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- PDB-6q9a: Structure of tmRNA SmpB bound past E site of E. coli 70S ribosome -
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Open data
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Basic information
Entry | Database: PDB / ID: 6q9a | |||||||||
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Title | Structure of tmRNA SmpB bound past E site of E. coli 70S ribosome | |||||||||
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![]() | RIBOSOME / tmRNA SmpB trans-translation translation | |||||||||
Function / homology | ![]() trans-translation / negative regulation of cytoplasmic translational initiation / stringent response / ornithine decarboxylase inhibitor activity / transcription antitermination factor activity, RNA binding / misfolded RNA binding / Group I intron splicing / RNA folding / transcriptional attenuation / endoribonuclease inhibitor activity ...trans-translation / negative regulation of cytoplasmic translational initiation / stringent response / 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 translational initiation / negative regulation of DNA-templated DNA replication initiation / regulation of mRNA stability / mRNA regulatory element binding translation repressor activity / ribosome assembly / positive regulation of RNA splicing / assembly of large subunit precursor of preribosome / transcription elongation factor complex / cytosolic ribosome assembly / regulation of DNA-templated transcription elongation / DNA endonuclease activity / ribosomal large subunit assembly / transcription antitermination / response to reactive oxygen species / translational initiation / regulation of cell growth / DNA-templated transcription termination / maintenance of translational fidelity / response to radiation / mRNA 5'-UTR binding / large ribosomal subunit / ribosome biogenesis / ribosome binding / regulation of translation / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / transferase activity / 5S rRNA binding / large ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / cytosolic large ribosomal subunit / cytoplasmic translation / tRNA binding / molecular adaptor activity / rRNA binding / negative regulation of translation / 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 / cytoplasm / cytosol 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
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 4478MC ![]() 4475C ![]() 4476C ![]() 4477C ![]() 6q95C ![]() 6q97C ![]() 6q98C C: citing same article ( M: map data used to model this data |
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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 , 5 types, 5 molecules 12374
#1: RNA chain | Mass: 941526.438 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) ![]() ![]() |
#5: RNA chain | Mass: 24476.531 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#58: RNA chain | Mass: 117198.266 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
#37: Protein | Mass: 25072.867 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#38: Protein | Mass: 23248.994 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#39: Protein | Mass: 23383.002 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#40: Protein | Mass: 16475.037 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#41: Protein | Mass: 12125.993 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#42: Protein | Mass: 16999.670 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#43: Protein | Mass: 14015.361 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#44: Protein | Mass: 14554.882 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#45: Protein | Mass: 11254.041 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#46: Protein | Mass: 12388.068 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#47: Protein | Mass: 13611.976 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#48: Protein | Mass: 12868.091 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#49: Protein | Mass: 11475.364 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#50: Protein | Mass: 10072.543 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#51: Protein | Mass: 9207.572 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#52: Protein | Mass: 9263.946 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#53: Protein | Mass: 7734.896 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#54: Protein | Mass: 9421.018 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#55: Protein | Mass: 9506.190 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#56: Protein | Mass: 8392.844 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-Protein/peptide / Protein , 2 types, 2 molecules 65
#4: Protein/peptide | Mass: 1652.805 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
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#57: Protein | Mass: 13350.365 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
-Non-polymers , 3 types, 441 molecules ![](data/chem/img/MG.gif)
![](data/chem/img/ZN.gif)
![](data/chem/img/HOH.gif)
![](data/chem/img/ZN.gif)
![](data/chem/img/HOH.gif)
#59: Chemical | ChemComp-MG / #60: Chemical | #61: 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
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Source (natural) |
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Source (recombinant) |
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Buffer solution | pH: 7.4 | ||||||||||||||||||||||||||||||||||||
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: 60 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: 47115 / Symmetry type: POINT | ||||||||||||||||||||||||
Atomic model building | PDB-ID: 5MDZ Accession code: 5MDZ / Source name: PDB / Type: experimental model |