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Yorodumi- PDB-5mdv: Structure of ArfA and RF2 bound to the 70S ribosome (accommodated... -
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-Basic information
Entry | Database: PDB / ID: 5mdv | |||||||||
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Title | Structure of ArfA and RF2 bound to the 70S ribosome (accommodated state) | |||||||||
Components |
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Keywords | RIBOSOME / ribosome ArfA RF2 trans-translation 70S 50S 30S rescue termination cryo-EM | |||||||||
Function / homology | Function and homology information 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 ...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 / RNA-binding transcription regulator activity / positive regulation of ribosome biogenesis / negative regulation of cytoplasmic translation / four-way junction DNA binding / translational termination / DnaA-L2 complex / translation repressor activity / negative regulation of DNA-templated DNA replication initiation / negative regulation of translational initiation / regulation of mRNA stability / mRNA regulatory element binding translation repressor activity / rescue of stalled ribosome / ribosome assembly / assembly of large subunit precursor of preribosome / positive regulation of RNA splicing / transcription elongation factor complex / cytosolic ribosome assembly / regulation of DNA-templated transcription elongation / DNA endonuclease activity / response to reactive oxygen species / transcription antitermination / regulation of cell growth / translational initiation / DNA-templated transcription termination / maintenance of translational fidelity / response to radiation / mRNA 5'-UTR binding / ribosomal small subunit biogenesis / small ribosomal subunit rRNA binding / large ribosomal subunit / ribosome biogenesis / ribosome binding / regulation of translation / ribosomal small subunit assembly / small ribosomal subunit / 5S rRNA binding / large ribosomal subunit rRNA binding / transferase activity / cytosolic small ribosomal subunit / ribosomal large subunit assembly / cytoplasmic translation / cytosolic large ribosomal subunit / tRNA binding / molecular adaptor activity / negative regulation of translation / rRNA binding / ribosome / structural constituent of ribosome / translation / viral translational frameshifting / 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 | Escherichia coli (E. coli) | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.97 Å | |||||||||
Authors | James, N.R. / Brown, A. / Gordiyenko, Y. / Ramakrishnan, V. | |||||||||
Funding support | United Kingdom, 2items
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Citation | Journal: Science / Year: 2016 Title: 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. | |||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | Molecule: MolmilJmol/JSmol |
-Downloads & links
-Download
PDBx/mmCIF format | 5mdv.cif.gz | 3.7 MB | Display | PDBx/mmCIF format |
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PDB format | pdb5mdv.ent.gz | Display | PDB format | |
PDBx/mmJSON format | 5mdv.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Summary document | 5mdv_validation.pdf.gz | 1.5 MB | Display | wwPDB validaton report |
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Full document | 5mdv_full_validation.pdf.gz | 1.6 MB | Display | |
Data in XML | 5mdv_validation.xml.gz | 214.2 KB | Display | |
Data in CIF | 5mdv_validation.cif.gz | 379.5 KB | Display | |
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/md/5mdv ftp://data.pdbj.org/pub/pdb/validation_reports/md/5mdv | HTTPS FTP |
-Related structure data
Related structure data | 3489MC 3490C 3492C 3493C 5mdwC 5mdyC 5mdzC M: map data used to model this data C: citing same article (ref.) |
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Similar structure data |
-Links
-Assembly
Deposited unit |
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1 |
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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) Escherichia coli (E. coli) / References: GenBank: 802133627 |
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#2: RNA chain | Mass: 497405.969 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: GenBank: 802133627 |
#3: RNA chain | Mass: 38790.090 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: GenBank: 1028480521 |
#4: RNA chain | Mass: 5922.644 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Escherichia coli (E. coli) |
#5: RNA chain | Mass: 24966.127 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Escherichia coli (E. coli) |
-Protein , 2 types, 2 molecules 67
#6: Protein | Mass: 7117.153 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Escherichia coli (E. coli) / Gene: arfA, yhdL, b4550, JW3253 / Production host: Escherichia coli (E. coli) / References: UniProt: P36675 |
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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.) Escherichia coli (E. coli) / Gene: prfB, supK, b2891, JW5847 / Production host: Escherichia coli (E. coli) / References: UniProt: P07012 |
+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) Escherichia coli (E. coli) / References: UniProt: P0A7V0 |
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#40: Protein | Mass: 26031.316 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7V3 |
#41: Protein | Mass: 23514.199 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7V8 |
#42: Protein | Mass: 17629.398 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7W1 |
#43: Protein | Mass: 15727.512 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P02358 |
#44: Protein | Mass: 20055.156 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P02359 |
#45: Protein | Mass: 14146.557 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7W7 |
#46: Protein | Mass: 14886.270 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7X3 |
#47: Protein | Mass: 11755.597 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7R5 |
#48: Protein | Mass: 13870.975 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7R9 |
#49: Protein | Mass: 13814.249 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7S3 |
#50: Protein | Mass: 13128.467 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7S9 |
#51: Protein | Mass: 11606.560 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0AG59 |
#52: Protein | Mass: 10290.816 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0ADZ4 |
#53: Protein | Mass: 9207.572 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7T3 |
#54: Protein | Mass: 9724.491 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0AG63 |
#55: Protein | Mass: 9005.472 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7T7 |
#56: Protein | Mass: 10455.355 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7U3 |
#57: Protein | Mass: 9708.464 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7U7 |
#58: Protein | Mass: 8524.039 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P68679 |
-Non-polymers , 4 types, 445 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 |
-Sample preparation
Component | Name: Structure of ArfA and RF2 bound to the 70S ribosome (accommodated state) Type: RIBOSOME / Entity ID: #1-#58 / Source: MULTIPLE SOURCES | ||||||||||||||||||||||||||||||
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Molecular weight | Value: 2 MDa / Experimental value: NO | ||||||||||||||||||||||||||||||
Source (natural) | Organism: Escherichia coli (E. coli) | ||||||||||||||||||||||||||||||
Buffer solution | pH: 7.4 | ||||||||||||||||||||||||||||||
Buffer component |
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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 |
-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) |
-Processing
Software | Name: REFMAC / Version: 5.8.0124 / Classification: refinement | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 2.97 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 139792 / Symmetry type: POINT | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Atomic model building | B value: 75.3 / Protocol: RIGID BODY FIT / Space: REAL | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement | Resolution: 2.97→291.2 Å / Cor.coef. Fo:Fc: 0.888 / SU B: 9.543 / SU ML: 0.174 / ESU R: 0.344 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: 75.32 Å2
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Refinement step | Cycle: 1 / Total: 149899 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refine LS restraints |
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