3EZQ

Crystal Structure of the Fas/FADD Death Domain Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.73 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.236 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The Fas-FADD death domain complex structure unravels signalling by receptor clustering

Scott, F.L.Stec, B.Pop, C.Dobaczewska, M.K.Lee, J.J.Monosov, E.Robinson, H.Salvesen, G.S.Schwarzenbacher, R.Riedl, S.J.

(2009) Nature 457: 1019-1022

  • DOI: 10.1038/nature07606
  • Primary Citation of Related Structures:  
    3EZQ

  • PubMed Abstract: 
  • The death inducing signalling complex (DISC) formed by Fas receptor, FADD (Fas-associated death domain protein) and caspase 8 is a pivotal trigger of apoptosis. The Fas-FADD DISC represents a receptor platform, which once assembled initiates the indu ...

    The death inducing signalling complex (DISC) formed by Fas receptor, FADD (Fas-associated death domain protein) and caspase 8 is a pivotal trigger of apoptosis. The Fas-FADD DISC represents a receptor platform, which once assembled initiates the induction of programmed cell death. A highly oligomeric network of homotypic protein interactions comprised of the death domains of Fas and FADD is at the centre of DISC formation. Thus, characterizing the mechanistic basis for the Fas-FADD interaction is crucial for understanding DISC signalling but has remained unclear largely because of a lack of structural data. We have successfully formed and isolated the human Fas-FADD death domain complex and report the 2.7 A crystal structure. The complex shows a tetrameric arrangement of four FADD death domains bound to four Fas death domains. We show that an opening of the Fas death domain exposes the FADD binding site and simultaneously generates a Fas-Fas bridge. The result is a regulatory Fas-FADD complex bridge governed by weak protein-protein interactions revealing a model where the complex itself functions as a mechanistic switch. This switch prevents accidental DISC assembly, yet allows for highly processive DISC formation and clustering upon a sufficient stimulus. In addition to depicting a previously unknown mode of death domain interactions, these results further uncover a mechanism for receptor signalling solely by oligomerization and clustering events.


    Organizational Affiliation

    Program in Apoptosis and Cell Death Research, The Burnham Institute for Medical Research, La Jolla, California 92037, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Tumor necrosis factor receptor superfamily member 6ACEGIKMO115Homo sapiensMutation(s): 0 
Gene Names: FASAPT1FAS1TNFRSF6
Find proteins for P25445 (Homo sapiens)
Explore P25445 
Go to UniProtKB:  P25445
NIH Common Fund Data Resources
PHAROS  P25445
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Protein FADDBDFHJLNP122Homo sapiensMutation(s): 0 
Gene Names: FADDMORT1GIG3
Find proteins for Q13158 (Homo sapiens)
Explore Q13158 
Go to UniProtKB:  Q13158
NIH Common Fund Data Resources
PHAROS  Q13158
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download CCD File 
A, C, E, G, I, J, K, M, O
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
NA
Query on NA

Download CCD File 
A, B, E, H, J, K, M, P
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.73 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.236 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 126.218α = 90
b = 126.218β = 90
c = 299.274γ = 120
Software Package:
Software NamePurpose
ADSCdata collection
SOLVEphasing
REFMACrefinement
HKL-2000data reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-12-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2011-07-20
    Changes: Refinement description