+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-15779 | |||||||||
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Title | CryoEM structure of C5b8-CD59 | |||||||||
Map data | CryoEM reconstruction of C5b8-CD59. | |||||||||
Sample |
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Function / homology | Function and homology information negative regulation of activation of membrane attack complex / Terminal pathway of complement / membrane attack complex / complement binding / regulation of complement-dependent cytotoxicity / regulation of complement activation / Activation of C3 and C5 / negative regulation of macrophage chemotaxis / Cargo concentration in the ER / complement activation ...negative regulation of activation of membrane attack complex / Terminal pathway of complement / membrane attack complex / complement binding / regulation of complement-dependent cytotoxicity / regulation of complement activation / Activation of C3 and C5 / negative regulation of macrophage chemotaxis / Cargo concentration in the ER / complement activation / complement activation, alternative pathway / chemokine activity / COPII-mediated vesicle transport / retinol binding / endopeptidase inhibitor activity / tertiary granule membrane / positive regulation of vascular endothelial growth factor production / COPI-mediated anterograde transport / specific granule membrane / complement activation, classical pathway / positive regulation of chemokine production / transport vesicle / endoplasmic reticulum-Golgi intermediate compartment membrane / Peptide ligand-binding receptors / Regulation of Complement cascade / ER to Golgi transport vesicle membrane / chemotaxis / positive regulation of immune response / blood coagulation / extracellular vesicle / G alpha (i) signalling events / in utero embryonic development / vesicle / blood microparticle / killing of cells of another organism / cell surface receptor signaling pathway / inflammatory response / immune response / G protein-coupled receptor signaling pathway / Golgi membrane / external side of plasma membrane / innate immune response / signaling receptor binding / focal adhesion / Neutrophil degranulation / endoplasmic reticulum membrane / protein-containing complex binding / cell surface / extracellular space / extracellular exosome / extracellular region / membrane / plasma membrane Similarity search - Function | |||||||||
Biological species | Homo sapiens (human) / Escherichia coli (E. coli) / human (human) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.0 Å | |||||||||
Authors | Bubeck D / Couves EC / Gardner S | |||||||||
Funding support | European Union, United Kingdom, 2 items
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Citation | Journal: Nat Commun / Year: 2023 Title: Structural basis for membrane attack complex inhibition by CD59. Authors: Emma C Couves / Scott Gardner / Tomas B Voisin / Jasmine K Bickel / Phillip J Stansfeld / Edward W Tate / Doryen Bubeck / Abstract: CD59 is an abundant immuno-regulatory receptor that protects human cells from damage during complement activation. Here we show how the receptor binds complement proteins C8 and C9 at the membrane to ...CD59 is an abundant immuno-regulatory receptor that protects human cells from damage during complement activation. Here we show how the receptor binds complement proteins C8 and C9 at the membrane to prevent insertion and polymerization of membrane attack complex (MAC) pores. We present cryo-electron microscopy structures of two inhibited MAC precursors known as C5b8 and C5b9. We discover that in both complexes, CD59 binds the pore-forming β-hairpins of C8 to form an intermolecular β-sheet that prevents membrane perforation. While bound to C8, CD59 deflects the cascading C9 β-hairpins, rerouting their trajectory into the membrane. Preventing insertion of C9 restricts structural transitions of subsequent monomers and indirectly halts MAC polymerization. We combine our structural data with cellular assays and molecular dynamics simulations to explain how the membrane environment impacts the dual roles of CD59 in controlling pore formation of MAC, and as a target of bacterial virulence factors which hijack CD59 to lyse human cells. #1: Journal: Acta Crystallogr., Sect. D: Biol. Crystallogr. / Year: 2018 Title: Real-space refinement in PHENIX for cryo-EM and crystallography Authors: Afonine PV / Poon BK / Read RJ / Sobolev OV / Terwilliger TC / Urzhumtsev A / Adams PD | |||||||||
History |
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-Structure visualization
Supplemental images |
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-Downloads & links
-EMDB archive
Map data | emd_15779.map.gz | 281.2 MB | EMDB map data format | |
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Header (meta data) | emd-15779-v30.xml emd-15779.xml | 30.5 KB 30.5 KB | Display Display | EMDB header |
FSC (resolution estimation) | emd_15779_fsc.xml | 14.7 KB | Display | FSC data file |
Images | emd_15779.png | 100.9 KB | ||
Masks | emd_15779_msk_1.map | 343 MB | Mask map | |
Others | emd_15779_half_map_1.map.gz emd_15779_half_map_2.map.gz | 318.7 MB 318.7 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-15779 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-15779 | HTTPS FTP |
-Validation report
Summary document | emd_15779_validation.pdf.gz | 649.3 KB | Display | EMDB validaton report |
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Full document | emd_15779_full_validation.pdf.gz | 648.9 KB | Display | |
Data in XML | emd_15779_validation.xml.gz | 23.8 KB | Display | |
Data in CIF | emd_15779_validation.cif.gz | 31.3 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-15779 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-15779 | HTTPS FTP |
-Related structure data
Related structure data | 8b0fMC 8b0gC 8b0hC M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_15779.map.gz / Format: CCP4 / Size: 343 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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Annotation | CryoEM reconstruction of C5b8-CD59. | ||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.171 Å | ||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Mask #1
File | emd_15779_msk_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: CryoEM reconstruction of C5b8-CD59.
File | emd_15779_half_map_1.map | ||||||||||||
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Annotation | CryoEM reconstruction of C5b8-CD59. | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: CryoEM reconstruction of C5b8-CD59.
File | emd_15779_half_map_2.map | ||||||||||||
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Annotation | CryoEM reconstruction of C5b8-CD59. | ||||||||||||
Projections & Slices |
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Density Histograms |
-Sample components
+Entire : C5b8-CD59
+Supramolecule #1: C5b8-CD59
+Supramolecule #2: Complement components C5, C6, C7 and C8
+Supramolecule #3: CD59 glycoprotein
+Macromolecule #1: Complement C5
+Macromolecule #2: Complement component C6
+Macromolecule #3: Complement component C7
+Macromolecule #4: Complement component C8 beta chain
+Macromolecule #5: Complement component C8 alpha chain
+Macromolecule #6: Complement component C8 gamma chain
+Macromolecule #7: CD59 glycoprotein
+Macromolecule #10: CALCIUM ION
+Macromolecule #11: 2-acetamido-2-deoxy-beta-D-glucopyranose
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 7.5 |
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Grid | Model: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 300 / Support film - Material: GRAPHENE OXIDE / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 60 sec. / Pretreatment - Atmosphere: NITROGEN |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 95 % / Chamber temperature: 294 K / Instrument: FEI VITROBOT MARK IV |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: FEI FALCON IV (4k x 4k) / Digitization - Dimensions - Width: 4096 pixel / Digitization - Dimensions - Height: 4096 pixel / Number grids imaged: 2 / Number real images: 12805 / Average exposure time: 9.8 sec. / Average electron dose: 50.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | C2 aperture diameter: 100.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.4 µm / Nominal defocus min: 0.9 µm |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
+Image processing
-Atomic model buiding 1
Details | Initial rigid body fits were performed using UCSF Chimera and UCSF ChimeraX. Carbohydrates were added using Coot. Models were refined iteratively using Isolde and Phenix Real Space Refine. |
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Refinement | Space: REAL / Protocol: FLEXIBLE FIT / Overall B value: 87 |
Output model | PDB-8b0f: |