- EMDB-50188: Gcn2 dimer bound to the 60S ribosomal subunit -
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Basic information
Entry
Database: EMDB / ID: EMD-50188
Title
Gcn2 dimer bound to the 60S ribosomal subunit
Map data
RELION PostProcess output, main map
Sample
Complex: 60S ribosomal subunit with bound Gcn2 dimer
Protein or peptide: x 42 types
RNA: x 3 types
Ligand: x 1 types
Keywords
LSU / 60S / Gcn2 / RIBOSOME
Function / homology
Function and homology information
cellular response to histidine / regulation of cytoplasmic translational initiation in response to stress / positive regulation of translational initiation in response to starvation / GCN2-mediated signaling / eukaryotic translation initiation factor 2alpha kinase activity / negative regulation of translational initiation in response to stress / positive regulation of cellular response to amino acid starvation / regulation of translational initiation / regulation of polysaccharide biosynthetic process / transporter complex ...cellular response to histidine / regulation of cytoplasmic translational initiation in response to stress / positive regulation of translational initiation in response to starvation / GCN2-mediated signaling / eukaryotic translation initiation factor 2alpha kinase activity / negative regulation of translational initiation in response to stress / positive regulation of cellular response to amino acid starvation / regulation of translational initiation / regulation of polysaccharide biosynthetic process / transporter complex / cleavage in ITS2 between 5.8S rRNA and LSU-rRNA of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / response to cycloheximide / protein kinase inhibitor activity / lipopolysaccharide transport / SRP-dependent cotranslational protein targeting to membrane / GTP hydrolysis and joining of the 60S ribosomal subunit / ribosomal large subunit binding / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / Formation of a pool of free 40S subunits / preribosome, large subunit precursor / L13a-mediated translational silencing of Ceruloplasmin expression / Gram-negative-bacterium-type cell outer membrane assembly / translational elongation / ribosomal large subunit export from nucleus / regulation of translational fidelity / protein-RNA complex assembly / translational termination / maturation of LSU-rRNA / translation initiation factor binding / cytosolic ribosome / cellular response to amino acid starvation / DNA damage checkpoint signaling / maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / ribosomal large subunit biogenesis / macroautophagy / translational initiation / modification-dependent protein catabolic process / protein tag activity / maintenance of translational fidelity / cell outer membrane / rRNA processing / ribosome biogenesis / large ribosomal subunit / double-stranded RNA binding / ribosome binding / protein autophosphorylation / small ribosomal subunit / 5S rRNA binding / ribosomal large subunit assembly / large ribosomal subunit rRNA binding / cytosolic large ribosomal subunit / cytoplasmic translation / tRNA binding / protein phosphorylation / non-specific serine/threonine protein kinase / protein ubiquitination / protein kinase activity / negative regulation of translation / rRNA binding / intracellular signal transduction / structural constituent of ribosome / ribosome / translation / response to antibiotic / protein serine kinase activity / mRNA binding / ubiquitin protein ligase binding / nucleolus / protein homodimerization activity / RNA binding / zinc ion binding / ATP binding / nucleus / cytosol / cytoplasm Similarity search - Function
