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Yorodumi- PDB-7tql: CryoEM structure of the human 40S small ribosomal subunit in comp... -
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Basic information
| Entry | Database: PDB / ID: 7tql | ||||||||||||
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| Title | CryoEM structure of the human 40S small ribosomal subunit in complex with translation initiation factors eIF1A and eIF5B. | ||||||||||||
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Keywords | RIBOSOME / eIF5B / translation / initiation / eIF1A | ||||||||||||
| Function / homology | Function and homology informationnegative regulation of endoplasmic reticulum unfolded protein response / oxidized pyrimidine DNA binding / response to TNF agonist / positive regulation of base-excision repair / positive regulation of respiratory burst involved in inflammatory response / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage / positive regulation of gastrulation / protein tyrosine kinase inhibitor activity / positive regulation of endodeoxyribonuclease activity / IRE1-RACK1-PP2A complex ...negative regulation of endoplasmic reticulum unfolded protein response / oxidized pyrimidine DNA binding / response to TNF agonist / positive regulation of base-excision repair / positive regulation of respiratory burst involved in inflammatory response / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage / positive regulation of gastrulation / protein tyrosine kinase inhibitor activity / positive regulation of endodeoxyribonuclease activity / IRE1-RACK1-PP2A complex / nucleolus organization / positive regulation of Golgi to plasma membrane protein transport / TNFR1-mediated ceramide production / negative regulation of DNA repair / negative regulation of RNA splicing / protein-synthesizing GTPase / supercoiled DNA binding / neural crest cell differentiation / regulation of translational initiation / NF-kappaB complex / cysteine-type endopeptidase activator activity involved in apoptotic process / oxidized purine DNA binding / positive regulation of ubiquitin-protein transferase activity / negative regulation of intrinsic apoptotic signaling pathway in response to hydrogen peroxide / regulation of establishment of cell polarity / negative regulation of bicellular tight junction assembly / ubiquitin-like protein conjugating enzyme binding / 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 / negative regulation of ubiquitin protein ligase activity / protein kinase A binding / ion channel inhibitor activity / Ribosomal scanning and start codon recognition / pigmentation / Translation initiation complex formation / positive regulation of mitochondrial depolarization / positive regulation of T cell receptor signaling pathway / negative regulation of Wnt signaling pathway / fibroblast growth factor binding / monocyte chemotaxis / positive regulation of activated T cell proliferation / negative regulation of translational frameshifting / TOR signaling / Protein hydroxylation / BH3 domain binding / SARS-CoV-1 modulates host translation machinery / regulation of adenylate cyclase-activating G protein-coupled receptor signaling pathway / iron-sulfur cluster binding / regulation of cell division / cellular response to ethanol / mTORC1-mediated signalling / 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 / ubiquitin ligase inhibitor activity / positive regulation of GTPase activity / SRP-dependent cotranslational protein targeting to membrane / Response of EIF2AK4 (GCN2) to amino acid deficiency / protein serine/threonine kinase inhibitor activity / negative regulation of ubiquitin-dependent protein catabolic process / positive regulation of signal transduction by p53 class mediator / Viral mRNA Translation / negative regulation of respiratory burst involved in inflammatory response / 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 / phagocytic cup / regulation of translational fidelity / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / negative regulation of protein binding / Protein methylation / Nuclear events stimulated by ALK signaling in cancer / positive regulation of intrinsic apoptotic signaling pathway / spindle assembly / rough endoplasmic reticulum / 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) / translation regulator activity / ribosomal small subunit export from nucleus / positive regulation of cell cycle / gastrulation / translation initiation factor binding / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / DNA-(apurinic or apyrimidinic site) endonuclease activity / Maturation of protein E / Maturation of protein E / signaling adaptor activity / MDM2/MDM4 family protein binding / translation initiation factor activity / positive regulation of microtubule polymerization / ER Quality Control Compartment (ERQC) / Myoclonic epilepsy of Lafora / FLT3 signaling by CBL mutants / negative regulation of protein ubiquitination Similarity search - Function | ||||||||||||
| Biological species | Homo sapiens (human) | ||||||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å | ||||||||||||
Authors | Lapointe, C.P. / Grosely, R. / Sokabe, M. / Alvarado, C. / Wang, J. / Montabana, E. / Villa, N. / Shin, B. / Dever, T. / Fraser, C. ...Lapointe, C.P. / Grosely, R. / Sokabe, M. / Alvarado, C. / Wang, J. / Montabana, E. / Villa, N. / Shin, B. / Dever, T. / Fraser, C. / Fernandez, I.S. / Puglisi, J.D. | ||||||||||||
| Funding support | United States, Sweden, 3items
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Citation | Journal: Nature / Year: 2022Title: eIF5B and eIF1A reorient initiator tRNA to allow ribosomal subunit joining. Authors: Christopher P Lapointe / Rosslyn Grosely / Masaaki Sokabe / Carlos Alvarado / Jinfan Wang / Elizabeth Montabana / Nancy Villa / Byung-Sik Shin / Thomas E Dever / Christopher S Fraser / ...Authors: Christopher P Lapointe / Rosslyn Grosely / Masaaki Sokabe / Carlos Alvarado / Jinfan Wang / Elizabeth Montabana / Nancy Villa / Byung-Sik Shin / Thomas E Dever / Christopher S Fraser / Israel S Fernández / Joseph D Puglisi / ![]() Abstract: Translation initiation defines the identity and quantity of a synthesized protein. The process is dysregulated in many human diseases. A key commitment step is when the ribosomal subunits join at a ...Translation initiation defines the identity and quantity of a synthesized protein. The process is dysregulated in many human diseases. A key commitment step is when the ribosomal subunits join at a translation start site on a messenger RNA to form a functional ribosome. Here, we combined single-molecule spectroscopy and structural methods using an in vitro reconstituted system to examine how the human ribosomal subunits join. Single-molecule fluorescence revealed when the universally conserved eukaryotic initiation factors eIF1A and eIF5B associate with and depart from initiation complexes. Guided by single-molecule dynamics, we visualized initiation complexes that contained both eIF1A and eIF5B using single-particle cryo-electron microscopy. The resulting structure revealed how eukaryote-specific contacts between the two proteins remodel the initiation complex to orient the initiator aminoacyl-tRNA in a conformation compatible with ribosomal subunit joining. Collectively, our findings provide a quantitative and architectural framework for the molecular choreography orchestrated by eIF1A and eIF5B during translation initiation in humans. | ||||||||||||
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Structure visualization
| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 7tql.cif.gz | 2 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb7tql.ent.gz | 1.6 MB | Display | PDB format |
| PDBx/mmJSON format | 7tql.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/tq/7tql ftp://data.pdbj.org/pub/pdb/validation_reports/tq/7tql | HTTPS FTP |
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-Related structure data
| Related structure data | ![]() 26067MC M: map data used to model this data C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
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Assembly
| Deposited unit | ![]()
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Components
-Protein , 4 types, 4 molecules 14Yj
| #1: Protein | Mass: 69868.062 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: EIF5B, IF2, KIAA0741 / Production host: ![]() |
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| #4: Protein | Mass: 10384.011 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human) |
| #27: Protein | Mass: 14361.046 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPS24 / Production host: Homo sapiens (human) / References: UniProt: P62847 |
| #37: Protein | Mass: 34726.164 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RACK1, GNB2L1, HLC7, PIG21 / Production host: Homo sapiens (human) / References: UniProt: P63244 |
-RNA chain , 2 types, 2 molecules 23
| #2: RNA chain | Mass: 534544.750 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human) |
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| #3: RNA chain | Mass: 24231.510 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human) / References: GenBank: 174924 |
-Ribosomal protein ... , 12 types, 13 molecules BCNOPSTVadefh
| #5: Protein | Mass: 47843.590 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)#16: Protein | | Mass: 16340.327 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)#17: Protein | | Mass: 13347.567 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)#18: Protein | | Mass: 14344.424 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)#21: Protein | | Mass: 15250.714 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)#22: Protein | | Mass: 16496.223 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)#24: Protein | | Mass: 11508.648 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)#29: Protein | | Mass: 8182.693 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)#32: Protein | | Mass: 6451.396 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)#33: Protein | | Mass: 5640.648 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)#34: Protein | | Mass: 6502.573 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)#36: Protein/peptide | | Mass: 2683.481 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human) |
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-40S ribosomal protein ... , 19 types, 19 molecules DEFGHIJKLMQRUWXZbcg
| #6: Protein | Mass: 24091.453 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPS2, RPS4 / Production host: Homo sapiens (human) / References: UniProt: P15880 |
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| #7: Protein | Mass: 29164.336 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPS4X, CCG2, RPS4, SCAR / Production host: Homo sapiens (human) / References: UniProt: P62701 |
