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- PDB-8rd8: Cryo-EM structure of P. urativorans 70S ribosome in complex with ... -
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Open data
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Basic information
Entry | Database: PDB / ID: 8rd8 | ||||||
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Title | Cryo-EM structure of P. urativorans 70S ribosome in complex with hibernation factors Balon and RaiA (structure 1). | ||||||
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![]() | RIBOSOME / Hibernation factor / Dormancy / Balon | ||||||
Function / homology | ![]() primary metabolic process / guanosine tetraphosphate binding / translation elongation factor activity / large ribosomal subunit / regulation of translation / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / transferase activity ...primary metabolic process / guanosine tetraphosphate binding / translation elongation factor activity / large ribosomal subunit / regulation of translation / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / transferase activity / 5S rRNA binding / large ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / cytosolic large ribosomal subunit / cytoplasmic translation / tRNA binding / rRNA binding / negative regulation of translation / ribosome / structural constituent of ribosome / ribonucleoprotein complex / translation / GTPase activity / mRNA binding / GTP binding / RNA binding / cytosol / cytoplasm Similarity search - Function | ||||||
Biological species | ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.62 Å | ||||||
![]() | Helena-Bueno, K. / Rybak, M.Y. / Gagnon, M.G. / Hill, C.H. / Melnikov, S.V. | ||||||
Funding support | ![]()
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![]() | ![]() Title: A new family of bacterial ribosome hibernation factors. Authors: Karla Helena-Bueno / Mariia Yu Rybak / Chinenye L Ekemezie / Rudi Sullivan / Charlotte R Brown / Charlotte Dingwall / Arnaud Baslé / Claudia Schneider / James P R Connolly / James N Blaza / ...Authors: Karla Helena-Bueno / Mariia Yu Rybak / Chinenye L Ekemezie / Rudi Sullivan / Charlotte R Brown / Charlotte Dingwall / Arnaud Baslé / Claudia Schneider / James P R Connolly / James N Blaza / Bálint Csörgő / Patrick J Moynihan / Matthieu G Gagnon / Chris H Hill / Sergey V Melnikov / ![]() ![]() ![]() Abstract: To conserve energy during starvation and stress, many organisms use hibernation factor proteins to inhibit protein synthesis and protect their ribosomes from damage. In bacteria, two families of ...To conserve energy during starvation and stress, many organisms use hibernation factor proteins to inhibit protein synthesis and protect their ribosomes from damage. In bacteria, two families of hibernation factors have been described, but the low conservation of these proteins and the huge diversity of species, habitats and environmental stressors have confounded their discovery. Here, by combining cryogenic electron microscopy, genetics and biochemistry, we identify Balon, a new hibernation factor in the cold-adapted bacterium Psychrobacter urativorans. We show that Balon is a distant homologue of the archaeo-eukaryotic translation factor aeRF1 and is found in 20% of representative bacteria. During cold shock or stationary phase, Balon occupies the ribosomal A site in both vacant and actively translating ribosomes in complex with EF-Tu, highlighting an unexpected role for EF-Tu in the cellular stress response. Unlike typical A-site substrates, Balon binds to ribosomes in an mRNA-independent manner, initiating a new mode of ribosome hibernation that can commence while ribosomes are still engaged in protein synthesis. Our work suggests that Balon-EF-Tu-regulated ribosome hibernation is a ubiquitous bacterial stress-response mechanism, and we demonstrate that putative Balon homologues in Mycobacteria bind to ribosomes in a similar fashion. This finding calls for a revision of the current model of ribosome hibernation inferred from common model organisms and holds numerous implications for how we understand and study ribosome hibernation. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 3.1 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 | ![]() 19067MC ![]() 8rdvC ![]() 8rdwC ![]() 8v9jC ![]() 8v9kC ![]() 8v9lC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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1 |
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Components
-Protein , 3 types, 3 molecules BHD
#1: Protein | Mass: 41159.938 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
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#3: Protein | Mass: 43108.789 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#55: Protein | Mass: 14105.898 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Small ribosomal subunit protein ... , 20 types, 20 molecules FR3A4E5L6FGHKOLMMSPBQGSCTKUNVJYQZPjDmTo
#2: Protein | Mass: 14278.470 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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#6: Protein | Mass: 8973.312 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#7: Protein | Mass: 29465.469 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#8: Protein | Mass: 18192.918 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#9: Protein | Mass: 13753.143 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#19: Protein | Mass: 15839.572 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#23: Protein | Mass: 11777.817 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#24: Protein | Mass: 10218.672 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#25: Protein | Mass: 13244.396 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#28: Protein | Mass: 10336.156 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#29: Protein | Mass: 14086.257 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#31: Protein | Mass: 17760.559 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#32: Protein | Mass: 27120.340 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#33: Protein | Mass: 13676.589 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#34: Protein | Mass: 8548.242 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#37: Protein | Mass: 11635.426 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#38: Protein | Mass: 10362.991 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#48: Protein | Mass: 9955.363 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#51: Protein | Mass: 24279.043 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#53: Protein | Mass: 9980.646 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
+Large ribosomal subunit protein ... , 29 types, 29 molecules C1F7E9aAMBUCWDXERFVHTIfJPOGRYWIXBaQbNcKdJeAfLgdhOibkClSnep
-RNA chain , 3 types, 3 molecules Z2D8iN
#5: RNA chain | Mass: 933602.188 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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#11: RNA chain | Mass: 36948.945 Da / Num. of mol.: 1 / Mutation: insertion of 85, C89A / Source method: isolated from a natural source / Source: (natural) ![]() |
#26: RNA chain | Mass: 514949.750 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
-Non-polymers , 1 types, 2 molecules ![](data/chem/img/MG.gif)
#56: Chemical |
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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
Component | Name: Ribosomes isolated from ice-treated cultures of Psychrobacter urativorans. Type: RIBOSOME / Entity ID: #1-#55 / Source: NATURAL |
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Source (natural) | Organism: ![]() |
Buffer solution | pH: 7.5 |
Specimen | Conc.: 0.75 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: TFS KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2400 nm / Nominal defocus min: 900 nm |
Image recording | Electron dose: 40 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k) |
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Processing
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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3D reconstruction | Resolution: 2.62 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 53372 / Num. of class averages: 1 / Symmetry type: POINT |