+Open data
-Basic information
Entry | Database: PDB / ID: 6w6l | ||||||||||||||||||
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Title | Cryo-EM structure of the human ribosome-TMCO1 translocon | ||||||||||||||||||
Components |
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Keywords | RIBOSOME/PROTEIN TRANSPORT / RIBOSOME-PROTEIN TRANSPORT complex | ||||||||||||||||||
Function / homology | Function and homology information : / endoplasmic reticulum Sec complex / endoplasmic reticulum quality control compartment / pronephric nephron development / rough endoplasmic reticulum membrane / cotranslational protein targeting to membrane / Ssh1 translocon complex / Sec61 translocon complex / protein targeting to ER / protein insertion into ER membrane ...: / endoplasmic reticulum Sec complex / endoplasmic reticulum quality control compartment / pronephric nephron development / rough endoplasmic reticulum membrane / cotranslational protein targeting to membrane / Ssh1 translocon complex / Sec61 translocon complex / protein targeting to ER / protein insertion into ER membrane / regulation of protein complex stability / post-translational protein targeting to endoplasmic reticulum membrane / embryonic brain development / eukaryotic 80S initiation complex / negative regulation of protein neddylation / SRP-dependent cotranslational protein targeting to membrane, translocation / translation at presynapse / axial mesoderm development / negative regulation of formation of translation preinitiation complex / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator / regulation of translation involved in cellular response to UV / exit from mitosis / 90S preribosome assembly / positive regulation of DNA damage response, signal transduction by p53 class mediator resulting in transcription of p21 class mediator / signal sequence binding / optic nerve development / SRP-dependent cotranslational protein targeting to membrane / TORC2 complex binding / post-translational protein targeting to membrane, translocation / endoplasmic reticulum calcium ion homeostasis / endoplasmic reticulum organization / GAIT complex / retinal ganglion cell axon guidance / middle ear morphogenesis / cytoplasmic side of rough endoplasmic reticulum membrane / ERAD pathway / A band / positive regulation of signal transduction by p53 class mediator / retrograde protein transport, ER to cytosol / ubiquitin ligase inhibitor activity / alpha-beta T cell differentiation / negative regulation of ubiquitin protein ligase activity / epidermal growth factor binding / Insertion of tail-anchored proteins into the endoplasmic reticulum membrane / response to aldosterone / homeostatic process / lung morphogenesis / macrophage chemotaxis / ER overload response / Protein hydroxylation / Peptide chain elongation / Selenocysteine synthesis / protein-RNA complex assembly / Formation of a pool of free 40S subunits / Eukaryotic Translation Termination / blastocyst development / Response of EIF2AK4 (GCN2) to amino acid deficiency / translation regulator activity / SRP-dependent cotranslational protein targeting to membrane / Viral mRNA Translation / protein transmembrane transporter activity / protein localization to nucleus / regulation of protein-containing complex assembly / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / GTP hydrolysis and joining of the 60S ribosomal subunit / negative regulation of proteasomal ubiquitin-dependent protein catabolic process / L13a-mediated translational silencing of Ceruloplasmin expression / Major pathway of rRNA processing in the nucleolus and cytosol / protein targeting / rough endoplasmic reticulum / regulation of signal transduction / MDM2/MDM4 family protein binding / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / : / DNA damage response, signal transduction by p53 class mediator resulting in cell cycle arrest / maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of LSU-rRNA / negative regulation of ubiquitin-dependent protein catabolic process / ribosomal large subunit biogenesis / embryo implantation / cellular response to interleukin-4 / ossification / cytosolic ribosome / post-embryonic development / positive regulation of translation / innate immune response in mucosa / regulation of signal transduction by p53 class mediator / mRNA 3'-UTR binding / skeletal system development / calcium ion transmembrane transport / sensory perception of sound / cellular response to gamma radiation / calcium channel activity / mRNA 5'-UTR binding / bone development / ribosomal large subunit assembly / intracellular calcium ion homeostasis / cytoplasmic ribonucleoprotein granule / rRNA processing / osteoblast differentiation Similarity search - Function | ||||||||||||||||||
Biological species | Homo sapiens (human) | ||||||||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.84 Å | ||||||||||||||||||
Authors | Keenan, R.J. / McGilvray, P.T. | ||||||||||||||||||
Funding support | United States, 5items
