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- EMDB-4349: Cryo-EM structure of a late human pre-40S ribosomal subunit - State A -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-4349 | |||||||||||||||
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Title | Cryo-EM structure of a late human pre-40S ribosomal subunit - State A | |||||||||||||||
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![]() | 40S / pre-40S / ribosome biogenesis / RIBOSOME | |||||||||||||||
Function / homology | ![]() peptidyl-glutamine methylation / regulation of protein localization to nucleolus / rRNA (guanine-N7)-methylation / tRNA methyltransferase activator activity / rRNA (guanine) methyltransferase activity / tRNA modification in the nucleus and cytosol / Methylation / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / trophectodermal cell differentiation / protein methyltransferase activity ...peptidyl-glutamine methylation / regulation of protein localization to nucleolus / rRNA (guanine-N7)-methylation / tRNA methyltransferase activator activity / rRNA (guanine) methyltransferase activity / tRNA modification in the nucleus and cytosol / Methylation / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / trophectodermal cell differentiation / protein methyltransferase activity / positive regulation of rRNA processing / positive regulation of respiratory burst involved in inflammatory response / nucleolus organization / : / tRNA methylation / negative regulation of RNA splicing / neural crest cell differentiation / rRNA methylation / Formation of the ternary complex, and subsequently, the 43S complex / rRNA modification in the nucleus and cytosol / erythrocyte homeostasis / cytoplasmic side of rough endoplasmic reticulum membrane / U3 snoRNA binding / Translation initiation complex formation / Ribosomal scanning and start codon recognition / negative regulation of ubiquitin protein ligase activity / preribosome, small subunit precursor / mammalian oogenesis stage / snoRNA binding / activation-induced cell death of T cells / fibroblast growth factor binding / Protein hydroxylation / mTORC1-mediated signalling / SARS-CoV-1 modulates host translation machinery / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / Peptide chain elongation / monocyte chemotaxis / Selenocysteine synthesis / positive regulation of signal transduction by p53 class mediator / ubiquitin ligase inhibitor activity / Formation of a pool of free 40S subunits / Eukaryotic Translation Termination / Response of EIF2AK4 (GCN2) to amino acid deficiency / SRP-dependent cotranslational protein targeting to membrane / negative regulation of respiratory burst involved in inflammatory response / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / Viral mRNA Translation / L13a-mediated translational silencing of Ceruloplasmin expression / GTP hydrolysis and joining of the 60S ribosomal subunit / TOR signaling / T cell proliferation involved in immune response / Major pathway of rRNA processing in the nucleolus and cytosol / regulation of translational fidelity / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / ribosomal small subunit export from nucleus / erythrocyte development / translation regulator activity / Nuclear events stimulated by ALK signaling in cancer / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / cytosolic ribosome / positive regulation of cell cycle / stress granule assembly / Mitotic Prometaphase / rough endoplasmic reticulum / EML4 and NUDC in mitotic spindle formation / gastrulation / MDM2/MDM4 family protein binding / transcription initiation-coupled chromatin remodeling / translation initiation factor binding / Resolution of Sister Chromatid Cohesion / translational initiation / negative regulation of ubiquitin-dependent protein catabolic process / 90S preribosome / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / erythrocyte differentiation / Transferases; Transferring one-carbon groups; Methyltransferases / innate immune response in mucosa / cellular response to leukemia inhibitory factor / stem cell proliferation / methyltransferase activity / maturation of SSU-rRNA / mRNA 3'-UTR binding / neural tube closure / positive regulation of translation / RHO GTPases Activate Formins / liver regeneration / small-subunit processome / maintenance of translational fidelity / response to virus / placenta development / mRNA 5'-UTR binding / Regulation of expression of SLITs and ROBOs / cytoplasmic ribonucleoprotein granule / G1/S transition of mitotic cell cycle / osteoblast differentiation / rRNA processing / Separation of Sister Chromatids / antimicrobial humoral immune response mediated by antimicrobial peptide / ribosome biogenesis / apical part of cell Similarity search - Function | |||||||||||||||
Biological species | ![]() | |||||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 4.5 Å | |||||||||||||||
![]() | Ameismeier M / Cheng J | |||||||||||||||
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
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 15.9 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 45 KB 45 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 12.9 KB | Display | ![]() |
Images | ![]() | 144.7 KB | ||
Filedesc metadata | ![]() | 10.3 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 253.2 KB | Display | ![]() |
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Full document | ![]() | 252.3 KB | Display | |
Data in XML | ![]() | 13.2 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6g4wMC ![]() 4337C ![]() 4348C ![]() 4350C ![]() 4351C ![]() 4352C ![]() 4353C ![]() 6g18C ![]() 6g4sC ![]() 6g51C ![]() 6g53C ![]() 6g5hC ![]() 6g5iC 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 | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Voxel size | X=Y=Z: 1.084 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
+Entire : Cryo-EM structure of a late human pre-40S ribosomal subunit - State A
+Supramolecule #1: Cryo-EM structure of a late human pre-40S ribosomal subunit - State A
+Macromolecule #1: 18S ribosomal RNA
+Macromolecule #2: 40S ribosomal protein S17
+Macromolecule #3: 40S ribosomal protein S27
+Macromolecule #4: 40S ribosomal protein S3a
+Macromolecule #5: 40S ribosomal protein S28
+Macromolecule #6: 40S ribosomal protein S4, X isoform
+Macromolecule #7: 40S ribosomal protein S30
+Macromolecule #8: 40S ribosomal protein S5
+Macromolecule #9: 40S ribosomal protein S7
+Macromolecule #10: 40S ribosomal protein S6
+Macromolecule #11: 40S ribosomal protein S25
+Macromolecule #12: 40S ribosomal protein S24
+Macromolecule #13: RNA-binding protein PNO1
+Macromolecule #14: 40S ribosomal protein S23
+Macromolecule #15: Bystin
+Macromolecule #16: 40S ribosomal protein S15a
+Macromolecule #17: Pre-rRNA-processing protein TSR1 homolog
+Macromolecule #18: UNKNOWN
+Macromolecule #19: 40S ribosomal protein S19
+Macromolecule #20: 40S ribosomal protein S18
+Macromolecule #21: 40S ribosomal protein S16
+Macromolecule #22: 40S ribosomal protein S15
+Macromolecule #23: 40S ribosomal protein S14
+Macromolecule #24: 40S ribosomal protein S13
+Macromolecule #25: 40S ribosomal protein S11
+Macromolecule #26: 40S ribosomal protein S9
+Macromolecule #27: 40S ribosomal protein S8
+Macromolecule #28: RRP12
+Macromolecule #29: Multifunctional methyltransferase subunit TRM112-like protein
+Macromolecule #30: Probable 18S rRNA (guanine-N(7))-methyltransferase
+Macromolecule #31: UNKNOWN HELIX
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.6 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: FEI FALCON II (4k x 4k) / Average electron dose: 2.5 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |