Structure of a bacterial death-like domain from Azospirillum sp.

Experimental Data Snapshot

  • Resolution: 1.88 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.208 

Starting Model: in silico
View more details

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


CARD-like domains mediate anti-phage defense in bacterial gasdermin systems.

Wein, T.Johnson, A.G.Millman, A.Lange, K.Yirmiya, E.Hadary, R.Garb, J.Steinruecke, F.Hill, A.B.Kranzusch, P.J.Sorek, R.

(2023) bioRxiv 

  • DOI: https://doi.org/10.1101/2023.05.28.542683
  • Primary Citation of Related Structures:  
    8SRZ, 8SS1

  • PubMed Abstract: 

    Caspase recruitment domains (CARDs) and pyrin domains are important facilitators of inflammasome activity and pyroptosis. Upon pathogen recognition by NLR proteins, CARDs recruit and activate caspases, which, in turn, activate gasdermin pore forming proteins to and induce pyroptotic cell death. Here we show that CARD-like domains are present in defense systems that protect bacteria against phage. The bacterial CARD is essential for protease-mediated activation of certain bacterial gasdermins, which promote cell death once phage infection is recognized. We further show that multiple anti-phage defense systems utilize CARD-like domains to activate a variety of cell death effectors. We find that these systems are triggered by a conserved immune evasion protein that phages use to overcome the bacterial defense system RexAB, demonstrating that phage proteins inhibiting one defense system can activate another. We also detect a phage protein with a predicted CARD-like structure that can inhibit the CARD-containing bacterial gasdermin system. Our results suggest that CARD domains represent an ancient component of innate immune systems conserved from bacteria to humans, and that CARD-dependent activation of gasdermins is conserved in organisms across the tree of life.

  • Organizational Affiliation

    Department of Molecular Genetics, Weizmann Institute of Science, Rehovot 7610001, Israel.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Serine protease
A, B
100Azospirillum sp.Mutation(s): 0 
Gene Names: TSO352_05040
EC: 3.4.21
Find proteins for A0A2U1VUZ9 (Azospirillum sp. TSO35-2)
Explore A0A2U1VUZ9 
Go to UniProtKB:  A0A2U1VUZ9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A2U1VUZ9
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.88 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.208 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 37.959α = 90
b = 65.367β = 111.061
c = 38.829γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States1DP2GM146250-01

Revision History  (Full details and data files)

  • Version 1.0: 2023-06-07
    Type: Initial release
  • Version 1.1: 2023-07-19
    Changes: Database references
  • Version 1.2: 2024-05-22
    Changes: Data collection