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- PDB-6q95: Structure of tmRNA SmpB bound in A site of T. thermophilus 70S ri... -
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Open data
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Basic information
Entry | Database: PDB / ID: 6q95 | |||||||||
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Title | Structure of tmRNA SmpB bound in A site of T. thermophilus 70S ribosome | |||||||||
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![]() | RIBOSOME / tmRNA SmpB trans-translation translation | |||||||||
Function / homology | ![]() trans-translation / large ribosomal subunit / regulation of translation / 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 ...trans-translation / large ribosomal subunit / regulation of translation / 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 / mRNA binding / zinc ion binding / metal ion binding / cytosol / cytoplasm Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() ![]() | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.7 Å | |||||||||
![]() | Rae, C.D. | |||||||||
Funding support | ![]()
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![]() | ![]() Title: How a circularized tmRNA moves through the ribosome. Authors: Christopher D Rae / Yuliya Gordiyenko / V Ramakrishnan / ![]() Abstract: During trans-translation, transfer-messenger RNA (tmRNA) and small protein B (SmpB) together rescue ribosomes stalled on a truncated mRNA and tag the nascent polypeptide for degradation. We used cryo- ...During trans-translation, transfer-messenger RNA (tmRNA) and small protein B (SmpB) together rescue ribosomes stalled on a truncated mRNA and tag the nascent polypeptide for degradation. We used cryo-electron microscopy to determine the structures of three key states of the tmRNA-SmpB-ribosome complex during trans translation at resolutions of 3.7 to 4.4 angstroms. The results show how tmRNA and SmpB act specifically on stalled ribosomes and how the circularized complex moves through the ribosome, enabling translation to switch from the old defective message to the reading frame on tmRNA. | |||||||||
History |
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 3.4 MB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 1.1 MB | Display | ![]() |
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Full document | ![]() | 1.4 MB | Display | |
Data in XML | ![]() | 243.6 KB | Display | |
Data in CIF | ![]() | 421.5 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 4475MC ![]() 4476C ![]() 4477C ![]() 4478C ![]() 6q97C ![]() 6q98C ![]() 6q9aC 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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1 |
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Components
-RNA chain , 7 types, 7 molecules 2789134
#1: RNA chain | Mass: 493958.281 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: GenBank: 55771382 |
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#22: RNA chain | Mass: 24816.811 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#23: RNA chain | Mass: 24400.418 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#24: RNA chain | Mass: 1853.133 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) ![]() ![]() |
#34: RNA chain | Mass: 947935.438 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() |
#35: RNA chain | Mass: 38553.000 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: GenBank: 55771382 |
#60: RNA chain | Mass: 112818.945 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Production host: ![]() ![]() |
-30S ribosomal protein ... , 20 types, 20 molecules ghijklmnopqrstuvwxyz
#2: Protein | Mass: 27116.385 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: UniProt: P80371 |
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#3: Protein | Mass: 22975.588 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: UniProt: P80372 |
#4: Protein | Mass: 24242.254 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: UniProt: P80373 |
#5: Protein | Mass: 16460.193 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: UniProt: Q5SHQ5 |
#6: Protein | Mass: 11988.753 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: UniProt: Q5SLP8 |
#7: Protein | Mass: 17919.775 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: UniProt: P17291 |
#8: Protein | Mass: 15868.570 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: UniProt: P0DOY9 |
#9: Protein | Mass: 14298.466 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: UniProt: P80374 |
#10: Protein | Mass: 11398.308 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: UniProt: Q5SHN7 |
#11: Protein | Mass: 12606.369 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: UniProt: P80376 |
#12: Protein | Mass: 13875.388 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: UniProt: Q5SHN3 |
#13: Protein | Mass: 13623.920 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: UniProt: P80377 |
#14: Protein | Mass: 7027.529 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: UniProt: P0DOY6 |
#15: Protein | Mass: 10447.213 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: UniProt: Q5SJ76 |
#16: Protein | Mass: 9995.546 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: UniProt: Q5SJH3 |
#17: Protein | Mass: 11880.098 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: UniProt: P0DOY7 |
#18: Protein | Mass: 8155.812 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: UniProt: Q5SLQ0 |
#19: Protein | Mass: 9006.486 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: UniProt: Q5SHP2 |
#20: Protein | Mass: 10921.086 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: UniProt: P80380 |
#21: Protein/peptide | Mass: 3089.655 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() References: UniProt: Q5SIH3 |
+50S ribosomal protein ... , 31 types, 32 molecules WXYZabcdeABCDEFGJKLMNOPQRSTUVfHI
-Protein / Protein/peptide , 2 types, 2 molecules 56
#56: Protein | Mass: 16785.490 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Gene: smpB, TTHA0902 / Production host: ![]() ![]() |
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#57: Protein/peptide | Mass: 220.289 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
-Non-polymers , 2 types, 640 molecules 


#61: Chemical | ChemComp-MG / #62: Chemical | |
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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
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Source (natural) |
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Source (recombinant) |
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Buffer solution | pH: 7.5 | ||||||||||||||||||||||||||||||||||||||||||||||||
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||||||||||||||||||||||||||
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Tecnai Polara / Image courtesy: FEI Company |
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Microscopy | Model: FEI POLARA 300 |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD |
Image recording | Electron dose: 42 e/Å2 / Film or detector model: FEI FALCON II (4k x 4k) |
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Processing
EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||
3D reconstruction | Resolution: 3.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 24400 / Symmetry type: POINT |