3HPN

Ligand recognition by A-class EPH receptors: crystal structures of the EPHA2 ligand-binding domain and the EPHA2/EPHRIN-A1 complex

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.52 Å
  • R-Value Free: 0.307 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.236 

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Literature

Ligand recognition by A-class Eph receptors: crystal structures of the EphA2 ligand-binding domain and the EphA2/ephrin-A1 complex.

Himanen, J.P., Goldgur, Y., Miao, H., Myshkin, E., Guo, H., Buck, M., Nguyen, M., Rajashankar, K.R., Wang, B., Nikolov, D.B.

(2009) EMBO Rep 10: 722-728

  • DOI: 10.1038/embor.2009.91
  • Primary Citation of Related Structures:  
    3HEI, 3HPN

  • PubMed Abstract: 

    • Ephrin (Eph) receptor tyrosine kinases fall into two subclasses (A and B) according to preferences for their ephrin ligands. All published structural studies of Eph receptor/ephrin complexes involve B-class receptors. Here, we present the crystal structu ...

    Ephrin (Eph) receptor tyrosine kinases fall into two subclasses (A and B) according to preferences for their ephrin ligands. All published structural studies of Eph receptor/ephrin complexes involve B-class receptors. Here, we present the crystal structures of an A-class complex between EphA2 and ephrin-A1 and of unbound EphA2. Although these structures are similar overall to their B-class counterparts, they reveal important differences that define subclass specificity. The structures suggest that the A-class Eph receptor/ephrin interactions involve smaller rearrangements in the interacting partners, better described by a 'lock-and-key'-type binding mechanism, in contrast to the 'induced fit' mechanism defining the B-class molecules. This model is supported by structure-based mutagenesis and by differential requirements for ligand oligomerization by the two subclasses in cell-based Eph receptor activation assays. Finally, the structure of the unligated receptor reveals a homodimer assembly that might represent EphA2-specific homotypic cell adhesion interactions.

    Organizational Affiliation: 

    Structural Biology Program, Memorial Sloan-Kettering Cancer Center, New York, New York 10021, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ephrin type-A receptor 2 A, B, C, D, E, F174Homo sapiensMutation(s): 0 
Gene Names: EPHA2, ECK
EC: 2.7.10.1
Find proteins for P29317 (Homo sapiens)
Explore P29317 
Go to UniProtKB:  P29317
NIH Common Fund Data Resources
PHAROS:  P29317
GTEx:  ENSG00000142627
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.52 Å
  • R-Value Free: 0.307 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.236 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41.271α = 117.14
b = 91.187β = 97.27
c = 91.132γ = 100.79
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-06-30
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Derived calculations, Version format compliance