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- EMDB-32799: Cryo-EM structure of a human pre-40S ribosomal subunit - State UTP14 -
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Open data
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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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![]() | ribosome biogenesis / 40S ribosome / RIBOSOME | |||||||||
Function / homology | ![]() 18S rRNA (adenine1779-N6/adenine1780-N6)-dimethyltransferase / 18S rRNA (adenine(1779)-N(6)/adenine(1780)-N(6))-dimethyltransferase activity / peptidyl-glutamine methylation / tRNA (m2G10) methyltransferase complex / rRNA (guanine-N7)-methylation / tRNA methyltransferase activator activity / rRNA (guanine) methyltransferase activity / rRNA (adenine-N6,N6-)-dimethyltransferase activity / tRNA modification in the nucleus and cytosol / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) ...18S rRNA (adenine1779-N6/adenine1780-N6)-dimethyltransferase / 18S rRNA (adenine(1779)-N(6)/adenine(1780)-N(6))-dimethyltransferase activity / peptidyl-glutamine methylation / tRNA (m2G10) methyltransferase complex / rRNA (guanine-N7)-methylation / tRNA methyltransferase activator activity / rRNA (guanine) methyltransferase activity / rRNA (adenine-N6,N6-)-dimethyltransferase activity / tRNA modification in the nucleus and cytosol / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / Methylation / protein methyltransferase activity / tRNA methylation / positive regulation of rRNA processing / translation at postsynapse / rRNA methylation / negative regulation of RNA splicing / mammalian oogenesis stage / activation-induced cell death of T cells / neural crest cell differentiation / U3 snoRNA binding / translation at presynapse / Formation of the ternary complex, and subsequently, the 43S complex / erythrocyte homeostasis / rRNA modification in the nucleus and cytosol / preribosome, small subunit precursor / negative regulation of ubiquitin protein ligase activity / Ribosomal scanning and start codon recognition / Translation initiation complex formation / Protein hydroxylation / TOR signaling / SARS-CoV-1 modulates host translation machinery / mTORC1-mediated signalling / T cell proliferation involved in immune response / Peptide chain elongation / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / Selenocysteine synthesis / Formation of a pool of free 40S subunits / ubiquitin ligase inhibitor activity / Eukaryotic Translation Termination / Response of EIF2AK4 (GCN2) to amino acid deficiency / SRP-dependent cotranslational protein targeting to membrane / negative regulation of ubiquitin-dependent protein catabolic process / Viral mRNA Translation / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / 90S preribosome / GTP hydrolysis and joining of the 60S ribosomal subunit / L13a-mediated translational silencing of Ceruloplasmin expression / erythrocyte development / 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 / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / positive regulation of cell cycle / translation initiation factor binding / gastrulation / cytosolic ribosome / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / stress granule assembly / Resolution of Sister Chromatid Cohesion / transcription initiation-coupled chromatin remodeling / innate immune response in mucosa / erythrocyte differentiation / Transferases; Transferring one-carbon groups; Methyltransferases / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / positive regulation of translation / mRNA 3'-UTR binding / methyltransferase activity / maturation of SSU-rRNA / neural tube closure / translational initiation / small-subunit processome / placenta development / RHO GTPases Activate Formins / maintenance of translational fidelity / response to virus / modification-dependent protein catabolic process / mRNA 5'-UTR binding / G1/S transition of mitotic cell cycle / Regulation of expression of SLITs and ROBOs / cytoplasmic ribonucleoprotein granule / protein tag activity / antimicrobial humoral immune response mediated by antimicrobial peptide / rRNA processing / Separation of Sister Chromatids / antibacterial humoral response / glucose homeostasis / presynapse / chromatin organization / T cell differentiation in thymus / cell body / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / cytosolic small ribosomal subunit / small ribosomal subunit rRNA binding Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.2 Å | |||||||||
![]() | Cheng J / Lau B / Thoms M / Ameismeier M / Berninghausen O / Hurt E / Beckmann R | |||||||||
Funding support | 1 items
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![]() | ![]() Title: 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. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 105.6 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 35.4 KB 35.4 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 12.8 KB | Display | ![]() |
Images | ![]() | 131.2 KB | ||
Filedesc metadata | ![]() | 10.7 KB | ||
Archive directory | ![]() ![]() | 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 ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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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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![]() | 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: ![]() |
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 |