1CN4

ERYTHROPOIETIN COMPLEXED WITH EXTRACELLULAR DOMAINS OF ERYTHROPOIETIN RECEPTOR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.336 
  • R-Value Work: 0.280 

wwPDB Validation 3D Report Full Report


This is version 1.3 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

  • 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.


    Related Citations: 
    • Engineering a Soluble Extracellular Erythropoietin Receptor (EPObp) in Pichia pastoris to Eliminate Microheterogeneity, and its Complex with Erythropoietin
      Zhan, H.,Liu, B.,Reid, S.W.,Aoki, K.H.,Li, C.,Syed, R.S.,Karkaria, C.,Koe, G.,Sitney, K.,Hayenga, K.,Mistry, F.,Savel, L.,Dreyer, M.,Katz, B.,Schreurs, J.,Matthews, D.J.,Cheetham, J.C.,Egrie, J.,Giebel, L.B.,Stroud, R.M.
      (1999) Protein Eng. 12: 505


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (ERYTHROPOIETIN RECEPTOR)
A, B
228Homo sapiensGene Names: EPOR
Find proteins for P19235 (Homo sapiens)
Go to Gene View: EPOR
Go to UniProtKB:  P19235
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (ERYTHROPOIETIN)
C
166Homo sapiensGene Names: EPO
Find proteins for P01588 (Homo sapiens)
Go to Gene View: EPO
Go to UniProtKB:  P01588
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.336 
  • R-Value Work: 0.280 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 73.340α = 90.00
b = 80.340β = 90.00
c = 134.900γ = 90.00
Software Package:
Software NamePurpose
MLPHAREphasing
bioteXdata reduction
SOLOMONphasing
CNSrefinement
bioteXdata collection
bioteXdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 1999-05-25 
  • Released Date: 1999-08-11 
  • Deposition Author(s): Stroud, R.M., Reid, S.W.
  • This entry supersedes: 1BLW

Revision History 

  • Version 1.0: 1999-08-11
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-04
    Type: Refinement description