+ Open data
Open data
- Basic information
Basic information
| Entry | Database: PDB / ID: 5u9f | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Title | 3.2 A cryo-EM ArfA-RF2 ribosome rescue complex (Structure II) | |||||||||
|  Components | 
 | |||||||||
|  Keywords | RIBOSOME / ARFA RF2 ribosome rescue complex | |||||||||
| 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 / 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 / ribosome assembly / regulation of DNA-templated transcription elongation / transcription elongation factor complex / cytosolic ribosome assembly / response to reactive oxygen species / DNA endonuclease activity / transcription antitermination / translational initiation / regulation of cell growth / 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 / small ribosomal subunit 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 / structural constituent of ribosome / ribosome / translation / ribonucleoprotein complex / viral translational frameshifting / response to antibiotic / negative regulation of DNA-templated transcription / mRNA binding / DNA binding / RNA binding / zinc ion binding / metal ion binding / membrane / cytoplasm / cytosol Similarity search - Function | |||||||||
| Biological species |   Escherichia coli (E. coli) | |||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å | |||||||||
|  Authors | Demo, G. / Svidritskiy, E. / Madireddy, R. / Diaz-Avalos, R. / Grant, T. / Grigorieff, N. / Sousa, D. / Korostelev, A.A. | |||||||||
| Funding support |  United States, 2items 
 | |||||||||
|  Citation |  Journal: Elife / Year: 2017 Title: Mechanism of ribosome rescue by ArfA and RF2. Authors: Gabriel Demo / Egor Svidritskiy / Rohini Madireddy / Ruben Diaz-Avalos / Timothy Grant / Nikolaus Grigorieff / Duncan Sousa / Andrei A Korostelev /  Abstract: ArfA rescues ribosomes stalled on truncated mRNAs by recruiting release factor RF2, which normally binds stop codons to catalyze peptide release. We report two 3.2 Å resolution cryo-EM structures - ...ArfA rescues ribosomes stalled on truncated mRNAs by recruiting release factor RF2, which normally binds stop codons to catalyze peptide release. We report two 3.2 Å resolution cryo-EM structures - determined from a single sample - of the 70S ribosome with ArfA•RF2 in the A site. In both states, the ArfA C-terminus occupies the mRNA tunnel downstream of the A site. One state contains a compact inactive RF2 conformation. Ordering of the ArfA N-terminus in the second state rearranges RF2 into an extended conformation that docks the catalytic GGQ motif into the peptidyl-transferase center. Our work thus reveals the structural dynamics of ribosome rescue. The structures demonstrate how ArfA 'senses' the vacant mRNA tunnel and activates RF2 to mediate peptide release without a stop codon, allowing stalled ribosomes to be recycled. | |||||||||
| History | 
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- Structure visualization
Structure visualization
| Movie | 
 
  Movie viewer | 
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| Structure viewer | Molecule:  Molmil  Jmol/JSmol | 
- Downloads & links
Downloads & links
- Download
Download
| PDBx/mmCIF format |  5u9f.cif.gz | 3.8 MB | Display |  PDBx/mmCIF format | 
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| PDB format |  pdb5u9f.ent.gz | Display |  PDB format | |
| PDBx/mmJSON format |  5u9f.json.gz | Tree view |  PDBx/mmJSON format | |
| Others |  Other downloads | 
-Validation report
| Summary document |  5u9f_validation.pdf.gz | 1.4 MB | Display |  wwPDB validaton report | 
|---|---|---|---|---|
| Full document |  5u9f_full_validation.pdf.gz | 1.7 MB | Display | |
| Data in XML |  5u9f_validation.xml.gz | 261.7 KB | Display | |
| Data in CIF |  5u9f_validation.cif.gz | 430 KB | Display | |
| Arichive directory |  https://data.pdbj.org/pub/pdb/validation_reports/u9/5u9f  ftp://data.pdbj.org/pub/pdb/validation_reports/u9/5u9f | HTTPS FTP | 
-Related structure data
| Related structure data |  8521MC  8522C  5u9gC M: map data used to model this data C: citing same article ( | 
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| Similar structure data | 
- Links
Links
- Assembly
Assembly
| Deposited unit |  
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| 1 | 
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- Components
Components
-RNA chain , 5 types, 6 molecules A0102XWV     
| #1: RNA chain | Mass: 498725.406 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: GenBank: 944404559 | ||
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| #2: RNA chain | Mass: 941322.188 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: GenBank: 42756 | ||
| #3: RNA chain | Mass: 38483.926 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: GenBank: 1072784372 | ||
| #5: RNA chain | Mass: 24802.785 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: GenBank: 1114191980 #38: RNA chain |  | Mass: 4597.844 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 | 
-Protein , 2 types, 2 molecules YZ 
| #4: Protein | Mass: 8190.438 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.)   Escherichia coli (E. coli) / Strain: K12 / Gene: arfA, yhdL, b4550, JW3253 / Production host:   Escherichia coli K-12 (bacteria) / References: UniProt: P36675 | 
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| #39: Protein | Mass: 41300.660 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.)   Escherichia coli (E. coli) / Strain: K12 / Gene: prfB, supK, b2891, JW5847 / Production host:   Escherichia coli K-12 (bacteria) / References: UniProt: P07012 | 
+50S ribosomal protein  ... , 32 types, 32 molecules 0304050607080910111213141516171819202122232425262728293031323334                               
-30S ribosomal protein  ... , 20 types, 20 molecules BCDEFGHIJKLMNOPQRSTU                   
| #40: Protein | Mass: 26781.670 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: D7ZK99, UniProt: P0A7V0*PLUS | 
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| #41: Protein | Mass: 26031.316 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: B7MCS9, UniProt: P0A7V3*PLUS | 
| #42: Protein | Mass: 23514.199 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: D7Z9H7, UniProt: P0A7V8*PLUS | 
| #43: Protein | Mass: 17629.398 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: D7Z9H2, UniProt: P0A7W1*PLUS | 
| #44: Protein | Mass: 15211.058 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: D7ZI17, UniProt: P02358*PLUS | 
| #45: Protein | Mass: 17637.445 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: D7ZAN1, UniProt: P02359*PLUS | 
| #46: Protein | Mass: 14146.557 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: D7Z9G9, UniProt: P0A7W7*PLUS | 
| #47: Protein | Mass: 14886.270 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: D7ZES9, UniProt: P0A7X3*PLUS | 
| #48: Protein | Mass: 11755.597 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: D7Z9F4, UniProt: P0A7R5*PLUS | 
| #49: Protein | Mass: 13870.975 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: B7MCR3, UniProt: P0A7R9*PLUS | 
| #50: Protein | Mass: 13768.157 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: D7ZAN0, UniProt: P0A7S3*PLUS | 
| #51: Protein | Mass: 13128.467 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: H4UQ02, UniProt: P0A7S9*PLUS | 
| #52: Protein | Mass: 11606.560 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: D7Z9G8, UniProt: P0AG59*PLUS | 
| #53: Protein | Mass: 10290.816 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: D7ZEL4, UniProt: P0ADZ4*PLUS | 
| #54: Protein | Mass: 9207.572 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: B7MIU7, UniProt: P0A7T3*PLUS | 
| #55: Protein | Mass: 9724.491 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: D7Z9G4, UniProt: P0AG63*PLUS | 
| #56: Protein | Mass: 9005.472 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: A0A0E2KXL3, UniProt: P0A7T7*PLUS | 
| #57: Protein | Mass: 10455.355 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: D7Z9F9, UniProt: P0A7U3*PLUS | 
| #58: Protein | Mass: 9708.464 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: D7ZAS2, UniProt: P0A7U7*PLUS | 
| #59: Protein | Mass: 8524.039 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: A0A0E2L2J1, UniProt: P68679*PLUS | 
-Non-polymers , 2 types, 361 molecules 


| #60: Chemical | ChemComp-MG / #61: Chemical | ChemComp-ZN / |  | 
|---|
-Experimental details
-Experiment
| Experiment | Method: ELECTRON MICROSCOPY | 
|---|---|
| EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction | 
- Sample preparation
Sample preparation
| Component | Name: ArfA-RF2 ribosome rescue complex / Type: RIBOSOME / Entity ID: #1-#59 / Source: MULTIPLE SOURCES | ||||||||||||||||||||||||||||||
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| Molecular weight | Value: 2.5 MDa / Experimental value: NO | ||||||||||||||||||||||||||||||
| Source (natural) | Organism:   Escherichia coli (E. coli) / Strain: MRE600 | ||||||||||||||||||||||||||||||
| Source (recombinant) | Organism:   Escherichia coli (E. coli) / Strain: K-12 | ||||||||||||||||||||||||||||||
| Buffer solution | pH: 7 | ||||||||||||||||||||||||||||||
| Buffer component | 
 | ||||||||||||||||||||||||||||||
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||||||||
| Specimen support | Details: Using a Solarus 950 plasma cleaning system. The forward RF target was set to 7w. Grid material: COPPER / Grid mesh size: 200 divisions/in. / Grid type: C-flat-2/2 | ||||||||||||||||||||||||||||||
| Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 95 % / Chamber temperature: 277.15 K | 
- Electron microscopy imaging
Electron microscopy imaging
| Experimental equipment |  Model: Titan Krios / Image courtesy: FEI Company | 
|---|---|
| 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 / Nominal magnification: 29000 X / Nominal defocus max: 3000 nm / Nominal defocus min: 500 nm / Cs: 2.7 mm / Alignment procedure: COMA FREE | 
| Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER | 
| Image recording | Electron dose: 1.2 e/Å2 / Detector mode: COUNTING / Film or detector model: DIRECT ELECTRON DE-20 (5k x 3k) / Num. of grids imaged: 1 / Num. of real images: 3760 | 
| Image scans | Movie frames/image: 54 / Used frames/image: 2-27 | 
- Processing
Processing
| EM software | 
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||||||
| Particle selection | Num. of particles selected: 539311 | ||||||||||||||||||||||||||||||||||||||||||||
| Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||||||||||||||||||||||
| 3D reconstruction | Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 96070 / Num. of class averages: 1 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||||||
| Atomic model building | B value: 100 / Protocol: OTHER / Space: REAL / Target criteria: Correlation coefficient | 
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