+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-16897 | ||||||||||||
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Title | 55S human mitochondrial ribosome with mtRF1 and P-site tRNA | ||||||||||||
Map data | 55S human mitochondrial ribosome with mtRF1 and P-site tRNA | ||||||||||||
Sample |
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Keywords | human mitochondrial ribosome / release factor mtRF1 / non-canonical stop codon / RIBOSOME | ||||||||||||
Function / homology | Function and homology information translation release factor activity / mitochondrial ribosome binding / rRNA import into mitochondrion / mitochondrial transcription / mitochondrial translational elongation / mitochondrial translational termination / mitochondrial ribosome assembly / translation release factor activity, codon nonspecific / microprocessor complex / translation release factor activity, codon specific ...translation release factor activity / mitochondrial ribosome binding / rRNA import into mitochondrion / mitochondrial transcription / mitochondrial translational elongation / mitochondrial translational termination / mitochondrial ribosome assembly / translation release factor activity, codon nonspecific / microprocessor complex / translation release factor activity, codon specific / Mitochondrial translation elongation / Mitochondrial translation termination / Mitochondrial translation initiation / positive regulation of mitochondrial translation / negative regulation of mitotic nuclear division / Hydrolases; Acting on ester bonds; Endoribonucleases producing 5'-phosphomonoesters / mitochondrial large ribosomal subunit / peptidyl-tRNA hydrolase / mitochondrial small ribosomal subunit / aminoacyl-tRNA hydrolase activity / mitochondrial ribosome / mitochondrial translation / positive regulation of proteolysis / ribosomal small subunit binding / anatomical structure morphogenesis / RNA processing / Mitochondrial protein degradation / rescue of stalled ribosome / cellular response to leukemia inhibitory factor / apoptotic signaling pathway / fibrillar center / double-stranded RNA binding / cell junction / regulation of translation / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / 5S rRNA binding / large ribosomal subunit rRNA binding / endonuclease activity / nuclear membrane / cytosolic small ribosomal subunit / cell population proliferation / cytosolic large ribosomal subunit / mitochondrial inner membrane / tRNA binding / 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 / intracellular membrane-bounded organelle / nucleotide binding / mRNA binding / apoptotic process / synapse / nucleolus / GTP binding / positive regulation of DNA-templated transcription / mitochondrion / RNA binding / extracellular space / nucleoplasm / nucleus / plasma membrane / cytoplasm / cytosol Similarity search - Function | ||||||||||||
Biological species | Homo sapiens (human) | ||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.1 Å | ||||||||||||
Authors | Saurer M / Leibundgut M / Scaiola A / Schoenhut T / Ban N | ||||||||||||
Funding support | Switzerland, European Union, 3 items
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Citation | Journal: Science / Year: 2023 Title: Molecular basis of translation termination at noncanonical stop codons in human mitochondria. Authors: Martin Saurer / Marc Leibundgut / Hima Priyanka Nadimpalli / Alain Scaiola / Tanja Schönhut / Richard G Lee / Stefan J Siira / Oliver Rackham / René Dreos / Tea Lenarčič / Eva Kummer / ...Authors: Martin Saurer / Marc Leibundgut / Hima Priyanka Nadimpalli / Alain Scaiola / Tanja Schönhut / Richard G Lee / Stefan J Siira / Oliver Rackham / René Dreos / Tea Lenarčič / Eva Kummer / David Gatfield / Aleksandra Filipovska / Nenad Ban / Abstract: The genetic code that specifies the identity of amino acids incorporated into proteins during protein synthesis is almost universally conserved. Mitochondrial genomes feature deviations from the ...The genetic code that specifies the identity of amino acids incorporated into proteins during protein synthesis is almost universally conserved. Mitochondrial genomes feature deviations from the standard genetic code, including the reassignment of two arginine codons to stop codons. The protein required for translation termination at these noncanonical stop codons to release the newly synthesized polypeptides is not currently known. In this study, we used gene editing and ribosomal profiling in combination with cryo-electron microscopy to establish that mitochondrial release factor 1 (mtRF1) detects noncanonical stop codons in human mitochondria by a previously unknown mechanism of codon recognition. We discovered that binding of mtRF1 to the decoding center of the ribosome stabilizes a highly unusual conformation in the messenger RNA in which the ribosomal RNA participates in specific recognition of the noncanonical stop codons. | ||||||||||||
History |
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-Structure visualization
Supplemental images |
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-Downloads & links
-EMDB archive
Map data | emd_16897.map.gz | 483.4 MB | EMDB map data format | |
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Header (meta data) | emd-16897-v30.xml emd-16897.xml | 120.9 KB 120.9 KB | Display Display | EMDB header |
FSC (resolution estimation) | emd_16897_fsc.xml | 17 KB | Display | FSC data file |
Images | emd_16897.png | 200.6 KB | ||
Filedesc metadata | emd-16897.cif.gz | 25.2 KB | ||
Others | emd_16897_half_map_1.map.gz emd_16897_half_map_2.map.gz | 475.6 MB 475.6 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-16897 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-16897 | HTTPS FTP |
-Validation report
Summary document | emd_16897_validation.pdf.gz | 1.3 MB | Display | EMDB validaton report |
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Full document | emd_16897_full_validation.pdf.gz | 1.3 MB | Display | |
Data in XML | emd_16897_validation.xml.gz | 26.9 KB | Display | |
Data in CIF | emd_16897_validation.cif.gz | 35.3 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-16897 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-16897 | HTTPS FTP |
-Related structure data
Related structure data | 8oirMC 8oinC 8oipC 8oiqC 8oisC 8oitC C: citing same article (ref.) M: atomic model generated by this map |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_16897.map.gz / Format: CCP4 / Size: 512 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||
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Annotation | 55S human mitochondrial ribosome with mtRF1 and P-site tRNA | ||||||||||||||||||||
Voxel size | X=Y=Z: 1.06 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Half map: half map B
File | emd_16897_half_map_1.map | ||||||||||||
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Annotation | half map B | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: half map A
File | emd_16897_half_map_2.map | ||||||||||||
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Annotation | half map A | ||||||||||||
Projections & Slices |
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Density Histograms |
-Sample components
+Entire : 55S human mitochondrial ribosome with mtRF1 and P-site tRNA
+Supramolecule #1: 55S human mitochondrial ribosome with mtRF1 and P-site tRNA
+Macromolecule #1: 39S ribosomal protein L12, mitochondrial
+Macromolecule #5: 39S ribosomal protein L22, mitochondrial
+Macromolecule #6: 39S ribosomal protein L23, mitochondrial
+Macromolecule #7: 39S ribosomal protein L24, mitochondrial
+Macromolecule #8: 39S ribosomal protein L27, mitochondrial
+Macromolecule #9: 39S ribosomal protein L28, mitochondrial
+Macromolecule #10: 39S ribosomal protein L47, mitochondrial
+Macromolecule #11: 39S ribosomal protein L30, mitochondrial
+Macromolecule #12: 39S ribosomal protein L32, mitochondrial
+Macromolecule #13: 39S ribosomal protein L33, mitochondrial
+Macromolecule #14: 39S ribosomal protein L34, mitochondrial
+Macromolecule #15: 39S ribosomal protein L35, mitochondrial
+Macromolecule #16: 39S ribosomal protein L2, mitochondrial
+Macromolecule #17: 39S ribosomal protein L3, mitochondrial
+Macromolecule #18: 39S ribosomal protein L4, mitochondrial
+Macromolecule #19: 39S ribosomal protein L9, mitochondrial
+Macromolecule #20: 39S ribosomal protein L10, mitochondrial
+Macromolecule #21: 39S ribosomal protein L11, mitochondrial
+Macromolecule #22: 39S ribosomal protein L13, mitochondrial
+Macromolecule #23: 39S ribosomal protein L14, mitochondrial
+Macromolecule #24: 39S ribosomal protein L15, mitochondrial
+Macromolecule #25: 39S ribosomal protein L16, mitochondrial
+Macromolecule #26: 39S ribosomal protein L17, mitochondrial
+Macromolecule #27: 39S ribosomal protein L18, mitochondrial
+Macromolecule #28: 39S ribosomal protein L19, mitochondrial
+Macromolecule #29: 39S ribosomal protein L20, mitochondrial
+Macromolecule #30: 39S ribosomal protein L21, mitochondrial
+Macromolecule #31: 39S ribosomal protein L52, mitochondrial
+Macromolecule #32: 39S ribosomal protein L53, mitochondrial
+Macromolecule #33: 39S ribosomal protein L54, mitochondrial
+Macromolecule #34: 39S ribosomal protein L55, mitochondrial
+Macromolecule #35: Ribosomal protein 63, mitochondrial
+Macromolecule #36: Peptidyl-tRNA hydrolase ICT1, mitochondrial
+Macromolecule #37: Growth arrest and DNA damage-inducible proteins-interacting protein 1
+Macromolecule #38: 39S ribosomal protein S18a, mitochondrial
