Crystal structure of death effector domain of Caspase8 in Homo Sapiens

Experimental Data Snapshot

  • Resolution: 2.20 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.208 

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Crystal structure of the death effector domains of caspase-8

Shen, C.Yue, H.Pei, J.Guo, X.Wang, T.Quan, J.M.

(2015) Biochem Biophys Res Commun 463: 297-302

  • DOI: https://doi.org/10.1016/j.bbrc.2015.05.054
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Caspase-8 is a key mediator in various biological processes such as apoptosis, necroptosis, inflammation, T/B cells activation, and cell motility. Caspase-8 is characterized by the N-terminal tandem death effector domains (DEDs) and the C-terminal catalytic protease domain. The DEDs mediate diverse functions of caspase-8 through homotypic interactions of the DEDs between caspase-8 and its partner proteins. Here, we report the first crystal structure of the DEDs of caspase-8. The overall structure of the DEDs of caspase-8 is similar to that of the DEDs of vFLIP MC159, which is composed of two tandem death effector domains that closely associate with each other in a head-to-tail manner. Structural analysis reveals distinct differences in the region connecting helices α2b and α4b in the second DED of the DEDs between caspase-8 and MC159, in which the helix α3b in MC159 is replaced by a loop in caspase-8. Moreover, the different amino acids in this region might confer the distinct features of solubility and aggregation for the DEDs of caspase-8 and MC159.

  • Organizational Affiliation

    Key Laboratory of Structural Biology, School of Chemical Biology & Biotechnology, Peking University, Shenzhen Graduate School, Shenzhen 518055, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
190Homo sapiensMutation(s): 2 
Gene Names: CASP8MCH5
UniProt & NIH Common Fund Data Resources
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 GroupQ14790
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.208 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.36α = 113.34
b = 52.106β = 116.89
c = 56.596γ = 90.12
Software Package:
Software NamePurpose
CrystalCleardata reduction
d*TREKdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number

Revision History  (Full details and data files)

  • Version 1.0: 2015-07-01
    Type: Initial release
  • Version 1.1: 2023-11-08
    Changes: Data collection, Database references, Derived calculations, Refinement description, Source and taxonomy, Structure summary