| #8: Protein | Mass: 24970.289 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPS3, OK/SW-cl.26 / Production host: Homo sapiens (human)References: UniProt: P23396, DNA-(apurinic or apyrimidinic site) lyase |
| #9: Protein | Mass: 26157.934 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPS6, OK/SW-cl.2 / Production host: Homo sapiens (human) / References: UniProt: P62753 |
| #10: Protein | Mass: 21187.762 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPS7 / Production host: Homo sapiens (human) / References: UniProt: P62081 |
| #11: Protein | Mass: 23945.959 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPS8, OK/SW-cl.83 / Production host: Homo sapiens (human) / References: UniProt: P62241 |
| #12: Protein | Mass: 21279.271 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPS9 / Production host: Homo sapiens (human) / References: UniProt: P46781 |
| #13: Protein | Mass: 21327.723 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPS5 / Production host: Homo sapiens (human) / References: UniProt: P46782 |
| #14: Protein | Mass: 17170.248 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPS11 / Production host: Homo sapiens (human) / References: UniProt: P62280 |
| #15: Protein | Mass: 11616.760 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPS10 / Production host: Homo sapiens (human) / References: UniProt: A0A2R8Y7H1 |
| #19: Protein | Mass: 13586.022 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPS15, RIG / Production host: Homo sapiens (human) / References: UniProt: P62841 |
| #20: Protein | Mass: 15765.480 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPS16 / Production host: Homo sapiens (human) / References: UniProt: P62249 |
| #23: Protein | Mass: 15409.689 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPS19 / Production host: Homo sapiens (human) / References: UniProt: P39019 |
| #25: Protein | Mass: 14734.357 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPS15A, OK/SW-cl.82 / Production host: Homo sapiens (human) / References: UniProt: P62244 |
| #26: Protein | Mass: 15626.392 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPS23 / Production host: Homo sapiens (human) / References: UniProt: P62266 |
| #28: Protein | Mass: 8977.214 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPS21 / Production host: Homo sapiens (human) / References: UniProt: P63220 |
| #30: Protein | Mass: 9210.843 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPS27, MPS1 / Production host: Homo sapiens (human) / References: UniProt: P42677 |
| #31: Protein | Mass: 11341.426 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPS26 / Production host: Homo sapiens (human) / References: UniProt: P62854 |
| #35: Protein | Mass: 7623.009 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPS27A, UBA80, UBCEP1 / Production host: Homo sapiens (human) / References: UniProt: P62979 |
-Non-polymers , 3 types, 5 molecules 




| #38: Chemical | ChemComp-GNP / |
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| #39: Chemical | ChemComp-5GP / |
| #40: Chemical |
-Details
| Has ligand of interest | Y |
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-Experimental details
-Experiment
| Experiment | Method: ELECTRON MICROSCOPY |
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| EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
| Component | Name: human 40S ribosomal subunit in complex with eIF1A and eIF5B Type: CELL / Entity ID: #2-#30, #32-#33, #36-#37 / Source: MULTIPLE SOURCES |
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| Source (natural) | Organism: Homo sapiens (human) |
| Buffer solution | pH: 7.2 |
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
| Specimen support | Grid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R2/2 |
| Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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| Microscopy | Model: FEI TITAN KRIOS |
| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: OTHER |
| Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 500 nm / Cs: 2.7 mm / C2 aperture diameter: 50 µm |
| Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
| Image recording | Electron dose: 70 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
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Processing
| Software | Name: REFMAC / Version: 5.8.0267 / Classification: refinement | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| CTF correction | Type: NONE | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 3D reconstruction | Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 190000 / Symmetry type: POINT | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Refinement | Resolution: 3.2→237.11 Å / Cor.coef. Fo:Fc: 0.964 / SU B: 23.665 / SU ML: 0.345 / ESU R: 0.539 Stereochemistry target values: MAXIMUM LIKELIHOOD WITH PHASES Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
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| Solvent computation | Ion probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Displacement parameters | Biso mean: 131.797 Å2
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| Refinement step | Cycle: 1 / Total: 80976 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Refine LS restraints |
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Homo sapiens (human)
United States,
Sweden, 3items
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gel filtration
