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Open data
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Basic information
| Entry | Database: PDB / ID: 8qu5 | ||||||
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| Title | mt-LSU assembly intermediate in GTPBP8 knock-out cells, state 2 | ||||||
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Keywords | RIBOSOME / Mitochondria / Assembly / GTPBP8 | ||||||
| Function / homology | Function and homology informationnegative regulation of mitochondrial translation / negative regulation of ribosome biogenesis / Mitochondrial Fatty Acid Beta-Oxidation / Protein lipoylation / Complex I biogenesis / positive regulation of mitochondrial translation / Respiratory electron transport / mitochondrial large ribosomal subunit assembly / rRNA import into mitochondrion / rescue of stalled mitochondrial ribosome ...negative regulation of mitochondrial translation / negative regulation of ribosome biogenesis / Mitochondrial Fatty Acid Beta-Oxidation / Protein lipoylation / Complex I biogenesis / positive regulation of mitochondrial translation / Respiratory electron transport / mitochondrial large ribosomal subunit assembly / rRNA import into mitochondrion / rescue of stalled mitochondrial ribosome / mitochondrial translational termination / mitochondrial translational elongation / translation release factor activity, codon nonspecific / iron-sulfur cluster assembly complex / Mitochondrial translation elongation / Mitochondrial translation initiation / protein lipoylation / Mitochondrial ribosome-associated quality control / mitochondrial fission / Mitochondrial translation termination / peptidyl-tRNA hydrolase / mitochondrial large ribosomal subunit / mitochondrial [2Fe-2S] assembly complex / mitochondrial large ribosomal subunit binding / mitochondrial ribosome / mitochondrial small ribosomal subunit / peptidyl-tRNA hydrolase activity / [2Fe-2S] cluster assembly / mitochondrial translation / iron-sulfur cluster assembly / ribosomal large subunit binding / mitochondrial electron transport, NADH to ubiquinone / proton motive force-driven mitochondrial ATP synthesis / acyl binding / mitochondrial respiratory chain complex I assembly / respiratory chain complex I / anatomical structure morphogenesis / acyl carrier activity / RNA processing / Mitochondrial protein degradation / fatty acid binding / aerobic respiration / ribosomal large subunit biogenesis / mitochondrial membrane / fatty acid biosynthetic process / regulation of translation / double-stranded RNA binding / 5S rRNA binding / small ribosomal subunit rRNA binding / large ribosomal subunit rRNA binding / mitochondrial inner membrane / negative regulation of translation / rRNA binding / structural constituent of ribosome / ribosome / translation / mitochondrial matrix / ribonucleoprotein complex / protein domain specific binding / nucleotide binding / mRNA binding / calcium ion binding / apoptotic process / structural molecule activity / mitochondrion / : / RNA binding / nucleoplasm / nucleus / cytosol Similarity search - Function | ||||||
| Biological species | Homo sapiens (human) | ||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.42 Å | ||||||
Authors | Valentin Gese, G. / Cipullo, M. / Rorbach, J. / Hallberg, B.M. | ||||||
| Funding support | 1items
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Citation | Journal: Nat Commun / Year: 2024Title: GTPBP8 plays a role in mitoribosome formation in human mitochondria. Authors: Miriam Cipullo / Genís Valentín Gesé / Shreekara Gopalakrishna / Annika Krueger / Vivian Lobo / Maria A Pirozhkova / James Marks / Petra Páleníková / Dmitrii Shiriaev / Yong Liu / ...Authors: Miriam Cipullo / Genís Valentín Gesé / Shreekara Gopalakrishna / Annika Krueger / Vivian Lobo / Maria A Pirozhkova / James Marks / Petra Páleníková / Dmitrii Shiriaev / Yong Liu / Jelena Misic / Yu Cai / Minh Duc Nguyen / Abubakar Abdelbagi / Xinping Li / Michal Minczuk / Markus Hafner / Daniel Benhalevy / Aishe A Sarshad / Ilian Atanassov / B Martin Hällberg / Joanna Rorbach / ![]() Abstract: Mitochondrial gene expression relies on mitoribosomes to translate mitochondrial mRNAs. The biogenesis of mitoribosomes is an intricate process involving multiple assembly factors. Among these ...Mitochondrial gene expression relies on mitoribosomes to translate mitochondrial mRNAs. The biogenesis of mitoribosomes is an intricate process involving multiple assembly factors. Among these factors, GTP-binding proteins (GTPBPs) play important roles. In bacterial systems, numerous GTPBPs are required for ribosome subunit maturation, with EngB being