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Yorodumi- EMDB-13936: Cryo-EM structure of the ribosome from Encephalitozoon cuniculi -
+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-13936 | |||||||||||||||||||||
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Title | Cryo-EM structure of the ribosome from Encephalitozoon cuniculi | |||||||||||||||||||||
Map data | consensus map | |||||||||||||||||||||
Sample |
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Function / homology | Function and homology information rRNA processing / large ribosomal subunit / ribosomal small subunit assembly / small ribosomal subunit / 5S rRNA binding / cytosolic small ribosomal subunit / cytosolic large ribosomal subunit / rRNA binding / ribosome / structural constituent of ribosome ...rRNA processing / large ribosomal subunit / ribosomal small subunit assembly / small ribosomal subunit / 5S rRNA binding / cytosolic small ribosomal subunit / cytosolic large ribosomal subunit / rRNA binding / ribosome / structural constituent of ribosome / translation / nucleolus / RNA binding / nucleus / metal ion binding / cytoplasm Similarity search - Function | |||||||||||||||||||||
Biological species | Encephalitozoon cuniculi (fungus) / Encephalitozoon cuniculi GB-M1 (fungus) | |||||||||||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.7 Å | |||||||||||||||||||||
Authors | Nicholson D / Ranson NA / Melnikov SV | |||||||||||||||||||||
Funding support | United Kingdom, 6 items
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Citation | Journal: Nat Commun / Year: 2022 Title: Adaptation to genome decay in the structure of the smallest eukaryotic ribosome. Authors: David Nicholson / Marco Salamina / Johan Panek / Karla Helena-Bueno / Charlotte R Brown / Robert P Hirt / Neil A Ranson / Sergey V Melnikov / Abstract: The evolution of microbial parasites involves the counterplay between natural selection forcing parasites to improve and genetic drifts forcing parasites to lose genes and accumulate deleterious ...The evolution of microbial parasites involves the counterplay between natural selection forcing parasites to improve and genetic drifts forcing parasites to lose genes and accumulate deleterious mutations. Here, to understand how this counterplay occurs at the scale of individual macromolecules, we describe cryo-EM structure of ribosomes from Encephalitozoon cuniculi, a eukaryote with one of the smallest genomes in nature. The extreme rRNA reduction in E. cuniculi ribosomes is accompanied with unparalleled structural changes, such as the evolution of previously unknown molten rRNA linkers and bulgeless rRNA. Furthermore, E. cuniculi ribosomes withstand the loss of rRNA and protein segments by evolving an ability to use small molecules as structural mimics of degenerated rRNA and protein segments. Overall, we show that the molecular structures long viewed as reduced, degenerated, and suffering from debilitating mutations possess an array of compensatory mechanisms that allow them to remain active despite the extreme molecular reduction. | |||||||||||||||||||||
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_13936.map.gz | 294.9 MB | EMDB map data format | |
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Header (meta data) | emd-13936-v30.xml emd-13936.xml | 115.6 KB 115.6 KB | Display Display | EMDB header |
FSC (resolution estimation) | emd_13936_fsc.xml | 18.1 KB | Display | FSC data file |
Images | emd_13936.png | 144.2 KB | ||
Masks | emd_13936_msk_1.map | 512 MB | Mask map | |
Others | emd_13936_additional_1.map.gz emd_13936_additional_2.map.gz emd_13936_half_map_1.map.gz emd_13936_half_map_2.map.gz | 292.8 MB 283.8 MB 411 MB 410.9 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-13936 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-13936 | HTTPS FTP |
-Validation report
Summary document | emd_13936_validation.pdf.gz | 523.1 KB | Display | EMDB validaton report |
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Full document | emd_13936_full_validation.pdf.gz | 522.6 KB | Display | |
Data in XML | emd_13936_validation.xml.gz | 26.8 KB | Display | |
Data in CIF | emd_13936_validation.cif.gz | 35.1 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-13936 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-13936 | HTTPS FTP |
