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Yorodumi- PDB-7nsi: 55S mammalian mitochondrial ribosome with mtRRF (pre) and tRNA(P/E) -
+Open data
-Basic information
Entry | Database: PDB / ID: 7nsi | |||||||||
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Title | 55S mammalian mitochondrial ribosome with mtRRF (pre) and tRNA(P/E) | |||||||||
Components |
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Keywords | TRANSLATION / Ribosome / Mitochondria / mtRRF / Recycling | |||||||||
Function / homology | Function and homology information Mitochondrial translation elongation / Mitochondrial translation termination / rRNA import into mitochondrion / mitochondrial transcription / mitochondrial ribosome assembly / mitochondrial translational elongation / mitochondrial translational termination / ribonuclease III activity / microprocessor complex / translation release factor activity, codon nonspecific ...Mitochondrial translation elongation / Mitochondrial translation termination / rRNA import into mitochondrion / mitochondrial transcription / mitochondrial ribosome assembly / mitochondrial translational elongation / mitochondrial translational termination / ribonuclease III activity / microprocessor complex / translation release factor activity, codon nonspecific / Mitochondrial translation termination / Mitochondrial protein degradation / ribosome disassembly / mitochondrial large ribosomal subunit / peptidyl-tRNA hydrolase / mitochondrial small ribosomal subunit / aminoacyl-tRNA hydrolase activity / mitochondrial ribosome / mitochondrial translation / ribosomal large subunit binding / organelle membrane / positive regulation of proteolysis / ribosomal small subunit binding / RNA processing / rescue of stalled ribosome / cellular response to leukemia inhibitory factor / double-stranded RNA binding / ribosome biogenesis / cell junction / regulation of translation / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / 5S rRNA binding / cytosolic small ribosomal subunit / cytosolic large ribosomal subunit / cytoplasmic translation / nuclear body / rRNA binding / negative regulation of translation / ribosome / structural constituent of ribosome / mitochondrial matrix / ribonucleoprotein complex / translation / cell cycle / protein domain specific binding / nucleotide binding / mRNA binding / apoptotic process / synapse / nucleolus / positive regulation of DNA-templated transcription / mitochondrion / RNA binding / nucleoplasm / nucleus / plasma membrane / cytosol Similarity search - Function | |||||||||
Biological species | Homo sapiens (human) Sus scrofa (pig) | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.6 Å | |||||||||
Authors | Kummer, E. / Schubert, K. / Ban, N. | |||||||||
Funding support | Switzerland, 2items
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Citation | Journal: Mol Cell / Year: 2021 Title: Structural basis of translation termination, rescue, and recycling in mammalian mitochondria. Authors: Eva Kummer / Katharina Noel Schubert / Tanja Schoenhut / Alain Scaiola / Nenad Ban / Abstract: The mitochondrial translation system originates from a bacterial ancestor but has substantially diverged in the course of evolution. Here, we use single-particle cryo-electron microscopy (cryo-EM) as ...The mitochondrial translation system originates from a bacterial ancestor but has substantially diverged in the course of evolution. Here, we use single-particle cryo-electron microscopy (cryo-EM) as a screening tool to identify mitochondrial translation termination mechanisms and to describe them in molecular detail. We show how mitochondrial release factor 1a releases the nascent chain from the ribosome when it encounters the canonical stop codons UAA and UAG. Furthermore, we define how the peptidyl-tRNA hydrolase ICT1 acts as a rescue factor on mitoribosomes that have stalled on truncated messages to recover them for protein synthesis. Finally, we present structural models detailing the process of mitochondrial ribosome recycling to explain how a dedicated elongation factor, mitochondrial EFG2 (mtEFG2), has specialized for cooperation with the mitochondrial ribosome recycling factor to dissociate the mitoribosomal subunits at the end of the translation process. | |||||||||
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 | 7nsi.cif.gz | 3.9 MB | Display | PDBx/mmCIF format |
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PDB format | pdb7nsi.ent.gz | Display | PDB format | |
PDBx/mmJSON format | 7nsi.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Summary document | 7nsi_validation.pdf.gz | 2.4 MB | Display | wwPDB validaton report |
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Full document | 7nsi_full_validation.pdf.gz | 2.4 MB | Display | |
Data in XML | 7nsi_validation.xml.gz | 366.8 KB | Display | |
Data in CIF | 7nsi_validation.cif.gz | 607.1 KB | Display | |
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/ns/7nsi ftp://data.pdbj.org/pub/pdb/validation_reports/ns/7nsi | HTTPS FTP |
-Related structure data
Related structure data | 12568MC 7nqhC 7nqlC 7nshC 7nsjC 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
+39S ribosomal protein ... , 33 types, 33 molecules B0B1B3B6B7BIBJBKBNBPBQBRBSBTBUBVBWBXBYBaBbBgB8BhBjBkBlBmBnBo...
-Mitochondrial ribosomal protein ... , 17 types, 22 molecules B2B4BFBdBeBiBtBuBxAFAKAaAbAeAiAjCLDLELFLGLHL
#3: Protein | Mass: 30085.088 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: F1SGC7 |
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#5: Protein | Mass: 15156.537 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: I3L9J0 |
#12: Protein | Mass: 33251.469 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A287B2W3 |
#32: Protein | Mass: 24075.658 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A5G2R2V2 |
#33: Protein | Mass: 15073.404 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A287AWS0 |
#38: Protein | Mass: 35331.805 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: I3LGM5 |
#47: Protein | Mass: 12001.915 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A287BP93 |
#48: Protein | Mass: 23545.873 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A286ZJR2 |
#51: Protein | Mass: 22273.084 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A5G2R1G5 |
#60: Protein | Mass: 30365.266 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: I3LEJ9 |
#64: Protein | Mass: 20841.922 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A286ZJJ6 |
#73: Protein | Mass: 43234.645 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A287AQT5 |
#74: Protein | Mass: 21666.674 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A5G2RMZ2 |
#77: Protein | Mass: 51945.984 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A5G2R5D6 |
#81: Protein | Mass: 12544.650 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: F1S8G3 |
#82: Protein | Mass: 25843.818 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A287AVS9 |
#88: Protein | Mass: 21268.975 Da / Num. of mol.: 6 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A287ARV8 |
-Protein , 16 types, 16 molecules B5BDBEBGBOBcBfBpB9ALAQAcAgAmAnAo
#6: Protein | Mass: 21537.930 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: I3LTC4 |
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#10: Protein | Mass: 33270.934 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A287A143 |
#11: Protein | Mass: 43708.270 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A140UHW4 |
#13: Protein | Mass: 28689.992 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: MRRF / Production host: Escherichia coli (E. coli) / References: UniProt: Q96E11 |
#18: Protein | Mass: 15955.632 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A4X1V5Y7 |
#31: Protein | Mass: 38523.422 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A4X1UDR3 |
#34: Protein | Mass: 16680.178 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A287BQA1 |
#45: Protein | Mass: 12015.747 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) |
#53: Protein | Mass: 10841.016 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A4X1THS9 |
#65: Protein | Mass: 15257.107 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A0M3KL52 |
#69: Protein | Mass: 14452.014 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: F1RIU0 |
#75: Protein | Mass: 19954.186 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A0M3KL55 |
#79: Protein | Mass: 46966.062 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: I3LS10 |
#84: Protein | Mass: 13561.903 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: F1SU49 |
#85: Protein | Mass: 22843.941 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A287B3R8 |
#86: Protein | Mass: 76524.648 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: F1SVC4 |
-RNA chain , 5 types, 5 molecules BBAAAVAXBA
#8: RNA chain | Mass: 23402.018 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: GenBank: 45826169 |
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#52: RNA chain | Mass: 308989.062 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: GenBank: 11055671 |
#54: RNA chain | Mass: 21713.891 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) |
#55: RNA chain | Mass: 1485.872 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) |
#56: RNA chain | Mass: 504852.031 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: GenBank: 33320725 |
-28S ribosomal protein ... , 16 types, 16 molecules ABACAEAGAIAJANAOAPARAUAdAfAhAkAp
#57: Protein | Mass: 31731.604 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: F1S001 |
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#58: Protein | Mass: 18935.172 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A287ANU4 |
#59: Protein | Mass: 48213.074 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: F1SU66 |
#61: Protein | Mass: 28150.918 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A286ZJ25 |
#62: Protein | Mass: 45604.570 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: I3LU08 |
#63: Protein | Mass: 23105.678 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: F1RUU2 |
#66: Protein | Mass: 15120.739 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A0M3KL53 |
#67: Protein | Mass: 27411.428 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A4X1VVY1 |
#68: Protein | Mass: 15182.668 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A480JTD7 |
#70: Protein | Mass: 16211.086 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A0M3KL54 |
#71: Protein | Mass: 10682.506 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A286ZNB3 |
#76: Protein | Mass: 23637.900 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: F1S8A5 |
#78: Protein | Mass: 21014.912 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A0M3KL56 |
#80: Protein | Mass: 44091.996 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: A0A4X1SQW0 |
#83: Protein | Mass: 37104.809 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: F1SG95 |
#87: Protein | Mass: 29220.465 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: Q767K8 |
-Protein/peptide , 1 types, 1 molecules AZ
#72: Protein/peptide | Mass: 1549.902 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: unknown polypeptide modeled as poly-alanine / Source: (natural) Sus scrofa (pig) |
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-Non-polymers , 6 types, 341 molecules
#89: Chemical | ChemComp-MG / #90: Chemical | ChemComp-ZN / #91: Chemical | #92: Chemical | ChemComp-5GP / | #93: Chemical | ChemComp-GTP / | #94: 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 |
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Source (natural) |
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Source (recombinant) | Organism: Escherichia coli (E. coli) | ||||||||||||||||||||||||
Buffer solution | pH: 7.6 | ||||||||||||||||||||||||
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||
Vitrification | Cryogen name: ETHANE-PROPANE |
-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 FIELD |
Image recording | Electron dose: 40 e/Å2 / Detector mode: INTEGRATING / Film or detector model: FEI FALCON III (4k x 4k) |
-Processing
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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3D reconstruction | Resolution: 4.6 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 15545 / Symmetry type: POINT |