9CS7

Structure of Azospirillum bacterial CARD crystal form 1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.88 Å
  • R-Value Free: 
    0.232 (Depositor), 0.233 (DCC) 
  • R-Value Work: 
    0.198 (Depositor), 0.199 (DCC) 
  • R-Value Observed: 
    0.201 (Depositor) 

Starting Model: in silico
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wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

CARD domains mediate anti-phage defence in bacterial gasdermin systems.

Wein, T.Millman, A.Lange, K.Yirmiya, E.Hadary, R.Garb, J.Melamed, S.Amitai, G.Dym, O.Steinruecke, F.Hill, A.B.Kranzusch, P.J.Sorek, R.

(2025) Nature 

  • DOI: https://doi.org/10.1038/s41586-024-08498-3
  • Primary Citation of Related Structures:  
    9CS7, 9CS8, 9FRR

  • PubMed Abstract: 

    Caspase recruitment domains (CARDs) and pyrin domains are important facilitators of inflammasome activity and pyroptosis 1 . Following pathogen recognition by nucleotide binding-domain, leucine-rich, repeat-containing (NLR) proteins, CARDs recruit and activate caspases, which, in turn, activate gasdermin pore-forming proteins to induce pyroptotic cell death 2 . Here we show that CARD domains are present in defence systems that protect bacteria against phage. The bacterial CARD domain 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 defence systems use CARD domains to activate a variety of cell death effectors, and that CARD domains mediate protein-protein interactions in these systems. We find that these systems are triggered by a conserved immune-evasion protein used by phages to overcome the bacterial defence system RexAB 3 , demonstrating that phage proteins inhibiting one defence system can activate another. 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 shared in organisms across the tree of life.


  • Organizational Affiliation

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


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Serine protease
A, B
100AzospirillumMutation(s): 0 
Gene Names: TSO352_05040
EC: 3.4.21
UniProt
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
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.88 Å
  • R-Value Free:  0.232 (Depositor), 0.233 (DCC) 
  • R-Value Work:  0.198 (Depositor), 0.199 (DCC) 
  • R-Value Observed: 0.201 (Depositor) 
Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 37.959α = 90
b = 65.368β = 111.07
c = 38.831γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHENIXphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


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

Revision History  (Full details and data files)

  • Version 1.0: 2025-01-29
    Type: Initial release
  • Version 1.1: 2025-02-12
    Changes: Database references