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Yorodumi- EMDB-32806: Cryo-EM structure of a human pre-40S ribosomal subunit - State RR... -
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Basic information
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| Title | Cryo-EM structure of a human pre-40S ribosomal subunit - State RRP12-B2 | |||||||||
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Keywords | ribosome biogenesis / 40S ribosome / RIBOSOME | |||||||||
| Function / homology | Function and homology informationregulation of protein localization to nucleolus / trophectodermal cell differentiation / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / positive regulation of respiratory burst involved in inflammatory response / positive regulation of ubiquitin-protein transferase activity / nucleolus organization / negative regulation of RNA splicing / U3 snoRNA binding / neural crest cell differentiation / snoRNA binding ...regulation of protein localization to nucleolus / trophectodermal cell differentiation / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / positive regulation of respiratory burst involved in inflammatory response / positive regulation of ubiquitin-protein transferase activity / nucleolus organization / negative regulation of RNA splicing / U3 snoRNA binding / neural crest cell differentiation / snoRNA binding / preribosome, small subunit precursor / rRNA modification in the nucleus and cytosol / negative regulation of bicellular tight junction assembly / erythrocyte homeostasis / cytoplasmic side of rough endoplasmic reticulum membrane / Formation of the ternary complex, and subsequently, the 43S complex / laminin receptor activity / Ribosomal scanning and start codon recognition / Translation initiation complex formation / fibroblast growth factor binding / Protein hydroxylation / monocyte chemotaxis / TOR signaling / mTORC1-mediated signalling / SARS-CoV-1 modulates host translation machinery / cellular response to ethanol / Peptide chain elongation / Selenocysteine synthesis / Formation of a pool of free 40S subunits / Eukaryotic Translation Termination / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / SRP-dependent cotranslational protein targeting to membrane / Response of EIF2AK4 (GCN2) to amino acid deficiency / negative regulation of respiratory burst involved in inflammatory response / ubiquitin ligase inhibitor activity / Viral mRNA Translation / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / negative regulation of ubiquitin-dependent protein catabolic process / 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 / 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) / Protein methylation / 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) / Nuclear events stimulated by ALK signaling in cancer / rough endoplasmic reticulum / positive regulation of cell cycle / RNA endonuclease activity / laminin binding / ribosomal small subunit export from nucleus / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / visual perception / translation initiation factor binding / Maturation of protein E / Maturation of protein E / MDM2/MDM4 family protein binding / ER Quality Control Compartment (ERQC) / Myoclonic epilepsy of Lafora / Mitotic Prometaphase / FLT3 signaling by CBL mutants / liver regeneration / IRAK2 mediated activation of TAK1 complex / Alpha-protein kinase 1 signaling pathway / EML4 and NUDC in mitotic spindle formation / Glycogen synthesis / IRAK1 recruits IKK complex / IRAK1 recruits IKK complex upon TLR7/8 or 9 stimulation / Prevention of phagosomal-lysosomal fusion / Endosomal Sorting Complex Required For Transport (ESCRT) / Membrane binding and targetting of GAG proteins / Negative regulation of FLT3 / Regulation of TBK1, IKKε (IKBKE)-mediated activation of IRF3, IRF7 / PTK6 Regulates RTKs and Their Effectors AKT1 and DOK1 / Regulation of TBK1, IKKε-mediated activation of IRF3, IRF7 upon TLR3 ligation / IRAK2 mediated activation of TAK1 complex upon TLR7/8 or 9 stimulation / Constitutive Signaling by NOTCH1 HD Domain Mutants / NOTCH2 Activation and Transmission of Signal to the Nucleus / TICAM1,TRAF6-dependent induction of TAK1 complex / TICAM1-dependent activation of IRF3/IRF7 / APC/C:Cdc20 mediated degradation of Cyclin B / Downregulation of ERBB4 signaling / antiviral innate immune response / APC-Cdc20 mediated degradation of Nek2A / Regulation of FZD by ubiquitination / cytosolic ribosome / p75NTR recruits signalling complexes / stem cell proliferation / InlA-mediated entry of Listeria monocytogenes into host cells / TRAF6 mediated IRF7 activation in TLR7/8 or 9 signaling / NF-kB is activated and signals survival / TRAF6-mediated induction of TAK1 complex within TLR4 complex / Regulation of pyruvate metabolism / Pexophagy / Downregulation of ERBB2:ERBB3 signaling / Resolution of Sister Chromatid Cohesion / stress granule assembly / Regulation of innate immune responses to cytosolic DNA Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.0 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_32806.map.gz | 96.2 MB | EMDB map data format | |
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| Header (meta data) | emd-32806-v30.xml emd-32806.xml | 50.4 KB 50.4 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_32806_fsc.xml | 12.7 KB | Display | FSC data file |
| Images | emd_32806.png | 157.9 KB | ||
| Filedesc metadata | emd-32806.cif.gz | 12.3 KB | ||
| Others | emd_32806_additional_1.map.gz emd_32806_additional_2.map.gz | 162.1 MB 162.7 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-32806 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-32806 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 7wtzMC ![]() 7wtnC ![]() 7wtoC ![]() 7wtpC ![]() 7wtqC ![]() 7wtrC ![]() 7wtsC ![]() 7wttC ![]() 7wtuC ![]() 7wtvC ![]() 7wtwC ![]() 7wtxC ![]() 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_32806.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
-Additional map: #1
| File | emd_32806_additional_1.map | ||||||||||||
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-Additional map: #2
| File | emd_32806_additional_2.map | ||||||||||||
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| Density Histograms |
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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 S5
+Macromolecule #3: 40S ribosomal protein S12
+Macromolecule #4: 40S ribosomal protein S15
+Macromolecule #5: 40S ribosomal protein S16
+Macromolecule #6: 40S ribosomal protein S17
+Macromolecule #7: 40S ribosomal protein S18
+Macromolecule #8: 40S ribosomal protein S19
+Macromolecule #9: 40S ribosomal protein S25
+Macromolecule #10: 40S ribosomal protein S28
+Macromolecule #11: Ubiquitin-40S ribosomal protein S27a
+Macromolecule #12: 40S ribosomal protein SA
+Macromolecule #13: 40S ribosomal protein S3a
+Macromolecule #14: 40S ribosomal protein S2
+Macromolecule #15: 40S ribosomal protein S4, X isoform
+Macromolecule #16: 40S ribosomal protein S6
+Macromolecule #17: 40S ribosomal protein S7
+Macromolecule #18: 40S ribosomal protein S8
+Macromolecule #19: 40S ribosomal protein S9
+Macromolecule #20: 40S ribosomal protein S11
+Macromolecule #21: 40S ribosomal protein S13
+Macromolecule #22: 40S ribosomal protein S14
+Macromolecule #23: 40S ribosomal protein S21
+Macromolecule #24: 40S ribosomal protein S15a
+Macromolecule #25: 40S ribosomal protein S23
+Macromolecule #26: 40S ribosomal protein S24
+Macromolecule #27: 40S ribosomal protein S27
+Macromolecule #28: 40S ribosomal protein S30
+Macromolecule #29: RNA-binding protein PNO1
+Macromolecule #30: RNA-binding protein NOB1
+Macromolecule #31: Pre-rRNA-processing protein TSR1 homolog
+Macromolecule #32: Bystin
+Macromolecule #33: Protein LTV1 homolog
+Macromolecule #34: RRP12-like protein
+Macromolecule #35: ZINC ION
-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

