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- PDB-6i0y: TnaC-stalled ribosome complex with the titin I27 domain folding c... -
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Basic information
Entry | Database: PDB / ID: 6i0y | ||||||
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Title | TnaC-stalled ribosome complex with the titin I27 domain folding close to the ribosomal exit tunnel | ||||||
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![]() | RIBOSOME / Protein folding / ribosomal exit tunnel / nascent chain / titin I27 domain | ||||||
Function / homology | ![]() positive regulation of L-tryptophan metabolic process / transcriptional attenuation by ribosome / sarcomerogenesis / titin-telethonin complex / structural molecule activity conferring elasticity / skeletal muscle myosin thick filament assembly / telethonin binding / detection of muscle stretch / protein kinase A signaling / muscle alpha-actinin binding ...positive regulation of L-tryptophan metabolic process / transcriptional attenuation by ribosome / sarcomerogenesis / titin-telethonin complex / structural molecule activity conferring elasticity / skeletal muscle myosin thick filament assembly / telethonin binding / detection of muscle stretch / protein kinase A signaling / muscle alpha-actinin binding / L-tryptophan catabolic process / cardiac myofibril assembly / mitotic chromosome condensation / cardiac muscle hypertrophy / cardiac muscle tissue morphogenesis / actinin binding / Striated Muscle Contraction / muscle filament sliding / protein kinase regulator activity / M band / I band / cardiac muscle cell development / structural constituent of muscle / sarcomere organization / stringent response / striated muscle thin filament / skeletal muscle thin filament assembly / skeletal muscle contraction / transcriptional attenuation / positive regulation of ribosome biogenesis / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / striated muscle contraction / translational termination / negative regulation of cytoplasmic translation / DnaA-L2 complex / cardiac muscle contraction / translation repressor activity / muscle contraction / negative regulation of DNA-templated DNA replication initiation / mRNA regulatory element binding translation repressor activity / assembly of large subunit precursor of preribosome / ribosome assembly / condensed nuclear chromosome / cytosolic ribosome assembly / response to reactive oxygen species / positive regulation of protein secretion / regulation of cell growth / DNA-templated transcription termination / response to radiation / Z disc / mRNA 5'-UTR binding / response to calcium ion / actin filament binding / Platelet degranulation / large ribosomal subunit / transferase activity / ribosome binding / 5S rRNA binding / protease binding / ribosomal large subunit assembly / large ribosomal subunit rRNA binding / protein tyrosine kinase activity / cytosolic large ribosomal subunit / cytoplasmic translation / eukaryotic translation initiation factor 2alpha kinase activity / tRNA binding / 3-phosphoinositide-dependent protein kinase activity / DNA-dependent protein kinase activity / ribosomal protein S6 kinase activity / histone H3S10 kinase activity / histone H2AXS139 kinase activity / histone H3S28 kinase activity / histone H4S1 kinase activity / histone H2BS14 kinase activity / histone H3T3 kinase activity / histone H2AS121 kinase activity / Rho-dependent protein serine/threonine kinase activity / histone H2BS36 kinase activity / histone H3S57 kinase activity / histone H2AT120 kinase activity / AMP-activated protein kinase activity / histone H2AS1 kinase activity / histone H3T6 kinase activity / histone H3T11 kinase activity / histone H3T45 kinase activity / non-specific serine/threonine protein kinase / calmodulin binding / negative regulation of translation / rRNA binding / ribosome / structural constituent of ribosome / translation / response to antibiotic / protein serine kinase activity / protein serine/threonine kinase activity / negative regulation of DNA-templated transcription / mRNA binding / calcium ion binding / positive regulation of gene expression Similarity search - Function | ||||||
Biological species | ![]() ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å | ||||||
![]() | Su, T. / Kudva, R. / von Heijne, G. / Beckmann, R. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Folding pathway of an Ig domain is conserved on and off the ribosome. Authors: Pengfei Tian / Annette Steward / Renuka Kudva / Ting Su / Patrick J Shilling / Adrian A Nickson / Jeffrey J Hollins / Roland Beckmann / Gunnar von Heijne / Jane Clarke / Robert B Best / ![]() ![]() ![]() ![]() Abstract: Proteins that fold cotranslationally may do so in a restricted configurational space, due to the volume occupied by the ribosome. How does this environment, coupled with the close proximity of the ...Proteins that fold cotranslationally may do so in a restricted configurational space, due to the volume occupied by the ribosome. How does this environment, coupled with the close proximity of the ribosome, affect the folding pathway of a protein? Previous studies have shown that the cotranslational folding process for many proteins, including small, single domains, is directly affected by the ribosome. Here, we investigate the cotranslational folding of an all-β Ig domain, titin I27. Using an arrest peptide-based assay and structural studies by cryo-EM, we show that I27 folds in the mouth of the ribosome exit tunnel. Simulations that use a kinetic model for the force dependence of escape from arrest accurately predict the fraction of folded protein as a function of length. We used these simulations to probe the folding pathway on and off the ribosome. Our simulations-which also reproduce experiments on mutant forms of I27-show that I27 folds, while still sequestered in the mouth of the ribosome exit tunnel, by essentially the same pathway as free I27, with only subtle shifts of critical contacts from the C to the N terminus. | ||||||
History |
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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PDBx/mmCIF format | ![]() | 2.3 MB | Display | ![]() |
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PDB format | ![]() | 1.8 MB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 0322MC 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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Components
+50S ribosomal protein ... , 31 types, 31 molecules h01234568CDEFGHIJKLMNOPQRSTWXYZ
-RNA chain , 3 types, 3 molecules ABV
#11: RNA chain | Mass: 941306.188 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#12: RNA chain | Mass: 38177.762 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#31: RNA chain | Mass: 24876.777 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-Protein/peptide / Protein , 2 types, 2 molecules 7z
#36: Protein | Mass: 9794.193 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() References: UniProt: Q8WZ42, non-specific serine/threonine protein kinase |
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#9: Protein/peptide | Mass: 2899.416 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
-Non-polymers , 4 types, 584 molecules 






#37: Chemical | ChemComp-MG / #38: Chemical | ChemComp-ZN / | #39: Chemical | ChemComp-TRP / | #40: Water | ChemComp-HOH / | |
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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
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Source (recombinant) |
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Buffer solution | pH: 7.5 | ||||||||||||||||||||||||||||||
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||||||||
Specimen support | Grid material: COPPER / Grid type: Quantifoil R2/2 | ||||||||||||||||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277.15 K |
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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: 3000 nm / Nominal defocus min: 1000 nm / Cs: 2.7 mm / C2 aperture diameter: 70 µm |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Electron dose: 0.926 e/Å2 / Film or detector model: GATAN K2 QUANTUM (4k x 4k) / Num. of grids imaged: 1 / Num. of real images: 2613 |
Image scans | Movie frames/image: 30 |
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Processing
EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||
Particle selection | Num. of particles selected: 468015 | ||||||||||||
3D reconstruction | Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 301510 / Symmetry type: POINT |