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Open data
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Basic information
Entry | Database: PDB / ID: 9g8m | ||||||||||||||||||
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Title | human 80S ribosome bound by a SKI2-exosome complex | ||||||||||||||||||
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![]() | RIBOSOME / RNase / Helicase / RNA-binding / mRNA-degradation / cytoplasm | ||||||||||||||||||
Function / homology | ![]() DNA deamination / nucleolar exosome (RNase complex) / exoribonuclease II activity / exoribonuclease II / Dom34-Hbs1 complex / nuclear-transcribed mRNA catabolic process, no-go decay / U1 snRNA 3'-end processing / U5 snRNA 3'-end processing / TRAMP-dependent tRNA surveillance pathway / Ski complex ...DNA deamination / nucleolar exosome (RNase complex) / exoribonuclease II activity / exoribonuclease II / Dom34-Hbs1 complex / nuclear-transcribed mRNA catabolic process, no-go decay / U1 snRNA 3'-end processing / U5 snRNA 3'-end processing / TRAMP-dependent tRNA surveillance pathway / Ski complex / CUT catabolic process / exosome (RNase complex) / U4 snRNA 3'-end processing / cytoplasmic exosome (RNase complex) / mRNA decay by 3' to 5' exoribonuclease / nuclear polyadenylation-dependent rRNA catabolic process / poly(A)-dependent snoRNA 3'-end processing / nuclear exosome (RNase complex) / nuclear-transcribed mRNA catabolic process, 3'-5' exonucleolytic nonsense-mediated decay / exonucleolytic trimming to generate mature 3'-end of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / Tristetraprolin (TTP, ZFP36) binds and destabilizes mRNA / ATF4 activates genes in response to endoplasmic reticulum stress / histone mRNA catabolic process / Butyrate Response Factor 1 (BRF1) binds and destabilizes mRNA / positive regulation of isotype switching / 3'-5' RNA helicase activity / nuclear mRNA surveillance / rRNA catabolic process / 7S RNA binding / mRNA 3'-UTR AU-rich region binding / eukaryotic 80S initiation complex / negative regulation of protein neddylation / negative regulation of endoplasmic reticulum unfolded protein response / isotype switching / oxidized pyrimidine DNA binding / response to TNF agonist / positive regulation of base-excision repair / negative regulation of formation of translation preinitiation complex / regulation of G1 to G0 transition / axial mesoderm development / negative regulation of peptidyl-serine phosphorylation / positive regulation of respiratory burst involved in inflammatory response / ribosomal protein import into nucleus / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage / 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 / positive regulation of gastrulation / regulation of adenylate cyclase-activating G protein-coupled receptor signaling pathway / protein-DNA complex disassembly / protein tyrosine kinase inhibitor activity / 90S preribosome assembly / IRE1-RACK1-PP2A complex / positive regulation of endodeoxyribonuclease activity / nucleolus organization / positive regulation of Golgi to plasma membrane protein transport / translation at postsynapse / ribosome disassembly / TNFR1-mediated ceramide production / RNA catabolic process / negative regulation of DNA repair / negative regulation of RNA splicing / mammalian oogenesis stage / GAIT complex / A band / positive regulation of DNA damage response, signal transduction by p53 class mediator / supercoiled DNA binding / activation-induced cell death of T cells / TORC2 complex binding / neural crest cell differentiation / alpha-beta T cell differentiation / G1 to G0 transition / NF-kappaB complex / oxidized purine DNA binding / cysteine-type endopeptidase activator activity involved in apoptotic process / middle ear morphogenesis / negative regulation of intrinsic apoptotic signaling pathway in response to hydrogen peroxide / exit from mitosis / ubiquitin-like protein conjugating enzyme binding / regulation of establishment of cell polarity / translation at presynapse / positive regulation of ubiquitin-protein transferase activity / Formation of the ternary complex, and subsequently, the 43S complex / negative regulation of phagocytosis / erythrocyte homeostasis / rRNA modification in the nucleus and cytosol / optic nerve development / cytoplasmic side of rough endoplasmic reticulum membrane / KSRP (KHSRP) binds and destabilizes mRNA / laminin receptor activity / protein kinase A binding / retinal ganglion cell axon guidance / maturation of 5.8S rRNA / negative regulation of ubiquitin protein ligase activity / pigmentation / nuclear chromosome / Ribosomal scanning and start codon recognition / ion channel inhibitor activity / homeostatic process / Translation initiation complex formation / response to aldosterone Similarity search - Function | ||||||||||||||||||
Biological species | ![]() ![]() | ||||||||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å | ||||||||||||||||||
![]() | Koegel, A. / Keidel, A. / Loukeri, M.J. / Kuhn, C.C. / Langer, L.M. / Schaefer, I.B. / Conti, E. | ||||||||||||||||||
Funding support | ![]() ![]()