eIF-2-alpha kinase Gcn2 / Histidyl tRNA synthetase-related domain / Anticodon binding domain of tRNAs / RWD domain / RWD domain profile. / RWD / RWD domain / Class II Histidinyl-tRNA synthetase (HisRS)-like catalytic core domain / Histidyl-tRNA synthetase / : ...eIF-2-alpha kinase Gcn2 / Histidyl tRNA synthetase-related domain / Anticodon binding domain of tRNAs / RWD domain / RWD domain profile. / RWD / RWD domain / Class II Histidinyl-tRNA synthetase (HisRS)-like catalytic core domain / Histidyl-tRNA synthetase / : / Anticodon-binding domain superfamily / LptD, C-terminal / LPS-assembly protein LptD / : / LPS transport system D / Organic solvent tolerance-like, N-terminal / LptA/(LptD N-terminal domain) LPS transport protein / Group II dsDNA virus coat/capsid protein / : / Ubiquitin-conjugating enzyme/RWD-like / Ribosomal protein L41 / Ribosomal protein L41 / Class II Aminoacyl-tRNA synthetase/Biotinyl protein ligase (BPL) and lipoyl protein ligase (LPL) / Ribosomal protein L29e / Ribosomal L29e protein family / Ribosomal protein L22e / Ribosomal protein L22e superfamily / Ribosomal L22e protein family / Ribosomal protein L27e, conserved site / Ribosomal protein L27e signature. / Ribosomal protein L10e, conserved site / Ribosomal protein L10e signature. / Ribosomal protein L38e / Ribosomal protein L38e superfamily / Ribosomal L38e protein family / Ribosomal protein L10e / Ribosomal protein L44e signature. / Ribosomal protein L24e, conserved site / Ribosomal protein L24e signature. / Ribosomal protein L19/L19e conserved site / Ribosomal protein L19, eukaryotic / Ribosomal protein L19e signature. / : / 60S ribosomal protein L18a/ L20, eukaryotes / Ribosomal protein L6e signature. / : / Ribosomal protein L44e / Ribosomal protein L44 / Ribosomal protein L34e, conserved site / Ribosomal protein L34e signature. / Ribosomal protein L5 eukaryotic, C-terminal / 50S ribosomal protein L18Ae/60S ribosomal protein L20 and L18a / Ribosomal L18 C-terminal region / Ribosomal L40e family / Ribosomal protein 50S-L18Ae/60S-L20/60S-L18A / Ribosomal proteins 50S-L18Ae/60S-L20/60S-L18A / Ribosomal protein 60S L18 and 50S L18e / Ribosomal_L40e / Ribosomal protein L40e / Ribosomal protein L40e superfamily / Ribosomal protein L18/L18-A/B/e, conserved site / Ribosomal protein L18e signature. / Ribosomal protein L23/L25, N-terminal / : / Ribosomal protein L23, N-terminal domain / Eukaryotic Ribosomal Protein L27, KOW domain / Ribosomal Protein L6, KOW domain / Ribosomal protein L36e signature. / Ribosomal protein L35Ae, conserved site / Ribosomal protein L35Ae signature. / Ribosomal protein L27e / Ribosomal protein L27e superfamily / Ribosomal L27e protein family / Ribosomal protein L39e, conserved site / Ribosomal protein L39e signature. / 60S ribosomal protein L19 / : / Ribosomal protein L13, eukaryotic/archaeal / Ribosomal protein L6e / Ribosomal protein L34Ae / Ribosomal protein L34e / Ribosomal protein L7A/L8 / 60S ribosomal protein L6E / 60S ribosomal protein L35 / Ribosomal protein L18e / Ribosomal protein L19e, C-terminal domain / Ribosomal_L19e / 60S ribosomal protein L4, C-terminal domain / 60S ribosomal protein L4 C-terminal domain / Ribosomal protein L19/L19e / Ribosomal protein L7, eukaryotic / Ribosomal protein L19/L19e, domain 1 / Ribosomal protein L31e, conserved site / Ribosomal protein L19/L19e superfamily / Ribosomal protein L19e, N-terminal domain / Ribosomal protein L31e signature. / Ribosomal protein L30, N-terminal / Ribosomal L30 N-terminal domain / Ribosomal protein L37ae / Ribosomal L37ae protein family Similarity search - Domain/homology
Large ribosomal subunit protein uL15 / Large ribosomal subunit protein eL24A / Large ribosomal subunit protein uL23 / Large ribosomal subunit protein eL39 / Large ribosomal subunit protein uL30A / Large ribosomal subunit protein uL6A / Large ribosomal subunit protein uL22A / Large ribosomal subunit protein uL24A / Large ribosomal subunit protein eL33A / Large ribosomal subunit protein eL36A ...Large ribosomal subunit protein uL15 / Large ribosomal subunit protein eL24A / Large ribosomal subunit protein uL23 / Large ribosomal subunit protein eL39 / Large ribosomal subunit protein uL30A / Large ribosomal subunit protein uL6A / Large ribosomal subunit protein uL22A / Large ribosomal subunit protein uL24A / Large ribosomal subunit protein eL33A / Large ribosomal subunit protein eL36A / Large ribosomal subunit protein eL29 / Large ribosomal subunit protein eL15A / Large ribosomal subunit protein eL22A / Large