1EER

CRYSTAL STRUCTURE OF HUMAN ERYTHROPOIETIN COMPLEXED TO ITS RECEPTOR AT 1.9 ANGSTROMS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.318 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.242 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Efficiency of signalling through cytokine receptors depends critically on receptor orientation.

Syed, R.S.Reid, S.W.Li, C.Cheetham, J.C.Aoki, K.H.Liu, B.Zhan, H.Osslund, T.D.Chirino, A.J.Zhang, J.Finer-Moore, J.Elliott, S.Sitney, K.Katz, B.A.Matthews, D.J.Wendoloski, J.J.Egrie, J.Stroud, R.M.

(1998) Nature 395: 511-516

  • DOI: 10.1038/26773
  • Primary Citation of Related Structures:  
    1EER, 1CN4

  • PubMed Abstract: 
  • Human erythropoietin is a haematopoietic cytokine required for the differentiation and proliferation of precursor cells into red blood cells. It activates cells by binding and orientating two cell-surface erythropoietin receptors (EPORs) which trigge ...

    Human erythropoietin is a haematopoietic cytokine required for the differentiation and proliferation of precursor cells into red blood cells. It activates cells by binding and orientating two cell-surface erythropoietin receptors (EPORs) which trigger an intracellular phosphorylation cascade. The half-maximal response in a cellular proliferation assay is evoked at an erythropoietin concentration of 10 pM, 10(-2) of its Kd value for erythropoietin-EPOR binding site 1 (Kd approximately equal to nM), and 10(-5) of the Kd for erythropoietin-EPOR binding site 2 (Kd approximately equal to 1 microM). Overall half-maximal binding (IC50) of cell-surface receptors is produced with approximately 0.18 nM erythropoietin, indicating that only approximately 6% of the receptors would be bound in the presence of 10 pM erythropoietin. Other effective erythropoietin-mimetic ligands that dimerize receptors can evoke the same cellular responses but much less efficiently, requiring concentrations close to their Kd values (approximately 0.1 microM). The crystal structure of erythropoietin complexed to the extracellular ligand-binding domains of the erythropoietin receptor, determined at 1.9 A from two crystal forms, shows that erythropoietin imposes a unique 120 degrees angular relationship and orientation that is responsible for optimal signalling through intracellular kinase pathways.


    Organizational Affiliation

    Amgen Inc., Thousand Oaks, California 91320-1789, USA. rsyed@amgen.com



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ERYTHROPOIETINA166Homo sapiensMutation(s): 5 
Gene Names: EPO
Find proteins for P01588 (Homo sapiens)
Explore P01588 
Go to UniProtKB:  P01588
NIH Common Fund Data Resources
PHAROS  P01588
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
ERYTHROPOIETIN RECEPTORBC227Homo sapiensMutation(s): 3 
Gene Names: EPOR
Find proteins for P19235 (Homo sapiens)
Explore P19235 
Go to UniProtKB:  P19235
NIH Common Fund Data Resources
PHAROS  P19235
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.318 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.242 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.4α = 90
b = 79.3β = 90
c = 136.5γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASESphasing
X-PLORrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 1998-07-24 
  • Released Date: 1999-10-01 
  • Deposition Author(s): Syed, R.S., Li, C.

Revision History 

  • Version 1.0: 1999-10-01
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance