Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Octahedral - O  (3D View)
Global Stoichiometry: Homo 24-mer - A24 

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

Macromolecule Content

• Total Structure Weight: 20.53 kDa 
• Atom Count: 1445 
• Modelled Residue Count: 170 
• Deposited Residue Count: 174 
• Unique protein chains: 1

1AEW

L-CHAIN HORSE APOFERRITIN

• DOI: 10.2210/pdb1AEW/pdb

• Classification: IRON STORAGE
• Organism(s): Equus caballus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1997-02-26 Released: 1997-09-04 
• Deposition Author(s): Hempstead, P.D., Yewdall, S.J., Lawson, D.M., Harrison, P.M., Artymiuk, P.J.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Work: 0.192 
• R-Value Observed: 0.192 

Literature

Comparison of the three-dimensional structures of recombinant human H and horse L ferritins at high resolution.

Hempstead, P.D., Yewdall, S.J., Fernie, A.R., Lawson, D.M., Artymiuk, P.J., Rice, D.W., Ford, G.C., Harrison, P.M.

(1997) J Mol Biol 268: 424-448

• PubMed: 9159481 
• DOI: 10.1006/jmbi.1997.0970
• Primary Citation of Related Structures:  
  1AEW, 2FHA


• PubMed Abstract: 
  

Mammalian ferritins are 24-mers assembled from two types of polypeptide chain which provide the molecule with different functions. H(eavy) chains catalyse the first step in iron storage, the oxidation of iron(II). L(ight) chains promote the nucleation of the mineral ferrihydrite enabling storage of iron(III) inside the protein shell. We report here the comparison of the three-dimensional structures of recombinant human H chain (HuHF) and horse L chain (HoLF) ferritin homopolymers, which have been refined at 1.9 A resolution. There is 53% sequence identity between these molecules, and the two structures are very similar, the H and L subunit alpha-carbons superposing to within 0.5 A rms deviation with 41 water molecules in common. Nevertheless, there are significant important differences which can be related to differences in function. In particular, the centres of the four-helix bundles contain distinctive groups of hydrophilic residues which have been associated with ferroxidase activity in H chains and enhanced stability in L chains. L chains contain a group of glutamates associated with mineralisation within the iron storage cavity of the protein.

---

Organizational Affiliation: 

Krebs Institute for Biomolecular Research, Department of Molecular Biology and Biotechnology, University of Sheffield, England.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
FERRITIN	A	174	Equus caballus	Mutation(s): 0  Gene Names: FTL
Find proteins for P02791 (Equus caballus) Explore P02791  Go to UniProtKB:  P02791

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CD	A	CADMIUM ION Cd WLZRMCYVCSSEQC-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Work: 0.192 
• R-Value Observed: 0.192 
• Space Group: F 4 3 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 184	α = 90
b = 184	β = 90
c = 184	γ = 90

Software Package:

Software Name	Purpose
TNT	refinement
MOSFLM	data reduction
CCP4	data scaling
ROTAVATA)	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-02-26 
• Released Date: 1997-09-04 
Deposition Author(s): Hempstead, P.D., Yewdall, S.J., Lawson, D.M., Harrison, P.M., Artymiuk, P.J.

Revision History  

• Version 1.0: 1997-09-04
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Derived calculations, Version format compliance