-Related structure data
Related structure data | 7qepMC M: atomic model generated by this map C: citing same article (ref.) |
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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_13936.map.gz / Format: CCP4 / Size: 512 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | consensus map | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 0.861 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Mask #1
File | emd_13936_msk_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Additional map: small subunit body map
File | emd_13936_additional_1.map | ||||||||||||
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Annotation | small subunit body map | ||||||||||||
Projections & Slices |
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Density Histograms |
-Additional map: small subunit head map
File | emd_13936_additional_2.map | ||||||||||||
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Annotation | small subunit head map | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: consensus half map 1
File | emd_13936_half_map_1.map | ||||||||||||
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Annotation | consensus half map 1 | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: consensus half map 2
File | emd_13936_half_map_2.map | ||||||||||||
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Annotation | consensus half map 2 | ||||||||||||
Projections & Slices |
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Density Histograms |
-Sample components
+Entire : Ribosome from Encephalitozoon cuniculi
+Supramolecule #1: Ribosome from Encephalitozoon cuniculi
+Supramolecule #2: large subunit
+Supramolecule #3: small subunit
+Macromolecule #1: Guanine nucleotide binding protein beta subunit
+Macromolecule #5: 40S RIBOSOMAL PROTEIN S10
+Macromolecule #6: 40S RIBOSOMAL PROTEIN S11
+Macromolecule #7: 40S RIBOSOMAL PROTEIN S12
+Macromolecule #8: 40S ribosomal protein S13
+Macromolecule #9: 40S ribosomal protein S14
+Macromolecule #10: RIBOSOMAL PROTEIN S15
+Macromolecule #11: 40S RIBOSOMAL PROTEIN S16
+Macromolecule #12: 40S ribosomal protein S17
+Macromolecule #13: 40S ribosomal protein S18
+Macromolecule #14: 40S ribosomal protein S19
+Macromolecule #15: 40S RIBOSOMAL PROTEIN S20
+Macromolecule #16: ECU11_0225 protein
+Macromolecule #17: 40S RIBOSOMAL PROTEIN S15A (S22 in yeast)
+Macromolecule #18: 40S ribosomal protein S23
+Macromolecule #19: 40S RIBOSOMAL PROTEIN S24
+Macromolecule #20: 40S ribosomal protein S25
+Macromolecule #21: 40S ribosomal protein S26
+Macromolecule #22: 40S RIBOSOMAL PROTEIN S27
+Macromolecule #23: 40S RIBOSOMAL PROTEIN S28
+Macromolecule #24: 40S ribosomal protein S29
+Macromolecule #25: Similarity to monoubiquitin/carboxy-extension protein fusion
+Macromolecule #26: 60S ribosomal protein L1
+Macromolecule #27: 60S ribosomal protein L8
+Macromolecule #28: 60S ribosomal protein L3
+Macromolecule #29: 60S RIBOSOMAL PROTEIN L4
+Macromolecule #30: 60S RIBOSOMAL PROTEIN L5
+Macromolecule #31: 60S RIBOSOMAL PROTEIN L6
+Macromolecule #32: 60S ribosomal protein L7
+Macromolecule #33: 60S ribosomal protein L7a
+Macromolecule #34: 60S RIBOSOMAL PROTEIN L9
+Macromolecule #35: 60S ribosomal protein L10
+Macromolecule #36: 60S ribosomal protein L11
+Macromolecule #37: 60S RIBOSOMAL PROTEIN L13
+Macromolecule #38: ECU06_1215 protein
+Macromolecule #39: Ribosomal protein L15
+Macromolecule #40: 60S RIBOSOMAL PROTEIN L13A (L16)
+Macromolecule #41: 60S RIBOSOMAL PROTEIN L17
+Macromolecule #42: 60S RIBOSOMAL PROTEIN L18
+Macromolecule #43: 60S RIBOSOMAL PROTEIN L19
+Macromolecule #44: Uncharacterized protein ECU01_0250
+Macromolecule #45: ECU06_1135 protein
+Macromolecule #46: 60S ribosomal protein L20
+Macromolecule #47: 60S ribosomal protein L21
+Macromolecule #48: 60S ribosomal protein L22
+Macromolecule #49: 60S ribosomal protein L23
+Macromolecule #50: Similarity to 60S RIBOSOMAL PROTEIN L24
+Macromolecule #51: 60S RIBOSOMAL PROTEIN L23A
+Macromolecule #52: 60S RIBOSOMAL PROTEIN L26
+Macromolecule #53: 60S RIBOSOMAL PROTEIN L27
+Macromolecule #54: 60S ribosomal protein L27a
+Macromolecule #55: 60S ribosomal protein L29
+Macromolecule #56: 60S RIBOSOMAL PROTEIN L30
+Macromolecule #57: 60S ribosomal protein L31
+Macromolecule #58: 60S ribosomal protein L32
