[English] 日本語

- EMDB-4348: Cryo-EM structure of a late human pre-40S ribosomal subunit - State B -
+
Open data
-
Basic information
Entry | Database: EMDB / ID: EMD-4348 | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Title | Cryo-EM structure of a late human pre-40S ribosomal subunit - State B | |||||||||||||||
![]() | ||||||||||||||||
![]() |
| |||||||||||||||
![]() | 40S / pre-40S / ribosome biogenesis / RIBOSOME | |||||||||||||||
Function / homology | ![]() regulation of protein localization to nucleolus / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / trophectodermal cell differentiation / positive regulation of respiratory burst involved in inflammatory response / nucleolus organization / negative regulation of RNA splicing / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / neural crest cell differentiation / positive regulation of ubiquitin-protein transferase activity / U3 snoRNA binding ...regulation of protein localization to nucleolus / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / trophectodermal cell differentiation / positive regulation of respiratory burst involved in inflammatory response / nucleolus organization / negative regulation of RNA splicing / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / neural crest cell differentiation / positive regulation of ubiquitin-protein transferase activity / U3 snoRNA binding / negative regulation of bicellular tight junction assembly / rRNA modification in the nucleus and cytosol / Formation of the ternary complex, and subsequently, the 43S complex / erythrocyte homeostasis / cytoplasmic side of rough endoplasmic reticulum membrane / snoRNA binding / laminin receptor activity / preribosome, small subunit precursor / negative regulation of ubiquitin protein ligase activity / Ribosomal scanning and start codon recognition / Translation initiation complex formation / fibroblast growth factor binding / monocyte chemotaxis / Protein hydroxylation / TOR signaling / SARS-CoV-1 modulates host translation machinery / mTORC1-mediated signalling / cellular response to ethanol / Peptide chain elongation / Selenocysteine synthesis / Formation of a pool of free 40S subunits / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / Eukaryotic Translation Termination / ubiquitin ligase inhibitor activity / Response of EIF2AK4 (GCN2) to amino acid deficiency / negative regulation of ubiquitin-dependent protein catabolic process / positive regulation of signal transduction by p53 class mediator / SRP-dependent cotranslational protein targeting to membrane / Viral mRNA Translation / negative regulation of respiratory burst involved in inflammatory response / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / 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 / 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) / Protein methylation / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / Nuclear events stimulated by ALK signaling in cancer / ribosomal small subunit export from nucleus / rough endoplasmic reticulum / laminin binding / translation regulator activity / positive regulation of cell cycle / translation initiation factor binding / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / MDM2/MDM4 family protein binding / visual perception / antiviral innate immune response / Mitotic Prometaphase / cytosolic ribosome / EML4 and NUDC in mitotic spindle formation / RNA endonuclease activity / stress granule assembly / Resolution of Sister Chromatid Cohesion / cellular response to leukemia inhibitory factor / positive regulation of translation / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / innate immune response in mucosa / erythrocyte differentiation / stem cell proliferation / mRNA 3'-UTR binding / maturation of SSU-rRNA / liver regeneration / neural tube closure / translational initiation / small-subunit processome / modification-dependent protein catabolic process / RHO GTPases Activate Formins / protein tag activity / Regulation of expression of SLITs and ROBOs / response to insulin / maintenance of translational fidelity / GABA-ergic synapse / mRNA 5'-UTR binding / response to virus / RMTs methylate histone arginines / cytoplasmic ribonucleoprotein granule / Separation of Sister Chromatids / osteoblast differentiation / rRNA processing / antimicrobial humoral immune response mediated by antimicrobial peptide / antibacterial humoral response / apical part of cell / glucose homeostasis / ribosome biogenesis / presynapse / chromosome / ribosome binding / virus receptor activity Similarity search - Function | |||||||||||||||
Biological species | ![]() | |||||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 4.0 Å | |||||||||||||||
![]() | Ameismeier M / Cheng J | |||||||||||||||
Funding support | ![]()
| |||||||||||||||
![]() | ![]() 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 |
|
-
Structure visualization
Movie |
![]() |
---|---|
Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
-
Downloads & links
-EMDB archive
Map data | ![]() | 17.4 MB | ![]() | |
---|---|---|---|---|
Header (meta data) | ![]() ![]() | 47.8 KB 47.8 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 12.9 KB | Display | ![]() |
Images | ![]() | 159.9 KB | ||
Filedesc metadata | ![]() | 11 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 257.2 KB | Display | ![]() |
---|---|---|---|---|
Full document | ![]() | 256.3 KB | Display | |
Data in XML | ![]() | 13.2 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6g4sMC ![]() 4337C ![]() 4349C ![]() 4350C ![]() 4351C ![]() 4352C ![]() 4353C ![]() 6g18C ![]() 6g4wC ![]() 6g51C ![]() 6g53C ![]() 6g5hC ![]() 6g5iC M: atomic model generated by this map C: citing same article ( |
---|---|
Similar structure data |
-
Links
EMDB pages | ![]() ![]() |
---|---|
Related items in Molecule of the Month |
-
Map
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.084 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
|
-Supplemental data
-
Sample components
+Entire : Cryo-EM structure of a late human pre-40S ribosomal subunit - State B
+Supramolecule #1: Cryo-EM structure of a late human pre-40S ribosomal subunit - State B
+Macromolecule #1: pre-18S ribosomal RNA
+Macromolecule #2: 40S ribosomal protein S17
+Macromolecule #3: 40S ribosomal protein SA
+Macromolecule #4: 40S ribosomal protein S27
+Macromolecule #5: 40S ribosomal protein S3a
+Macromolecule #6: 40S ribosomal protein S2
+Macromolecule #7: 40S ribosomal protein S28
+Macromolecule #8: 40S ribosomal protein S4, X isoform
+Macromolecule #9: 40S ribosomal protein S30
+Macromolecule #10: 40S ribosomal protein S5
+Macromolecule #11: 40S ribosomal protein S7
+Macromolecule #12: 40S ribosomal protein S6
+Macromolecule #13: 40S ribosomal protein S25
+Macromolecule #14: 40S ribosomal protein S24
+Macromolecule #15: RNA-binding protein NOB1
+Macromolecule #16: RNA-binding protein PNO1
+Macromolecule #17: 40S ribosomal protein S23
+Macromolecule #18: Bystin
+Macromolecule #19: 40S ribosomal protein S15a
+Macromolecule #20: 40S ribosomal protein S21
+Macromolecule #21: Pre-rRNA-processing protein TSR1 homolog
+Macromolecule #22: Protein LTV1 homolog
+Macromolecule #23: 40S ribosomal protein S19
+Macromolecule #24: 40S ribosomal protein S18
+Macromolecule #25: 40S ribosomal protein S16
+Macromolecule #26: 40S ribosomal protein S15
+Macromolecule #27: 40S ribosomal protein S14
+Macromolecule #28: 40S ribosomal protein S13
+Macromolecule #29: 40S ribosomal protein S11
+Macromolecule #30: 40S ribosomal protein S9
+Macromolecule #31: 40S ribosomal protein S8
+Macromolecule #32: RRP12
+Macromolecule #33: Unknown
-Experimental details
-Structure determination
Method | cryo EM |
---|---|
![]() | single particle reconstruction |
Aggregation state | particle |
-
Sample preparation
Buffer | pH: 7.6 |
---|---|
Vitrification | Cryogen name: ETHANE |
-
Electron microscopy
Microscope | FEI TITAN KRIOS |
---|---|
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 |