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Yorodumi- PDB-5mdw: Structure of ArfA(A18T) and RF2 bound to the 70S ribosome (pre-ac... -
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Open data
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Basic information
| Entry | Database: PDB / ID: 5mdw | |||||||||
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| Title | Structure of ArfA(A18T) and RF2 bound to the 70S ribosome (pre-accommodated state) | |||||||||
Components |
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Keywords | RIBOSOME / ArfA RF2 trans-translation / 70S / 50S / 30S / rescue termination / cryo-EM | |||||||||
| Function / homology | Function and homology informationtranslation release factor activity, codon specific / negative regulation of cytoplasmic translational initiation / stringent response / ribosomal large subunit binding / ornithine decarboxylase inhibitor activity / transcription antitermination factor activity, RNA binding / misfolded RNA binding / Group I intron splicing / RNA folding / transcriptional attenuation ...translation release factor activity, codon specific / negative regulation of cytoplasmic translational initiation / stringent response / ribosomal large subunit binding / ornithine decarboxylase inhibitor activity / transcription antitermination factor activity, RNA binding / misfolded RNA binding / Group I intron splicing / RNA folding / transcriptional attenuation / endoribonuclease inhibitor activity / positive regulation of ribosome biogenesis / RNA-binding transcription regulator activity / translational termination / 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 / rescue of stalled ribosome / mRNA regulatory element binding translation repressor activity / assembly of large subunit precursor of preribosome / positive regulation of RNA splicing / cytosolic ribosome assembly / regulation of DNA-templated transcription elongation / response to reactive oxygen species / ribosome assembly / transcription elongation factor complex / DNA endonuclease activity / transcription antitermination / regulation of cell growth / translational initiation / DNA-templated transcription termination / response to radiation / maintenance of translational fidelity / mRNA 5'-UTR binding / ribosome biogenesis / large ribosomal subunit / regulation of translation / ribosome binding / transferase activity / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / 5S rRNA binding / ribosomal large subunit assembly / small ribosomal subunit rRNA binding / large ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / cytosolic large ribosomal subunit / cytoplasmic translation / tRNA binding / negative regulation of translation / rRNA binding / structural constituent of ribosome / ribosome / translation / viral translational frameshifting / response to antibiotic / negative regulation of DNA-templated transcription / mRNA binding / DNA binding / RNA binding / zinc ion binding / membrane / cytoplasm / cytosol Similarity search - Function | |||||||||
| Biological species | ![]() | |||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.06 Å | |||||||||
Authors | James, N.R. / Brown, A. / Gordiyenko, Y. / Ramakrishnan, V. | |||||||||
| Funding support | United Kingdom, 2items
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Citation | Journal: Science / Year: 2016Title: Translational termination without a stop codon. Authors: Nathan R James / Alan Brown / Yuliya Gordiyenko / V Ramakrishnan / ![]() Abstract: Ribosomes stall when they encounter the end of messenger RNA (mRNA) without an in-frame stop codon. In bacteria, these "nonstop" complexes can be rescued by alternative ribosome-rescue factor A (ArfA) ...Ribosomes stall when they encounter the end of messenger RNA (mRNA) without an in-frame stop codon. In bacteria, these "nonstop" complexes can be rescued by alternative ribosome-rescue factor A (ArfA). We used electron cryomicroscopy to determine structures of ArfA bound to the ribosome with 3'-truncated mRNA, at resolutions ranging from 3.0 to 3.4 angstroms. ArfA binds within the ribosomal mRNA channel and substitutes for the absent stop codon in the A site by specifically recruiting release factor 2 (RF2), initially in a compact preaccommodated state. A similar conformation of RF2 may occur on stop codons, suggesting a general mechanism for release-factor-mediated translational termination in which a conformational switch leads to peptide release only when the appropriate signal is present in the A site. | |||||||||
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Structure visualization
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| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 5mdw.cif.gz | 3.7 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb5mdw.ent.gz | Display | PDB format | |
| PDBx/mmJSON format | 5mdw.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 5mdw_validation.pdf.gz | 280.1 KB | Display | wwPDB validaton report |
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| Full document | 5mdw_full_validation.pdf.gz | 302.6 KB | Display | |
| Data in XML | 5mdw_validation.xml.gz | 9.1 KB | Display | |
| Data in CIF | 5mdw_validation.cif.gz | 106.8 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/md/5mdw ftp://data.pdbj.org/pub/pdb/validation_reports/md/5mdw | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 3490MC ![]() 3489C ![]() 3492C ![]() 3493C ![]() 5mdvC ![]() 5mdyC ![]() 5mdzC M: map data used to model this data C: citing same article ( |
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| Similar structure data |
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Links
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Assembly
| Deposited unit | ![]()
