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Yorodumi- EMDB-4349: Cryo-EM structure of a late human pre-40S ribosomal subunit - State A -
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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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Keywords | 40S / pre-40S / ribosome biogenesis / RIBOSOME | |||||||||||||||
| Function / homology | Function and homology informationtRNA (m2G10) methyltransferase complex / tRNA methyltransferase activator activity / regulation of protein localization to nucleolus / rRNA (guanine-N7)-methylation / rRNA (guanine) methyltransferase activity / methyltransferase complex / tRNA methyltransferase complex / tRNA wobble uridine modification / RNA methylation / RNA N6-methyladenosine methyltransferase complex ...tRNA (m2G10) methyltransferase complex / tRNA methyltransferase activator activity / regulation of protein localization to nucleolus / rRNA (guanine-N7)-methylation / rRNA (guanine) methyltransferase activity / methyltransferase complex / tRNA methyltransferase complex / tRNA wobble uridine modification / RNA methylation / RNA N6-methyladenosine methyltransferase complex / tRNA modification in the nucleus and cytosol / Methylation / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / protein methyltransferase activity / tRNA methylation / positive regulation of rRNA processing / rRNA methylation / positive regulation of respiratory burst involved in inflammatory response / nucleolus organization / negative regulation of RNA splicing / preribosome, small subunit precursor / snoRNA binding / erythrocyte homeostasis / rRNA modification in the nucleus and cytosol / cytoplasmic side of rough endoplasmic reticulum membrane / Formation of the ternary complex, and subsequently, the 43S complex / histone methyltransferase complex / Ribosomal scanning and start codon recognition / Translation initiation complex formation / fibroblast growth factor binding / Protein hydroxylation / TOR signaling / mTORC1-mediated signalling / monocyte chemotaxis / PELO:HBS1L and ABCE1 dissociate a ribosome on a non-stop mRNA / SARS-CoV-1 modulates host translation machinery / Peptide chain elongation / Selenocysteine synthesis / Formation of a pool of free 40S subunits / negative regulation of respiratory burst involved in inflammatory response / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / Eukaryotic Translation Termination / SRP-dependent cotranslational protein targeting to membrane / Response of EIF2AK4 (GCN2) to amino acid deficiency / Viral mRNA Translation / ubiquitin ligase inhibitor activity / 90S preribosome / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / positive regulation of signal transduction by p53 class mediator / GTP hydrolysis and joining of the 60S ribosomal subunit / L13a-mediated translational silencing of Ceruloplasmin expression / regulation of translational fidelity / Major pathway of rRNA processing in the nucleolus and cytosol / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / maturation of LSU-rRNA / negative regulation of ubiquitin-dependent protein catabolic process / positive regulation of cell cycle / Nuclear events stimulated by ALK signaling in cancer / ribosomal small subunit export from nucleus / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / rough endoplasmic reticulum / methyltransferase activity / MDM2/MDM4 family protein binding / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / translation initiation factor binding / Transferases; Transferring one-carbon groups; Methyltransferases / transcription initiation-coupled chromatin remodeling / Resolution of Sister Chromatid Cohesion / stress granule assembly / ZNF598 and the Ribosome-associated Quality Trigger (RQT) complex dissociate a ribosome stalled on a no-go mRNA / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / erythrocyte differentiation / maturation of SSU-rRNA / mRNA 3'-UTR binding / positive regulation of translation / small-subunit processome / translational initiation / RHO GTPases Activate Formins / response to virus / osteoblast differentiation / maintenance of translational fidelity / modification-dependent protein catabolic process / ribosome biogenesis / apical part of cell / Regulation of expression of SLITs and ROBOs / cytoplasmic ribonucleoprotein granule / mRNA 5'-UTR binding / protein tag activity / innate immune response in mucosa / rRNA processing / cytosolic ribosome / Separation of Sister Chromatids / glucose homeostasis / killing of cells of another organism / ribosomal small subunit assembly / ribosomal small subunit biogenesis / antimicrobial humoral immune response mediated by antimicrobial peptide / cell body / small ribosomal subunit Similarity search - Function | |||||||||||||||
| Biological species | Homo sapiens (human) | |||||||||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 4.5 Å | |||||||||||||||
Authors | Ameismeier M / Cheng J | |||||||||||||||
| Funding support | Germany, 4 items
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Citation | Journal: Nature / Year: 2018Title: 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. | |||||||||||||||
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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_4349.map.gz | 15.9 MB | EMDB map data format | |
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| Header (meta data) | emd-4349-v30.xml emd-4349.xml | 45 KB 45 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_4349_fsc.xml | 12.9 KB | Display | FSC data file |
| Images | emd_4349.png | 144.7 KB | ||
| Filedesc metadata | emd-4349.cif.gz | 10.3 KB | ||
| Archive directory | https://data.pdbj.org/pub/emdb/structures/EMD-4349 ftp://data.pdbj.org/pub/emdb/structures/EMD-4349 | 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 | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_4349.map.gz / Format: CCP4 / Size: 178 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: 1.084 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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Processing | 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: 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
Germany, 4 items
Citation
UCSF Chimera



































Z (Sec.)
Y (Row.)
X (Col.)





















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