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Open data
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Basic information
| Entry | Database: EMDB / ID: EMD-12063 | |||||||||
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| Title | Whole MiniTRAPPIII | |||||||||
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Keywords | Rab1 / GEFs / Golgi / TRAPP complexes / EXOCYTOSIS | |||||||||
| Function / homology | Function and homology informationCOPII-mediated vesicle transport / RAB GEFs exchange GTP for GDP on RABs / TRAPPI protein complex / TRAPPII protein complex / TRAPPIII protein complex / TRAPP complex / cis-Golgi network membrane / Golgi vesicle transport / Neutrophil degranulation / cis-Golgi network ...COPII-mediated vesicle transport / RAB GEFs exchange GTP for GDP on RABs / TRAPPI protein complex / TRAPPII protein complex / TRAPPIII protein complex / TRAPP complex / cis-Golgi network membrane / Golgi vesicle transport / Neutrophil degranulation / cis-Golgi network / intra-Golgi vesicle-mediated transport / protein secretion / long-term memory / endoplasmic reticulum to Golgi vesicle-mediated transport / intracellular transport / vesicle-mediated transport / trans-Golgi network / spermatogenesis / perinuclear region of cytoplasm / endoplasmic reticulum / Golgi apparatus / nucleus / cytoplasm / cytosol Similarity search - Function | |||||||||
| Biological species | ![]() | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 4.0 Å | |||||||||
Authors | Galindo A / Munro S | |||||||||
Citation | Journal: EMBO J / Year: 2021Title: Cryo-EM structure of metazoan TRAPPIII, the multi-subunit complex that activates the GTPase Rab1. Authors: Antonio Galindo / Vicente J Planelles-Herrero / Gianluca Degliesposti / Sean Munro / ![]() Abstract: The TRAPP complexes are nucleotide exchange factors that play essential roles in membrane traffic and autophagy. TRAPPII activates Rab11, and TRAPPIII activates Rab1, with the two complexes sharing a ...The TRAPP complexes are nucleotide exchange factors that play essential roles in membrane traffic and autophagy. TRAPPII activates Rab11, and TRAPPIII activates Rab1, with the two complexes sharing a core of small subunits that affect nucleotide exchange but being distinguished by specific large subunits that are essential for activity in vivo. Crystal structures of core subunits have revealed the mechanism of Rab activation, but how the core and the large subunits assemble to form the complexes is unknown. We report a cryo-EM structure of the entire Drosophila TRAPPIII complex. The TRAPPIII-specific subunits TRAPPC8 and TRAPPC11 hold the catalytic core like a pair of tongs, with TRAPPC12 and TRAPPC13 positioned at the joint between them. TRAPPC2 and TRAPPC2L link the core to the two large arms, with the interfaces containing residues affected by disease-causing mutations. The TRAPPC8 arm is positioned such that it would contact Rab1 that is bound to the core, indicating how the arm could determine the specificity of the complex. A lower resolution structure of TRAPPII shows a similar architecture and suggests that the TRAPP complexes evolved from a single ur-TRAPP. | |||||||||
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Structure visualization
| Movie |
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| Structure viewer | EM map: SurfView Molmil Jmol/JSmol |
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Downloads & links
-EMDB archive
| Map data | emd_12063.map.gz | 228.4 MB | EMDB map data format | |
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| Header (meta data) | emd-12063-v30.xml emd-12063.xml | 23.5 KB 23.5 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_12063_fsc.xml | 14.1 KB | Display | FSC data file |
| Images | emd_12063.png | 247.2 KB | ||
| Masks | emd_12063_msk_1.map | 244.1 MB | Mask map | |
| Filedesc metadata | emd-12063.cif.gz | 7.6 KB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-12063 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-12063 | HTTPS FTP |
-Validation report
| Summary document | emd_12063_validation.pdf.gz | 637.9 KB | Display | EMDB validaton report |
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| Full document | emd_12063_full_validation.pdf.gz | 637.5 KB | Display | |
| Data in XML | emd_12063_validation.xml.gz | 13.5 KB | Display | |
| Data in CIF | emd_12063_validation.cif.gz | 18.4 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-12063 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-12063 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 7b70MC ![]() 7b6dC ![]() 7b6eC ![]() 7b6hC ![]() 7b6rC ![]() 7b6xC ![]() 7b6yC ![]() 7b6zC C: citing same article ( M: atomic model generated by this map |
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| Similar structure data |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_12063.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Voxel size | X=Y=Z: 1.2564 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_12063_msk_1.map | ||||||||||||
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| Density Histograms |
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Sample components
+Entire : MiniTRAPPIII: TRAPPIII complex without the C12 and C13 specific s...
+Supramolecule #1: MiniTRAPPIII: TRAPPIII complex without the C12 and C13 specific s...
+Macromolecule #1: Trafficking protein particle complex subunit
+Macromolecule #2: GEO08327p1
+Macromolecule #3: Trafficking protein particle complex subunit
+Macromolecule #4: Trafficking protein particle complex subunit
+Macromolecule #5: Probable trafficking protein particle complex subunit 2
+Macromolecule #6: Trafficking protein particle complex subunit 5
+Macromolecule #7: TRAPPC2L
+Macromolecule #8: FI18195p1
+Macromolecule #9: Trafficking protein particle complex subunit 11
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Concentration | 0.5 mg/mL | ||||||||||
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| Buffer | pH: 7.4 Component:
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| Grid | Model: Quantifoil / Material: COPPER / Mesh: 400 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 45 sec. / Pretreatment - Atmosphere: AIR / Pretreatment - Pressure: 0.001 kPa | ||||||||||
| Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 285.15 K / Instrument: FEI VITROBOT MARK III |
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Electron microscopy
| Microscope | FEI TITAN KRIOS |
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| Image recording | Film or detector model: GATAN K2 QUANTUM (4k x 4k) / Detector mode: COUNTING / Number grids imaged: 1 / Number real images: 3443 / Average exposure time: 0.3 sec. / Average electron dose: 45.6 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: 2.5 µm / Nominal defocus min: 1.5 µm / Nominal magnification: 105000 |
| Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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