1B0X

THE CRYSTAL STRUCTURE OF AN EPH RECEPTOR SAM DOMAIN REVEALS A MECHANISM FOR MODULAR DIMERIZATION.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.229 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The crystal structure of an Eph receptor SAM domain reveals a mechanism for modular dimerization.

Stapleton, D.Balan, I.Pawson, T.Sicheri, F.

(1999) Nat Struct Biol 6: 44-49

  • DOI: 10.1038/4917
  • Primary Citation of Related Structures:  
    1B0X

  • PubMed Abstract: 
  • The sterile alpha motif (SAM) domain is a novel protein module of approximately 70 amino acids that is found in a variety of signaling molecules including tyrosine and serine/threonine protein kinases, cytoplasmic scaffolding and adaptor proteins, regulators of lipid metabolism, and GTPases as well as members of the ETS family of transcription factors ...

    The sterile alpha motif (SAM) domain is a novel protein module of approximately 70 amino acids that is found in a variety of signaling molecules including tyrosine and serine/threonine protein kinases, cytoplasmic scaffolding and adaptor proteins, regulators of lipid metabolism, and GTPases as well as members of the ETS family of transcription factors. The SAM domain can potentially function as a protein interaction module through the ability to homo- and hetero-oligomerize with other SAM domains. This functional property elicits the oncogenic activation of chimeric proteins arising from translocation of the SAM domain of TEL to coding regions of the betaPDGF receptor, Abl, JAK2 protein kinase and the AML1 transcription factor. Here we describe the 2.0 A X-ray crystal structure of a SAM domain homodimer from the intracellular region of the EphA4 receptor tyrosine kinase. The structure reveals a mode of dimerization that we predict is shared amongst the SAM domains of the Eph receptor tyrosine kinases and possibly other SAM domain containing proteins. These data indicate a mechanism through which an independently folding protein module can form homophilic complexes that regulate signaling events at the membrane and in the nucleus.


    Organizational Affiliation

    Program in Molecular Biology and Cancer, Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (EPHA4 RECEPTOR TYROSINE KINASE)A94Mus musculusMutation(s): 0 
Gene Names: Epha4SekSek1
EC: 2.7.10.1
UniProt
Find proteins for Q03137 (Mus musculus)
Explore Q03137 
Go to UniProtKB:  Q03137
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.229 
  • Space Group: P 64
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.14α = 90
b = 77.14β = 90
c = 24.37γ = 120
Software Package:
Software NamePurpose
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-05-03
    Type: Initial release
  • Version 1.1: 2008-04-26
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance