Ribosome-releasing factor 2, mitochondrial / Ribosome recycling factor / Ribosome recycling factor domain / RRF superfamily / Ribosome recycling factor / Elongation factor G, domain III / EFG, domain V / : / : / Ribosomal protein L37, mitochondrial ...Ribosome-releasing factor 2, mitochondrial / Ribosome recycling factor / Ribosome recycling factor domain / RRF superfamily / Ribosome recycling factor / Elongation factor G, domain III / EFG, domain V / : / : / Ribosomal protein L37, mitochondrial / Ribosomal protein L55, mitochondrial / Mitochondrial ribosomal protein L48 / 39S ribosomal protein L40, mitochondrial / Mitochondrial ribosomal protein L55 superfamily / Mitochondrial ribosomal protein L37 / Mitochondrial ribosomal protein L55 / Mitochondrial ribosomal protein L46 NUDIX / Ribosomal protein S30, mitochondrial / Ribosomal protein L53, mitochondrial / 39S ribosomal protein L53/MRP-L53 / 39S ribosomal protein L42, mitochondrial / Mitochondrial 28S ribosomal protein S32 / Ribosomal protein L28/L40, mitochondrial / Mitochondrial ribosomal protein L28 / Ribosomal protein 63, mitochondrial / Growth arrest/ DNA-damage-inducible protein-interacting protein 1 / Ribosomal protein L51, mitochondrial / Growth arrest and DNA-damage-inducible proteins-interacting protein 1 / Mitochondrial ribosomal subunit / Mitochondrial ribosome protein 63 / Ribosomal protein L37/S30 / Growth arrest and DNA damage-inducible proteins-interacting protein 1 domain superfamily / : / : / Mitochondrial 28S ribosomal protein S30 (PDCD9) / 39S ribosomal protein L52, mitochondrial / : / Mitoribosomal protein mL52 / Ribosomal protein L35, mitochondrial / MRPL44, double-stranded RNA binding domain / : / Tim44-like domain / Tim44-like domain / Tim44 / Ribosomal protein L7/L12, oligomerisation / Ribosomal protein L7/L12, oligomerisation domain superfamily / Ribosomal protein L7/L12 dimerisation domain / : / Ribosomal protein L7/L12 / Ribosomal protein L7/L12, C-terminal / Ribosomal protein L7/L12 C-terminal domain / Ribosomal protein L49/IMG2 / Mitochondrial large subunit ribosomal protein (Img2) / Ribosomal protein L46, N-terminal / 39S mitochondrial ribosomal protein L46 / Ribosomal protein L50, mitochondria / Ribosomal protein L27/L41, mitochondrial / : / Mitochondrial ribosomal protein L27 / Ribosomal subunit 39S / 39S ribosomal protein L46, mitochondrial / 39S ribosomal protein L43/54S ribosomal protein L51 / Ribosomal protein L47, mitochondrial / MRP-L47 superfamily, mitochondrial / Mitochondrial 39-S ribosomal protein L47 (MRP-L47) / Phosphatidylethanolamine-binding protein / Phosphatidylethanolamine-binding protein / Phosphatidylethanolamine-binding protein, eukaryotic / PEBP-like superfamily / Ribosomal protein L7/L12, C-terminal/adaptor protein ClpS-like / Threonyl/alanyl tRNA synthetase, class II-like, putative editing domain superfamily / TGS domain profile. / TGS / TGS-like / Peptide chain release factor class I / RF-1 domain / Ribonuclease III, endonuclease domain superfamily / Elongation Factor G, domain II / Elongation Factor G, domain III / Double stranded RNA-binding domain (dsRBD) profile. / Double-stranded RNA-binding domain / Translation elongation factor EFG/EF2, domain IV / Elongation factor G, domain IV / Elongation factor G, domain IV / Elongation factor G C-terminus / Elongation factor EFG, domain V-like / Elongation factor G C-terminus / EF-G domain III/V-like / Tr-type G domain, conserved site / Translational (tr)-type guanine nucleotide-binding (G) domain signature. / : / Ribosomal protein/NADH dehydrogenase domain / Mitochondrial ribosomal protein L51 / S25 / CI-B8 domain / Mitochondrial ribosomal protein L51 / S25 / CI-B8 domain / Beta-grasp domain superfamily / NTF2-like domain superfamily / Translation elongation factor EFTu-like, domain 2 / NUDIX hydrolase-like domain superfamily / Elongation factor Tu domain 2 / Translational (tr)-type GTP-binding domain Similarity search - Domain/homology
Large ribosomal subunit protein mL49 / Large ribosomal subunit protein uL3m / Large ribosomal subunit protein mL62 / Mitochondrial ribosomal protein L18 / Large ribosomal subunit protein bL28m / 39S ribosomal protein L20, mitochondrial isoform 1 / Large ribosomal subunit protein bL33m / Large ribosomal subunit protein mL64 / 39S ribosomal protein L23, mitochondrial / Large ribosomal subunit protein bL34m ...Large ribosomal subunit protein mL49 / Large ribosomal subunit protein uL3m / Large ribosomal subunit protein mL62 / Mitochondrial ribosomal protein L18 / Large ribosomal subunit protein bL28m / 39S ribosomal protein L20, mitochondrial isoform 1 / Large ribosomal subunit protein bL33m / Large ribosomal subunit protein mL64 / 39S ribosomal protein L23, mitochondrial / Large ribosomal subunit protein bL34m / Ribosomal protein / Mitochondrial ribosomal protein L12 / Mitochondrial ribosomal protein L41 / Large ribosomal subunit protein uL4m / Large ribosomal subunit protein mL51 / Large ribosomal subunit protein mL37 / Large ribosomal subunit protein uL14m / Mitochondrial ribosomal protein L57 / Large ribosomal subunit protein mL42 / Large ribosomal subunit protein mL53 / 39S ribosomal protein L48, mitochondrial / 39S ribosomal protein S30, mitochondrial / Large ribosomal subunit protein mL40 / Large ribosomal subunit protein uL24m / Large ribosomal subunit protein uL16m / Large ribosomal subunit protein bL17m / Large ribosomal subunit protein uL22m / Mitochondrial ribosomal protein S18A / Mitochondrial ribosomal protein L2 / 39S ribosomal protein L15, mitochondrial / 39S ribosomal protein L27, mitochondrial / Large ribosomal subunit protein uL11m / Large ribosomal subunit protein mL38 / Large ribosomal subunit protein uL10m / Large ribosomal subunit protein bL21m / Large ribosomal subunit protein mL43 / Large ribosomal subunit protein mL52 / Large ribosomal subunit protein uL29m / Mitochondrial ribosomal protein L39 / Large ribosomal subunit protein mL44 / Large ribosomal subunit protein mL46 / Large ribosomal subunit protein uL30m / Large ribosomal subunit protein bL35m / Large ribosomal subunit protein mL50 / Mitochondrial ribosomal protein L55 / Large ribosomal subunit protein mL45 / Large ribosomal subunit protein mL54 / Large ribosomal subunit protein bL19m / Large ribosomal subunit protein bL9m / Large ribosomal subunit protein bL32m / 39S ribosomal protein L13, mitochondrial / Ribosome-releasing factor 2, mitochondrial / Ribosome-recycling factor, mitochondrial Similarity search - Component
Biological species
Homo sapiens (human) / Sus scrofa (pig)
Method
single particle reconstruction / cryo EM / Resolution: 3.2 Å
Journal: Mol Cell / Year: 2021 Title: Structural basis of translation termination, rescue, and recycling in mammalian mitochondria. Authors: Eva Kummer / Katharina Noel Schubert / Tanja Schoenhut / Alain Scaiola / Nenad Ban / Abstract: The mitochondrial translation system originates from a bacterial ancestor but has substantially diverged in the course of evolution. Here, we use single-particle cryo-electron microscopy (cryo-EM) as ...The mitochondrial translation system originates from a bacterial ancestor but has substantially diverged in the course of evolution. Here, we use single-particle cryo-electron microscopy (cryo-EM) as a screening tool to identify mitochondrial translation termination mechanisms and to describe them in molecular detail. We show how mitochondrial release factor 1a releases the nascent chain from the ribosome when it encounters the canonical stop codons UAA and UAG. Furthermore, we define how the peptidyl-tRNA hydrolase ICT1 acts as a rescue factor on mitoribosomes that have stalled on truncated messages to recover them for protein synthesis. Finally, we present structural models detailing the process of mitochondrial ribosome recycling to explain how a dedicated elongation factor, mitochondrial EFG2 (mtEFG2), has specialized for cooperation with the mitochondrial ribosome recycling factor to dissociate the mitoribosomal subunits at the end of the translation process.
History
Deposition
Mar 7, 2021
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Header (metadata) release
May 5, 2021
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Map release
May 5, 2021
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Update
Jul 10, 2024
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Current status
Jul 10, 2024
Processing site: PDBe / Status: Released
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Structure visualization
Movie
Surface view with section colored by density value
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