[English] 日本語

- EMDB-21420: 70S ribosome bound to HIV frameshifting stem-loop (FSS) and P/E t... -
+
Open data
-
Basic information
Entry | Database: EMDB / ID: EMD-21420 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Title | 70S ribosome bound to HIV frameshifting stem-loop (FSS) and P/E tRNA (rotated conformation) | |||||||||
![]() | ||||||||||
![]() |
| |||||||||
![]() | HIV FSS / frameshifting / RIBOSOME | |||||||||
Function / homology | ![]() transcription antitermination factor activity, RNA binding / misfolded RNA binding / Group I intron splicing / RNA folding / transcriptional attenuation / positive regulation of ribosome biogenesis / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / negative regulation of cytoplasmic translation / four-way junction DNA binding ...transcription antitermination factor activity, RNA binding / misfolded RNA binding / Group I intron splicing / RNA folding / transcriptional attenuation / positive regulation of ribosome biogenesis / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / negative regulation of cytoplasmic translation / four-way junction DNA binding / DnaA-L2 complex / translation repressor activity / negative regulation of translational initiation / regulation of mRNA stability / negative regulation of DNA-templated DNA replication initiation / mRNA regulatory element binding translation repressor activity / assembly of large subunit precursor of preribosome / positive regulation of RNA splicing / ribosome assembly / transcription elongation factor complex / cytosolic ribosome assembly / regulation of DNA-templated transcription elongation / DNA endonuclease activity / transcription antitermination / regulation of cell growth / DNA-templated transcription termination / maintenance of translational fidelity / response to radiation / mRNA 5'-UTR binding / regulation of translation / ribosome biogenesis / large ribosomal subunit / ribosome binding / transferase activity / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / 5S rRNA binding / ribosomal large subunit assembly / cytosolic small ribosomal subunit / large ribosomal subunit rRNA binding / cytosolic large ribosomal subunit / cytoplasmic translation / tRNA binding / negative regulation of translation / rRNA binding / ribosome / structural constituent of ribosome / translation / response to antibiotic / negative regulation of DNA-templated transcription / mRNA binding / DNA binding / RNA binding / zinc ion binding / membrane / cytosol / cytoplasm Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() ![]() ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.1 Å | |||||||||
![]() | Loerch S / Bao C | |||||||||
Funding support | ![]()
| |||||||||
![]() | ![]() Title: mRNA stem-loops can pause the ribosome by hindering A-site tRNA binding. Authors: Chen Bao / Sarah Loerch / Clarence Ling / Andrei A Korostelev / Nikolaus Grigorieff / Dmitri N Ermolenko / ![]() Abstract: Although the elongating ribosome is an efficient helicase, certain mRNA stem-loop structures are known to impede ribosome movement along mRNA and stimulate programmed ribosome frameshifting via ...Although the elongating ribosome is an efficient helicase, certain mRNA stem-loop structures are known to impede ribosome movement along mRNA and stimulate programmed ribosome frameshifting via mechanisms that are not well understood. Using biochemical and single-molecule Förster resonance energy transfer (smFRET) experiments, we studied how frameshift-inducing stem-loops from mRNA and the transcript of Human Immunodeficiency Virus (HIV) perturb translation elongation. We find that upon encountering the ribosome, the stem-loops strongly inhibit A-site tRNA binding and ribosome intersubunit rotation that accompanies translation elongation. Electron cryo-microscopy (cryo-EM) reveals that the HIV stem-loop docks into the A site of the ribosome. Our results suggest that mRNA stem-loops can transiently escape the ribosome helicase by binding to the A site. Thus, the stem-loops can modulate gene expression by sterically hindering tRNA binding and inhibiting translation elongation. | |||||||||
History |
|
-
Structure visualization
Movie |
![]() |
---|---|
Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
-
Downloads & links
-EMDB archive
Map data | ![]() | 962.4 MB | ![]() | |
---|---|---|---|---|
Header (meta data) | ![]() ![]() | 66.3 KB 66.3 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 23.9 KB | Display | ![]() |
Images | ![]() | 109.2 KB | ||
Filedesc metadata | ![]() | 13.1 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 713.5 KB | Display | ![]() |
---|---|---|---|---|
Full document | ![]() | 713.1 KB | Display | |
Data in XML | ![]() | 19 KB | Display | |
Data in CIF | ![]() | 26.7 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6vwlMC ![]() 6vwmC ![]() 6vwnC 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: 1.01 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
|
-Supplemental data
-
Sample components
+Entire : 70S ribosome bound to HIV frameshifting stem-loop (FSS) and P/E t...