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![]() | ![]() Title: Structural basis of mRNA decay by the human exosome-ribosome supercomplex. Authors: Alexander Kögel / Achim Keidel / Matina-Jasemi Loukeri / Christopher C Kuhn / Lukas M Langer / Ingmar B Schäfer / Elena Conti / ![]() Abstract: The interplay between translation and mRNA decay is widespread in human cells. In quality-control pathways, exonucleolytic degradation of mRNA associated with translating ribosomes is mediated ...The interplay between translation and mRNA decay is widespread in human cells. In quality-control pathways, exonucleolytic degradation of mRNA associated with translating ribosomes is mediated largely by the cytoplasmic exosome, which includes the exoribonuclease complex EXO10 and the helicase complex SKI238 (refs. ). The helicase can extract mRNA from the ribosome and is expected to transfer it to the exoribonuclease core through a bridging factor, HBS1L3 (also known as SKI7), but the mechanisms of this molecular handover remain unclear. Here we reveal how human EXO10 is recruited by HBS1L3 (SKI7) to an active ribosome-bound SKI238 complex. We show that rather than a sequential handover, a direct physical coupling mechanism takes place, which culminates in the formation of a cytoplasmic exosome-ribosome supercomplex. Capturing the structure during active decay reveals a continuous path in which an RNA substrate threads from the 80S ribosome through the SKI2 helicase into the exoribonuclease active site of the cytoplasmic exosome complex. The SKI3 subunit of the complex directly binds to HBS1L3 (SKI7) and also engages a surface of the 40S subunit, establishing a recognition platform in collided disomes. Exosome and ribosome thus work together as a single structural and functional unit in co-translational mRNA decay, coordinating their activities in a transient supercomplex. | ||||||||||||||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 6.2 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 | ![]() 51132MC ![]() 9g8nC ![]() 9g8oC ![]() 9g8pC ![]() 9g8qC ![]() 9g8rC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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1 |
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Components
-Protein , 7 types, 7 molecules AEMSfSgLILm
#1: Protein | Mass: 137913.688 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() References: UniProt: Q15477, Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement |
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#11: Protein | Mass: 30196.131 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() References: UniProt: Q9Y450, Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement |
#12: Protein | Mass: 125229.984 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
#35: Protein | Mass: 18004.041 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#36: Protein | Mass: 35115.652 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#59: Protein | Mass: 24570.949 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#88: Protein | Mass: 14758.394 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Exosome complex component ... , 9 types, 9 molecules LNOFGHIJK
#2: Protein | Mass: 26416.996 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
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#3: Protein | Mass: 30429.893 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
#4: Protein | Mass: 25636.312 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
#5: Protein | Mass: 32216.762 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
#6: Protein | Mass: 28267.127 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
#7: Protein | Mass: 39512.484 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
#8: Protein | Mass: 33190.355 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
#9: Protein | Mass: 21835.100 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
#10: Protein | Mass: 49370.312 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
-RNA chain , 5 types, 5 molecules XS2L5L7L8
#13: RNA chain | Mass: 78988.750 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) ![]() |
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#14: RNA chain | Mass: 602752.875 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#48: RNA chain | Mass: 1638937.000 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#49: RNA chain | Mass: 38998.078 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#50: RNA chain | Mass: 50449.812 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
+40S ribosomal protein ... , 31 types, 31 molecules SASBSDSESFSHSISKSLSPSQSRSSSTSUSVSXSaScSdSCSGSJSMSNSOSWSYSZSbSe
+60S ribosomal protein ... , 38 types, 38 molecules LALBLCLDLGLHLJLLLMLNLOLPLQLRLSLTLULVLWLXLYLZLaLbLcLdLeLfLgLh...
-Large ribosomal subunit protein ... , 2 types, 2 molecules LELF
#55: Protein | Mass: 32810.176 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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#56: Protein | Mass: 29290.973 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Non-polymers , 2 types, 238 molecules 


#93: Chemical | ChemComp-MG / #94: Chemical | ChemComp-ZN / |
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-Details
Has ligand of interest | Y |
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Has protein modification | Y |
-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: human 80S ribosome bound by a SKI2-exosome complex / Type: RIBOSOME / Entity ID: #1-#92 / Source: MULTIPLE SOURCES |
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Molecular weight | Experimental value: NO |
Source (natural) | Organism: ![]() |
Buffer solution | pH: 7.5 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Grid mesh size: 200 divisions/in. / Grid type: Quantifoil R2/1 |
Vitrification | Cryogen name: ETHANE-PROPANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: TFS KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2400 nm / Nominal defocus min: 600 nm |
Image recording | Electron dose: 64.2 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of real images: 48004 |
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Processing
EM software | Name: PHENIX / Version: 1.20.1_4487: / Category: model refinement | ||||||||||||||||||||||||
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 79353 / Symmetry type: POINT | ||||||||||||||||||||||||
Refinement | Cross valid method: NONE Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||
Displacement parameters | Biso mean: 172.8 Å2 | ||||||||||||||||||||||||
Refine LS restraints |
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