: 11321-11326

• PubMed: 9111038 
• DOI: https://doi.org/10.1074/jbc.272.17.11321
• Primary Citation Related Structures: 
  1AII


• 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.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 36.78 kDa 
• Atom Count: 2,802 
• Modeled Residue Count: 322 
• Deposited Residue Count: 323 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ANNEXIN III	A	323	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P12429 (Homo sapiens) Explore P12429  Go to UniProtKB:  P12429
PHAROS:  P12429 GTEx:  ENSG00000138772

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	G [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
ETA	H [auth A]	ETHANOLAMINE C2 H7 N O HZAXFHJVJLSVMW-UHFFFAOYSA-N
CA	B [auth A], C [auth A], D [auth A], E [auth A], F [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free:  0.237 (Depositor), 0.171 (DCC) 
• R-Value Work:  0.193 (Depositor), 0.166 (DCC) 
• R-Value Observed: 0.196 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 42.29	α = 90
b = 68.72	β = 94.27
c = 50.59	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• 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
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2023-08-02
  Changes: Database references, Derived calculations, Refinement description
• Version 2.0: 2023-11-15
  Changes: Atomic model, Data collection