Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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

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

Macromolecule Content

• Total Structure Weight: 21.39 kDa 
• Atom Count: 1361 
• Residue Count: 172 
• Unique protein chains: 1

1FHA

SOLVING THE STRUCTURE OF HUMAN H FERRITIN BY GENETICALLY ENGINEERING INTERMOLECULAR CRYSTAL CONTACTS

• DOI: 10.2210/pdb1FHA/pdb

• Classification: METAL BINDING PROTEIN
• Organism(s): Homo sapiens
• Mutation(s): No 


• Deposited: 1990-12-20 Released: 1992-07-15 
• Deposition Author(s): Artymiuk, P.J., Harrison, P.M.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Observed: 0.205 

Literature

Solving the structure of human H ferritin by genetically engineering intermolecular crystal contacts.

Lawson, D.M., Artymiuk, P.J., Yewdall, S.J., Smith, J.M., Livingstone, J.C., Treffry, A., Luzzago, A., Levi, S., Arosio, P., Cesareni, G., Thomas, C.D., Shaw, W.V., Harrison, P.M.

(1991) Nature 349: 541-544

• PubMed: 1992356 
• DOI: 10.1038/349541a0
• Primary Citation of Related Structures:  
  1FHA


• PubMed Abstract: 
  

Ferritin is important in iron homeostasis. Its twenty-four chains of two types, H and L, assemble as a hollow shell providing an iron-storage cavity. Ferritin molecules in cells containing high levels of iron tend to be rich in L chains, and may have a long-term storage function, whereas H-rich ferritins are more active in iron metabolism. The molecular basis for the greater activity of H-rich ferritins has until now been obscure, largely because the structure of H-chain ferritin has remained unknown owing to the difficulties in obtaining crystals ordered enough for X-ray crystallographic analysis. Here we report the three-dimensional structure of a human ferritin H-chain homopolymer. By genetically engineering a change in the sequence of the intermolecular contact region, we obtained crystals isomorphous with the homologous rat L ferritin and of high enough quality for X-ray diffraction analysis. The X-ray structure of human H ferritin shows a novel metal site embedded within each of its four-helix bundles and we suggest that ferroxidase activity associated with this site accounts for its rapid uptake of iron.

---

Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
FERRITIN	A	183	Homo sapiens	Mutation(s): 0  Gene Names: FTH1, FTH, FTHL6, OK/SW-cl.84, PIG15 EC: 1.16.3.1
Find proteins for P02794 (Homo sapiens) Explore P02794  Go to UniProtKB:  P02794
NIH Common Fund Data Resources
PHAROS  P02794 GTEx  ENSG00000167996

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FE	A	FE (III) ION Fe VTLYFUHAOXGGBS-UHFFFAOYSA-N
CA	A	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Observed: 0.205 
• Space Group: F 4 3 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 184.8	α = 90
b = 184.8	β = 90
c = 184.8	γ = 90

Software Package:

Software Name	Purpose
PROLSQ	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1990-12-20 
• Released Date: 1992-07-15 
Deposition Author(s): Artymiuk, P.J., Harrison, P.M.

Revision History 

• Version 1.0: 1992-07-15
  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
• Version 1.3: 2011-11-16
  Changes: Atomic model
• Version 1.4: 2012-02-29
  Changes: Database references