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Yorodumi- EMDB-32799: Cryo-EM structure of a human pre-40S ribosomal subunit - State UTP14 -
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Basic information
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| Title | Cryo-EM structure of a human pre-40S ribosomal subunit - State UTP14 | |||||||||
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Keywords | ribosome biogenesis / 40S ribosome / RIBOSOME | |||||||||
| Function / homology | Function and homology informationpeptidyl-glutamine methylation / tRNA (m2G10) methyltransferase complex / 18S rRNA (adenine1779-N6/adenine1780-N6)-dimethyltransferase / rRNA (guanine-N7)-methylation / 18S rRNA (adenine(1779)-N(6)/adenine(1780)-N(6))-dimethyltransferase activity / tRNA methyltransferase activator activity / rRNA (guanine) methyltransferase activity / rRNA (adenine-N6,N6-)-dimethyltransferase activity / tRNA modification in the nucleus and cytosol / Methylation ...peptidyl-glutamine methylation / tRNA (m2G10) methyltransferase complex / 18S rRNA (adenine1779-N6/adenine1780-N6)-dimethyltransferase / rRNA (guanine-N7)-methylation / 18S rRNA (adenine(1779)-N(6)/adenine(1780)-N(6))-dimethyltransferase activity / tRNA methyltransferase activator activity / rRNA (guanine) methyltransferase activity / rRNA (adenine-N6,N6-)-dimethyltransferase activity / 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 / negative regulation of RNA splicing / rRNA methylation / neural crest cell differentiation / negative regulation of bicellular tight junction assembly / rRNA modification in the nucleus and cytosol / U3 snoRNA binding / erythrocyte homeostasis / Formation of the ternary complex, and subsequently, the 43S complex / negative regulation of ubiquitin protein ligase activity / preribosome, small subunit precursor / Ribosomal scanning and start codon recognition / Translation initiation complex formation / TOR signaling / Protein hydroxylation / SARS-CoV-1 modulates host translation machinery / 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 / Eukaryotic Translation Termination / ubiquitin ligase inhibitor activity / SRP-dependent cotranslational protein targeting to membrane / Response of EIF2AK4 (GCN2) to amino acid deficiency / negative regulation of ubiquitin-dependent protein catabolic process / Viral mRNA Translation / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / GTP hydrolysis and joining of the 60S ribosomal subunit / 90S preribosome / L13a-mediated translational silencing of Ceruloplasmin expression / 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 / Nuclear events stimulated by ALK signaling in cancer / rough endoplasmic reticulum / translation regulator activity / positive regulation of cell cycle / translation initiation factor binding / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / cytosolic ribosome / stress granule assembly / transcription initiation-coupled chromatin remodeling / Resolution of Sister Chromatid Cohesion / Transferases; Transferring one-carbon groups; Methyltransferases / positive regulation of translation / mRNA 3'-UTR binding / erythrocyte differentiation / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / innate immune response in mucosa / methyltransferase activity / neural tube closure / maturation of SSU-rRNA / small-subunit processome / translational initiation / RHO GTPases Activate Formins / response to insulin / GABA-ergic synapse / maintenance of translational fidelity / modification-dependent protein catabolic process / mRNA 5'-UTR binding / response to virus / Regulation of expression of SLITs and ROBOs / protein tag activity / cytoplasmic ribonucleoprotein granule / rRNA processing / antimicrobial humoral immune response mediated by antimicrobial peptide / Separation of Sister Chromatids / antibacterial humoral response / glucose homeostasis / presynapse / cell body / chromatin organization / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / nuclear membrane / SARS-CoV-2 modulates host translation machinery / cytoplasmic translation / cell differentiation / defense response to Gram-positive bacterium / postsynaptic density Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.2 Å | |||||||||
Authors | Cheng J / Lau B / Thoms M / Ameismeier M / Berninghausen O / Hurt E / Beckmann R | |||||||||
| Funding support | 1 items
