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- PDB-6ydp: 55S mammalian mitochondrial ribosome with mtEFG1 and P site fMet-... -
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Basic information
Entry | Database: PDB / ID: 6ydp | ||||||||||||
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Title | 55S mammalian mitochondrial ribosome with mtEFG1 and P site fMet-tRNAMet (POST) | ||||||||||||
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![]() | TRANSLATION / Mitochondria / 55S ribosome / mtEFG1 / Elongation | ||||||||||||
Function / homology | ![]() Hormone ligand-binding receptors / gonadotropin-releasing hormone receptor binding / gonadotropin hormone-releasing hormone activity / G alpha (q) signalling events / Mitochondrial translation elongation / Mitochondrial translation termination / mitochondrial transcription / mitochondrial translational elongation / mitochondrial translational termination / ribonuclease III activity ...Hormone ligand-binding receptors / gonadotropin-releasing hormone receptor binding / gonadotropin hormone-releasing hormone activity / G alpha (q) signalling events / Mitochondrial translation elongation / Mitochondrial translation termination / mitochondrial transcription / mitochondrial translational elongation / mitochondrial translational termination / ribonuclease III activity / mitochondrial ribosome assembly / microprocessor complex / translation release factor activity, codon nonspecific / Mitochondrial translation elongation / Mitochondrial protein degradation / mitochondrial large ribosomal subunit / peptidyl-tRNA hydrolase / mitochondrial small ribosomal subunit / aminoacyl-tRNA hydrolase activity / mitochondrial ribosome / organelle membrane / mitochondrial translation / positive regulation of proteolysis / ribosomal small subunit binding / translation elongation factor activity / RNA processing / rescue of stalled ribosome / large ribosomal subunit / double-stranded RNA binding / cell junction / regulation of translation / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / nuclear membrane / cytosolic large ribosomal subunit / nuclear body / rRNA binding / negative regulation of translation / ribosome / structural constituent of ribosome / mitochondrial matrix / ribonucleoprotein complex / translation / protein domain specific binding / nucleotide binding / GTPase activity / mRNA binding / synapse / nucleolus / GTP binding / apoptotic process / positive regulation of DNA-templated transcription / mitochondrion / RNA binding / extracellular space / nucleoplasm / nucleus / plasma membrane / cytosol / cytoplasm Similarity search - Function | ||||||||||||
Biological species | ![]() ![]() ![]() | ||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3 Å | ||||||||||||
![]() | Kummer, E. / Ban, N. | ||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Structural insights into mammalian mitochondrial translation elongation catalyzed by mtEFG1. Authors: Eva Kummer / Nenad Ban / ![]() Abstract: Mitochondria are eukaryotic organelles of bacterial origin where respiration takes place to produce cellular chemical energy. These reactions are catalyzed by the respiratory chain complexes located ...Mitochondria are eukaryotic organelles of bacterial origin where respiration takes place to produce cellular chemical energy. These reactions are catalyzed by the respiratory chain complexes located in the inner mitochondrial membrane. Notably, key components of the respiratory chain complexes are encoded on the mitochondrial chromosome and their expression relies on a dedicated mitochondrial translation machinery. Defects in the mitochondrial gene expression machinery lead to a variety of diseases in humans mostly affecting tissues with high energy demand such as the nervous system, the heart, or the muscles. The mitochondrial translation system has substantially diverged from its bacterial ancestor, including alterations in the mitoribosomal architecture, multiple changes to the set of translation factors and striking reductions in otherwise conserved tRNA elements. Although a number of structures of mitochondrial ribosomes from different species have been determined, our mechanistic understanding of the mitochondrial translation cycle remains largely unexplored. Here, we present two cryo-EM reconstructions of human mitochondrial elongation factor G1 bound to the mammalian mitochondrial ribosome at two different steps of the tRNA translocation reaction during translation elongation. Our structures explain the mechanism of tRNA and mRNA translocation on the mitoribosome, the regulation of mtEFG1 activity by the ribosomal GTPase-associated center, and the basis of decreased susceptibility of mtEFG1 to the commonly used antibiotic fusidic acid. | ||||||||||||
History |
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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PDBx/mmCIF format | ![]() | 4.5 MB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 10778MC ![]() 6ydwC M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
+Mitochondrial ribosomal protein ... , 39 types, 45 molecules B0BUBVBaBbBcBeBgBiBjBmBnBtB1BxABACAEAGAJALANARAaAcAdAeB2AhAk...
+Protein , 37 types, 37 molecules BWBXBYBfBhBlBoBpBqBuBvAFAIAKAOAQAUAbAfAgAiAjAmAnAoB3B4B5B6B9...
-Uncharacterized ... , 2 types, 2 molecules BdBR
#10: Protein | Mass: 24075.658 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#85: Protein | Mass: 19268.178 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-39S ribosomal protein ... , 2 types, 2 molecules BkBw
#17: Protein | Mass: 29942.523 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#27: Protein | Mass: 49100.504 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-RNA chain , 4 types, 5 molecules AABAAVAXBB
#30: RNA chain | Mass: 5350865.000 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() #46: RNA chain | | Mass: 22664.498 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) ![]() #47: RNA chain | | Mass: 1892.173 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) ![]() #73: RNA chain | | Mass: 23402.018 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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-28S ribosomal protein ... , 2 types, 2 molecules APAp
#42: Protein | Mass: 15182.668 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#64: Protein | Mass: 29220.465 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-Protein/peptide , 1 types, 1 molecules AZ
#48: Protein/peptide | Mass: 1297.416 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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-Non-polymers , 8 types, 345 molecules ![](data/chem/img/MG.gif)
![](data/chem/img/ZN.gif)
![](data/chem/img/SPM.gif)
![](data/chem/img/FME.gif)
![](data/chem/img/GTP.gif)
![](data/chem/img/5GP.gif)
![](data/chem/img/GNP.gif)
![](data/chem/img/HOH.gif)
![](data/chem/img/ZN.gif)
![](data/chem/img/SPM.gif)
![](data/chem/img/FME.gif)
![](data/chem/img/GTP.gif)
![](data/chem/img/5GP.gif)
![](data/chem/img/GNP.gif)
![](data/chem/img/HOH.gif)
#88: Chemical | ChemComp-MG / #89: Chemical | ChemComp-ZN / #90: Chemical | #91: Chemical | ChemComp-FME / | #92: Chemical | ChemComp-GTP / | #93: Chemical | #94: Chemical | ChemComp-GNP / | #95: Water | ChemComp-HOH / | |
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-Details
Has ligand of interest | Y |
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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
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Molecular weight |
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Source (natural) |
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Source (recombinant) |
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Buffer solution | pH: 7.6 | ||||||||||||||||||||||||||||||
Specimen | Conc.: 0.017 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||||||||
Vitrification | Cryogen name: ETHANE-PROPANE |
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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: ![]() |
Electron lens | Mode: OTHER |
Image recording | Electron dose: 40 e/Å2 / Film or detector model: FEI FALCON III (4k x 4k) |
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Processing
EM software | Name: EPU / Version: 1.9.0.30REL / Category: image acquisition |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
Symmetry | Point symmetry: C1 (asymmetric) |
3D reconstruction | Resolution: 3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 97764 / Symmetry type: POINT |
Atomic model building | Protocol: RIGID BODY FIT / Space: REAL |