Crystal structure of EDA-A1

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.201 

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This is version 1.5 of the entry. See complete history


The crystal structures of EDA-A1 and EDA-A2: splice variants with distinct receptor specificity.

Hymowitz, S.G.Compaan, D.M.Yan, M.Wallweber, H.J.Dixit, V.M.Starovasnik, M.A.de Vos, A.M.

(2003) Structure 11: 1513-1520

  • DOI: https://doi.org/10.1016/j.str.2003.11.009
  • Primary Citation of Related Structures:  
    1RJ7, 1RJ8

  • PubMed Abstract: 

    EDA is a tumor necrosis factor family member involved in ectodermal development. Splice variants EDA-A1 and EDA-A2 differ only by the presence of Glu 308 and Val 309 in the expected receptor binding region of EDA-A1 but not EDA-A2. This two amino acid difference functions as a switch controlling receptor specificity. EDA-A1 binds only to EDAR, while EDA-A2 is specific for XEDAR. In order to understand the structural basis of this switch, we determined the X-ray crystal structures of the TNF domain of both EDA-A1 and EDA-A2 at 2.3 A and 2.2 A, respectively. While the backbone conformation around the splice difference is similar in both isoforms, the conformation of the following loop, the surface charge, and the shape of the expected receptor binding site differ significantly.

  • Organizational Affiliation

    Department of Protein Engineering, Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, USA. hymowitz@gene.com

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Ectodysplasin A163Homo sapiensMutation(s): 0 
Gene Names: ED1EDAEDA2
UniProt & NIH Common Fund Data Resources
Find proteins for Q92838 (Homo sapiens)
Explore Q92838 
Go to UniProtKB:  Q92838
PHAROS:  Q92838
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ92838
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.201 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.657α = 90
b = 279.687β = 91.36
c = 54.175γ = 90
Software Package:
Software NamePurpose
MAR345data collection
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-12-09
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2011-10-19
    Changes: Database references
  • Version 1.4: 2017-10-11
    Changes: Refinement description
  • Version 1.5: 2023-08-23
    Changes: Data collection, Database references, Refinement description