5JQE

Crystal structure of caspase8 tDED

  • Classification: HYDROLASE
  • Organism(s): Escherichia coli
  • Expression System: Escherichia coli BL21(DE3)
  • Mutation(s): No 

  • Deposited: 2016-05-04 Released: 2016-10-26 
  • Deposition Author(s): Fu, T., Li, Y., Lu, A., Wu, H.
  • Funding Organization(s): National Institutes of Health/Eunice Kennedy Shriver National Institute of Child Health & Human Development (NIH/NICHD), National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID), National Institutes of Health/National Institute of Biomedical Imaging and Bioengineering (NIH/NIBIB)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.16 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.219 

Starting Model: other
View more details

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Cryo-EM Structure of Caspase-8 Tandem DED Filament Reveals Assembly and Regulation Mechanisms of the Death-Inducing Signaling Complex.

Fu, T.M.Li, Y.Lu, A.Li, Z.Vajjhala, P.R.Cruz, A.C.Srivastava, D.B.DiMaio, F.Penczek, P.A.Siegel, R.M.Stacey, K.J.Egelman, E.H.Wu, H.

(2016) Mol Cell 64: 236-250

  • DOI: https://doi.org/10.1016/j.molcel.2016.09.009
  • Primary Citation of Related Structures:  
    5JQE, 5L08

  • PubMed Abstract: 

    Caspase-8 activation can be triggered by death receptor-mediated formation of the death-inducing signaling complex (DISC) and by the inflammasome adaptor ASC. Caspase-8 assembles with FADD at the DISC and with ASC at the inflammasome through its tandem death effector domain (tDED), which is regulated by the tDED-containing cellular inhibitor cFLIP and the viral inhibitor MC159. Here we present the caspase-8 tDED filament structure determined by cryoelectron microscopy. Extensive assembly interfaces not predicted by the previously proposed linear DED chain model were uncovered, and were further confirmed by structure-based mutagenesis in filament formation in vitro and Fas-induced apoptosis and ASC-mediated caspase-8 recruitment in cells. Structurally, the two DEDs in caspase-8 use quasi-equivalent contacts to enable assembly. Using the tDED filament structure as a template, structural analyses reveal the interaction surfaces between FADD and caspase-8 and the distinct mechanisms of regulation by cFLIP and MC159 through comingling and capping, respectively.


  • Organizational Affiliation

    Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA; Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Sugar ABC transporter substrate-binding protein,Caspase-8 chimera565Escherichia coliMutation(s): 0 
Gene Names: malEAC066_14980CASP8MCH5
EC: 3.4.22.61
UniProt & NIH Common Fund Data Resources
Find proteins for P0AEX9 (Escherichia coli (strain K12))
Explore P0AEX9 
Go to UniProtKB:  P0AEX9
Find proteins for Q14790 (Homo sapiens)
Explore Q14790 
Go to UniProtKB:  Q14790
PHAROS:  Q14790
GTEx:  ENSG00000064012 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsQ14790P0AEX9
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.16 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.219 
  • Space Group: P 64
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 130.923α = 90
b = 130.923β = 90
c = 67.956γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/Eunice Kennedy Shriver National Institute of Child Health & Human Development (NIH/NICHD)United StatesDP1-HD087988
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesR37-AI050872
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesR01-AI045937
National Institutes of Health/National Institute of Biomedical Imaging and Bioengineering (NIH/NIBIB)United StatesR01-EB001567

Revision History  (Full details and data files)

  • Version 1.0: 2016-10-26
    Type: Initial release
  • Version 1.1: 2017-09-20
    Changes: Author supporting evidence, Derived calculations
  • Version 1.2: 2018-02-21
    Changes: Database references
  • Version 1.3: 2022-03-23
    Changes: Author supporting evidence, Database references
  • Version 1.4: 2024-04-03
    Changes: Data collection, Refinement description