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Open data
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Basic information
Entry | Database: PDB / ID: 8bqx | ||||||
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Title | Yeast 80S ribosome in complex with Map1 (conformation 2) | ||||||
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![]() | RIBOSOME / translation / aminopeptidase / nascent chain / co-translational modification / Map1 | ||||||
Function / homology | ![]() : / Inactivation, recovery and regulation of the phototransduction cascade / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, LSU-rRNA,5S) / methionyl aminopeptidase / negative regulation of glucose mediated signaling pathway / negative regulation of translational frameshifting / positive regulation of translational fidelity / Protein methylation / RMTs methylate histone arginines / mTORC1-mediated signalling ...: / Inactivation, recovery and regulation of the phototransduction cascade / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, LSU-rRNA,5S) / methionyl aminopeptidase / negative regulation of glucose mediated signaling pathway / negative regulation of translational frameshifting / positive regulation of translational fidelity / Protein methylation / RMTs methylate histone arginines / mTORC1-mediated signalling / Protein hydroxylation / ribosome-associated ubiquitin-dependent protein catabolic process / GDP-dissociation inhibitor activity / positive regulation of nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay / pre-mRNA 5'-splice site binding / Formation of the ternary complex, and subsequently, the 43S complex / Translation initiation complex formation / Ribosomal scanning and start codon recognition / cleavage in ITS2 between 5.8S rRNA and LSU-rRNA of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / preribosome, small subunit precursor / response to cycloheximide / mRNA destabilization / Major pathway of rRNA processing in the nucleolus and cytosol / SRP-dependent cotranslational protein targeting to membrane / GTP hydrolysis and joining of the 60S ribosomal subunit / Formation of a pool of free 40S subunits / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / metalloaminopeptidase activity / negative regulation of mRNA splicing, via spliceosome / L13a-mediated translational silencing of Ceruloplasmin expression / preribosome, large subunit precursor / ribosomal large subunit export from nucleus / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / G-protein alpha-subunit binding / positive regulation of protein kinase activity / protein-RNA complex assembly / regulation of translational fidelity / ribosomal small subunit export from nucleus / translation regulator activity / ribosomal subunit export from nucleus / cytosolic ribosome / 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) / DNA-(apurinic or apyrimidinic site) endonuclease activity / cellular response to amino acid starvation / ribosome assembly / rescue of stalled ribosome / maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / 90S preribosome / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of LSU-rRNA / ribosomal large subunit biogenesis / maturation of SSU-rRNA / macroautophagy / small-subunit processome / positive regulation of apoptotic signaling pathway / protein kinase C binding / maintenance of translational fidelity / ribosomal large subunit assembly / cytoplasmic stress granule / modification-dependent protein catabolic process / rRNA processing / protein tag activity / ribosome biogenesis / ribosome binding / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / 5S rRNA binding / large ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / cytosolic large ribosomal subunit / cytoplasmic translation / rRNA binding / negative regulation of translation / ribosome / protein ubiquitination / structural constituent of ribosome / translation / positive regulation of protein phosphorylation / G protein-coupled receptor signaling pathway / negative regulation of gene expression / response to antibiotic / mRNA binding / ubiquitin protein ligase binding / nucleolus / mitochondrion / RNA binding / zinc ion binding / nucleoplasm / nucleus / metal ion binding / cytoplasm / cytosol Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.8 Å | ||||||
![]() | Knorr, A.G. / Mackens-Kiani, T. / Musial, J. / Berninghausen, O. / Becker, T. / Beatrix, B. / Beckmann, R. | ||||||
Funding support | ![]()
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![]() | ![]() Title: The dynamic architecture of Map1- and NatB-ribosome complexes coordinates the sequential modifications of nascent polypeptide chains. Authors: Alexandra G Knorr / Timur Mackens-Kiani / Joanna Musial / Otto Berninghausen / Thomas Becker / Birgitta Beatrix / Roland Beckmann / ![]() Abstract: Cotranslational modification of the nascent polypeptide chain is one of the first events during the birth of a new protein. In eukaryotes, methionine aminopeptidases (MetAPs) cleave off the starter ...Cotranslational modification of the nascent polypeptide chain is one of the first events during the birth of a new protein. In eukaryotes, methionine aminopeptidases (MetAPs) cleave off the starter methionine, whereas N-acetyl-transferases (NATs) catalyze N-terminal acetylation. MetAPs and NATs compete with other cotranslationally acting chaperones, such as ribosome-associated complex (RAC), protein targeting and translocation factors (SRP and Sec61) for binding sites at the ribosomal tunnel exit. Yet, whereas well-resolved structures for ribosome-bound RAC, SRP and Sec61, are available, structural information on the mode of ribosome interaction of eukaryotic MetAPs or of the five cotranslationally active NATs is only available for NatA. Here, we present cryo-EM structures of yeast Map1 and NatB bound to ribosome-nascent chain complexes. Map1 is mainly associated with the dynamic rRNA expansion segment ES27a, thereby kept at an ideal position below the tunnel exit to act on the emerging substrate nascent chain. For NatB, we observe two copies of the NatB complex. NatB-1 binds directly below the tunnel exit, again involving ES27a, and NatB-2 is located below the second universal adapter site (eL31 and uL22). The binding mode of the two NatB complexes on the ribosome differs but overlaps with that of NatA and Map1, implying that NatB binds exclusively to the tunnel exit. We further observe that ES27a adopts distinct conformations when bound to NatA, NatB, or Map1, together suggesting a contribution to the coordination of a sequential activity of these factors on the emerging nascent chain at the ribosomal exit tunnel. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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PDBx/mmCIF format | ![]() | 4.5 MB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Summary document | ![]() | 2.1 MB | Display | ![]() |
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Full document | ![]() | 2.2 MB | Display | |
Data in XML | ![]() | 352.3 KB | Display | |
Data in CIF | ![]() | 604.1 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 16191MC ![]() 8bipC ![]() 8bjqC ![]() 8bqdC 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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Components
-Protein , 6 types, 6 molecules xOBDAGBGAI
#1: Protein | Mass: 43435.293 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#16: Protein | Mass: 34151.484 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#51: Protein | Mass: 25080.062 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#52: Protein | Mass: 19266.082 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#69: Protein | Mass: 14478.054 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#74: Protein | Mass: 8714.363 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
+40S ribosomal protein ... , 32 types, 32 molecules ABCDEFGHIJKLMNPQRSTUVWXYZabcdefg
+60S ribosomal protein ... , 38 types, 38 molecules AABAABBBACBCAWBEBIBMBOADAJAMAQAUAXBFBHBJBLAEAHAKANARAVAYBKBN...
-RNA chain , 4 types, 4 molecules 2BQBRBS
#34: RNA chain | Mass: 579126.562 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#42: RNA chain | Mass: 1066787.000 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#43: RNA chain | Mass: 38951.105 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#44: RNA chain | Mass: 50682.922 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-Non-polymers , 1 types, 7 molecules ![](data/chem/img/ZN.gif)
#81: Chemical | ChemComp-ZN / |
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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 |
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Sample preparation
Component | Name: Yeast 80S ribosome in complex with Map1 / Type: RIBOSOME / Entity ID: #1-#80 / Source: NATURAL |
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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 |
Vitrification | Cryogen name: ETHANE |
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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 |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 3200 nm / Nominal defocus min: 500 nm |
Image recording | Electron dose: 56.16 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
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Processing
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||
3D reconstruction | Resolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 13307 / Symmetry type: POINT | |||||||||
Refinement | Cross valid method: NONE |