a GTPBP involved in the ribosomal large subunit assembly. In this study, we focus on exploring the function of GTPBP8, the human homolog of EngB. We find that ablation of GTPBP8 leads to the inhibition of mitochondrial translation, resulting in significant impairment of oxidative phosphorylation. Structural analysis of mitoribosomes from GTPBP8 knock-out cells shows the accumulation of mitoribosomal large subunit assembly intermediates that are incapable of forming functional monosomes. Furthermore, fPAR-CLIP analysis reveals that GTPBP8 is an RNA-binding protein that interacts specifically with the mitochondrial ribosome large subunit 16 S rRNA. Our study highlights the role of GTPBP8 as a component of the mitochondrial gene expression machinery involved in mitochondrial large subunit maturation. | ||||||
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Structure visualization
| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 8qu5.cif.gz | 2.3 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb8qu5.ent.gz | 1.8 MB | Display | PDB format |
| PDBx/mmJSON format | 8qu5.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/qu/8qu5 ftp://data.pdbj.org/pub/pdb/validation_reports/qu/8qu5 | HTTPS FTP |
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-Related structure data
| Related structure data | ![]() 18461MC ![]() 8qrkC ![]() 8qrlC ![]() 8qrmC ![]() 8qrnC ![]() 8qu1C M: map data used to model this data C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
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Assembly
| Deposited unit | ![]()
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Components
+39S ribosomal protein ... , 46 types, 46 molecules 012378FHJKLMNOPQRSWXYZbgijlm56...
-Protein , 6 types, 6 molecules oquvwp
| #29: Protein | Mass: 12292.333 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9BQC6 |
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| #30: Protein | Mass: 25426.895 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q8TAE8 |
| #32: Protein | Mass: 26203.076 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q96EH3 |
| #33: Protein | Mass: 8460.787 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: L0R8F8 |
| #34: Protein | Mass: 17434.273 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O14561 |
| #53: Protein | Mass: 23674.203 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q14197, peptidyl-tRNA hydrolase |
-Protein/peptide , 1 types, 1 molecules t
| #31: Protein/peptide | Mass: 2400.951 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) |
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-RNA chain , 2 types, 2 molecules AB
| #38: RNA chain | Mass: 500019.594 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: GenBank: 1025814679 |
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| #39: RNA chain | Mass: 22022.131 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: GenBank: 1485738021 |
-Non-polymers , 3 types, 51 molecules 




| #56: Chemical | | #57: Chemical | ChemComp-MG / #58: Chemical | ChemComp-PNS / | |
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-Details
| Has ligand of interest | N |
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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: mtLSU assembly intermediate (State 2) / Type: ORGANELLE OR CELLULAR COMPONENT / Entity ID: #1-#55 / Source: NATURAL |
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| Source (natural) | Organism: Homo sapiens (human) |
| Buffer solution | pH: 7.5 |
| Specimen | Embedding applied: YES / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
| EM embedding | Material: Ice |
| 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: TFS KRIOS |
| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: SPOT SCAN |
| Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 3000 nm / Nominal defocus min: 200 nm |
| Image recording | Electron dose: 48 e/Å2 / Detector mode: INTEGRATING / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) |
| Image scans | Movie frames/image: 25 / Used frames/image: 1-25 |
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Processing
| EM software | Name: EPU / Category: image acquisition | ||||||||||||||||||||||||
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
| Particle selection | Num. of particles selected: 404181 | ||||||||||||||||||||||||
| 3D reconstruction | Resolution: 2.42 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 76796 / Symmetry type: POINT | ||||||||||||||||||||||||
| Refine LS restraints |
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Homo sapiens (human)
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