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Yorodumi- EMDB-8621: The cryo-EM structure of YjeQ bound to the 30S subunit suggests a... -
+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-8621 | |||||||||
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Title | The cryo-EM structure of YjeQ bound to the 30S subunit suggests a fidelity checkpoint function for this protein in ribosome assembly | |||||||||
Map data | Structure of the mature 30S subunit in complex with YjeQ (RsgA) GTPase | |||||||||
Sample |
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Function / homology | Function and homology information guanosine tetraphosphate binding / ornithine decarboxylase inhibitor activity / Hydrolases; Acting on acid anhydrides; In phosphorus-containing anhydrides / transcription antitermination factor activity, RNA binding / four-way junction DNA binding / negative regulation of translational initiation / mRNA regulatory element binding translation repressor activity / transcription elongation factor complex / regulation of DNA-templated transcription elongation / DNA endonuclease activity ...guanosine tetraphosphate binding / ornithine decarboxylase inhibitor activity / Hydrolases; Acting on acid anhydrides; In phosphorus-containing anhydrides / transcription antitermination factor activity, RNA binding / four-way junction DNA binding / negative regulation of translational initiation / mRNA regulatory element binding translation repressor activity / transcription elongation factor complex / regulation of DNA-templated transcription elongation / DNA endonuclease activity / transcription antitermination / DNA-templated transcription termination / maintenance of translational fidelity / mRNA 5'-UTR binding / ribosomal small subunit biogenesis / GDP binding / small ribosomal subunit rRNA binding / ribosome biogenesis / regulation of translation / ribosomal small subunit assembly / small ribosomal subunit / cytosolic small ribosomal subunit / cytoplasmic translation / tRNA binding / negative regulation of translation / rRNA binding / ribosome / structural constituent of ribosome / translation / ribonucleoprotein complex / response to antibiotic / GTPase activity / mRNA binding / GTP binding / RNA binding / zinc ion binding / membrane / metal ion binding / cytosol / cytoplasm Similarity search - Function | |||||||||
Biological species | Escherichia coli (E. coli) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 5.8 Å | |||||||||
Authors | Razi A / Guarne A / Ortega J | |||||||||
Funding support | Canada, 1 items
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Citation | Journal: Proc Natl Acad Sci U S A / Year: 2017 Title: The cryo-EM structure of YjeQ bound to the 30S subunit suggests a fidelity checkpoint function for this protein in ribosome assembly. Authors: Aida Razi / Alba Guarné / Joaquin Ortega / Abstract: Recent work suggests that bacterial YjeQ (RsgA) participates in the late stages of assembly of the 30S subunit and aids the assembly of the decoding center but also binds the mature 30S subunit with ...Recent work suggests that bacterial YjeQ (RsgA) participates in the late stages of assembly of the 30S subunit and aids the assembly of the decoding center but also binds the mature 30S subunit with high affinity. To determine the function and mechanisms of YjeQ in the context of the mature subunit, we determined the cryo-EM structure of the fully assembled 30S subunit in complex with YjeQ at 5.8-Å resolution. We found that binding of YjeQ stabilizes helix 44 into a conformation similar to that adopted by the subunit during proofreading. This finding indicates that, along with acting as an assembly factor, YjeQ has a role as a checkpoint protein, consisting of testing the proofreading ability of the 30S subunit. The structure also informs the mechanism by which YjeQ implements the release from the 30S subunit of a second assembly factor, called RbfA. Finally, it reveals how the 30S subunit stimulates YjeQ GTPase activity and leads to release of the protein. Checkpoint functions have been described for eukaryotic ribosome assembly factors; however, this work describes an example of a bacterial assembly factor that tests a specific translation mechanism of the 30S subunit. | |||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_8621.map.gz | 4.4 MB | EMDB map data format | |
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Header (meta data) | emd-8621-v30.xml emd-8621.xml | 32.9 KB 32.9 KB | Display Display | EMDB header |
FSC (resolution estimation) | emd_8621_fsc.xml | 7.8 KB | Display | FSC data file |
Images | emd_8621.png | 46.4 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-8621 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-8621 | HTTPS FTP |
-Validation report
Summary document | emd_8621_validation.pdf.gz | 363.6 KB | Display | EMDB validaton report |
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Full document | emd_8621_full_validation.pdf.gz | 363.2 KB | Display | |
Data in XML | emd_8621_validation.xml.gz | 10.2 KB | Display | |
Data in CIF | emd_8621_validation.cif.gz | 13.2 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-8621 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-8621 | HTTPS FTP |
-Related structure data
Related structure data | 5uz4MC 8626C 8627C 8628C C: citing same article (ref.) M: atomic model generated by this map |
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Similar structure data |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_8621.map.gz / Format: CCP4 / Size: 40.6 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | Structure of the mature 30S subunit in complex with YjeQ (RsgA) GTPase | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.45 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Sample components
+Entire : Structure of the 30S subunit in complex with YjeQ GTPase
+Supramolecule #1: Structure of the 30S subunit in complex with YjeQ GTPase
+Macromolecule #1: 16S RIBOSOMAL RNA
+Macromolecule #2: 30S ribosomal protein S3
+Macromolecule #3: 30S ribosomal protein S4
+Macromolecule #4: 30S ribosomal protein S5
+Macromolecule #5: 30S ribosomal protein S6
+Macromolecule #6: 30S ribosomal protein S7
+Macromolecule #7: 30S ribosomal protein S8
+Macromolecule #8: 30S ribosomal protein S9
+Macromolecule #9: 30S ribosomal protein S10
+Macromolecule #10: 30S ribosomal protein S11
+Macromolecule #11: 30S ribosomal protein S12
+Macromolecule #12: 30S ribosomal protein S13
+Macromolecule #13: 30S ribosomal protein S14
+Macromolecule #14: 30S ribosomal protein S15
+Macromolecule #15: 30S ribosomal protein S16
+Macromolecule #16: 30S ribosomal protein S17
+Macromolecule #17: 30S ribosomal protein S18
+Macromolecule #18: 30S ribosomal protein S19
+Macromolecule #19: 30S ribosomal protein S20
+Macromolecule #20: 30S ribosomal protein S2
+Macromolecule #21: Small ribosomal subunit biogenesis GTPase RsgA
+Macromolecule #22: ZINC ION
+Macromolecule #23: 3'-O-(N-methylanthraniloyl)-beta:gamma-imidoguanosine-5'-triphosphate
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 7.5 |
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Grid | Model: C-flat CFT-222C / Material: COPPER / Mesh: 200 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 298 K / Instrument: FEI VITROBOT MARK III |
-Electron microscopy
Microscope | FEI TECNAI F20 |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Digitization - Frames/image: 1-20 / Average exposure time: 0.5 sec. / Average electron dose: 1.0 e/Å2 |
Electron beam | Acceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN |
Electron optics | C2 aperture diameter: 50.0 µm / Calibrated magnification: 34482 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.0 mm / Nominal defocus max: 3.0 µm / Nominal defocus min: 0.5 µm / Nominal magnification: 25000 |
Sample stage | Specimen holder model: GATAN 626 SINGLE TILT LIQUID NITROGEN CRYO TRANSFER HOLDER Cooling holder cryogen: NITROGEN |
Experimental equipment | Model: Tecnai F20 / Image courtesy: FEI Company |
+Image processing
-Atomic model buiding 1
Refinement | Protocol: OTHER |
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Output model | PDB-5uz4: |