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Open data
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Basic information
Entry | Database: PDB / ID: 3j7r | |||||||||||||||
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Title | Structure of the translating mammalian ribosome-Sec61 complex | |||||||||||||||
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![]() | RIBOSOME / mammalian / Sec61 / translocation / translation | |||||||||||||||
Function / homology | ![]() regulation of cell cycle => GO:0051726 / regulation of cell cycle => GO:0051726 / TNFR1-mediated ceramide production / Translation initiation complex formation / Formation of the ternary complex, and subsequently, the 43S complex / Ribosomal scanning and start codon recognition / Regulation of TNFR1 signaling / TNFR1-induced NF-kappa-B signaling pathway / : / L13a-mediated translational silencing of Ceruloplasmin expression ...regulation of cell cycle => GO:0051726 / regulation of cell cycle => GO:0051726 / TNFR1-mediated ceramide production / Translation initiation complex formation / Formation of the ternary complex, and subsequently, the 43S complex / Ribosomal scanning and start codon recognition / Regulation of TNFR1 signaling / TNFR1-induced NF-kappa-B signaling pathway / : / L13a-mediated translational silencing of Ceruloplasmin expression / SRP-dependent cotranslational protein targeting to membrane / Major pathway of rRNA processing in the nucleolus and cytosol / Formation of a pool of free 40S subunits / GTP hydrolysis and joining of the 60S ribosomal subunit / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / pronephric nephron development / Sec61 translocon complex / protein insertion into ER membrane / malate dehydrogenase / protein-transporting ATPase activity / L-malate dehydrogenase (NAD+) activity / translation at presynapse / embryonic brain development / carboxylic acid metabolic process / SRP-dependent cotranslational protein targeting to membrane / post-translational protein targeting to membrane, translocation / positive regulation of gastrulation / protein tyrosine kinase inhibitor activity / protein-DNA complex disassembly / IRE1-RACK1-PP2A complex / positive regulation of Golgi to plasma membrane protein transport / negative regulation of RNA splicing / ribosomal subunit / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / alpha-beta T cell differentiation / neural crest cell differentiation / cysteine-type endopeptidase activator activity involved in apoptotic process / negative regulation of intrinsic apoptotic signaling pathway in response to hydrogen peroxide / regulation of establishment of cell polarity / negative regulation of phagocytosis / cytoplasmic side of rough endoplasmic reticulum membrane / laminin receptor activity / positive regulation of mitochondrial depolarization / organelle membrane / negative regulation of Wnt signaling pathway / negative regulation of translational frameshifting / BH3 domain binding / regulation of cell division / regulation of adenylate cyclase-activating G protein-coupled receptor signaling pathway / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / ubiquitin ligase inhibitor activity / positive regulation of GTPase activity / cellular response to actinomycin D / positive regulation of signal transduction by p53 class mediator / negative regulation of ubiquitin-dependent protein catabolic process / protein serine/threonine kinase inhibitor activity / protein localization to nucleus / membrane => GO:0016020 / protein targeting / phagocytic cup / endonucleolytic cleavage in ITS1 to separate SSU-rRNA from 5.8S rRNA and LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / positive regulation of intrinsic apoptotic signaling pathway / rough endoplasmic reticulum / laminin binding / translation regulator activity / tricarboxylic acid cycle / gastrulation / signaling adaptor activity / negative regulation of proteasomal ubiquitin-dependent protein catabolic process / cytosolic ribosome / rescue of stalled ribosome / class I DNA-(apurinic or apyrimidinic site) endonuclease activity / DNA-(apurinic or apyrimidinic site) lyase / negative regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / SH2 domain binding / cyclin binding / protein kinase C binding / maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / ribosomal large subunit biogenesis / positive regulation of apoptotic signaling pathway / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / mRNA 3'-UTR binding / negative regulation of smoothened signaling pathway / maturation of SSU-rRNA / neural tube closure / small-subunit processome / positive regulation of protein-containing complex assembly / cellular response to glucose stimulus / modification-dependent protein catabolic process / protein tag activity / negative regulation of cell growth / receptor tyrosine kinase binding / maintenance of translational fidelity / cellular response to growth factor stimulus / calcium channel activity / mRNA 5'-UTR binding / spindle / transcription coactivator binding / cytoplasmic ribonucleoprotein granule Similarity search - Function | |||||||||||||||
Biological species | ![]() ![]() | |||||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.9 Å | |||||||||||||||
![]() | Voorhees, R.M. / Fernandez, I.S. / Scheres, S.H.W. / Hegde, R.S. | |||||||||||||||