+Macromolecule #39: 39S ribosomal protein S30, mitochondrial
+Macromolecule #40: 39S ribosomal protein L1, mitochondrial
+Macromolecule #41: 39S ribosomal protein L36, mitochondrial
+Macromolecule #42: 39S ribosomal protein L37, mitochondrial
+Macromolecule #43: 39S ribosomal protein L38, mitochondrial
+Macromolecule #44: 39S ribosomal protein L39, mitochondrial
+Macromolecule #45: 39S ribosomal protein L40, mitochondrial
+Macromolecule #46: 39S ribosomal protein L41, mitochondrial
+Macromolecule #47: 39S ribosomal protein L42, mitochondrial
+Macromolecule #48: Large ribosomal subunit protein mL43
+Macromolecule #49: 39S ribosomal protein L44, mitochondrial
+Macromolecule #50: 39S ribosomal protein L45, mitochondrial
+Macromolecule #51: 39S ribosomal protein L46, mitochondrial
+Macromolecule #52: 39S ribosomal protein L48, mitochondrial
+Macromolecule #53: 39S ribosomal protein L49, mitochondrial
+Macromolecule #54: 39S ribosomal protein L50, mitochondrial
+Macromolecule #55: 39S ribosomal protein L51, mitochondrial
+Macromolecule #57: 28S ribosomal protein S35, mitochondrial
+Macromolecule #58: 28S ribosomal protein S24, mitochondrial
+Macromolecule #59: Aurora kinase A-interacting protein
+Macromolecule #60: 28S ribosomal protein S6, mitochondrial
+Macromolecule #61: 28S ribosomal protein S7, mitochondrial
+Macromolecule #63: 28S ribosomal protein S10, mitochondrial
+Macromolecule #65: 28S ribosomal protein S12, mitochondrial
+Macromolecule #66: 28S ribosomal protein S14, mitochondrial
+Macromolecule #67: 28S ribosomal protein S15, mitochondrial
+Macromolecule #68: 28S ribosomal protein S16, mitochondrial
+Macromolecule #69: 28S ribosomal protein S17, mitochondrial
+Macromolecule #70: 28S ribosomal protein S18b, mitochondrial
+Macromolecule #71: 28S ribosomal protein S18c, mitochondrial
+Macromolecule #72: 28S ribosomal protein S21, mitochondrial
+Macromolecule #73: 28S ribosomal protein S22, mitochondrial
+Macromolecule #74: 28S ribosomal protein S23, mitochondrial
+Macromolecule #75: 28S ribosomal protein S25, mitochondrial
+Macromolecule #76: 28S ribosomal protein S26, mitochondrial
+Macromolecule #77: 28S ribosomal protein S27, mitochondrial
+Macromolecule #78: 28S ribosomal protein S28, mitochondrial
+Macromolecule #79: 28S ribosomal protein S29, mitochondrial
+Macromolecule #80: 28S ribosomal protein S31, mitochondrial
+Macromolecule #81: 28S ribosomal protein S33, mitochondrial
+Macromolecule #82: Peptide chain release factor 1, mitochondrial
+Macromolecule #83: 28S ribosomal protein S2, mitochondrial
+Macromolecule #84: Coiled-coil-helix-coiled-coil-helix domain-containing protein 1
+Macromolecule #85: 28S ribosomal protein S5, mitochondrial
+Macromolecule #86: Pentatricopeptide repeat domain-containing protein 3, mitochondrial
+Macromolecule #87: 28S ribosomal protein S9, mitochondrial
+Macromolecule #88: 28S ribosomal protein S11, mitochondrial
+Macromolecule #89: 28S ribosomal protein S34, mitochondrial
+Macromolecule #2: E-site tRNA
+Macromolecule #3: 16S rRNA
+Macromolecule #4: CP Val-tRNA(Val)
+Macromolecule #56: 12S rRNA
+Macromolecule #62: P-site Met-tRNA(Met)
+Macromolecule #64: mRNA
+Macromolecule #90: POTASSIUM ION
+Macromolecule #91: MAGNESIUM ION
+Macromolecule #92: VALINE
+Macromolecule #93: ZINC ION
+Macromolecule #94: FE-S-O HYBRID CLUSTER
+Macromolecule #95: METHIONINE
+Macromolecule #96: ADENOSINE-5'-TRIPHOSPHATE
+Macromolecule #97: GUANOSINE-5'-DIPHOSPHATE
+Macromolecule #98: water
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 7.5 Component:
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Grid | Model: Quantifoil R2/2 / Material: COPPER / Support film - #0 - Film type ID: 1 / Support film - #0 - Material: CARBON / Support film - #0 - topology: HOLEY / Support film - #1 - Film type ID: 2 / Support film - #1 - Material: CARBON / Support film - #1 - topology: CONTINUOUS / Pretreatment - Type: GLOW DISCHARGE | |||||||||||||||
Vitrification | Cryogen name: ETHANE-PROPANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV | |||||||||||||||
Details | Affinity-purified 55S mitoribosome. |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Specialist optics | Energy filter - Slit width: 20 eV |
Image recording | Film or detector model: GATAN K3 (6k x 4k) / Number grids imaged: 2 / Number real images: 43882 / Average electron dose: 60.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | C2 aperture diameter: 100.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 3.0 µm / Nominal defocus min: 0.6 µm / Nominal magnification: 81000 |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
+Image processing
-Atomic model buiding 1
Initial model |
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Refinement | Space: REAL / Protocol: FLEXIBLE FIT | |||||||||
Output model | PDB-8oir: |