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- PDB-6g4s: Cryo-EM structure of a late human pre-40S ribosomal subunit - State B -
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Open data
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Basic information
Entry | Database: PDB / ID: 6g4s | |||||||||||||||
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Title | Cryo-EM structure of a late human pre-40S ribosomal subunit - State B | |||||||||||||||
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![]() | RIBOSOME / 40S / pre-40S / ribosome biogenesis | |||||||||||||||
Function / homology | ![]() regulation of protein localization to nucleolus / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / trophectodermal cell differentiation / positive regulation of respiratory burst involved in inflammatory response / nucleolus organization / negative regulation of RNA splicing / neural crest cell differentiation / positive regulation of ubiquitin-protein transferase activity / rRNA modification in the nucleus and cytosol / Formation of the ternary complex, and subsequently, the 43S complex ...regulation of protein localization to nucleolus / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / trophectodermal cell differentiation / positive regulation of respiratory burst involved in inflammatory response / nucleolus organization / negative regulation of RNA splicing / neural crest cell differentiation / positive regulation of ubiquitin-protein transferase activity / rRNA modification in the nucleus and cytosol / Formation of the ternary complex, and subsequently, the 43S complex / erythrocyte homeostasis / cytoplasmic side of rough endoplasmic reticulum membrane / U3 snoRNA binding / laminin receptor activity / negative regulation of ubiquitin protein ligase activity / Ribosomal scanning and start codon recognition / preribosome, small subunit precursor / Translation initiation complex formation / snoRNA binding / mammalian oogenesis stage / activation-induced cell death of T cells / fibroblast growth factor binding / Protein hydroxylation / monocyte chemotaxis / 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 / Eukaryotic Translation Termination / ubiquitin ligase inhibitor activity / Response of EIF2AK4 (GCN2) to amino acid deficiency / SRP-dependent cotranslational protein targeting to membrane / negative regulation of respiratory burst involved in inflammatory response / Viral mRNA Translation / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / GTP hydrolysis and joining of the 60S ribosomal subunit / TOR signaling / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / L13a-mediated translational silencing of Ceruloplasmin expression / T cell proliferation involved in immune response / Major pathway of rRNA processing in the nucleolus and cytosol / regulation of translational fidelity / erythrocyte development / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / negative regulation of ubiquitin-dependent protein catabolic process / Protein methylation / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / translation regulator activity / Nuclear events stimulated by ALK signaling in cancer / ribosomal small subunit export from nucleus / positive regulation of cell cycle / stress granule assembly / Mitotic Prometaphase / cytosolic ribosome / laminin binding / EML4 and NUDC in mitotic spindle formation / 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) / rough endoplasmic reticulum / antiviral innate immune response / gastrulation / MDM2/MDM4 family protein binding / translation initiation factor binding / Resolution of Sister Chromatid Cohesion / RNA endonuclease activity / visual perception / erythrocyte differentiation / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / innate immune response in mucosa / stem cell proliferation / cellular response to leukemia inhibitory factor / maturation of SSU-rRNA / neural tube closure / small-subunit processome / mRNA 3'-UTR binding / positive regulation of translation / translational initiation / RHO GTPases Activate Formins / liver regeneration / maintenance of translational fidelity / response to virus / placenta development / mRNA 5'-UTR binding / RMTs methylate histone arginines / Regulation of expression of SLITs and ROBOs / cytoplasmic ribonucleoprotein granule / osteoblast differentiation / rRNA processing / G1/S transition of mitotic cell cycle / Separation of Sister Chromatids / antimicrobial humoral immune response mediated by antimicrobial peptide / ribosome biogenesis / apical part of cell / ribosome binding / glucose homeostasis / virus receptor activity / chromosome / ribosomal small subunit biogenesis Similarity search - Function | |||||||||||||||
Biological species | ![]() | |||||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4 Å | |||||||||||||||
![]() | Ameismeier, M. / Cheng, J. / Berninghausen, O. / Beckmann, R. | |||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Visualizing late states of human 40S ribosomal subunit maturation. Authors: Michael Ameismeier / Jingdong Cheng / Otto Berninghausen / Roland Beckmann / ![]() Abstract: The formation of eukaryotic ribosomal subunits extends from the nucleolus to the cytoplasm and entails hundreds of assembly factors. Despite differences in the pathways of ribosome formation, high- ...The formation of eukaryotic ribosomal subunits extends from the nucleolus to the cytoplasm and entails hundreds of assembly factors. Despite differences in the pathways of ribosome formation, high-resolution structural information has been available only from fungi. Here we present cryo-electron microscopy structures of late-stage human 40S assembly intermediates, representing one state reconstituted in vitro and five native states that range from nuclear to late cytoplasmic. The earliest particles reveal the position of the biogenesis factor RRP12 and distinct immature rRNA conformations that accompany the formation of the 40S subunit head. Molecular models of the late-acting assembly factors TSR1, RIOK1, RIOK2, ENP1, LTV1, PNO1 and NOB1 provide mechanistic details that underlie their contribution to a sequential 40S subunit assembly. The NOB1 architecture displays an inactive nuclease conformation that requires rearrangement of the PNO1-bound 3' rRNA, thereby coordinating the final rRNA folding steps with site 3 cleavage. | |||||||||||||||
History |
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 1.3 MB | Display | ![]() |
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PDB format | ![]() | 921.7 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 4348MC ![]() 4337C ![]() 4349C ![]() 4350C ![]() 4351C ![]() 4352C ![]() 4353C ![]() 6g18C ![]() 6g4wC ![]() 6g51C ![]() 6g53C ![]() 6g5hC ![]() 6g5iC M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
+40S ribosomal protein ... , 25 types, 25 molecules RAbBCcEeFHGZYXWVTSQPONLJI
-RNA-binding protein ... , 2 types, 2 molecules yx
#15: Protein | Mass: 46743.914 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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#16: Protein | Mass: 27970.355 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Protein , 4 types, 4 molecules wuts
#18: Protein | Mass: 49673.258 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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#21: Protein | Mass: 91951.188 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#22: Protein | Mass: 54935.891 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#32: Protein | Mass: 68101.625 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-RNA chain / Protein/peptide , 2 types, 2 molecules 2k
#1: RNA chain | Mass: 607057.688 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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#33: Protein/peptide | Mass: 2790.050 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-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: Cryo-EM structure of a late human pre-40S ribosomal subunit - State B Type: RIBOSOME / Entity ID: all / Source: NATURAL |
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Molecular weight | Experimental value: NO |
Source (natural) | Organism: ![]() |
Buffer solution | pH: 7.6 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
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: ![]() |
Electron lens | Mode: BRIGHT FIELD |
Image recording | Electron dose: 2.5 e/Å2 / Film or detector model: FEI FALCON II (4k x 4k) |
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Processing
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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3D reconstruction | Resolution: 4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 73661 / Symmetry type: POINT |