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 

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

  • 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tumor necrosis factor receptor superfamily member 6
A, C, E, G, I, K, M, O
115Homo sapiensGene Names: FAS (APT1, FAS1, TNFRSF6)
Find proteins for P25445 (Homo sapiens)
Go to Gene View: FAS
Go to UniProtKB:  P25445
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Protein FADD
B, D, F, H, J, L, N, P
122Homo sapiensGene Names: FADD (MORT1)
Find proteins for Q13158 (Homo sapiens)
Go to Gene View: FADD
Go to UniProtKB:  Q13158
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
A, B, E, H, J, K, M, P
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, C, E, G, I, J, K, M, O
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 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 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 126.218α = 90.00
b = 126.218β = 90.00
c = 299.274γ = 120.00
Software Package:
Software NamePurpose
ADSCdata collection
SCALAdata scaling
SOLVEphasing
REFMACrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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