+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-11199 | |||||||||
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Title | COPII on membranes, inner coat | |||||||||
Map data | COPII assembled on membranes, inner coat, density modified | |||||||||
Sample |
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Function / homology | Function and homology information Antigen Presentation: Folding, assembly and peptide loading of class I MHC / Cargo concentration in the ER / regulation of COPII vesicle coating / positive regulation of ER to Golgi vesicle-mediated transport / mitochondria-associated endoplasmic reticulum membrane contact site / nuclear envelope organization / COPII-mediated vesicle transport / vesicle organization / COPII-coated vesicle cargo loading / COPII vesicle coat ...Antigen Presentation: Folding, assembly and peptide loading of class I MHC / Cargo concentration in the ER / regulation of COPII vesicle coating / positive regulation of ER to Golgi vesicle-mediated transport / mitochondria-associated endoplasmic reticulum membrane contact site / nuclear envelope organization / COPII-mediated vesicle transport / vesicle organization / COPII-coated vesicle cargo loading / COPII vesicle coat / positive regulation of protein exit from endoplasmic reticulum / membrane organization / signal sequence binding / mitochondrial fission / fungal-type vacuole membrane / mitochondrial membrane organization / reticulophagy / endoplasmic reticulum exit site / endoplasmic reticulum to Golgi vesicle-mediated transport / GTPase activator activity / SNARE binding / macroautophagy / intracellular protein transport / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / Golgi membrane / GTPase activity / endoplasmic reticulum membrane / GTP binding / endoplasmic reticulum / mitochondrion / zinc ion binding Similarity search - Function | |||||||||
Biological species | Saccharomyces cerevisiae (brewer's yeast) / Saccharomyces cerevisiaeaSaccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) / Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) | |||||||||
Method | subtomogram averaging / cryo EM / Resolution: 4.6 Å | |||||||||
Authors | Zanetti G / Hutchings J | |||||||||
Funding support | United Kingdom, 2 items
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Citation | Journal: Nat Commun / Year: 2021 Title: Structure of the complete, membrane-assembled COPII coat reveals a complex interaction network. Authors: Joshua Hutchings / Viktoriya G Stancheva / Nick R Brown / Alan C M Cheung / Elizabeth A Miller / Giulia Zanetti / Abstract: COPII mediates Endoplasmic Reticulum to Golgi trafficking of thousands of cargoes. Five essential proteins assemble into a two-layer architecture, with the inner layer thought to regulate coat ...COPII mediates Endoplasmic Reticulum to Golgi trafficking of thousands of cargoes. Five essential proteins assemble into a two-layer architecture, with the inner layer thought to regulate coat assembly and cargo recruitment, and the outer coat forming cages assumed to scaffold membrane curvature. Here we visualise the complete, membrane-assembled COPII coat by cryo-electron tomography and subtomogram averaging, revealing the full network of interactions within and between coat layers. We demonstrate the physiological importance of these interactions using genetic and biochemical approaches. Mutagenesis reveals that the inner coat alone can provide membrane remodelling function, with organisational input from the outer coat. These functional roles for the inner and outer coats significantly move away from the current paradigm, which posits membrane curvature derives primarily from the outer coat. We suggest these interactions collectively contribute to coat organisation and membrane curvature, providing a structural framework to understand regulatory mechanisms of COPII trafficking and secretion. | |||||||||
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_11199.map.gz | 10 MB | EMDB map data format | |
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Header (meta data) | emd-11199-v30.xml emd-11199.xml | 26.4 KB 26.4 KB | Display Display | EMDB header |
FSC (resolution estimation) | emd_11199_fsc.xml | 7.1 KB | Display | FSC data file |
Images | emd_11199.png | 105 KB | ||
Masks | emd_11199_msk_1.map | 28.7 MB | Mask map | |
Others | emd_11199_additional_1.map.gz emd_11199_half_map_1.map.gz emd_11199_half_map_2.map.gz | 10.1 MB 26.6 MB 26.6 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-11199 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-11199 | HTTPS FTP |
-Validation report
Summary document | emd_11199_validation.pdf.gz | 376.1 KB | Display | EMDB validaton report |
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Full document | emd_11199_full_validation.pdf.gz | 375.3 KB | Display | |
Data in XML | emd_11199_validation.xml.gz | 13 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-11199 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-11199 | HTTPS FTP |
-Related structure data
Related structure data | 6zgaMC 6zg5C 6zg6C 6zl0C 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_11199.map.gz / Format: CCP4 / Size: 28.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | COPII assembled on membranes, inner coat, density modified | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.327 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_11199_msk_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Additional map: COPII assembled on membranes, inner coat, density modified...
File | emd_11199_additional_1.map | ||||||||||||
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Annotation | COPII assembled on membranes, inner coat, density modified and sharpened | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_11199_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #2
File | emd_11199_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Sample components
+Entire : COPII coat assembled on membrane, inner coat
+Supramolecule #1: COPII coat assembled on membrane, inner coat
+Supramolecule #2: Protein transport protein SEC23
+Supramolecule #3: Protein transport protein SEC24
+Supramolecule #4: Small COPII coat GTPase SAR1
+Macromolecule #1: Protein transport protein SEC23
+Macromolecule #2: Protein transport protein SEC24
+Macromolecule #3: Small COPII coat GTPase SAR1
+Macromolecule #4: PRO-PRO-PRO
+Macromolecule #5: Small COPII coat GTPase SAR1
+Macromolecule #6: ZINC ION
+Macromolecule #7: PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER
+Macromolecule #8: MAGNESIUM ION
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | subtomogram averaging |
Aggregation state | 3D array |
-Sample preparation
Buffer | pH: 6.8 |
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Vitrification | Cryogen name: ETHANE |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Specialist optics | Energy filter - Slit width: 20 eV |
Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 3.5 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |