6K99

Structure of ASC CARD filament


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.10 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural basis for distinct inflammasome complex assembly by human NLRP1 and CARD8.

Gong, Q.Robinson, K.Xu, C.Huynh, P.T.Chong, K.H.C.Tan, E.Y.J.Zhang, J.Boo, Z.Z.Teo, D.E.T.Lay, K.Zhang, Y.Lim, J.S.Y.Goh, W.I.Wright, G.Zhong, F.L.Reversade, B.Wu, B.

(2021) Nat Commun 12: 188-188

  • DOI: https://doi.org/10.1038/s41467-020-20319-5
  • Primary Citation of Related Structures:  
    6K7V, 6K8J, 6K99, 6K9F

  • PubMed Abstract: 

    Nod-like receptor (NLR) proteins activate pyroptotic cell death and IL-1 driven inflammation by assembling and activating the inflammasome complex. Closely related sensor proteins NLRP1 and CARD8 undergo unique auto-proteolysis-dependent activation and are implicated in auto-inflammatory diseases; however, their mechanisms of activation are not understood. Here we report the structural basis of how the activating domains (FIIND UPA -CARD) of NLRP1 and CARD8 self-oligomerize to assemble distinct inflammasome complexes. Recombinant FIIND UPA -CARD of NLRP1 forms a two-layered filament, with an inner core of oligomerized CARD surrounded by an outer ring of FIIND UPA . Biochemically, self-assembled NLRP1-CARD filaments are sufficient to drive ASC speck formation in cultured human cells-a process that is greatly enhanced by NLRP1-FIIND UPA which forms oligomers in vitro. The cryo-EM structures of NLRP1-CARD and CARD8-CARD filaments, solved here at 3.7 Å, uncover unique structural features that enable NLRP1 and CARD8 to discriminate between ASC and pro-caspase-1. In summary, our findings provide structural insight into the mechanisms of activation for human NLRP1 and CARD8 and reveal how highly specific signaling can be achieved by heterotypic CARD interactions within the inflammasome complexes.


  • Organizational Affiliation

    School of Biological Sciences, Nanyang Technological University, Singapore, 637551, Singapore.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Apoptosis-associated speck-like protein containing a CARD83Homo sapiensMutation(s): 0 
Gene Names: PYCARDASCCARD5TMS1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9ULZ3 (Homo sapiens)
Explore Q9ULZ3 
Go to UniProtKB:  Q9ULZ3
PHAROS:  Q9ULZ3
GTEx:  ENSG00000103490 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9ULZ3
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.10 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION2.0
MODEL REFINEMENTPHENIXdev 2405

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Ministry of Education (Singapore)Singaporetier2 and tier1

Revision History  (Full details and data files)

  • Version 1.0: 2020-09-16
    Type: Initial release
  • Version 1.1: 2021-03-24
    Changes: Database references, Structure summary
  • Version 1.2: 2024-03-27
    Changes: Data collection, Database references