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Components
-RNA chain , 5 types, 5 molecules 12345
| #1: RNA chain | Mass: 941832.625 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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| #2: RNA chain | Mass: 497405.969 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #3: RNA chain | Mass: 38790.090 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #4: RNA chain | Mass: 5922.644 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) ![]() |
| #5: RNA chain | Mass: 24966.127 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) ![]() |
-Protein , 2 types, 2 molecules 67
| #6: Protein | Mass: 7147.179 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
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| #7: Protein | Mass: 41314.688 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
+50S ribosomal protein ... , 31 types, 31 molecules BCDEFGHIJKLMNOPQRSTUVWXYZabcdef
-30S ribosomal protein ... , 20 types, 20 molecules ghijklmnopqrstuvwxyz
| #39: Protein | Mass: 26781.670 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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| #40: Protein | Mass: 26031.316 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #41: Protein | Mass: 23514.199 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #42: Protein | Mass: 17629.398 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #43: Protein | Mass: 15727.512 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #44: Protein | Mass: 20055.156 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #45: Protein | Mass: 14146.557 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #46: Protein | Mass: 14886.270 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #47: Protein | Mass: 11755.597 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #48: Protein | Mass: 13870.975 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #49: Protein | Mass: 13814.249 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #50: Protein | Mass: 13128.467 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #51: Protein | Mass: 11606.560 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #52: Protein | Mass: 10290.816 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #53: Protein | Mass: 9207.572 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #54: Protein | Mass: 9724.491 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #55: Protein | Mass: 9005.472 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #56: Protein | Mass: 10455.355 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #57: Protein | Mass: 9708.464 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #58: Protein | Mass: 8524.039 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Non-polymers , 4 types, 443 molecules 






| #59: Chemical | ChemComp-MG / #60: Chemical | ChemComp-FME / | #61: Chemical | #62: Water | ChemComp-HOH / | |
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-Experimental details
-Experiment
| Experiment | Method: ELECTRON MICROSCOPY |
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| EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
| Component | Name: Structure of ArfA(A18T) and RF2 bound to the 70S ribosome (pre-accommodated state) Type: RIBOSOME / Entity ID: #1-#58 / Source: MULTIPLE SOURCES | ||||||||||||||||||||||||||||||
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| Molecular weight | Value: 2 MDa / Experimental value: NO | ||||||||||||||||||||||||||||||
| Buffer solution | pH: 7.4 | ||||||||||||||||||||||||||||||
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| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||||||||
| Specimen support | Grid material: COPPER / Grid mesh size: 400 divisions/in. / Grid type: Quantifoil | ||||||||||||||||||||||||||||||
| Vitrification | Instrument: FEI VITROBOT MARK III / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277.15 K |
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Electron microscopy imaging
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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| Microscopy | Model: FEI TITAN KRIOS |
| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Calibrated magnification: 134615 X / Nominal defocus max: 3000 nm / Nominal defocus min: 2000 nm / Cs: 2.7 mm |
| Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
| Image recording | Average exposure time: 1.2 sec. / Electron dose: 48 e/Å2 / Detector mode: INTEGRATING / Film or detector model: FEI FALCON II (4k x 4k) |
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Processing
| Software | Name: REFMAC / Version: 5.8.0124 / Classification: refinement | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Symmetry | Point symmetry: C1 (asymmetric) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 3D reconstruction | Resolution: 3.06 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 141950 / Symmetry type: POINT | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Atomic model building | B value: 75.3 / Protocol: RIGID BODY FIT / Space: REAL | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Refinement | Resolution: 3.06→291.2 Å / Cor.coef. Fo:Fc: 0.918 / SU B: 10.873 / SU ML: 0.189 / ESU R: 0.375 Stereochemistry target values: MAXIMUM LIKELIHOOD WITH PHASES Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
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| Solvent computation | Solvent model: PARAMETERS FOR MASK CACLULATION | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Displacement parameters | Biso mean: 99.138 Å2
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| Refinement step | Cycle: 1 / Total: 149614 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Refine LS restraints |
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