![]() | ![]() Title: Structure of the mammalian ribosome-Sec61 complex to 3.4 Å resolution. Authors: Rebecca M Voorhees / Israel S Fernández / Sjors H W Scheres / Ramanujan S Hegde / ![]() Abstract: Cotranslational protein translocation is a universally conserved process for secretory and membrane protein biosynthesis. Nascent polypeptides emerging from a translating ribosome are either ...Cotranslational protein translocation is a universally conserved process for secretory and membrane protein biosynthesis. Nascent polypeptides emerging from a translating ribosome are either transported across or inserted into the membrane via the ribosome-bound Sec61 channel. Here, we report structures of a mammalian ribosome-Sec61 complex in both idle and translating states, determined to 3.4 and 3.9 Å resolution. The data sets permit building of a near-complete atomic model of the mammalian ribosome, visualization of A/P and P/E hybrid-state tRNAs, and analysis of a nascent polypeptide in the exit tunnel. Unprecedented chemical detail is observed for both the ribosome-Sec61 interaction and the conformational state of Sec61 upon ribosome binding. Comparison of the maps from idle and translating complexes suggests how conformational changes to the Sec61 channel could facilitate translocation of a secreted polypeptide. The high-resolution structure of the mammalian ribosome-Sec61 complex provides a valuable reference for future functional and structural studies. | |||||||||||||||
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 | ![]() | 5.5 MB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Summary document | ![]() | 1.5 MB | Display | ![]() |
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Full document | ![]() | 2.1 MB | Display | |
Data in XML | ![]() | 385.1 KB | Display | |
Data in CIF | ![]() | 652.1 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 2644MC ![]() 2646C ![]() 2649C ![]() 2650C ![]() 3j7oC ![]() 3j7pC ![]() 3j7qC 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 578S2S4S5S6
#1: RNA chain | Mass: 1206101.875 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#2: RNA chain | Mass: 38691.914 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#3: RNA chain | Mass: 50143.648 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#50: RNA chain | Mass: 561958.812 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#84: RNA chain | Mass: 3039.740 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#85: RNA chain | Mass: 23874.191 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#86: RNA chain | Mass: 24484.555 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
+Ribosomal protein ... , 76 types, 76 molecules ABCDEFGHIJLMNOPQRSTUVWXYZabcde...
-Protein , 2 types, 2 molecules 12
#47: Protein | Mass: 43496.219 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#48: Protein | Mass: 7752.325 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-Protein/peptide , 1 types, 1 molecules 3
#49: Protein/peptide | Mass: 3081.790 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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-Non-polymers , 2 types, 170 molecules 


#87: Chemical | ChemComp-MG / #88: Chemical | ChemComp-ZN / |
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-Details
Has protein modification | Y |
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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: The 80S-Sec61 complex purified from porcine pancreas / Type: RIBOSOME |
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Buffer solution | Name: 50 mM HEPES, 200 mM potassium acetate, 15 mM magnesium acetate, 1 mM DTT, 0.25% Digitonin pH: 7.5 Details: 50 mM HEPES, 200 mM potassium acetate, 15 mM magnesium acetate, 1 mM DTT, 0.25% Digitonin |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Details: Quantifoil R2/2 400 mesh copper grids |
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Temp: 120 K Details: 3 uL sample was incubated on the grid for 30 seconds and blotted for 9 seconds before being plunged into liquid ethane (FEI VITROBOT MARK IV). |
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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 / Date: Apr 7, 2014 |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 59000 X / Calibrated magnification: 104478 X / Nominal defocus max: 3500 nm / Nominal defocus min: 2500 nm / Cs: 2.7 mm |
Specimen holder | Specimen holder type: FEI TITAN KRIOS AUTOGRID HOLDER / Temperature: 70 K / Tilt angle max: 0 ° / Tilt angle min: 0 ° |
Image recording | Electron dose: 27 e/Å2 / Film or detector model: FEI FALCON II (4k x 4k) / Details: Back-thinned |
Radiation | Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Relative weight: 1 |
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Processing
EM software |
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CTF correction | Details: Each particle | |||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | |||||||||||||||||||||||||||||||||||
3D reconstruction | Method: Single particle / Resolution: 3.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 14723 / Nominal pixel size: 1.34 Å / Symmetry type: POINT | |||||||||||||||||||||||||||||||||||
Atomic model building | B value: 37 / Protocol: OTHER / Space: RECIPROCAL / Target criteria: R-factor and FSC / Details: METHOD--Maximum likelihood | |||||||||||||||||||||||||||||||||||
Atomic model building |
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Refinement step | Cycle: LAST
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