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Citation | Journal: Elife / Year: 2020 Title: An ER translocon for multi-pass membrane protein biogenesis. Authors: Philip T McGilvray / S Andrei Anghel / Arunkumar Sundaram / Frank Zhong / Michael J Trnka / James R Fuller / Hong Hu / Alma L Burlingame / Robert J Keenan / Abstract: Membrane proteins with multiple transmembrane domains play critical roles in cell physiology, but little is known about the machinery coordinating their biogenesis at the endoplasmic reticulum. Here ...Membrane proteins with multiple transmembrane domains play critical roles in cell physiology, but little is known about the machinery coordinating their biogenesis at the endoplasmic reticulum. Here we describe a ~ 360 kDa ribosome-associated complex comprising the core Sec61 channel and five accessory factors: TMCO1, CCDC47 and the Nicalin-TMEM147-NOMO complex. Cryo-electron microscopy reveals a large assembly at the ribosome exit tunnel organized around a central membrane cavity. Similar to protein-conducting channels that facilitate movement of transmembrane segments, cytosolic and luminal funnels in TMCO1 and TMEM147, respectively, suggest routes into the central membrane cavity. High-throughput mRNA sequencing shows selective translocon engagement with hundreds of different multi-pass membrane proteins. Consistent with a role in multi-pass membrane protein biogenesis, cells lacking different accessory components show reduced levels of one such client, the glutamate transporter EAAT1. These results identify a new human translocon and provide a molecular framework for understanding its role in multi-pass membrane protein biogenesis. | ||||||||||||||||||
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 | 6w6l.cif.gz | 5.4 MB | Display | PDBx/mmCIF format |
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PDB format | pdb6w6l.ent.gz | Display | PDB format | |
PDBx/mmJSON format | 6w6l.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/w6/6w6l ftp://data.pdbj.org/pub/pdb/validation_reports/w6/6w6l | HTTPS FTP |
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-Related structure data
Related structure data | 21435MC 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
+60S ribosomal protein ... , 41 types, 41 molecules ABCFGHIJKLMNOPQRSTUVWXYZabcdef...
-RNA chain , 5 types, 5 molecules DEtuv
#4: RNA chain | Mass: 50449.812 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: GenBank: 555853 |
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#5: RNA chain | Mass: 38385.750 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) |
#44: RNA chain | Mass: 1159525.750 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) |
#45: RNA chain | Mass: 24414.451 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) |
#46: RNA chain | Mass: 24436.508 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) |
-Protein/peptide , 1 types, 1 molecules y
#47: Protein/peptide | Mass: 2315.846 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) |
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-Protein transport protein Sec61 subunit ... , 3 types, 3 molecules 123
#48: Protein | Mass: 52295.379 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P61619 |
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#49: Protein | Mass: 7752.325 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P60059 |
#50: Protein | Mass: 9987.456 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P60468 |
-Protein , 4 types, 4 molecules 4576
#51: Protein | Mass: 25279.848 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9BVK8 |
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#52: Protein | Mass: 63047.145 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q969V3 |
#53: Protein | Mass: 55946.762 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q96A33 |
#54: Protein | Mass: 21205.008 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9UM00 |
-Non-polymers , 3 types, 32 molecules
#55: Chemical | ChemComp-MG / #56: Chemical | #57: Water | ChemComp-HOH / | |
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-Details
Has ligand of interest | N |
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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: human ribosome-TMCO1 translocon / Type: COMPLEX / Entity ID: #1-#54 / Source: NATURAL | |||||||||||||||||||||||||
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Molecular weight | Value: 4 MDa / Experimental value: NO | |||||||||||||||||||||||||
Source (natural) | Organism: Homo sapiens (human) | |||||||||||||||||||||||||
Buffer solution | pH: 7.4 | |||||||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 0.4 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES Details: The sample was well dispersed on a thin carbon film | |||||||||||||||||||||||||
Specimen support | Grid material: COPPER / Grid mesh size: 200 divisions/in. / Grid type: C-flat-1.2/1.3 | |||||||||||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 298 K Details: Two filter papers were added to each arm, 2.5 microliters of sample were added to the grids, and 0.5 seconds of drain time was allowed before vitrification. |
-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 FIELDBright-field microscopy |
Image recording | Average exposure time: 3.8 sec. / Electron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 5562 |
-Processing
EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 1049128 | ||||||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 3.84 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 82684 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||
Atomic model building | Space: REAL Details: Starting models: 60S ribosomal subunit, tRNAs and nascent chain from 6om0. Sec61 heterotrimer from 6fti. Nicalin, TMEM147 are iTasser homology models based on 5a63. TMCO1 and CCDC47 are co- ...Details: Starting models: 60S ribosomal subunit, tRNAs and nascent chain from 6om0. Sec61 heterotrimer from 6fti. Nicalin, TMEM147 are iTasser homology models based on 5a63. TMCO1 and CCDC47 are co-evolution-based models from RaptorX-Contact. | ||||||||||||||||||||||||||||||||||||||||
Atomic model building |
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