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- EMDB-23114: Cryo-EM structure of the human 55S mitoribosome in complex with R... -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-23114 | |||||||||
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Title | Cryo-EM structure of the human 55S mitoribosome in complex with RRFmt and EF-G2mt | |||||||||
![]() | Cryo-EM structure of the human 55S mitoribosome in complex with RRFmt and EF-G2mt | |||||||||
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Function / homology | ![]() mitochondrial ribosome binding / mitochondrial transcription / mitochondrial ribosome assembly / mitochondrial translational elongation / mitochondrial translational termination / microprocessor complex / translation release factor activity, codon nonspecific / Mitochondrial translation elongation / Mitochondrial translation termination / positive regulation of mitochondrial translation ...mitochondrial ribosome binding / mitochondrial transcription / mitochondrial ribosome assembly / mitochondrial translational elongation / mitochondrial translational termination / microprocessor complex / translation release factor activity, codon nonspecific / Mitochondrial translation elongation / Mitochondrial translation termination / positive regulation of mitochondrial translation / Mitochondrial translation initiation / ribosome disassembly / negative regulation of mitotic nuclear division / mitochondrial large ribosomal subunit / Hydrolases; Acting on ester bonds; Endoribonucleases producing 5'-phosphomonoesters / peptidyl-tRNA hydrolase / mitochondrial small ribosomal subunit / aminoacyl-tRNA hydrolase activity / mitochondrial ribosome / mitochondrial translation / ribosomal large subunit binding / 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 / nuclear membrane / cytosolic small ribosomal subunit / endonuclease activity / 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 / nucleoplasm / nucleus / plasma membrane / cytoplasm / cytosol Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.49 Å | |||||||||
![]() | Agrawal E / Koripella R | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Distinct mechanisms of the human mitoribosome recycling and antibiotic resistance. Authors: Ravi Kiran Koripella / Ayush Deep / Ekansh K Agrawal / Pooja Keshavan / Nilesh K Banavali / Rajendra K Agrawal / ![]() Abstract: Ribosomes are recycled for a new round of translation initiation by dissociation of ribosomal subunits, messenger RNA and transfer RNA from their translational post-termination complex. Here we ...Ribosomes are recycled for a new round of translation initiation by dissociation of ribosomal subunits, messenger RNA and transfer RNA from their translational post-termination complex. Here we present cryo-EM structures of the human 55S mitochondrial ribosome (mitoribosome) and the mitoribosomal large 39S subunit in complex with mitoribosome recycling factor (RRF) and a recycling-specific homolog of elongation factor G (EF-G2). These structures clarify an unusual role of a mitochondria-specific segment of RRF, identify the structural distinctions that confer functional specificity to EF-G2, and show that the deacylated tRNA remains with the dissociated 39S subunit, suggesting a distinct sequence of events in mitoribosome recycling. Furthermore, biochemical and structural analyses reveal that the molecular mechanism of antibiotic fusidic acid resistance for EF-G2 is markedly different from that of mitochondrial elongation factor EF-G1, suggesting that the two human EF-Gs have evolved diversely to negate the effect of a bacterial antibiotic. | |||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 226.1 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 7.7 KB 7.7 KB | Display Display | ![]() |
Images | ![]() | 123.5 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 395.9 KB | Display | ![]() |
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Full document | ![]() | 395.5 KB | Display | |
Data in XML | ![]() | 7.4 KB | Display | |
Data in CIF | ![]() | 8.4 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7l08C ![]() 7l20C C: citing same article ( |
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Similar structure data | |
EM raw data | ![]() Data size: 2.3 TB Data #1: Aligned single-frame particles of human mitochondrial 55S-EF-Gmt complex [picked particles - single frame - processed]) |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | Cryo-EM structure of the human 55S mitoribosome in complex with RRFmt and EF-G2mt | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.07325 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : 55S Mitochondrial Ribosome, mtEFG2, mtRRF
Entire | Name: 55S Mitochondrial Ribosome, mtEFG2, mtRRF |
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Components |
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-Supramolecule #1: 55S Mitochondrial Ribosome, mtEFG2, mtRRF
Supramolecule | Name: 55S Mitochondrial Ribosome, mtEFG2, mtRRF / type: complex / ID: 1 / Parent: 0 / Details: 55S Mitochondrial Ribosome, mtEFG2, mtRRF |
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Source (natural) | Organism: ![]() |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.5 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: DIRECT ELECTRON DE-16 (4k x 4k) / Average electron dose: 70.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: OTHER |
Electron optics | Illumination mode: OTHER / Imaging mode: OTHER |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Startup model | Type of model: EMDB MAP EMDB ID: Details: Structural insights into unique features of the human mitochondrial ribosome recycling |
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Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.49 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 28929 |
Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |