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Yorodumi- PDB-9hcd: Mouse mitoribosome large subunit assembly intermediate (with uL16... -
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Open data
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Basic information
| Entry | Database: PDB / ID: 9hcd | ||||||||||||
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| Title | Mouse mitoribosome large subunit assembly intermediate (with uL16m) bound to MRM3-dimer, DDX28 and the MALSU-L0R8F8-mt-ACP complex, state A2 (SAMC knock-out) | ||||||||||||
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Keywords | RIBOSOME / mitochondria / large subunit / assembly intermediate | ||||||||||||
| Function / homology | Function and homology informationMitochondrial translation elongation / Mitochondrial translation termination / rRNA (guanosine-2'-O-)-methyltransferase activity / ribonucleoprotein granule / negative regulation of mitochondrial translation / mitochondrial large ribosomal subunit assembly / Protein lipoylation / Mitochondrial Fatty Acid Beta-Oxidation / Complex I biogenesis / positive regulation of mitochondrial translation ...Mitochondrial translation elongation / Mitochondrial translation termination / rRNA (guanosine-2'-O-)-methyltransferase activity / ribonucleoprotein granule / negative regulation of mitochondrial translation / mitochondrial large ribosomal subunit assembly / Protein lipoylation / Mitochondrial Fatty Acid Beta-Oxidation / Complex I biogenesis / positive regulation of mitochondrial translation / Respiratory electron transport / rRNA import into mitochondrion / mitochondrial translational termination / mitochondrial translational elongation / ribonuclease III activity / : / translation release factor activity, codon nonspecific / Mitochondrial protein degradation / iron-sulfur cluster assembly complex / mitochondrial large ribosomal subunit / mitochondrial fission / mitochondrial [2Fe-2S] assembly complex / mitochondrial large ribosomal subunit binding / peptidyl-tRNA hydrolase / 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 / mitochondrial respiratory chain complex I assembly / mitochondrial nucleoid / proton motive force-driven mitochondrial ATP synthesis / respiratory chain complex I / RNA processing / cytosolic ribosome / rescue of stalled ribosome / aerobic respiration / Transferases; Transferring one-carbon groups; Methyltransferases / cellular response to leukemia inhibitory factor / ribosomal large subunit biogenesis / fatty acid biosynthetic process / cell junction / double-stranded RNA binding / 5S rRNA binding / RNA helicase activity / mitochondrial inner membrane / rRNA binding / nuclear body / structural constituent of ribosome / RNA helicase / ribosome / translation / mitochondrial matrix / ribonucleoprotein complex / protein domain specific binding / nucleotide binding / apoptotic process / nucleolus / structural molecule activity / ATP hydrolysis activity / mitochondrion / RNA binding / nucleoplasm / ATP binding / metal ion binding / identical protein binding / nucleus / plasma membrane / cytosol Similarity search - Function | ||||||||||||
| Biological species | ![]() | ||||||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.63 Å | ||||||||||||
Authors | Singh, V. / Rorbach, J. / Freyer, C. / Amunts, A. / Wredenberg, A. | ||||||||||||
| Funding support | Sweden, Denmark, 3items
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Citation | Journal: Nat Commun / Year: 2025Title: The mitochondrial methylation potential gates mitoribosome assembly. Authors: Ruth I C Glasgow / Vivek Singh / Lucía Peña-Pérez / Alissa Wilhalm / Marco F Moedas / David Moore / Florian A Rosenberger / Xinping Li / Ilian Atanassov / Mira Saba / Miriam Cipullo / ...Authors: Ruth I C Glasgow / Vivek Singh / Lucía Peña-Pérez / Alissa Wilhalm / Marco F Moedas / David Moore / Florian A Rosenberger / Xinping Li / Ilian Atanassov / Mira Saba / Miriam Cipullo / Joanna Rorbach / Anna Wedell / Christoph Freyer / Alexey Amunts / Anna Wredenberg / ![]() Abstract: S-adenosylmethionine (SAM) is the principal methyl donor in cells and is essential for mitochondrial gene expression, influencing RNA modifications, translation, and ribosome biogenesis. Using direct ...S-adenosylmethionine (SAM) is the principal methyl donor in cells and is essential for mitochondrial gene expression, influencing RNA modifications, translation, and ribosome biogenesis. Using direct long-read RNA sequencing in mouse tissues and embryonic fibroblasts, we show that processing of the mitochondrial ribosomal gene cluster fails in the absence of mitochondrial SAM, leading to an accumulation of unprocessed precursors. Proteomic analysis of ribosome fractions revealed these precursors associated with processing and assembly factors, indicating stalled biogenesis. Structural analysis by cryo-electron microscopy demonstrated that SAM-dependent methylation is required for peptidyl transferase centre formation during mitoribosome assembly. Our findings identify a critical role for SAM in coordinating mitoribosomal RNA processing and large subunit maturation, linking cellular methylation potential to mitochondrial translation capacity. | ||||||||||||
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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 | 9hcd.cif.gz | 3.7 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb9hcd.ent.gz | Display | PDB format | |
| PDBx/mmJSON format | 9hcd.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 9hcd_validation.pdf.gz | 2 MB | Display | wwPDB validaton report |
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| Full document | 9hcd_full_validation.pdf.gz | 2.1 MB | Display | |
| Data in XML | 9hcd_validation.xml.gz | 227.2 KB | Display | |
| Data in CIF | 9hcd_validation.cif.gz | 366 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/hc/9hcd ftp://data.pdbj.org/pub/pdb/validation_reports/hc/9hcd | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 52045MC ![]() 9e9cC ![]() 9hccC ![]() 9hceC ![]() 9hcfC ![]() 9hcgC ![]() 9hchC 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
-RNA chain , 2 types, 2 molecules AB
| #1: RNA chain | Mass: 508601.906 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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| #2: RNA chain | Mass: 21862.076 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
+Large ribosomal subunit protein ... , 44 types, 44 molecules DEFHIJKLMNOPQRSTUVXYZ056789abc...
-Protein , 5 types, 6 molecules uvwxyz
| #47: Protein | Mass: 26055.053 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() | ||
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| #48: Protein | Mass: 8444.846 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() | ||
| #49: Protein | Mass: 17390.289 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() | ||
| #50: Protein | Mass: 46868.930 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() References: UniProt: Q5ND52, Transferases; Transferring one-carbon groups; Methyltransferases #51: Protein | | Mass: 59592.754 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Non-polymers , 2 types, 2 molecules 


| #52: Chemical | ChemComp-ZN / |
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| #53: Chemical | ChemComp-FES / |
-Details
| Has ligand of interest | N |
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| Has protein modification | N |
-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: Assembly intermediate of the mitoribosome large subunit Type: RIBOSOME / Entity ID: #24-#29, #1-#23, #30-#51 / Source: NATURAL |
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| 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: TFS KRIOS |
| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 400 nm |
| Image recording | Electron dose: 40 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
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Processing
| EM software | Name: PHENIX / Version: 1.19.2_4158: / Category: model refinement | ||||||||||||||||||||||||
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
| 3D reconstruction | Resolution: 4.63 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 8965 / Symmetry type: POINT | ||||||||||||||||||||||||
| Refine LS restraints |
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Sweden,
Denmark, 3items
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FIELD EMISSION GUN