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Yorodumi- EMDB-10769: Structure of a human 48S translational initiation complex - eIF3 -
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Basic information
| Entry | Database: EMDB / ID: EMD-10769 | ||||||||||||
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| Title | Structure of a human 48S translational initiation complex - eIF3 | ||||||||||||
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Keywords | eIF3 / ribosome / translation / initiation complex | ||||||||||||
| Function / homology | Function and homology informationpositive regulation of mRNA binding / viral translational termination-reinitiation / eukaryotic translation initiation factor 3 complex, eIF3e / cap-dependent translational initiation / eukaryotic translation initiation factor 3 complex, eIF3m / IRES-dependent viral translational initiation / translation reinitiation / formation of cytoplasmic translation initiation complex / eukaryotic translation initiation factor 3 complex / cytoplasmic translational initiation ...positive regulation of mRNA binding / viral translational termination-reinitiation / eukaryotic translation initiation factor 3 complex, eIF3e / cap-dependent translational initiation / eukaryotic translation initiation factor 3 complex, eIF3m / IRES-dependent viral translational initiation / translation reinitiation / formation of cytoplasmic translation initiation complex / eukaryotic translation initiation factor 3 complex / cytoplasmic translational initiation / multi-eIF complex / eukaryotic 43S preinitiation complex / mRNA cap binding / eukaryotic 48S preinitiation complex / metal-dependent deubiquitinase activity / negative regulation of RNA splicing / nuclear-transcribed mRNA catabolic process, nonsense-mediated decay / regulation of translational initiation / neural crest cell differentiation / positive regulation of ubiquitin-protein transferase activity / rRNA modification in the nucleus and cytosol / erythrocyte homeostasis / Formation of the ternary complex, and subsequently, the 43S complex / cytoplasmic side of rough endoplasmic reticulum membrane / negative regulation of ubiquitin protein ligase activity / laminin receptor activity / Ribosomal scanning and start codon recognition / Translation initiation complex formation / fibroblast growth factor binding / SARS-CoV-1 modulates host translation machinery / Peptide chain elongation / Selenocysteine synthesis / Formation of a pool of free 40S subunits / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / Eukaryotic Translation Termination / negative regulation of ubiquitin-dependent protein catabolic process / SRP-dependent cotranslational protein targeting to membrane / Response of EIF2AK4 (GCN2) to amino acid deficiency / ubiquitin ligase inhibitor activity / Viral mRNA Translation / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / GTP hydrolysis and joining of the 60S ribosomal subunit / L13a-mediated translational silencing of Ceruloplasmin expression / Major pathway of rRNA processing in the nucleolus and cytosol / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / Protein methylation / endonucleolytic cleavage in ITS1 to separate SSU-rRNA from 5.8S rRNA and LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / laminin binding / rough endoplasmic reticulum / translation regulator activity / translation initiation factor binding / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / negative regulation of translational initiation / translation initiation factor activity / negative regulation of proteasomal ubiquitin-dependent protein catabolic process / antiviral innate immune response / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / cytosolic ribosome / Resolution of Sister Chromatid Cohesion / positive regulation of translation / erythrocyte differentiation / mRNA 3'-UTR binding / maturation of SSU-rRNA / neural tube closure / translational initiation / small-subunit processome / RHO GTPases Activate Formins / PML body / receptor tyrosine kinase binding / negative regulation of ERK1 and ERK2 cascade / mRNA 5'-UTR binding / GABA-ergic synapse / Regulation of expression of SLITs and ROBOs / fibrillar center / RMTs methylate histone arginines / metallopeptidase activity / rRNA processing / Separation of Sister Chromatids / presynapse / ribosome binding / virus receptor activity / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / SARS-CoV-2 modulates host translation machinery / microtubule / ubiquitinyl hydrolase 1 / cytoplasmic translation / cell differentiation / cysteine-type deubiquitinase activity / postsynaptic density / protein stabilization / structural constituent of ribosome / cadherin binding / ribosome / translation Similarity search - Function | ||||||||||||
| Biological species | Homo sapiens (human) | ||||||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.3 Å | ||||||||||||
Authors | Brito Querido J / Sokabe M | ||||||||||||
| Funding support | United Kingdom, United States, 3 items