+Supramolecule #1: 70S ribosome bound to HIV frameshifting stem-loop (FSS) and P/E t...
+Macromolecule #1: 50S ribosomal protein L2
+Macromolecule #2: 50S ribosomal protein L3
+Macromolecule #3: 50S ribosomal protein L4
+Macromolecule #4: 50S ribosomal protein L5
+Macromolecule #5: 50S ribosomal protein L6
+Macromolecule #6: 50S ribosomal protein L9
+Macromolecule #7: 50S ribosomal protein L13
+Macromolecule #8: 50S ribosomal protein L14
+Macromolecule #9: 50S ribosomal protein L15
+Macromolecule #10: 50S ribosomal protein L16
+Macromolecule #11: 50S ribosomal protein L17
+Macromolecule #12: 50S ribosomal protein L18
+Macromolecule #13: 50S ribosomal protein L19
+Macromolecule #14: 50S ribosomal protein L20
+Macromolecule #15: 50S ribosomal protein L21
+Macromolecule #16: 50S ribosomal protein L22
+Macromolecule #17: 50S ribosomal protein L23
+Macromolecule #18: 50S ribosomal protein L24
+Macromolecule #19: 50S ribosomal protein L25
+Macromolecule #20: 50S ribosomal protein L27
+Macromolecule #21: 50S ribosomal protein L28
+Macromolecule #22: 50S ribosomal protein L29
+Macromolecule #23: 50S ribosomal protein L30
+Macromolecule #24: 50S ribosomal protein L32
+Macromolecule #25: 50S ribosomal protein L33
+Macromolecule #26: 50S ribosomal protein L34
+Macromolecule #27: 50S ribosomal protein L35
+Macromolecule #30: 50S ribosomal protein L36
+Macromolecule #32: 30S ribosomal protein S2
+Macromolecule #33: 30S ribosomal protein S3
+Macromolecule #34: 30S ribosomal protein S4
+Macromolecule #35: 30S ribosomal protein S5
+Macromolecule #36: 30S ribosomal protein S6
+Macromolecule #37: 30S ribosomal protein S7
+Macromolecule #38: 30S ribosomal protein S8
+Macromolecule #39: 30S ribosomal protein S9
+Macromolecule #40: 30S ribosomal protein S10
+Macromolecule #41: 30S ribosomal protein S11
+Macromolecule #42: 30S ribosomal protein S12
+Macromolecule #43: 30S ribosomal protein S13
+Macromolecule #44: 30S ribosomal protein S14
+Macromolecule #45: 30S ribosomal protein S15
+Macromolecule #46: 30S ribosomal protein S16
+Macromolecule #47: 30S ribosomal protein S17
+Macromolecule #48: 30S ribosomal protein S18
+Macromolecule #49: 30S ribosomal protein S19
+Macromolecule #50: 30S ribosomal protein S20
+Macromolecule #51: 30S ribosomal protein S21
+Macromolecule #28: 5S ribosomal RNA
+Macromolecule #29: tRNAPhe
+Macromolecule #31: 23S ribosomal RNA
+Macromolecule #52: 16S ribosomal RNA
+Macromolecule #53: HIV frameshift stimulating sequence mRNA
+Macromolecule #54: MAGNESIUM ION
-Experimental details
-Structure determination
Method | cryo EM |
---|---|
![]() | single particle reconstruction |
Aggregation state | particle |
-
Sample preparation
Concentration | 0.6 mg/mL |
---|---|
Buffer | pH: 7.5 |
Grid | Material: COPPER / Mesh: 400 |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 90 % / Chamber temperature: 298 K / Instrument: FEI VITROBOT MARK IV |
-
Electron microscopy
Microscope | FEI TITAN KRIOS |
---|---|
Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 75.0 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: 0.5 µm |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |