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Yorodumi- PDB-7qp6: Structure of the human 48S initiation complex in open state (h48S... -
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-Basic information
Entry | Database: PDB / ID: 7qp6 | |||||||||
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Title | Structure of the human 48S initiation complex in open state (h48S AUG open) | |||||||||
Components |
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Keywords | RIBOSOME / 48S / initiation / eIF3 / ternary complex / translation / open state | |||||||||
Function / homology | Function and homology information male germ cell proliferation / positive regulation of mRNA binding / regulation of translation in response to endoplasmic reticulum stress / translation initiation ternary complex / glial limiting end-foot / positive regulation of mRNA cis splicing, via spliceosome / HRI-mediated signaling / response to kainic acid / Cellular response to mitochondrial stress / viral translational termination-reinitiation ...male germ cell proliferation / positive regulation of mRNA binding / regulation of translation in response to endoplasmic reticulum stress / translation initiation ternary complex / glial limiting end-foot / positive regulation of mRNA cis splicing, via spliceosome / HRI-mediated signaling / response to kainic acid / Cellular response to mitochondrial stress / viral translational termination-reinitiation / response to manganese-induced endoplasmic reticulum stress / positive regulation of type B pancreatic cell apoptotic process / negative regulation of translational initiation in response to stress / eukaryotic translation initiation factor 3 complex, eIF3e / Response of EIF2AK1 (HRI) to heme deficiency / Recycling of eIF2:GDP / cap-dependent translational initiation / eukaryotic translation initiation factor 3 complex, eIF3m / PERK-mediated unfolded protein response / methionyl-initiator methionine tRNA binding / PERK regulates gene expression / IRES-dependent viral translational initiation / translation reinitiation / regulation of translational initiation in response to stress / eukaryotic translation initiation factor 2 complex / eukaryotic translation initiation factor 3 complex / formation of cytoplasmic translation initiation complex / multi-eIF complex / cytoplasmic translational initiation / translation factor activity, RNA binding / protein-synthesizing GTPase / mRNA cap binding / eukaryotic 43S preinitiation complex / formation of translation preinitiation complex / : / negative regulation of endoplasmic reticulum unfolded protein response / oxidized pyrimidine DNA binding / response to TNF agonist / positive regulation of base-excision repair / protein tyrosine kinase inhibitor activity / positive regulation of respiratory burst involved in inflammatory response / eukaryotic 48S preinitiation complex / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage / positive regulation of gastrulation / nucleolus organization / regulation of adenylate cyclase-activating G protein-coupled receptor signaling pathway / IRE1-RACK1-PP2A complex / positive regulation of endodeoxyribonuclease activity / positive regulation of Golgi to plasma membrane protein transport / TNFR1-mediated ceramide production / negative regulation of RNA splicing / negative regulation of DNA repair / metal-dependent deubiquitinase activity / negative regulation of intrinsic apoptotic signaling pathway in response to hydrogen peroxide / supercoiled DNA binding / oxidized purine DNA binding / neural crest cell differentiation / NF-kappaB complex / ubiquitin-like protein conjugating enzyme binding / regulation of translational initiation / regulation of establishment of cell polarity / positive regulation of ubiquitin-protein transferase activity / negative regulation of phagocytosis / 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 / nuclear-transcribed mRNA catabolic process, nonsense-mediated decay / laminin receptor activity / pigmentation / protein kinase A binding / negative regulation of ubiquitin protein ligase activity / Ribosomal scanning and start codon recognition / ion channel inhibitor activity / Translation initiation complex formation / mammalian oogenesis stage / fibroblast growth factor binding / positive regulation of mitochondrial depolarization / activation-induced cell death of T cells / positive regulation of T cell receptor signaling pathway / negative regulation of peptidyl-serine phosphorylation / iron-sulfur cluster binding / negative regulation of Wnt signaling pathway / positive regulation of activated T cell proliferation / monocyte chemotaxis / Protein hydroxylation / regulation of cell division / BH3 domain binding / cysteine-type endopeptidase activator activity involved in apoptotic process / mTORC1-mediated signalling / SARS-CoV-1 modulates host translation machinery / Peptide chain elongation / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / Selenocysteine synthesis / positive regulation of signal transduction by p53 class mediator / Formation of a pool of free 40S subunits / ubiquitin ligase inhibitor activity / Eukaryotic Translation Termination / phagocytic cup / ribosomal small subunit binding Similarity search - Function | |||||||||
Biological species | Homo sapiens (human) | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.7 Å | |||||||||
Authors | Yi, S.-H. / Petrychenko, V. / Schliep, J.E. / Goyal, A. / Linden, A. / Chari, A. / Urlaub, H. / Stark, H. / Rodnina, M.V. / Adio, S. / Fischer, N. | |||||||||
Funding support | Germany, 2items
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Citation | Journal: Nucleic Acids Res / Year: 2022 Title: Conformational rearrangements upon start codon recognition in human 48S translation initiation complex. Authors: Sung-Hui Yi / Valentyn Petrychenko / Jan Erik Schliep / Akanksha Goyal / Andreas Linden / Ashwin Chari / Henning Urlaub / Holger Stark / Marina V Rodnina / Sarah Adio / Niels Fischer / Abstract: Selection of the translation start codon is a key step during protein synthesis in human cells. We obtained cryo-EM structures of human 48S initiation complexes and characterized the intermediates of ...Selection of the translation start codon is a key step during protein synthesis in human cells. We obtained cryo-EM structures of human 48S initiation complexes and characterized the intermediates of codon recognition by kinetic methods using eIF1A as a reporter. Both approaches capture two distinct ribosome populations formed on an mRNA with a cognate AUG codon in the presence of eIF1, eIF1A, eIF2-GTP-Met-tRNAiMet and eIF3. The 'open' 40S subunit conformation differs from the human 48S scanning complex and represents an intermediate preceding the codon recognition step. The 'closed' form is similar to reported structures of complexes from yeast and mammals formed upon codon recognition, except for the orientation of eIF1A, which is unique in our structure. Kinetic experiments show how various initiation factors mediate the population distribution of open and closed conformations until 60S subunit docking. Our results provide insights into the timing and structure of human translation initiation intermediates and suggest the differences in the mechanisms of start codon selection between mammals and yeast. | |||||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 7qp6.cif.gz | 2.5 MB | Display | PDBx/mmCIF format |
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PDB format | pdb7qp6.ent.gz | Display | PDB format | |
PDBx/mmJSON format | 7qp6.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Summary document | 7qp6_validation.pdf.gz | 1.7 MB | Display | wwPDB validaton report |
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Full document | 7qp6_full_validation.pdf.gz | 1.7 MB | Display | |
Data in XML | 7qp6_validation.xml.gz | 247.6 KB | Display | |
Data in CIF | 7qp6_validation.cif.gz | 424.8 KB | Display | |
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/qp/7qp6 ftp://data.pdbj.org/pub/pdb/validation_reports/qp/7qp6 | HTTPS FTP |
-Related structure data
Related structure data | 14113MC 7qp7C M: map data used to model this data C: citing same article (ref.) |
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Similar structure data | Similarity search - Function & homologyF&H Search |
EM raw data | EMPIAR-11005 (Title: Conformational rearrangements upon start codon recognition in human 48S translation initiation complex Data size: 1.1 TB Data #1: Motion-corrected, dose-weighted micrographs [micrographs - single frame] Data #2: Particles of human 48S IC in open state ("open") [picked particles - single frame - processed] Data #3: Particles of human 48S IC in closed state ("closed") [picked particles - single frame - processed]) |
-Links
-Assembly
Deposited unit |
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1 |
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-Components
-Eukaryotic translation initiation factor ... , 16 types, 16 molecules 134568opqrstuvxy
#1: Protein | Mass: 92464.297 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P55884 |
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#2: Protein | Mass: 25083.619 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9UBQ5 |
#3: Protein | Mass: 37593.645 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O00303, ubiquitinyl hydrolase 1 |
#4: Protein | Mass: 66803.734 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9Y262 |
