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- PDB-8ej4: Cryo-EM structure of the active NLRP3 inflammasome disk -

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Basic information

Entry
Database: PDB / ID: 8ej4
TitleCryo-EM structure of the active NLRP3 inflammasome disk
Components
  • NACHT, LRR and PYD domains-containing protein 3
  • Serine/threonine-protein kinase Nek7
KeywordsImmune System/Transferase / Inflammasome / CYTOSOLIC PROTEIN / Immune System-Transferase complex
Function / homology
Function and homology information


NEK6-subfamily protein kinase / detection of biotic stimulus / molecular sensor activity / phosphatidylinositol phosphate binding / Activation of NIMA Kinases NEK9, NEK6, NEK7 / positive regulation of T-helper 2 cell differentiation / NLRP3 inflammasome complex assembly / positive regulation of T-helper 2 cell cytokine production / interphase microtubule organizing center / positive regulation of type 2 immune response ...NEK6-subfamily protein kinase / detection of biotic stimulus / molecular sensor activity / phosphatidylinositol phosphate binding / Activation of NIMA Kinases NEK9, NEK6, NEK7 / positive regulation of T-helper 2 cell differentiation / NLRP3 inflammasome complex assembly / positive regulation of T-helper 2 cell cytokine production / interphase microtubule organizing center / positive regulation of type 2 immune response / NLRP3 inflammasome complex / Nuclear Pore Complex (NPC) Disassembly / cysteine-type endopeptidase activator activity / peptidoglycan binding / cellular response to potassium ion / osmosensory signaling pathway / phosphatidylinositol-4-phosphate binding / negative regulation of non-canonical NF-kappaB signal transduction / pattern recognition receptor signaling pathway / negative regulation of interleukin-1 beta production / positive regulation of NLRP3 inflammasome complex assembly / pyroptotic inflammatory response / positive regulation of interleukin-4 production / positive regulation of telomere maintenance / microtubule organizing center / negative regulation of acute inflammatory response / The NLRP3 inflammasome / Purinergic signaling in leishmaniasis infection / spindle assembly / signaling adaptor activity / EML4 and NUDC in mitotic spindle formation / protein maturation / regulation of mitotic cell cycle / molecular function activator activity / positive regulation of interleukin-1 beta production / molecular condensate scaffold activity / defense response / positive regulation of non-canonical NF-kappaB signal transduction / Cytoprotection by HMOX1 / ADP binding / protein homooligomerization / cellular response to virus / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / negative regulation of inflammatory response / Metalloprotease DUBs / positive regulation of inflammatory response / spindle pole / positive regulation of NF-kappaB transcription factor activity / SARS-CoV-1 activates/modulates innate immune responses / cellular response to lipopolysaccharide / regulation of inflammatory response / protein-macromolecule adaptor activity / DNA-binding transcription factor binding / molecular adaptor activity / sequence-specific DNA binding / microtubule / eukaryotic translation initiation factor 2alpha kinase activity / 3-phosphoinositide-dependent protein kinase activity / DNA-dependent protein kinase activity / ribosomal protein S6 kinase activity / histone H3S10 kinase activity / histone H2AXS139 kinase activity / histone H3S28 kinase activity / histone H4S1 kinase activity / histone H2BS14 kinase activity / histone H3T3 kinase activity / histone H2AS121 kinase activity / Rho-dependent protein serine/threonine kinase activity / histone H2BS36 kinase activity / histone H3S57 kinase activity / histone H2AT120 kinase activity / AMP-activated protein kinase activity / histone H2AS1 kinase activity / histone H3T6 kinase activity / histone H3T11 kinase activity / histone H3T45 kinase activity / protein phosphorylation / inflammatory response / Golgi membrane / innate immune response / protein serine kinase activity / protein serine/threonine kinase activity / apoptotic process / centrosome / SARS-CoV-2 activates/modulates innate and adaptive immune responses / endoplasmic reticulum / signal transduction / positive regulation of transcription by RNA polymerase II / ATP hydrolysis activity / mitochondrion / extracellular region / nucleoplasm / ATP binding / metal ion binding / identical protein binding / nucleus / membrane / cytosol / cytoplasm
Similarity search - Function
NACHT-associated domain / Fish-specific NACHT associated domain / Fish-specific NACHT associated domain / : / NACHT, LRR and PYD domains-containing protein, helical domain HD2 / NLRC4 helical domain HD2 / NOD2, winged helix domain / NOD2 winged helix domain / DAPIN domain / NACHT nucleoside triphosphatase ...NACHT-associated domain / Fish-specific NACHT associated domain / Fish-specific NACHT associated domain / : / NACHT, LRR and PYD domains-containing protein, helical domain HD2 / NLRC4 helical domain HD2 / NOD2, winged helix domain / NOD2 winged helix domain / DAPIN domain / NACHT nucleoside triphosphatase / NACHT domain / DAPIN domain profile. / NACHT-NTPase domain profile. / PAAD/DAPIN/Pyrin domain / PAAD/DAPIN/Pyrin domain / Leucine rich repeat, ribonuclease inhibitor type / Leucine Rich repeat / Death-like domain superfamily / Leucine-rich repeat / Leucine-rich repeat domain superfamily / Serine-threonine/tyrosine-protein kinase, catalytic domain / Serine/threonine-protein kinase, active site / Serine/Threonine protein kinases active-site signature. / Protein kinase domain / Serine/Threonine protein kinases, catalytic domain / Protein kinase, ATP binding site / Protein kinases ATP-binding region signature. / Protein kinase domain profile. / Protein kinase domain / Protein kinase-like domain superfamily / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER / Serine/threonine-protein kinase Nek7 / NACHT, LRR and PYD domains-containing protein 3
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.4 Å
AuthorsHao, W. / Le, X.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Cancer Institute (NIH/NCI) United States
CitationJournal: 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
DepositionSep 16, 2022Deposition site: RCSB / Processing site: RCSB
Revision 1.0Dec 14, 2022Provider: repository / Type: Initial release
Revision 1.1Feb 1, 2023Group: Database references / Structure summary / Category: citation / citation_author / struct_keywords
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation.title / _citation.year / _citation_author.identifier_ORCID / _struct_keywords.pdbx_keywords / _struct_keywords.text
Revision 1.2Jun 19, 2024Group: Data collection / Category: chem_comp_atom / chem_comp_bond

