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Yorodumi- EMDB-1728: 70S Ribosome and Human U4U6U5 tri-snRNP Determined by Cryo-Random... -
+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-1728 | |||||||||
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Title | 70S Ribosome and Human U4U6U5 tri-snRNP Determined by Cryo-Random Conical Tilt | |||||||||
Map data | This 3D map is a weighted average cryo RCT structure of the 70S ribosome. | |||||||||
Sample |
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Keywords | Ribosome wRCT cryo-RCT | |||||||||
Biological species | Escherichia coli (E. coli) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 31.0 Å | |||||||||
Authors | Sander B / Golas MM / Luhrmann R / Stark H | |||||||||
Citation | Journal: Structure / Year: 2010 Title: An approach for de novo structure determination of dynamic molecular assemblies by electron cryomicroscopy. Authors: Bjoern Sander / Monika M Golas / Reinhard Lührmann / Holger Stark / Abstract: Single-particle electron cryomicroscopy is a powerful method for three-dimensional (3D) structure determination of macromolecular assemblies. Here we address the challenge of determining a 3D ...Single-particle electron cryomicroscopy is a powerful method for three-dimensional (3D) structure determination of macromolecular assemblies. Here we address the challenge of determining a 3D structure in the absence of reference models. The 3D structures are determined by alignment and weighted averaging of densities obtained by native cryo random conical tilt (RCT) reconstructions including consideration of missing data. Our weighted averaging scheme (wRCT) offers advantages for potentially heterogeneous 3D densities of low signal-to-noise ratios. Sets of aligned RCT structures can also be analyzed by multivariate statistical analysis (MSA) to provide insights into snapshots of the assemblies. The approach is used to compute 3D structures of the Escherichia coli 70S ribosome and the human U4/U6.U5 tri-snRNP under vitrified unstained cryo conditions, and to visualize by 3D MSA the L7/L12 stalk of the 70S ribosome and states of tri-snRNP. The approach thus combines de novo 3D structure determination with an analysis of compositional and conformational heterogeneity. | |||||||||
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_1728.map.gz | 2 MB | EMDB map data format | |
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Header (meta data) | emd-1728-v30.xml emd-1728.xml | 6.7 KB 6.7 KB | Display Display | EMDB header |
Images | 1728.gif 1728.tif | 68.7 KB 291.7 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-1728 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-1728 | HTTPS FTP |
-Related 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_1728.map.gz / Format: CCP4 / Size: 3.3 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | This 3D map is a weighted average cryo RCT structure of the 70S ribosome. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 4.9 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 : E. coli 70S ribosome
Entire | Name: E. coli 70S ribosome |
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Components |
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-Supramolecule #1000: E. coli 70S ribosome
Supramolecule | Name: E. coli 70S ribosome / type: sample / ID: 1000 / Details: The sample was monodisperse / Number unique components: 1 |
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-Supramolecule #1: Ribosome
Supramolecule | Name: Ribosome / type: complex / ID: 1 / Name.synonym: E. coli 70S / Recombinant expression: No / Ribosome-details: ribosome-prokaryote: ALL |
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Source (natural) | Organism: Escherichia coli (E. coli) |
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Vitrification | Cryogen name: ETHANE / Instrument: OTHER |
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-Electron microscopy
Microscope | FEI/PHILIPS CM200FEG |
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Electron beam | Acceleration voltage: 160 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELDBright-field microscopy |
Sample stage | Specimen holder: Eucentric / Specimen holder model: GATAN LIQUID NITROGEN |
-Image processing
Final reconstruction | Applied symmetry - Point group: C1 (asymmetric) / Algorithm: OTHER / Resolution.type: BY AUTHOR / Resolution: 31.0 Å / Resolution method: OTHER |
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-Atomic model buiding 1
Initial model | PDB ID: 2aw7 |
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Details | Protocol: Rigid Body |
Refinement | Space: REAL / Protocol: RIGID BODY FIT |
-Atomic model buiding 2
Initial model | PDB ID: 2awb |
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Details | Protocol: Rigid Body |
Refinement | Space: REAL / Protocol: RIGID BODY FIT |