#5: Protein | Mass: 42555.832 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q7L2H7 |
#7: Protein | Mass: 39979.277 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O15372 |
#43: Protein | Mass: 35662.016 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O75821 |
#44: Protein | Mass: 12752.498 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: EIF1, SUI1 / Production host: Escherichia coli (E. coli) / References: UniProt: P41567 |
#45: Protein | Mass: 16488.449 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: EIF1AX, EIF1A, EIF4C / Production host: Escherichia coli (E. coli) / References: UniProt: P47813 |
#46: Protein | Mass: 36161.180 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P05198 |
#47: Protein | Mass: 38454.484 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P20042 |
#48: Protein | Mass: 51178.406 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P41091, protein-synthesizing GTPase |
#49: Protein | Mass: 166903.781 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q14152 |
#50: Protein | Mass: 52281.633 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P60228 |
#52: Protein | Mass: 64060.758 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O15371 |
#53: Protein | Mass: 105503.945 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q99613 |
-RNA chain , 3 types, 3 molecules 7Aw
#6: RNA chain | Mass: 6539.160 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) |
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#9: RNA chain | Mass: 603102.312 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) |
#51: RNA chain | Mass: 24231.510 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: GenBank: 174924 |
-Protein/peptide , 1 types, 1 molecules 9
#8: Protein/peptide | Mass: 3473.451 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P62945 |
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+40S ribosomal protein ... , 31 types, 31 molecules BCDEFGHIJKLMNOPQRSTVYZabdefhimn
-Protein , 2 types, 2 molecules ck
#34: Protein | Mass: 35115.652 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P63244 |
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#40: Protein | Mass: 18004.041 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P62979 |
-Non-polymers , 2 types, 4 molecules
#54: Chemical | #55: Chemical | |
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-Details
Has ligand of interest | N |
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Has protein modification | Y |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
-Sample preparation
Component | Name: Human 48S initiation complex 40S-eIF1-eIF1A-eIF2-eIF3-tRNA-Met-mRNA Type: RIBOSOME / Entity ID: #1-#53 / Source: MULTIPLE SOURCES |
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Buffer solution | pH: 7.5 Details: 20 mM Hepes, pH 7.5, 95 mM KOAc, 3.75 mM Mg(OAc)2, 1 mM ATP, 0.5 mM GTP, 0.25 mM spermidine, 2 mM DTT, 0.4 U/uL RiboLock RNase inhibitor |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Grid material: COPPER / Grid type: Quantifoil R3.5/1 |
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K Details: Cryo-EM grids were prepared by floating home-made continuous carbon on 40 ul sample in the wells of teflon block (custom-made). The sample-covered carbon was then adsorbed to an EM grid. |
-Electron microscopy imaging
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS Details: Aberration corrections performed using Cs image corrector (CEOS company) |
Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 59000 X / Nominal defocus max: 4000 nm / Nominal defocus min: 1500 nm / Cs: 0.01 mm / Alignment procedure: ZEMLIN TABLEAU |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Average exposure time: 1 sec. / Electron dose: 48 e/Å2 / Detector mode: INTEGRATING / Film or detector model: FEI FALCON III (4k x 4k) / Num. of grids imaged: 1 / Num. of real images: 15544 |
Image scans | Width: 4096 / Height: 4096 |
-Processing
Software | Name: UCSF ChimeraX / Version: 1.3/v9 / Classification: model building / URL: https://www.rbvi.ucsf.edu/chimerax/ / Os: Windows / Type: package | ||||||||||||||||||||||||||||||||||||||||||||||||
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EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 990486 | ||||||||||||||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 4.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 57184 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||||||||||
Atomic model building | Protocol: FLEXIBLE FIT / Space: REAL / Target criteria: RSCC | ||||||||||||||||||||||||||||||||||||||||||||||||
Atomic model building | PDB-ID: 6ZMW Accession code: 6ZMW / Source name: PDB / Type: experimental model |