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Yorodumi- PDB-7qh6: Cryo-EM structure of the human mtLSU assembly intermediate upon M... -
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Basic information
| Entry | Database: PDB / ID: 7qh6 | ||||||
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| Title | Cryo-EM structure of the human mtLSU assembly intermediate upon MRM2 depletion - class 1 | ||||||
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Keywords | RIBOSOME / Mitochondria / Assembly / Methyltransferase / MRM2 / RNA modification | ||||||
| Function / homology | Function and homology informationnegative regulation of mitochondrial translation / mitochondrial large ribosomal subunit assembly / negative regulation of ribosome biogenesis / protein lipoylation / Complex I biogenesis / Mitochondrial Fatty Acid Beta-Oxidation / Protein lipoylation / positive regulation of mitochondrial translation / rRNA import into mitochondrion / Respiratory electron transport ...negative regulation of mitochondrial translation / mitochondrial large ribosomal subunit assembly / negative regulation of ribosome biogenesis / protein lipoylation / Complex I biogenesis / Mitochondrial Fatty Acid Beta-Oxidation / Protein lipoylation / positive regulation of mitochondrial translation / rRNA import into mitochondrion / Respiratory electron transport / mitochondrial translational termination / mitochondrial translational elongation / Mitochondrial translation elongation / Mitochondrial translation termination / translation release factor activity, codon nonspecific / Mitochondrial translation initiation / translation release factor activity / iron-sulfur cluster assembly complex / mitochondrial large ribosomal subunit / mitochondrial fission / peptidyl-tRNA hydrolase / mitochondrial [2Fe-2S] assembly complex / mitochondrial large ribosomal subunit binding / mitochondrial ribosome / mitochondrial small ribosomal subunit / Hydrolases; Acting on ester bonds; Endoribonucleases producing 5'-phosphomonoesters / peptidyl-tRNA hydrolase activity / mitochondrial translation / [2Fe-2S] cluster assembly / iron-sulfur cluster assembly / acyl binding / ribosomal large subunit binding / acyl carrier activity / mitochondrial respiratory chain complex I assembly / proton motive force-driven mitochondrial ATP synthesis / mitochondrial electron transport, NADH to ubiquinone / respiratory chain complex I / RNA processing / rescue of stalled cytosolic ribosome / Mitochondrial protein degradation / aerobic respiration / fatty acid binding / cellular response to leukemia inhibitory factor / ribosomal large subunit biogenesis / mitochondrial membrane / fibrillar center / fatty acid biosynthetic process / double-stranded RNA binding / 5S rRNA binding / small ribosomal subunit rRNA binding / endonuclease activity / negative regulation of translation / mitochondrial inner membrane / rRNA binding / nuclear body / structural constituent of ribosome / ribosome / translation / mitochondrial matrix / ribonucleoprotein complex / protein domain specific binding / nucleotide binding / mRNA binding / apoptotic process / calcium ion binding / structural molecule activity / mitochondrion / extracellular space / RNA binding / nucleoplasm / nucleus / plasma membrane / cytosol Similarity search - Function | ||||||
| Biological species | Homo sapiens (human) | ||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.08 Å | ||||||
Authors | Rebelo-Guiomar, P. / Pellegrino, S. / Dent, K.C. / Warren, A.J. / Minczuk, M. | ||||||
| Funding support | United Kingdom, 1items
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Citation | Journal: Nat Commun / Year: 2022Title: A late-stage assembly checkpoint of the human mitochondrial ribosome large subunit. Authors: Pedro Rebelo-Guiomar / Simone Pellegrino / Kyle C Dent / Aldema Sas-Chen / Leonor Miller-Fleming / Caterina Garone / Lindsey Van Haute / Jack F Rogan / Adam Dinan / Andrew E Firth / Byron ...Authors: Pedro Rebelo-Guiomar / Simone Pellegrino / Kyle C Dent / Aldema Sas-Chen / Leonor Miller-Fleming / Caterina Garone / Lindsey Van Haute / Jack F Rogan / Adam Dinan / Andrew E Firth / Byron Andrews / Alexander J Whitworth / Schraga Schwartz / Alan J Warren / Michal Minczuk / ![]() Abstract: Many cellular processes, including ribosome biogenesis, are regulated through post-transcriptional RNA modifications. Here, a genome-wide analysis of the human mitochondrial transcriptome shows that ...Many cellular processes, including ribosome biogenesis, are regulated through post-transcriptional RNA modifications. Here, a genome-wide analysis of the human mitochondrial transcriptome shows that 2'-O-methylation is limited to residues of the mitoribosomal large subunit (mtLSU) 16S mt-rRNA, introduced