positive regulation of translational termination / positive regulation of translational elongation / ribosomal subunit / negative regulation of glucose mediated signaling pathway / negative regulation of translational frameshifting / mTORC1-mediated signalling / Protein hydroxylation / ribosome-associated ubiquitin-dependent protein catabolic process / GDP-dissociation inhibitor activity / pre-mRNA 5'-splice site binding ...positive regulation of translational termination / positive regulation of translational elongation / ribosomal subunit / negative regulation of glucose mediated signaling pathway / negative regulation of translational frameshifting / mTORC1-mediated signalling / Protein hydroxylation / ribosome-associated ubiquitin-dependent protein catabolic process / GDP-dissociation inhibitor activity / pre-mRNA 5'-splice site binding / Formation of the ternary complex, and subsequently, the 43S complex / Translation initiation complex formation / Ribosomal scanning and start codon recognition / cleavage in ITS2 between 5.8S rRNA and LSU-rRNA of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / response to cycloheximide / mRNA destabilization / Major pathway of rRNA processing in the nucleolus and cytosol / SRP-dependent cotranslational protein targeting to membrane / GTP hydrolysis and joining of the 60S ribosomal subunit / Formation of a pool of free 40S subunits / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / negative regulation of mRNA splicing, via spliceosome / L13a-mediated translational silencing of Ceruloplasmin expression / preribosome, large subunit precursor / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / ribosomal large subunit export from nucleus / G-protein alpha-subunit binding / positive regulation of protein kinase activity / protein-RNA complex assembly / regulation of translational fidelity / translation regulator activity / translation elongation factor activity / ribosomal subunit export from nucleus / endonucleolytic cleavage in ITS1 to separate SSU-rRNA from 5.8S rRNA and LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / cellular response to amino acid starvation / rescue of stalled ribosome / maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / 90S preribosome / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of LSU-rRNA / ribosomal large subunit biogenesis / maturation of SSU-rRNA / small-subunit processome / positive regulation of apoptotic signaling pathway / protein kinase C binding / macroautophagy / maintenance of translational fidelity / ribosomal large subunit assembly / cytoplasmic stress granule / modification-dependent protein catabolic process / rRNA processing / protein tag activity / ribosome biogenesis / ribosome binding / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / 5S rRNA binding / large ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / cytosolic large ribosomal subunit / nucleic acid binding / cytoplasmic translation / rRNA binding / negative regulation of translation / ribosome / protein ubiquitination / structural constituent of ribosome / ribonucleoprotein complex / translation / positive regulation of protein phosphorylation / G protein-coupled receptor signaling pathway / negative regulation of gene expression / response to antibiotic / mRNA binding / ubiquitin protein ligase binding / nucleolus / mitochondrion / RNA binding / zinc ion binding / nucleoplasm / nucleus / metal ion binding / cytoplasm / cytosol Similarity search - Function
Hyaluronan / mRNA binding family / Translation elongation factor, IF5A, hypusine site / Eukaryotic initiation factor 5A hypusine signature. / Eukaryotic elongation factor 5A hypusine, DNA-binding OB fold / Translation elongation factor IF5A-like / Translation elongation factor, IF5A C-terminal / Eukaryotic elongation factor 5A hypusine, DNA-binding OB fold / Stm1-like, N-terminal / Stm1 / Hyaluronan/mRNA-binding protein ...Hyaluronan / mRNA binding family / Translation elongation factor, IF5A, hypusine site / Eukaryotic initiation factor 5A hypusine signature. / Eukaryotic elongation factor 5A hypusine, DNA-binding OB fold / Translation elongation factor IF5A-like / Translation elongation factor, IF5A C-terminal / Eukaryotic elongation factor 5A hypusine, DNA-binding OB fold / Stm1-like, N-terminal / Stm1 / Hyaluronan/mRNA-binding protein / Hyaluronan / mRNA binding family / : / Ribosomal protein S26e signature. / Ribosomal protein L41 / Ribosomal protein L41 / Ribosomal protein S26e / Ribosomal protein S26e superfamily / Ribosomal protein S26e / Ribosomal protein S21e, conserved site / Ribosomal protein S21e signature. / Ribosomal protein S5, eukaryotic/archaeal / Ribosomal protein S19e, conserved site / Ribosomal protein S19e signature. / Small (40S) ribosomal subunit Asc1/RACK1 / Ribosomal protein S2, eukaryotic / Ribosomal protein S21e / Ribosomal protein S21e superfamily / Ribosomal protein S21e / Ribosomal protein L29e / Ribosomal L29e protein family / 40S Ribosomal protein S10 / S27a-like superfamily / Ribosomal protein S10, eukaryotic/archaeal / Ribosomal protein L13e, conserved site / Ribosomal protein L13e signature. / Ribosomal protein L1, conserved site / Plectin/S10, N-terminal / Plectin/S10 domain / Ribosomal protein L22e / Ribosomal protein L22e superfamily / Ribosomal L22e protein family / Ribosomal protein S25 / S25 ribosomal protein / Ribosomal protein L1 signature. / Ribosomal protein L38e / Ribosomal protein L38e superfamily / Ribosomal L38e protein family / Ribosomal protein S2, eukaryotic/archaeal / : / Ribosomal protein S17e, conserved site / Ribosomal protein S17e signature. / Ribosomal protein S27a / Ribosomal protein S27a / Ribosomal protein S27a / Ribosomal protein S8e subdomain, eukaryotes / Ribosomal protein L1 / Ribosomal protein S30 / Ribosomal protein S30 / 40S ribosomal protein S29/30S ribosomal protein S14 type Z / Ribosomal protein L27e, conserved site / Ribosomal protein L27e signature. / Ribosomal protein S7e signature. / Ribosomal protein L44e signature. / Ribosomal protein L10e, conserved site / Ribosomal protein L10e signature. / Ribosomal protein S3, eukaryotic/archaeal / Ribosomal protein L10e / Ribosomal protein L13e / Ribosomal protein L13e / Ribosomal protein L19, eukaryotic / Ribosomal protein S19e / Ribosomal protein S3Ae, conserved site / Ribosomal protein S19e / Ribosomal protein S3Ae signature. / Ribosomal_S19e / Ribosomal protein S27e signature. / 60S ribosomal protein L18a/ L20, eukaryotes / Ribosomal protein S4e, N-terminal, conserved site / Ribosomal protein S4e signature. / 40S ribosomal protein S4, C-terminal domain / 40S ribosomal protein S4 C-terminus / Ribosomal protein S19A/S15e / Ribosomal protein S8e, conserved site / Ribosomal protein S8e signature. / Ribosomal protein L24e, conserved site / Ribosomal protein L24e signature. / Ribosomal protein L44e / Ribosomal protein L19/L19e conserved site / Ribosomal protein L44 / Ribosomal protein L19e signature. / Ribosomal protein L34e, conserved site / Ribosomal protein L34e signature. / Ribosomal protein L5 eukaryotic, C-terminal / Ribosomal L18 C-terminal region / Ribosomal protein S17e / Ribosomal protein S17e-like superfamily / Ribosomal S17 / 50S ribosomal protein L18Ae/60S ribosomal protein L20 and L18a / Ribosomal L40e family / Ribosomal protein L30e signature 1. Similarity search - Domain/homology
40S ribosomal protein S8 / ES17 / RPS5 isoform 1 / Small ribosomal subunit protein eS1 / RPS22A isoform 1 / RPS31 isoform 1 / RPL38 isoform 1 / RPL10 isoform 1 / RPS29A isoform 1 / RPS20 isoform 1 ...40S ribosomal protein S8 / ES17 / RPS5 isoform 1 / Small ribosomal subunit protein eS1 / RPS22A isoform 1 / RPS31 isoform 1 / RPL38 isoform 1 / RPL10 isoform 1 / RPS29A isoform 1 / RPS20 isoform 1 / RPS2 isoform 1 / 60S ribosomal protein L29 / RPL24A isoform 1 / RPL11B isoform 1 / 40S ribosomal protein S25 / 40S ribosomal protein S26 / RPL5 isoform 1 / RPL32 isoform 1 / 40S ribosomal protein S3 / RPL4A isoform 1 / Large ribosomal subunit protein uL3 / RPS15 isoform 1 / RPS28A isoform 1 / Ribosomal protein L15 / STM1 isoform 1 / RPL9A isoform 1 / Eukaryotic translation initiation factor 5A / Small ribosomal subunit protein uS4A / Large ribosomal subunit protein uL15 / Large ribosomal subunit protein uL23 / Large ribosomal subunit protein eL39 / Large ribosomal subunit protein uL30A / Large ribosomal subunit protein uL22A / Large ribosomal subunit protein uL24A / Large ribosomal subunit protein eL33A / Large ribosomal subunit protein eL36A / Large ribosomal subunit protein eL22A / Small ribosomal subunit protein uS15 / Small ribosomal subunit protein eS19A / Small ribosomal subunit protein eS21A / Large ribosomal subunit protein eL27A / Large ribosomal subunit protein eL31A / Ubiquitin-ribosomal protein eL40A fusion protein / Large ribosomal subunit protein eL20A / Large ribosomal subunit protein eL43A / Large ribosomal subunit protein eL42A / Small ribosomal subunit protein uS12A / Small ribosomal subunit protein eS24A / Small ribosomal subunit protein eS30A / Small ribosomal subunit protein eS4A / Small ribosomal subunit protein eS6A / Large ribosomal subunit protein uL14A / Large ribosomal subunit protein uL1A / Large ribosomal subunit protein uL2A / Small ribosomal subunit protein uS17A / Large ribosomal subunit protein eL18A / Small ribosomal subunit protein uS9A / Small ribosomal subunit protein uS13A / Large ribosomal subunit protein eL19A / Large ribosomal subunit protein uL29A / Small ribosomal subunit protein eS32B / Large ribosomal subunit protein eL30 / Large ribosomal subunit protein eL8A / Large ribosomal subunit protein uL13A / Small ribosomal subunit protein eS7A / Small ribosomal subunit protein uS2A / Small ribosomal subunit protein eS27A / Large ribosomal subunit protein eL14A / Small ribosomal subunit protein RACK1 / Small ribosomal subunit protein uS11B / Large ribosomal subunit protein eL37A / Large ribosomal subunit protein eL34A / Large ribosomal subunit protein eL21A / Small ribosomal subunit protein eS10A / Large ribosomal subunit protein eL13A Similarity search - Component
Biological species
Saccharomyces cerevisiae (brewer's yeast)
Method
single particle reconstruction / cryo EM / Resolution: 2.4 Å
Journal: Nucleic Acids Res / Year: 2024 Title: Evolving precision: rRNA expansion segment 7S modulates translation velocity and accuracy in eukaryal ribosomes. Authors: Robert Rauscher / Cristian Eggers / Lyudmila Dimitrova-Paternoga / Vaishnavi Shankar / Alessia Rosina / Marina Cristodero / Helge Paternoga / Daniel N Wilson / Sebastian A Leidel / Norbert Polacek / Abstract: Ribosome-enhanced translational miscoding of the genetic code causes protein dysfunction and loss of cellular fitness. During evolution, open reading frame length increased, necessitating mechanisms ...Ribosome-enhanced translational miscoding of the genetic code causes protein dysfunction and loss of cellular fitness. During evolution, open reading frame length increased, necessitating mechanisms for enhanced translation fidelity. Indeed, eukaryal ribosomes are more accurate than bacterial counterparts, despite their virtually identical, conserved active centers. During the evolution of eukaryotic organisms ribosome expansions at the rRNA and protein level occurred, which potentially increases the options for translation regulation and cotranslational events. Here we tested the hypothesis that ribosomal RNA expansions can modulate the core function of the ribosome, faithful protein synthesis. We demonstrate that a short expansion segment present in all eukaryotes' small subunit, ES7S, is crucial for accurate protein synthesis as its presence adjusts codon-specific velocities and guarantees high levels of cognate tRNA selection. Deletion of ES7S in yeast enhances mistranslation and causes protein destabilization and aggregation, dramatically reducing cellular fitness. Removal of ES7S did not alter ribosome architecture but altered the structural dynamics of inter-subunit bridges thus affecting A-tRNA selection. Exchanging the yeast ES7S sequence with the human ES7S increases accuracy whereas shortening causes the opposite effect. Our study demonstrates that ES7S provided eukaryal ribosomes with higher accuracy without perturbing the structurally conserved decoding center.
Model: Quantifoil / Material: COPPER / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY / Support film - Film thickness: 300 / Pretreatment - Type: GLOW DISCHARGE
Vitrification
Cryogen name: ETHANE-PROPANE
Details
80S peak from Sucrose gradient
-
Electron microscopy
Microscope
FEI TALOS ARCTICA
Image recording
Film or detector model: GATAN K2 QUANTUM (4k x 4k) / Detector mode: COUNTING / Average electron dose: 32.0 e/Å2
Electron beam
Acceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
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