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Citation | Journal: Science / Year: 2020Title: Structure of a human 48 translational initiation complex. Authors: Jailson Brito Querido / Masaaki Sokabe / Sebastian Kraatz / Yuliya Gordiyenko / J Mark Skehel / Christopher S Fraser / V Ramakrishnan / ![]() Abstract: A key step in translational initiation is the recruitment of the 43 preinitiation complex by the cap-binding complex [eukaryotic initiation factor 4F (eIF4F)] at the 5' end of messenger RNA (mRNA) to ...A key step in translational initiation is the recruitment of the 43 preinitiation complex by the cap-binding complex [eukaryotic initiation factor 4F (eIF4F)] at the 5' end of messenger RNA (mRNA) to form the 48 initiation complex (i.e., the 48). The 48 then scans along the mRNA to locate a start codon. To understand the mechanisms involved, we used cryo-electron microscopy to determine the structure of a reconstituted human 48 The structure reveals insights into early events of translation initiation complex assembly, as well as how eIF4F interacts with subunits of eIF3 near the mRNA exit channel in the 43 The location of eIF4F is consistent with a slotting model of mRNA recruitment and suggests that downstream mRNA is unwound at least in part by being "pulled" through the 40 subunit during scanning. | ||||||||||||
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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_10769.map.gz | 11.4 MB | EMDB map data format | |
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| Header (meta data) | emd-10769-v30.xml emd-10769.xml | 37.9 KB 37.9 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_10769_fsc.xml | 17.7 KB | Display | FSC data file |
| Images | emd_10769.png | 56 KB | ||
| Masks | emd_10769_msk_1.map | 83.7 MB | Mask map | |
| Filedesc metadata | emd-10769.cif.gz | 10 KB | ||
| Others | emd_10769_additional.map.gz emd_10769_half_map_1.map.gz emd_10769_half_map_2.map.gz | 64.3 MB 64.6 MB 64.6 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-10769 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-10769 | HTTPS FTP |
-Validation report
| Summary document | emd_10769_validation.pdf.gz | 422.2 KB | Display | EMDB validaton report |
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| Full document | emd_10769_full_validation.pdf.gz | 421.4 KB | Display | |
| Data in XML | emd_10769_validation.xml.gz | 18.9 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-10769 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-10769 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 6ybdMC ![]() 6ybsC ![]() 6ybtC ![]() 6ybvC ![]() 6ybwC ![]() 6zmwC M: atomic model generated by this map C: citing same article ( |
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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_10769.map.gz / Format: CCP4 / Size: 83.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 1.074 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_10769_msk_1.map | ||||||||||||
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-Additional map: #1
| File | emd_10769_additional.map | ||||||||||||
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-Half map: #1
| File | emd_10769_half_map_1.map | ||||||||||||
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-Half map: #2
| File | emd_10769_half_map_2.map | ||||||||||||
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| Density Histograms |
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Sample components
+Entire : 48S initiation complex
+Supramolecule #1: 48S initiation complex
+Macromolecule #1: Eukaryotic translation initiation factor 3 subunit M
+Macromolecule #2: Eukaryotic translation initiation factor 3 subunit F
+Macromolecule #3: Eukaryotic translation initiation factor 3 subunit A
+Macromolecule #4: Eukaryotic translation initiation factor 3 subunit E
+Macromolecule #5: Eukaryotic translation initiation factor 3 subunit C
+Macromolecule #6: Eukaryotic translation initiation factor 3 subunit H
+Macromolecule #7: 40S ribosomal protein S7
+Macromolecule #8: 40S ribosomal protein S27
+Macromolecule #9: 40S ribosomal protein S21
+Macromolecule #10: 40S ribosomal protein S17
+Macromolecule #11: 40S ribosomal protein S2
+Macromolecule #12: 40S ribosomal protein S3a
+Macromolecule #13: 40S ribosomal protein SA
+Macromolecule #14: 40S ribosomal protein S26
+Macromolecule #15: 40S ribosomal protein S14
+Macromolecule #16: 40S ribosomal protein S13
+Macromolecule #17: Eukaryotic translation initiation factor 3 subunit D
+Macromolecule #18: Eukaryotic translation initiation factor 3 subunit K
+Macromolecule #19: Eukaryotic translation initiation factor 3 subunit L
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Buffer | pH: 7.4 |
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| Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
| Microscope | FEI TITAN KRIOS |
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| Image recording | Film or detector model: FEI FALCON III (4k x 4k) / Detector mode: INTEGRATING / Average exposure time: 1.0 sec. / Average electron dose: 107.0 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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About Yorodumi


Keywords
Homo sapiens (human)
Authors
United Kingdom,
United States, 3 items
Citation
UCSF Chimera





































Z (Sec.)
Y (Row.)
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