ribosomal subunit protein uL5A / 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 / Large ribosomal subunit protein uL14A / Large ribosomal subunit protein uL2A / Large ribosomal subunit protein eL18A / Large ribosomal subunit protein eL19A / Large ribosomal subunit protein uL29A / Small ribosomal subunit protein eS32B / Large ribosomal subunit protein uL4A / Putative major capsid protein p72 / Large ribosomal subunit protein uL3 / eIF-2-alpha kinase GCN2 / Large ribosomal subunit protein eL8A / Large ribosomal subunit protein uL18 / Large ribosomal subunit protein uL13A / Large ribosomal subunit protein eL14A / Large ribosomal subunit protein eL32 / Large ribosomal subunit protein uL16 / Large ribosomal subunit protein eL37A / Large ribosomal subunit protein eL38 / Large ribosomal subunit protein eL34A / Large ribosomal subunit protein eL6A / Large ribosomal subunit protein eL21A / LPS-assembly protein LptD Similarity search - Component
Biological species
Saccharomyces cerevisiae (brewer's yeast)
Method
single particle reconstruction / cryo EM / Resolution: 3.1 Å
Journal: Proc Natl Acad Sci U S A / Year: 2025 Title: Structure of a Gcn2 dimer in complex with the large 60S ribosomal subunit. Authors: Helge Paternoga / Lu Xia / Lyudmila Dimitrova-Paternoga / Sihan Li / Liewei L Yan / Malte Oestereich / Sergo Kasvandik / Ankanahalli N Nanjaraj Urs / Bertrand Beckert / Tanel Tenson / Hani ...Authors: Helge Paternoga / Lu Xia / Lyudmila Dimitrova-Paternoga / Sihan Li / Liewei L Yan / Malte Oestereich / Sergo Kasvandik / Ankanahalli N Nanjaraj Urs / Bertrand Beckert / Tanel Tenson / Hani Zaher / Toshifumi Inada / Daniel N Wilson / Abstract: The integrated stress response (ISR) is a central signaling network that enables eukaryotic cells to respond to a variety of different environmental stresses. Such stresses cause ribosome collisions ...The integrated stress response (ISR) is a central signaling network that enables eukaryotic cells to respond to a variety of different environmental stresses. Such stresses cause ribosome collisions that lead to activation of the kinase Gcn2, resulting in the phosphorylation and inactivation of eukaryotic initiation factor 2 and thereby promoting selective translation of mRNAs to restore homeostasis. Despite the importance of the ISR and intensive study over the past decades, structural insight into how Gcn2 interacts with ribosomal particles has been lacking. Using ex vivo affinity purification approaches, we have obtained a cryoelectron microscopy structure of a yeast Gcn2 dimer in complex with the ribosomal 60S subunit. The Gcn2 dimer is formed by dimerization of the histidine tRNA synthetase-like domains, which establish extensive interactions with the stalk-base and sarcin-ricin loop of the 60S subunit. The C-terminal domain of Gcn2 is also dimerized and occupies the A- and P-site tRNA binding sites at the peptidyl-transferase center of the 60S subunit. Complementary functional studies indicate that binding of Gcn2 to the 60S subunit does not require the coactivators Gcn1 or Gcn20, nor does it lead to phosphorylation of eIF2α. Instead, upon stress, we observe a shift of Gcn2 from the 60S subunit into the colliding ribosome fraction, suggesting that the Gcn2-60S complex represents an inactive stand-by state to enable a rapid redistribution to collided ribosomes, and thereby facilitating a quick and efficient response to stress.
Name: ZINC ION / type: ligand / ID: 46 / Number of copies: 5 / Formula: ZN
Molecular weight
Theoretical: 65.409 Da
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Experimental details
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Structure determination
Method
cryo EM
Processing
single particle reconstruction
Aggregation state
particle
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Sample preparation
Buffer
pH: 7.5
Grid
Model: Quantifoil R3/3 / Material: COPPER / Mesh: 300 / Support film - Material: CARBON / Support film - topology: CONTINUOUS / Support film - Film thickness: 3
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