Biological Assembly 1  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

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

Biological Assembly 2  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 88.18 kDa 
• Atom Count: 6099 
• Residue Count: 742 
• Unique protein chains: 2

1A6Z

HFE (HUMAN) HEMOCHROMATOSIS PROTEIN

• DOI: 10.2210/pdb1A6Z/pdb

• Classification: MHC CLASS I COMPLEX
• Organism(s): Homo sapiens
• Expression System: Cricetulus griseus
• Mutation(s): No 


• Deposited: 1998-03-04 Released: 1999-03-23 
• Deposition Author(s): Lebron, J.A., Bennett, M.J., Vaughn, D.E., Chirino, A.J., Snow, P.M., Mintier, G.A., Feder, J.N., Bjorkman, P.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.277 
• R-Value Work: 0.233 
• R-Value Observed: 0.233 

Literature

Crystal structure of the hemochromatosis protein HFE and characterization of its interaction with transferrin receptor.

Lebron, J.A., Bennett, M.J., Vaughn, D.E., Chirino, A.J., Snow, P.M., Mintier, G.A., Feder, J.N., Bjorkman, P.J.

(1998) Cell 93: 111-123

• PubMed: 9546397 
• DOI: 10.1016/s0092-8674(00)81151-4
• Primary Citation of Related Structures:  
  1A6Z


• PubMed Abstract: 
  

HFE is an MHC-related protein that is mutated in the iron-overload disease hereditary hemochromatosis. HFE binds to transferrin receptor (TfR) and reduces its affinity for iron-loaded transferrin, implicating HFE in iron metabolism. The 2.6 A crystal structure of HFE reveals the locations of hemochromatosis mutations and a patch of histidines that could be involved in pH-dependent interactions. We also demonstrate that soluble TfR and HFE bind tightly at the basic pH of the cell surface, but not at the acidic pH of intracellular vesicles. TfR:HFE stoichiometry (2:1) differs from TfR:transferrin stoichiometry (2:2), implying a different mode of binding for HFE and transferrin to TfR, consistent with our demonstration that HFE, transferrin, and TfR form a ternary complex.

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Organizational Affiliation: 

Division of Biology, California Institute of Technology, Pasadena 91125, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HFE	A, C	275	Homo sapiens	Mutation(s): 0  Gene Names: HFE, HLAH
Find proteins for Q30201 (Homo sapiens) Explore Q30201  Go to UniProtKB:  Q30201
NIH Common Fund Data Resources
PHAROS:  Q30201 GTEx:  ENSG00000010704

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
BETA-2-MICROGLOBULIN	B, D	99	Homo sapiens	Mutation(s): 0  Gene Names: B2M, CDABP0092, HDCMA22P
Find proteins for P61769 (Homo sapiens) Explore P61769  Go to UniProtKB:  P61769
NIH Common Fund Data Resources
PHAROS:  P61769 GTEx:  ENSG00000166710

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.277 
• R-Value Work: 0.233 
• R-Value Observed: 0.233 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 68.8	α = 90
b = 100.1	β = 90
c = 147.6	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing
X-PLOR	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1998-03-04 
• Released Date: 1999-03-23 
Deposition Author(s): Lebron, J.A., Bennett, M.J., Vaughn, D.E., Chirino, A.J., Snow, P.M., Mintier, G.A., Feder, J.N., Bjorkman, P.J.

Revision History 

• Version 1.0: 1999-03-23
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance