+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-7055 | ||||||||||||
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Title | Cryo-EM structure of the NAIP5-NLRC4-flagellin inflammasome | ||||||||||||
Map data | Postprocessed (sharpened, filtered) final map of the NAIP5-NLRC4-flagellin inflammasome | ||||||||||||
Sample |
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Keywords | Innate immunity / molecular complex / IMMUNE SYSTEM | ||||||||||||
Function / homology | Function and homology information IPAF inflammasome complex / bacterial-type flagellum / pyroptotic inflammatory response / cysteine-type endopeptidase inhibitor activity involved in apoptotic process / detection of bacterium / activation of innate immune response / positive regulation of interleukin-1 beta production / protein homooligomerization / perikaryon / regulation of apoptotic process ...IPAF inflammasome complex / bacterial-type flagellum / pyroptotic inflammatory response / cysteine-type endopeptidase inhibitor activity involved in apoptotic process / detection of bacterium / activation of innate immune response / positive regulation of interleukin-1 beta production / protein homooligomerization / perikaryon / regulation of apoptotic process / defense response to Gram-negative bacterium / defense response to bacterium / inflammatory response / symbiont entry into host cell / innate immune response / neuronal cell body / negative regulation of apoptotic process / apoptotic process / structural molecule activity / protein homodimerization activity / extracellular region / ATP binding / identical protein binding / metal ion binding / cytosol Similarity search - Function | ||||||||||||
Biological species | Mus musculus (house mouse) / Legionella pneumophila (bacteria) | ||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 5.2 Å | ||||||||||||
Authors | Tenthorey JL / Haloupek N | ||||||||||||
Funding support | Spain, United States, 3 items
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Citation | Journal: Science / Year: 2017 Title: The structural basis of flagellin detection by NAIP5: A strategy to limit pathogen immune evasion. Authors: Jeannette L Tenthorey / Nicole Haloupek / José Ramón López-Blanco / Patricia Grob / Elise Adamson / Ella Hartenian / Nicholas A Lind / Natasha M Bourgeois / Pablo Chacón / Eva Nogales / Russell E Vance / Abstract: Robust innate immune detection of rapidly evolving pathogens is critical for host defense. Nucleotide-binding domain leucine-rich repeat (NLR) proteins function as cytosolic innate immune sensors in ...Robust innate immune detection of rapidly evolving pathogens is critical for host defense. Nucleotide-binding domain leucine-rich repeat (NLR) proteins function as cytosolic innate immune sensors in plants and animals. However, the structural basis for ligand-induced NLR activation has so far remained unknown. NAIP5 (NLR family, apoptosis inhibitory protein 5) binds the bacterial protein flagellin and assembles with NLRC4 to form a multiprotein complex called an inflammasome. Here we report the cryo-electron microscopy structure of the assembled ~1.4-megadalton flagellin-NAIP5-NLRC4 inflammasome, revealing how a ligand activates an NLR. Six distinct NAIP5 domains contact multiple conserved regions of flagellin, prying NAIP5 into an open and active conformation. We show that innate immune recognition of multiple ligand surfaces is a generalizable strategy that limits pathogen evolution and immune escape. | ||||||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_7055.map.gz | 321 MB | EMDB map data format | |
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Header (meta data) | emd-7055-v30.xml emd-7055.xml | 25.6 KB 25.6 KB | Display Display | EMDB header |
Images | emd_7055.png | 50.8 KB | ||
Masks | emd_7055_msk_1.map | 343 MB | Mask map | |
Filedesc metadata | emd-7055.cif.gz | 8.4 KB | ||
Others | emd_7055_half_map_1.map.gz emd_7055_half_map_2.map.gz | 273.6 MB 273.7 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-7055 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-7055 | HTTPS FTP |
-Validation report
Summary document | emd_7055_validation.pdf.gz | 910.5 KB | Display | EMDB validaton report |
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Full document | emd_7055_full_validation.pdf.gz | 910.1 KB | Display | |
Data in XML | emd_7055_validation.xml.gz | 17.1 KB | Display | |
Data in CIF | emd_7055_validation.cif.gz | 20.3 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-7055 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-7055 | HTTPS FTP |
-Related structure data
Related structure data | 6b5bMC M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_7055.map.gz / Format: CCP4 / Size: 343 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | Postprocessed (sharpened, filtered) final map of the NAIP5-NLRC4-flagellin inflammasome | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.31 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Mask #1
File | emd_7055_msk_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: Unfiltered, unsharpened half map #1 of the NAIP5-NLRC4-flagellin...
File | emd_7055_half_map_1.map | ||||||||||||
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Annotation | Unfiltered, unsharpened half map #1 of the NAIP5-NLRC4-flagellin inflammasome | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: Unfiltered, unsharpened half map #2 of the NAIP5-NLRC4-flagellin...
File | emd_7055_half_map_2.map | ||||||||||||
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Annotation | Unfiltered, unsharpened half map #2 of the NAIP5-NLRC4-flagellin inflammasome | ||||||||||||
Projections & Slices |
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Density Histograms |
-Sample components
-Entire : NAIP5-NLRC4-flagellin inflammasome
Entire | Name: NAIP5-NLRC4-flagellin inflammasome |
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Components |
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-Supramolecule #1: NAIP5-NLRC4-flagellin inflammasome
Supramolecule | Name: NAIP5-NLRC4-flagellin inflammasome / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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-Supramolecule #2: NAIP5
Supramolecule | Name: NAIP5 / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1 |
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Source (natural) | Organism: Mus musculus (house mouse) |
-Supramolecule #3: NLRC4
Supramolecule | Name: NLRC4 / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #2 |
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Source (natural) | Organism: Mus musculus (house mouse) |
-Supramolecule #4: flagellin
Supramolecule | Name: flagellin / type: complex / ID: 4 / Parent: 1 / Macromolecule list: #3 |
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Source (natural) | Organism: Legionella pneumophila (bacteria) |
-Macromolecule #1: Baculoviral IAP repeat-containing protein 1e
Macromolecule | Name: Baculoviral IAP repeat-containing protein 1e / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: Mus musculus (house mouse) |
Molecular weight | Theoretical: 159.874828 KDa |
Recombinant expression | Organism: Homo sapiens (human) |
Sequence | String: MAEHGESSED RISEIDYEFL PELSALLGVD AFQVAKSQEE EEHKERMKMK KGFNSQMRSE AKRLKTFETY DTFRSWTPQE MAAAGFYHT GVKLGVQCFC CSLILFGNSL RKLPIERHKK LRPECEFLQG KDVGNIGKYD IRVKSPEKML RGGKARYHEE E ARLESFED ...String: MAEHGESSED RISEIDYEFL PELSALLGVD AFQVAKSQEE EEHKERMKMK KGFNSQMRSE AKRLKTFETY DTFRSWTPQE MAAAGFYHT GVKLGVQCFC CSLILFGNSL RKLPIERHKK LRPECEFLQG KDVGNIGKYD IRVKSPEKML RGGKARYHEE E ARLESFED WPFYAHGTSP RVLSAAGFVF TGKRDTVQCF SCGGSLGNWE EGDDPWKEHA KWFPKCEFLQ SKKSSEEIAQ YI QSYEGFV HVTGEHFVKS WVRRELPMVS AYCNDSVFAN EELRMDMFKD WPQESPVGVE ALVRAGFFYT GKKDIVRCFS CGG CLEKWA EGDDPMEDHI KFFPECVFLQ TLKSSAEVIP TLQSQYALPE ATETTRESNH GDAAAVHSTV VDLGRSEAQW FQEA RSLSE QLRDNYTKAT FRHMNLPEVC SSLGTDHLLS CDVSIISKHI SQPVQEALTI PEVFSNLNSV MCVEGETGSG KTTFL KRIA FLWASGCCPL LYRFQLVFYL SLSSITPDQG LANIICAQLL GAGGCISEVC LSSSIQQLQH QVLFLLDDYS GLASLP QAL HTLITKNYLS RTCLLIAVHT NRVRDIRLYL GTSLEIQEFP FYNTVSVLRK FFSHDIICVE KLIIYFIDNK DLQGVYK TP LFVAAVCTDW IQNASAQDKF QDVTLFQSYM QYLSLKYKAT AEPLQATVSS CGQLALTGLF SSCFEFNSDD LAEAGVDE D EKLTTLLMSK FTAQRLRPVY RFLGPLFQEF LAAVRLTELL SSDRQEDQDL GLYYLRQIDS PLKAINSFNI FLYYVSSHS SSKAAPTVVS HLLQLVDEKE SLENMSENED YMKLHPQTFL WFQFVRGLWL VSPESSSSFV SEHLLRLALI FAYESNTVAE CSPFILQFL RGKTLALRVL NLQYFRDHPE SLLLLRSLKV SINGNKMSSY VDYSFKTYFE NLQPPAIDEE YTSAFEHISE W RRNFAQDE EIIKNYENIR PRALPDISEG YWKLSPKPCK IPKLEVQVNN TDAADQALLQ VLMEVFSASQ SIEFRLFNSS GF LESICPA LELSKASVTK CSMSRLELSR AEQELLLTLP ALQSLEVSET NQLPEQLFHN LHKFLGLKEL CVRLDGKPDV LSV LPGEFP NLHHMEKLSI RTSTESDLSK LVKFIQNFPN LHVFHLKCDF LSNCESLMAV LASCKKLREI EFSGRCFEAM TFVN ILPNF VSLKILNLKD QQFPDKETSE KFAQALGSLR NLEELLVPTG DGIHQVAKLI VRQCLQLPCL RVLTFHDILD DDSVI EIAR AATSGGFQKL ENLDISMNHK ITEEGYRNFF QALDNLPNLQ ELNICRNIPG RIQVQATTVK ALGQCVSRLP SLIRLH MLS WLLDEEDMKV INDVKERHPQ SKRLIIFWKL IVPFSPVILE UniProtKB: Baculoviral IAP repeat-containing protein 1e |
-Macromolecule #2: NLR family CARD domain-containing protein 4
Macromolecule | Name: NLR family CARD domain-containing protein 4 / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO |
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Source (natural) | Organism: Mus musculus (house mouse) |
Molecular weight | Theoretical: 116.886 KDa |
Recombinant expression | Organism: Homo sapiens (human) |
Sequence | String: MNFIRNNRRA LIQRMGLTVT KQICDDLFAL NVLNNQEANV IYCEPLEQEA ARKIIHMTMQ KGSAACNLFL KSLENWDYFV YQDLTGQNL SYQVTEEDLN VLAQNLKDLY NSPAFLNFYP LGEDIDIIFN LEKTFTEPIM WKKDHRHHRV EQLTLGSLLE A LKSPCLIE ...String: MNFIRNNRRA LIQRMGLTVT KQICDDLFAL NVLNNQEANV IYCEPLEQEA ARKIIHMTMQ KGSAACNLFL KSLENWDYFV YQDLTGQNL SYQVTEEDLN VLAQNLKDLY NSPAFLNFYP LGEDIDIIFN LEKTFTEPIM WKKDHRHHRV EQLTLGSLLE A LKSPCLIE GESGKGKSTL LQRIAMLWAS GGCRALKGFR LVFFIHLRSA RGGLFETLYD QLLNIPDFIS KPTFKALLLK LH KEVLFLL DGYNEFHPQN CPEIEALIKE NHRFKNMVIV TTTTECLRHI RHVGALTAEV GDMTEDSAKD LIEAVLVPDQ VER LWAQIQ ESRCLRNLMK TPLFVVITCA IQMGRQEFQA HTQTMLFQTF YDLLIQKNSH RYRGGASGDF ARSLDYCGDL ALEG VFAHK FDFEPEHGSS MNEDVLVTIG LLCKYTAQRL KPTYKFFHKS FQEYTAGRRL SSLLTSKEPE EVSKGNSYLN KMVSI SDIT SLYGNLLLYT CGSSTEATRA VMRHLAMVYQ HGSLQGLSVT KRPLWRQESI QSLRNTTEQD VLKAINVNSF VECGIN LFS ESMSKSDLSQ EFEAFFQGKS LYINSENIPD YLFDFFEYLP NCASALDFVK LDFYERATES QDKAEENVPG VHTEGPS ET YIPPRAVSLF FNWKQEFKTL EVTLRDINKL NKQDIKYLGK IFSSATNLRL HIKRCAAMAG RLSSVLRTCK NMHTLMVE A SPLTTDDEQY ITSVTGLQNL SIHRLHTQQL PGGLIDSLGN LKNLERLILD DIRMNEEDAK NLAEGLRSLK KMRLLHLTH LSDIGEGMDY IVKSLSEESC DLQEMKLVAC CLTANSVKVL AQNLHNLIKL SILDISENYL EKDGNEALQE LIGRLGVLGE LTTLMLPWC WDVHTSLPKL LKQLEGTPGL AKLGLKNWRL RDEEIKSLGE FLEMNPLRDL QQLDLAGHCV SSDGWLYFMN V FENLKQLV FFDFSTEEFL PDAALVRKLS QVLSKLTLLQ EVKLTGWEFD DYDISAIKGT FKLVTA UniProtKB: NLR family CARD domain-containing protein 4 |
-Macromolecule #3: Flagellin
Macromolecule | Name: Flagellin / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: Legionella pneumophila (bacteria) |
Molecular weight | Theoretical: 58.49407 KDa |
Recombinant expression | Organism: Homo sapiens (human) |
Sequence | String: MEQKLISEED LNEMEQKLIS EEDLNEMEQK LISEEDLNEM EQKLISEEDL NEMEQKLISE EDLNEMESLG DLTMEQKLIS EEDLNSGRP AAMAQVINTN VASLTAQRNL GVSGNMMQTS IQRLSSGLRI NSAKDDAAGL AISQRMTAQI RGMNQAVRNA N DGISLAQV ...String: MEQKLISEED LNEMEQKLIS EEDLNEMEQK LISEEDLNEM EQKLISEEDL NEMEQKLISE EDLNEMESLG DLTMEQKLIS EEDLNSGRP AAMAQVINTN VASLTAQRNL GVSGNMMQTS IQRLSSGLRI NSAKDDAAGL AISQRMTAQI RGMNQAVRNA N DGISLAQV AEGAMQETTN ILQRMRELSV QAANSTNNSS DRSSIQSEIS QLKSELERIA QNTEFNGQRI LDGSFSGASF QV GANSNQT INFSIGSTKA SSLGGIATAT GTEVAGAAAA DITIAIGGGA ATSINSSANF TGALNGQDAT SAYAKAAAIN DAG IGGLSV TASTSGTQAV GAIGGTAGDT YNLTINGVAI YTNLNVATAL TNSDLRDAIN GVSNQTGVVA SLNGGNMTLT AADG RNITV TESGTGFTAG TDGLTVTGGA FDGALRGTLS ISAVDTIAIG GTVANIGLSA NISKDTVGID SLDVSTASGA QTAIK RIDA ALNSVNSNRA NMGALQNRFE STIANLQNVS DNLSAARSRI QDADYAAEMA SLTKNQILQQ AGTAMLAQAN SLPQSV LSL LGR UniProtKB: UNIPROTKB: G8UUW9 |
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 7.6 Component:
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Grid | Model: Quantifoil R2/2 / Material: COPPER / Mesh: 400 / Details: Carbon-coated | |||||||||||||||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 295 K / Instrument: FEI VITROBOT MARK II |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Digitization - Frames/image: 1-20 / Number grids imaged: 3 / Average exposure time: 6.0 sec. / Average electron dose: 45.8 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 4.0 µm / Nominal defocus min: 1.8 µm / Nominal magnification: 22500 |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
+Image processing
-Atomic model buiding 1
Details | Homology models predicted by I-TASSER server were used as initial model sources. The main structural template identified by I-TASSER for NAIP5 was the crystal structure of NLRC4 in the inactive conformation (PDB ID: 4KXF) that covered all the domains except the N-terminal BIR region, where homology models from several BIR domains were recognized (PDB IDs: 1SE0, 2VM5, and 1OXQ for BIR1, BIR2, and BIR3, respectively). Predictions were first rigid body docked into the density map using Chimera and/or ADP_EM. Then, the docked models were flexibly fitted with iMODFIT, if necessary. Finally, all models were refined in Phenix. |
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Refinement | Space: REAL / Protocol: FLEXIBLE FIT / Overall B value: 167 / Target criteria: Correlation coefficient |
Output model | PDB-6b5b: |