+Macromolecule #59: 60S RIBOSOMAL PROTEIN L35A (L33)
+Macromolecule #60: 60S ribosomal protein L34
+Macromolecule #61: 60S ribosomal protein L35-1
+Macromolecule #62: 60S ribosomal protein L36
+Macromolecule #63: 60S ribosomal protein L37
+Macromolecule #64: 60S ribosomal protein L39
+Macromolecule #65: UBIQUITIN/ L40 RIBOSOMAL PROTEIN FUSION
+Macromolecule #66: 60S ribosomal protein L44
+Macromolecule #67: 60S RIBOSOMAL PROTEIN L37A (L43)
+Macromolecule #68: 40S ribosomal protein S0
+Macromolecule #69: 40S ribosomal protein S1
+Macromolecule #70: 40S RIBOSOMAL PROTEIN S2
+Macromolecule #71: 40S ribosomal protein S3
+Macromolecule #72: 40S ribosomal protein S4
+Macromolecule #73: 40S ribosomal protein S5
+Macromolecule #74: 40S ribosomal protein S6
+Macromolecule #75: 40S ribosomal protein S7
+Macromolecule #76: 40S ribosomal protein S8
+Macromolecule #77: 40S ribosomal protein S9
+Macromolecule #2: 5.8S-23S ribosomal RNA
+Macromolecule #3: 5S ribosomal RNA
+Macromolecule #4: 18S ribosomal RNA
+Macromolecule #78: ZINC ION
+Macromolecule #79: ADENOSINE MONOPHOSPHATE
+Macromolecule #80: SPERMIDINE
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 7.5 Component:
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Grid | Model: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 400 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Atmosphere: AIR / Details: Quorum GloQube, 10 mA | ||||||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV Details: Quantifoil grids (R1.2/1.3, 400 mesh, copper) were glow discharged (10 mA, 30s, Quorum GloQube), and 3 microlitres of the crude sample of E. cuniculi ribosomes (300 nM) was pipetted onto a ...Details: Quantifoil grids (R1.2/1.3, 400 mesh, copper) were glow discharged (10 mA, 30s, Quorum GloQube), and 3 microlitres of the crude sample of E. cuniculi ribosomes (300 nM) was pipetted onto a grid. Excess sample was immediately blotted off and vitrification was performed by plunging the grid into liquid nitrogen-cooled liquid ethane at 100% humidity and 4 degrees celsius using an FEI Vitrobot Mark IV (Thermo Fisher). |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: FEI FALCON III (4k x 4k) / Detector mode: INTEGRATING / Digitization - Dimensions - Width: 4096 pixel / Digitization - Dimensions - Height: 4096 pixel / Number real images: 2210 / Average exposure time: 1.35 sec. / Average electron dose: 60.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | C2 aperture diameter: 70.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.6 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 96000 |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
+Image processing
-Atomic model buiding 1
Initial model | (PDB ID: , ) |
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Details | The model was built using fragments of S. cerevisiae (pdb id 4v88) and V. necatrix ribosomes (pdb id 6rm3) as starting models that were edited using Coot using genomic sequences of the E. cuniculi strain GB-M1 to model rRNA and ribosomal proteins. For ribosomal proteins that are encoded by two alternative genes (with one gene coding for a zinc-coordinating protein and another gene coding for a zinc-free ribosomal protein), we used zinc-coordinating isoforms, because the cryo-EM map revealed the presence of these isoforms and not their zinc-free paralogs in the ribosome structure. The identity of protein msL2 in the ribosome structure was determined using the genomic sequence of the E. cuniculi strain GB-M1 and the cryo-EM map that revealed a unique combination of aromatic and bulky amino acids in its structure: the cryo-EM map showed that msL2 has a tyrosine residue at position 5, a tryptophan residue at position 9, and lysine or arginine residues at positions 10, 12 and 13. The only protein with this sequence was the hypothetical protein ECU06_1135, whose sequence and length were fully consistent with the cryo-EM map. The structure of E. cuniculi ribosomes was refined using Phenix real space refine and validated using MolProbity within Phenix and PDB OneDep. The parts of the model corresponding to the 60S, 40S body and 40S head were built and refined using the consensus map, 40S body multibody map and 40S head multibody map, respectively. |
Refinement | Space: REAL / Protocol: OTHER / Target criteria: correlation coefficient |
Output model | PDB-7qep: |