Biological Assembly 1  

Global Symmetry: Cyclic - C11  (3D View)
Global Stoichiometry: Homo 11-mer - A11 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 1,168.64 kDa 
• Atom Count: 80,124 
• Modelled Residue Count: 9,999 
• Deposited Residue Count: 10,252 
• Unique protein chains: 1

 3JBL

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

• PDB DOI: 10.2210/pdb3JBL/pdb
• EM Map EMD-6458: EMDB EMDataResource

• Classification: IMMUNE SYSTEM
• Organism(s): Mus musculus
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2015-09-05 Released: 2015-10-21 
• Deposition Author(s): 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.

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 4.70 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

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

• PubMed: 26449474 
• DOI: 10.1126/science.aac5789
• Primary Citation of Related Structures:  
  3JBL


• 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 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.

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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. [e-mail] [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
NLR family CARD domain-containing protein 4	B [auth A], C [auth B], D [auth C], E [auth D], F [auth E], G [auth F], H [auth G], I [auth H], J [auth I], K [auth J], A [auth K]	932	Mus musculus	Mutation(s): 0  Gene Names: Nlrc4, Card12, Ipaf
UniProt
Find proteins for Q3UP24 (Mus musculus) Explore Q3UP24  Go to UniProtKB:  Q3UP24

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
SEP	A [auth K], B [auth A], C [auth B], D [auth C], E [auth D], F [auth E], G [auth F], H [auth G], I [auth H], J [auth I], K [auth J]	L-PEPTIDE LINKING	C3 H8 N O6 P		SER

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 4.70 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2015-10-21 
Deposition Author(s): 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.

Revision History  

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