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Yorodumi- EMDB-33185: CryoEM structure of type IV-A CasDinG bound NTS-nicked Csf-crRNA-... -
+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-33185 | |||||||||
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Title | CryoEM structure of type IV-A CasDinG bound NTS-nicked Csf-crRNA-dsDNA quaternary complex in a second state | |||||||||
Map data | ||||||||||
Sample |
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Keywords | Nuclease / STRUCTURAL PROTEIN-RNA-DNA COMPLEX | |||||||||
Biological species | Pseudomonas aeruginosa (bacteria) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.7 Å | |||||||||
Authors | Zhang JT / Cui N / Huang HD / Jia N | |||||||||
Funding support | 1 items
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Citation | Journal: Mol Cell / Year: 2023 Title: Type IV-A CRISPR-Csf complex: Assembly, dsDNA targeting, and CasDinG recruitment. Authors: Ning Cui / Jun-Tao Zhang / Yongrui Liu / Yanhong Liu / Xiao-Yu Liu / Chongyuan Wang / Hongda Huang / Ning Jia / Abstract: Type IV CRISPR-Cas systems, which are primarily found on plasmids and exhibit a strong plasmid-targeting preference, are the only one of the six known CRISPR-Cas types for which the mechanistic ...Type IV CRISPR-Cas systems, which are primarily found on plasmids and exhibit a strong plasmid-targeting preference, are the only one of the six known CRISPR-Cas types for which the mechanistic details of their function remain unknown. Here, we provide high-resolution functional snapshots of type IV-A Csf complexes before and after target dsDNA binding, either in the absence or presence of CasDinG, revealing the mechanisms underlying Csf complex assembly, "DWN" PAM-dependent dsDNA targeting, R-loop formation, and CasDinG recruitment. Furthermore, we establish that CasDinG, a signature DinG family helicase, harbors ssDNA-stimulated ATPase activity and ATP-dependent 5'-3' DNA helicase activity. In addition, we show that CasDinG unwinds the non-target strand (NTS) and target strand (TS) of target dsDNA from the Csf complex. These molecular details advance our mechanistic understanding of type IV-A CRISPR-Csf function and should enable Csf complexes to be harnessed as genome-engineering tools for biotechnological applications. | |||||||||
History |
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-Structure visualization
Supplemental images |
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-Downloads & links
-EMDB archive
Map data | emd_33185.map.gz | 10.9 MB | EMDB map data format | |
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Header (meta data) | emd-33185-v30.xml emd-33185.xml | 23.1 KB 23.1 KB | Display Display | EMDB header |
Images | emd_33185.png | 66.4 KB | ||
Masks | emd_33185_msk_1.map | 178 MB | Mask map | |
Filedesc metadata | emd-33185.cif.gz | 6.9 KB | ||
Others | emd_33185_half_map_1.map.gz emd_33185_half_map_2.map.gz | 141 MB 141 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-33185 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-33185 | HTTPS FTP |
-Validation report
Summary document | emd_33185_validation.pdf.gz | 930.6 KB | Display | EMDB validaton report |
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Full document | emd_33185_full_validation.pdf.gz | 930.1 KB | Display | |
Data in XML | emd_33185_validation.xml.gz | 14.6 KB | Display | |
Data in CIF | emd_33185_validation.cif.gz | 17.4 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-33185 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-33185 | HTTPS FTP |
-Related structure data
Related structure data | 7xg4MC 7xexC 7xf0C 7xf1C 7xfzC 7xg0C 7xg2C 7xg3C M: atomic model generated by this map C: citing same article (ref.) |
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-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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-Map
File | Download / File: emd_33185.map.gz / Format: CCP4 / Size: 178 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.1 Å | ||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Mask #1
File | emd_33185_msk_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #2
File | emd_33185_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_33185_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Sample components
+Entire : Type IV-A CasDinG bound NTS-nicked Csf-crRNA-dsDNA quaternary com...
+Supramolecule #1: Type IV-A CasDinG bound NTS-nicked Csf-crRNA-dsDNA quaternary com...
+Supramolecule #2: Csf
+Supramolecule #3: crRNA
+Supramolecule #4: dsDNA
+Macromolecule #1: Csf1
+Macromolecule #2: Csf3
+Macromolecule #3: Csf2
+Macromolecule #4: Csf5
+Macromolecule #8: Csf4
+Macromolecule #5: crRNA
+Macromolecule #6: NTS
+Macromolecule #7: TS
+Macromolecule #9: ZINC ION
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 8 |
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Vitrification | Cryogen name: ETHANE |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 50.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.5 µm |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-Image processing
Startup model | Type of model: INSILICO MODEL |
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Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.7 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 8882 |
Initial angle assignment | Type: RANDOM ASSIGNMENT |
Final angle assignment | Type: RANDOM ASSIGNMENT |