by MRM1, MRM2 and MRM3, with the modifications installed by the latter two proteins being interdependent. MRM2 controls mitochondrial respiration by regulating mitoribosome biogenesis. In its absence, mtLSU particles (visualized by cryo-EM at the resolution of 2.6 Å) present disordered RNA domains, partial occupancy of bL36m and bound MALSU1:L0R8F8:mtACP anti-association module, allowing five mtLSU biogenesis intermediates with different intersubunit interface configurations to be placed along the assembly pathway. However, mitoribosome biogenesis does not depend on the methyltransferase activity of MRM2. Disruption of the MRM2 Drosophila melanogaster orthologue leads to mitochondria-related developmental arrest. This work identifies a key checkpoint during mtLSU assembly, essential to maintain mitochondrial homeostasis. | ||||||
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Structure visualization
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| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 7qh6.cif.gz | 1.8 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb7qh6.ent.gz | 1.4 MB | Display | PDB format |
| PDBx/mmJSON format | 7qh6.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 7qh6_validation.pdf.gz | 1.2 MB | Display | wwPDB validaton report |
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| Full document | 7qh6_full_validation.pdf.gz | 1.2 MB | Display | |
| Data in XML | 7qh6_validation.xml.gz | 174.5 KB | Display | |
| Data in CIF | 7qh6_validation.cif.gz | 300.1 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/qh/7qh6 ftp://data.pdbj.org/pub/pdb/validation_reports/qh/7qh6 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 13965MC ![]() 7qh7C C: citing same article ( M: map data used to model this data |
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| Similar structure data |
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Assembly
| Deposited unit | ![]()
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Components
+39S ribosomal protein ... , 38 types, 38 molecules DEFHKLMNOPQRSTUVWXYZ01235679ab...
-Protein , 6 types, 6 molecules opquvw
| #37: 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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| #38: 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 |
| #39: Protein | Mass: 25426.895 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q8TAE8 |
| #42: Protein | Mass: 26203.076 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q96EH3 |
| #43: Protein | Mass: 8460.787 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: L0R8F8 |
| #44: Protein | Mass: 17434.273 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O14561 |
-RNA chain , 2 types, 2 molecules AB
| #45: 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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| #46: 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 , 1 types, 1 molecules 
| #47: 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: Human mitochondrial ribosome large subunit / Type: RIBOSOME / Entity ID: #1-#46 / Source: NATURAL |
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| Molecular weight | Experimental value: NO |
| Source (natural) | Organism: Homo sapiens (human) |
| Buffer solution | pH: 7.4 |
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
| Specimen support | Grid material: COPPER / Grid mesh size: 300 divisions/in. / 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: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: -2600 nm / Nominal defocus min: -1000 nm |
| Image recording | Electron dose: 52.5 e/Å2 / Detector mode: INTEGRATING / Film or detector model: FEI FALCON III (4k x 4k) |
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Processing
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||
| Particle selection | Num. of particles selected: 2709521 | ||||||||||||||||||||||||||||||||||||
| 3D reconstruction | Resolution: 3.08 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 119341 / Num. of class averages: 1 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||
| Atomic model building | Protocol: RIGID BODY FIT / Space: REAL | ||||||||||||||||||||||||||||||||||||
| Atomic model building | PDB-ID: 5OOL Accession code: 5OOL / Source name: PDB / Type: experimental model | ||||||||||||||||||||||||||||||||||||
| Refinement | Cross valid method: NONE Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||||||||||||||
| Displacement parameters | Biso mean: 49.07 Å2 | ||||||||||||||||||||||||||||||||||||
| Refine LS restraints |
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About Yorodumi



Homo sapiens (human)
United Kingdom, 1items
Citation

UCSF Chimera















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