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Citation | Journal: Nucleic Acids Res / Year: 2022Title: The nucleoplasmic phase of pre-40S formation prior to nuclear export. Authors: Jingdong Cheng / Benjamin Lau / Matthias Thoms / Michael Ameismeier / Otto Berninghausen / Ed Hurt / Roland Beckmann / ![]() Abstract: Biogenesis of the small ribosomal subunit in eukaryotes starts in the nucleolus with the formation of a 90S precursor and ends in the cytoplasm. Here, we elucidate the enigmatic structural ...Biogenesis of the small ribosomal subunit in eukaryotes starts in the nucleolus with the formation of a 90S precursor and ends in the cytoplasm. Here, we elucidate the enigmatic structural transitions of assembly intermediates from human and yeast cells during the nucleoplasmic maturation phase. After dissociation of all 90S factors, the 40S body adopts a close-to-mature conformation, whereas the 3' major domain, later forming the 40S head, remains entirely immature. A first coordination is facilitated by the assembly factors TSR1 and BUD23-TRMT112, followed by re-positioning of RRP12 that is already recruited early to the 90S for further head rearrangements. Eventually, the uS2 cluster, CK1 (Hrr25 in yeast) and the export factor SLX9 associate with the pre-40S to provide export competence. These exemplary findings reveal the evolutionary conserved mechanism of how yeast and humans assemble the 40S ribosomal subunit, but reveal also a few minor differences. | |||||||||
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_32799.map.gz | 105.6 MB | EMDB map data format | |
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| Header (meta data) | emd-32799-v30.xml emd-32799.xml | 35.4 KB 35.4 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_32799_fsc.xml | 12.8 KB | Display | FSC data file |
| Images | emd_32799.png | 131.2 KB | ||
| Filedesc metadata | emd-32799.cif.gz | 10.7 KB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-32799 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-32799 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 7wtsMC ![]() 7wtnC ![]() 7wtoC ![]() 7wtpC ![]() 7wtqC ![]() 7wtrC ![]() 7wttC ![]() 7wtuC ![]() 7wtvC ![]() 7wtwC ![]() 7wtxC ![]() 7wtzC ![]() 7wu0C M: atomic model generated by this map C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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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_32799.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: 1.059 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
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Sample components
+Entire : Yeast pre-40S ribosomal subunit
+Supramolecule #1: Yeast pre-40S ribosomal subunit
+Macromolecule #1: 18S rRNA
+Macromolecule #2: 40S ribosomal protein S27
+Macromolecule #3: 40S ribosomal protein S3a
+Macromolecule #4: 40S ribosomal protein S4, X isoform
+Macromolecule #5: 40S ribosomal protein S30
+Macromolecule #6: 40S ribosomal protein S7
+Macromolecule #7: 40S ribosomal protein S6
+Macromolecule #8: 40S ribosomal protein S24
+Macromolecule #9: RNA-binding protein PNO1
+Macromolecule #10: 40S ribosomal protein S23
+Macromolecule #11: 40S ribosomal protein S15a
+Macromolecule #12: Pre-rRNA-processing protein TSR1 homolog
+Macromolecule #13: 40S ribosomal protein S14
+Macromolecule #14: 40S ribosomal protein S13
+Macromolecule #15: 40S ribosomal protein S11
+Macromolecule #16: 40S ribosomal protein S9
+Macromolecule #17: 40S ribosomal protein S8
+Macromolecule #18: Multifunctional methyltransferase subunit TRM112-like protein
+Macromolecule #19: Probable 18S rRNA (guanine-N(7))-methyltransferase
+Macromolecule #20: RRP12-like protein
+Macromolecule #21: Ribosome biogenesis protein SLX9 homolog
+Macromolecule #22: U3 small nucleolar RNA-associated protein 14 homolog A
+Macromolecule #23: Probable dimethyladenosine transferase
-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: 7.4 |
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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: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Average electron dose: 44.0 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 0.8 µm |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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About Yorodumi



Keywords
Homo sapiens (human)
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Processing
FIELD EMISSION GUN

