3JBL

Cryo-EM Structure of the Activated NAIP2/NLRC4 Inflammasome Reveals Nucleated Polymerization


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.7 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Cryo-EM structure of the activated NAIP2-NLRC4 inflammasome reveals nucleated polymerization.

Zhang, L.Chen, S.Ruan, J.Wu, J.Tong, A.B.Yin, Q.Li, Y.David, L.Lu, A.Wang, W.L.Marks, C.Ouyang, Q.Zhang, X.Mao, Y.Wu, H.

(2015) Science 350: 404-409

  • DOI: 10.1126/science.aac5789

  • PubMed Abstract: 
  • The NLR family apoptosis inhibitory proteins (NAIPs) bind conserved bacterial ligands, such as the bacterial rod protein PrgJ, and recruit NLR family CARD-containing protein 4 (NLRC4) as the inflammasome adapter to activate innate immunity. We found ...

    The NLR family apoptosis inhibitory proteins (NAIPs) bind conserved bacterial ligands, such as the bacterial rod protein PrgJ, and recruit NLR family CARD-containing protein 4 (NLRC4) as the inflammasome adapter to activate innate immunity. We found that the PrgJ-NAIP2-NLRC4 inflammasome is assembled into multisubunit disk-like structures through a unidirectional adenosine triphosphatase polymerization, primed with a single PrgJ-activated NAIP2 per disk. Cryo-electron microscopy (cryo-EM) reconstruction at subnanometer resolution revealed a ~90° hinge rotation accompanying NLRC4 activation. Unlike in the related heptameric Apaf-1 apoptosome, in which each subunit needs to be conformationally activated by its ligand before assembly, a single PrgJ-activated NAIP2 initiates NLRC4 polymerization in a domino-like reaction to promote the disk assembly. These insights reveal the mechanism of signal amplification in NAIP-NLRC4 inflammasomes.


    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NLR family CARD domain-containing protein 4
K, A, B, C, D, E, F, G, H, I, J
932Mus musculusMutation(s): 0 
Gene Names: Nlrc4 (Card12, Ipaf)
Find proteins for Q3UP24 (Mus musculus)
Go to UniProtKB:  Q3UP24
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
A, B, C, D, E, F, G, H, I, J, K
L-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.7 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-10-21
    Type: Initial release
  • Version 1.1: 2015-11-04
    Type: Database references, Other
  • Version 1.2: 2018-07-18
    Type: Data collection