+Open data
-Basic information
Entry | Database: PDB / ID: 8ej4 | ||||||
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Title | Cryo-EM structure of the active NLRP3 inflammasome disk | ||||||
Components |
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Keywords | Immune System/Transferase / Inflammasome / CYTOSOLIC PROTEIN / Immune System-Transferase complex | ||||||
Function / homology | Function and homology information NEK6-subfamily protein kinase / molecular sensor activity / detection of biotic stimulus / cysteine-type endopeptidase activator activity / phosphatidylinositol phosphate binding / positive regulation of T-helper 2 cell differentiation / NLRP3 inflammasome complex / Activation of NIMA Kinases NEK9, NEK6, NEK7 / NLRP3 inflammasome complex assembly / interphase microtubule organizing center ...NEK6-subfamily protein kinase / molecular sensor activity / detection of biotic stimulus / cysteine-type endopeptidase activator activity / phosphatidylinositol phosphate binding / positive regulation of T-helper 2 cell differentiation / NLRP3 inflammasome complex / Activation of NIMA Kinases NEK9, NEK6, NEK7 / NLRP3 inflammasome complex assembly / interphase microtubule organizing center / positive regulation of T-helper 2 cell cytokine production / osmosensory signaling pathway / positive regulation of type 2 immune response / cellular response to potassium ion / Nuclear Pore Complex (NPC) Disassembly / peptidoglycan binding / pattern recognition receptor signaling pathway / negative regulation of non-canonical NF-kappaB signal transduction / phosphatidylinositol-4-phosphate binding / microtubule organizing center / negative regulation of interleukin-1 beta production / positive regulation of NLRP3 inflammasome complex assembly / pyroptotic inflammatory response / positive regulation of interleukin-4 production / : / negative regulation of acute inflammatory response / positive regulation of telomere capping / The NLRP3 inflammasome / protein maturation / spindle assembly / Purinergic signaling in leishmaniasis infection / signaling adaptor activity / EML4 and NUDC in mitotic spindle formation / regulation of mitotic cell cycle / positive regulation of telomere maintenance via telomerase / positive regulation of interleukin-1 beta production / molecular function activator activity / molecular condensate scaffold activity / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / ADP binding / protein homooligomerization / Cytoprotection by HMOX1 / cellular response to virus / Metalloprotease DUBs / defense response / negative regulation of inflammatory response / spindle pole / positive regulation of inflammatory response / positive regulation of non-canonical NF-kappaB signal transduction / SARS-CoV-1 activates/modulates innate immune responses / positive regulation of NF-kappaB transcription factor activity / protein-macromolecule adaptor activity / cellular response to lipopolysaccharide / DNA-binding transcription factor binding / microtubule / sequence-specific DNA binding / molecular adaptor activity / inflammatory response / protein phosphorylation / Golgi membrane / innate immune response / protein serine kinase activity / protein serine/threonine kinase activity / centrosome / apoptotic process / SARS-CoV-2 activates/modulates innate and adaptive immune responses / signal transduction / endoplasmic reticulum / positive regulation of transcription by RNA polymerase II / ATP hydrolysis activity / mitochondrion / extracellular region / nucleoplasm / ATP binding / identical protein binding / membrane / nucleus / metal ion binding / cytosol / cytoplasm Similarity search - Function | ||||||
Biological species | Homo sapiens (human) | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.4 Å | ||||||
Authors | Hao, W. / Le, X. | ||||||
Funding support | United States, 1items
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Citation | Journal: Nature / Year: 2023 Title: Cryo-EM structures of the active NLRP3 inflammasome disc. Authors: Le Xiao / Venkat Giri Magupalli / Hao Wu / Abstract: Inflammasomes are cytosolic innate immune complexes that activate caspase-1 following detection of pathogenic and endogenous dangers, and NACHT-, leucine-rich repeat (LRR)- and pyrin domain (PYD)- ...Inflammasomes are cytosolic innate immune complexes that activate caspase-1 following detection of pathogenic and endogenous dangers, and NACHT-, leucine-rich repeat (LRR)- and pyrin domain (PYD)-containing protein 3 (NLRP3) is an inflammasome sensor of membrane damage highly important in regard to the induction of inflammation. Here we report cryogenic electron microscopy structures of disc-shaped active NLRP3 oligomers in complex with adenosine 5'-O-(3-thio)triphosphate, the centrosomal NIMA-related kinase 7 (NEK7) and the adaptor protein ASC, which recruits caspase-1. In these NLRP3-NEK7-ASC complexes, the central NACHT domain of NLRP3 assumes an ATP-bound conformation in which two of its subdomains rotate by about 85° relative to the ADP-bound inactive conformation. The fish-specific NACHT-associated domain conserved in NLRP3 but absent in most NLRPs becomes ordered in its key regions to stabilize the active NACHT conformation and mediate most interactions in the disc. Mutations on these interactions compromise NLRP3-mediated caspase-1 activation. The N-terminal PYDs from all NLRP3 subunits combine to form a PYD filament that recruits ASC PYD to elicit downstream signalling. Surprisingly, the C-terminal LRR domain and the LRR-bound NEK7 do not participate in disc interfaces. Together with previous structures of an inactive NLRP3 cage in which LRR-LRR interactions play an important role, we propose that the role of NEK7 is to break the inactive cage to transform NLRP3 into the active NLRP3 inflammasome disc. | ||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 8ej4.cif.gz | 2.1 MB | Display | PDBx/mmCIF format |
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PDB format | pdb8ej4.ent.gz | Display | PDB format | |
PDBx/mmJSON format | 8ej4.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Summary document | 8ej4_validation.pdf.gz | 2.1 MB | Display | wwPDB validaton report |
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Full document | 8ej4_full_validation.pdf.gz | 2.8 MB | Display | |
Data in XML | 8ej4_validation.xml.gz | 387.6 KB | Display | |
Data in CIF | 8ej4_validation.cif.gz | 551.4 KB | Display | |
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/ej/8ej4 ftp://data.pdbj.org/pub/pdb/validation_reports/ej/8ej4 | HTTPS FTP |
-Related structure data
Related structure data | 28175MC 8ertC M: map data used to model this data C: citing same article (ref.) |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
-Assembly
Deposited unit |
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1 |
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-Components
#1: Protein | Mass: 102675.570 Da / Num. of mol.: 10 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: NLRP3, C1orf7, CIAS1, NALP3, PYPAF1 / Production host: Homo sapiens (human) / References: UniProt: Q96P20 #2: Protein | Mass: 32038.203 Da / Num. of mol.: 10 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: NEK7 / Production host: Homo sapiens (human) References: UniProt: Q8TDX7, non-specific serine/threonine protein kinase #3: Chemical | ChemComp-AGS / #4: Chemical | ChemComp-MG / Has ligand of interest | Y | |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
-Sample preparation
Component | Name: a complex of NLRP3 and NEK7 / Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT |
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Source (natural) | Organism: Homo sapiens (human) |
Source (recombinant) | Organism: Homo sapiens (human) |
Buffer solution | pH: 8 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
-Electron microscopy imaging
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 1000 nm |
Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
-Processing
CTF correction | Type: NONE |
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3D reconstruction | Resolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 51576 / Symmetry type: POINT |