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- EMDB-19282: Conformational Landscape of the Type V-K CRISPR-associated Transp... -
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Open data
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Basic information
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Title | Conformational Landscape of the Type V-K CRISPR-associated TransposonIntegration Assembly CAST V-K Cas12k domain local-refinement map | |||||||||
![]() | CAST V-K Cas12k domain local-refinement map | |||||||||
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![]() | CRISPR-associated Transposon genome editing transposition / ![]() | |||||||||
Function / homology | ![]() cytosolic small ribosomal subunit / ![]() ![]() Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | ![]() ![]() | |||||||||
![]() | Tenjo-Castano F / Mesa P / Montoya G | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Conformational landscape of the type V-K CRISPR-associated transposon integration assembly. Authors: Francisco Tenjo-Castaño / Nicholas Sofos / Luisa S Stutzke / Piero Temperini / Anders Fuglsang / Tillmann Pape / Pablo Mesa / Guillermo Montoya / ![]() Abstract: CRISPR-associated transposons (CASTs) are mobile genetic elements that co-opt CRISPR-Cas systems for RNA-guided DNA transposition. CASTs integrate large DNA cargos into the attachment (att) site ...CRISPR-associated transposons (CASTs) are mobile genetic elements that co-opt CRISPR-Cas systems for RNA-guided DNA transposition. CASTs integrate large DNA cargos into the attachment (att) site independently of homology-directed repair and thus hold promise for eukaryotic genome engineering. However, the functional diversity and complexity of CASTs hinder an understanding of their mechanisms. Here, we present the high-resolution cryoelectron microscopy (cryo-EM) structure of the reconstituted ∼1 MDa post-transposition complex of the type V-K CAST, together with different assembly intermediates and diverse TnsC filament lengths, thus enabling the recapitulation of the integration complex formation. The results of mutagenesis experiments probing the roles of specific residues and TnsB-binding sites show that transposition activity can be enhanced and suggest that the distance between the PAM and att sites is determined by the lengths of the TnsB C terminus and the TnsC filament. This singular model of RNA-guided transposition provides a foundation for repurposing the system for genome-editing applications. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 98.4 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 22.1 KB 22.1 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 28.5 KB | Display | ![]() |
Images | ![]() | 182.6 KB | ||
Masks | ![]() | 106.1 MB | ![]() | |
Filedesc metadata | ![]() | 7.1 KB | ||
Others | ![]() ![]() | 98.6 MB 98.6 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8rktMC ![]() 8rduC ![]() 8rkuC ![]() 8rkvC C: citing same article ( M: atomic model generated by this map |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Map
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Annotation | CAST V-K Cas12k domain local-refinement map | ||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. generated in cubic-lattice coordinate | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 0.728 Å | ||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Mask #1
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Projections & Slices |
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Density Histograms |
-Half map: CAST V-K Cas12k domain local refinement, half-A map
File | emd_19282_half_map_1.map | ||||||||||||
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Annotation | CAST V-K Cas12k domain local refinement, half-A map | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: CAST V-K Cas12k domain local refinement, half-B map
File | emd_19282_half_map_2.map | ||||||||||||
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Annotation | CAST V-K Cas12k domain local refinement, half-B map | ||||||||||||
Projections & Slices |
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Density Histograms |
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Sample components
+Entire : recognition complex
+Supramolecule #1: recognition complex
+Macromolecule #1: sgRNA
+Macromolecule #2: Non-target strand - LE
+Macromolecule #3: Target strand - LE
+Macromolecule #4: ShCas12k
+Macromolecule #5: Small ribosomal subunit protein uS15
+Macromolecule #6: TniQ
+Macromolecule #7: MAGNESIUM ION
+Macromolecule #8: ZINC ION
+Macromolecule #9: water
-Experimental details
-Structure determination
Method | ![]() |
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Aggregation state | particle |
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Sample preparation
Buffer | pH: 7 |
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Grid | Model: UltrAuFoil R0./1 / Material: GOLD / Mesh: 300 |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD![]() |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Image recording | Film or detector model: FEI FALCON IV (4k x 4k) / Number real images: 19936 / Average electron dose: 40.0 e/Å2 |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
Refinement | Protocol: AB INITIO MODEL |
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Output model | ![]() PDB-8rkt: |