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: NACHT, LRR and PYD domains-containing protein 3
B: NACHT, LRR and PYD domains-containing protein 3
C: NACHT, LRR and PYD domains-containing protein 3
D: NACHT, LRR and PYD domains-containing protein 3
E: NACHT, LRR and PYD domains-containing protein 3
F: NACHT, LRR and PYD domains-containing protein 3
G: NACHT, LRR and PYD domains-containing protein 3
H: NACHT, LRR and PYD domains-containing protein 3
I: NACHT, LRR and PYD domains-containing protein 3
J: NACHT, LRR and PYD domains-containing protein 3
K: Serine/threonine-protein kinase Nek7
L: Serine/threonine-protein kinase Nek7
M: Serine/threonine-protein kinase Nek7
N: Serine/threonine-protein kinase Nek7
O: Serine/threonine-protein kinase Nek7
P: Serine/threonine-protein kinase Nek7
Q: Serine/threonine-protein kinase Nek7
R: Serine/threonine-protein kinase Nek7
S: Serine/threonine-protein kinase Nek7
T: Serine/threonine-protein kinase Nek7
hetero molecules


Theoretical massNumber of molelcules
Total (without water)1,352,61340
Polymers1,347,13820
Non-polymers5,47620
Water00
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein
NACHT, LRR and PYD domains-containing protein 3 / Angiotensin/vasopressin receptor AII/AVP-like / Caterpiller protein 1.1 / CLR1.1 / Cold-induced ...Angiotensin/vasopressin receptor AII/AVP-like / Caterpiller protein 1.1 / CLR1.1 / Cold-induced autoinflammatory syndrome 1 protein / Cryopyrin / PYRIN-containing APAF1-like protein 1


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
Serine/threonine-protein kinase Nek7 / Never in mitosis A-related kinase 7 / NimA-related protein kinase 7


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 / PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER / ATP-GAMMA-S / ADENOSINE 5'-(3-THIOTRIPHOSPHATE) / ADENOSINE 5'-(GAMMA-THIOTRIPHOSPHATE) / ADENOSINE-5'-DIPHOSPHATE MONOTHIOPHOSPHATE


Mass: 523.247 Da / Num. of mol.: 10 / Source method: obtained synthetically / Formula: C10H16N5O12P3S / Feature type: SUBJECT OF INVESTIGATION / Comment: ATP-gamma-S, energy-carrying molecule analogue*YM
#4: Chemical
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 10 / Source method: obtained synthetically / Formula: Mg / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: a complex of NLRP3 and NEK7 / Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

CTF correctionType: NONE
3D reconstructionResolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 51576 / Symmetry type: POINT

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