+
Open data
-
Basic information
Entry | Database: EMDB / ID: EMD-4215 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Title | Yeast 80S ribosome with an uncleaved 20S rRNA | |||||||||
![]() | ||||||||||
![]() |
| |||||||||
Biological species | ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.1 Å | |||||||||
![]() | Scaiola A / Pena C / Weisser M / Boehringer D / Leibundgut M / Klingauf-Nerurkar P / Gerhardy S / Panse VG / Ban N | |||||||||
![]() | ![]() Title: Structure of a eukaryotic cytoplasmic pre-40S ribosomal subunit. Authors: Alain Scaiola / Cohue Peña / Melanie Weisser / Daniel Böhringer / Marc Leibundgut / Purnima Klingauf-Nerurkar / Stefan Gerhardy / Vikram Govind Panse / Nenad Ban / ![]() Abstract: Final maturation of eukaryotic ribosomes occurs in the cytoplasm and requires the sequential removal of associated assembly factors and processing of the immature 20S pre-RNA Using cryo-electron ...Final maturation of eukaryotic ribosomes occurs in the cytoplasm and requires the sequential removal of associated assembly factors and processing of the immature 20S pre-RNA Using cryo-electron microscopy (cryo-EM), we have determined the structure of a yeast cytoplasmic pre-40S particle in complex with Enp1, Ltv1, Rio2, Tsr1, and Pno1 assembly factors poised to initiate final maturation. The structure reveals that the pre-rRNA adopts a highly distorted conformation of its 3' major and 3' minor domains stabilized by the binding of the assembly factors. This observation is consistent with a mechanism that involves concerted release of the assembly factors orchestrated by the folding of the rRNA in the head of the pre-40S subunit during the final stages of maturation. Our results provide a structural framework for the coordination of the final maturation events that drive a pre-40S particle toward the mature form capable of engaging in translation. | |||||||||
History |
|
-
Structure visualization
Movie |
![]() |
---|---|
Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
-
Downloads & links
-EMDB archive
Map data | ![]() | 18.2 MB | ![]() | |
---|---|---|---|---|
Header (meta data) | ![]() ![]() | 12.3 KB 12.3 KB | Display Display | ![]() |
Images | ![]() | 86 KB | ||
Others | ![]() ![]() | 98.1 MB 98.1 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 390 KB | Display | ![]() |
---|---|---|---|---|
Full document | ![]() | 389.1 KB | Display | |
Data in XML | ![]() | 12.6 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
-
Links
EMDB pages | ![]() ![]() |
---|---|
Related items in Molecule of the Month |
-
Map
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Voxel size | X=Y=Z: 1.39 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
|
-Supplemental data
-Half map: #1
File | emd_4215_half_map_1.map | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Projections & Slices |
| ||||||||||||
Density Histograms |
-Half map: #2
File | emd_4215_half_map_2.map | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Projections & Slices |
| ||||||||||||
Density Histograms |
-
Sample components
-Entire : Cytoplasmic yeast 80S ribosome with a uncleaved 20S rRNA
Entire | Name: Cytoplasmic yeast 80S ribosome with a uncleaved 20S rRNA |
---|---|
Components |
|
-Supramolecule #1: Cytoplasmic yeast 80S ribosome with a uncleaved 20S rRNA
Supramolecule | Name: Cytoplasmic yeast 80S ribosome with a uncleaved 20S rRNA type: complex / ID: 1 / Parent: 0 |
---|---|
Source (natural) | Organism: ![]() ![]() |
-Experimental details
-Structure determination
Method | cryo EM |
---|---|
![]() | single particle reconstruction |
Aggregation state | particle |
-
Sample preparation
Buffer | pH: 7.4 |
---|---|
Vitrification | Cryogen name: ETHANE-PROPANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV |
-
Electron microscopy
Microscope | FEI TITAN KRIOS |
---|---|
Image recording | Film or detector model: FEI FALCON III (4k x 4k) / Detector mode: INTEGRATING / Average electron dose: 40.0 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 |
-
Image processing
Final reconstruction | Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 2) / Number images used: 145081 |
---|---|
Initial angle assignment | Type: OTHER |
Final angle assignment | Type: OTHER |