+ Open data
Open data
- Basic information
Basic information
| Entry | Database: EMDB / ID: EMD-11219 | |||||||||
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| Title | Cryo-EM structure of DNA-PK dimer | |||||||||
|  Map data | ||||||||||
|  Sample | 
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|  Keywords | Kinase / DNA-PKcs / NHEJ / DNA-repair / DNA-PK / DNA BINDING PROTEIN / Ku70/80 | |||||||||
| Function / homology |  Function and homology information positive regulation of platelet formation / Ku70:Ku80 complex / negative regulation of t-circle formation / T cell receptor V(D)J recombination / DNA end binding / pro-B cell differentiation / small-subunit processome assembly / positive regulation of lymphocyte differentiation / DNA-dependent protein kinase activity / DNA-dependent protein kinase complex ...positive regulation of platelet formation / Ku70:Ku80 complex / negative regulation of t-circle formation / T cell receptor V(D)J recombination / DNA end binding / pro-B cell differentiation / small-subunit processome assembly / positive regulation of lymphocyte differentiation / DNA-dependent protein kinase activity / DNA-dependent protein kinase complex / histone H2AXS139 kinase activity / DNA-dependent protein kinase-DNA ligase 4 complex / immunoglobulin V(D)J recombination / nonhomologous end joining complex / immature B cell differentiation / regulation of smooth muscle cell proliferation / cellular response to X-ray / nuclear telomere cap complex / double-strand break repair via alternative nonhomologous end joining / regulation of epithelial cell proliferation / double-strand break repair via classical nonhomologous end joining / telomere capping / Cytosolic sensors of pathogen-associated DNA  / IRF3-mediated induction of type I IFN / positive regulation of neurogenesis / regulation of hematopoietic stem cell differentiation / recombinational repair / regulation of telomere maintenance / U3 snoRNA binding / protein localization to chromosome, telomeric region / maturation of 5.8S rRNA / T cell lineage commitment / cellular hyperosmotic salinity response / negative regulation of cGAS/STING signaling pathway / positive regulation of double-strand break repair via nonhomologous end joining / 2-LTR circle formation / B cell lineage commitment / telomeric DNA binding / hematopoietic stem cell proliferation / negative regulation of protein phosphorylation / positive regulation of protein kinase activity / Lyases; Carbon-oxygen lyases; Other carbon-oxygen lyases / site of DNA damage / peptidyl-threonine phosphorylation / 5'-deoxyribose-5-phosphate lyase activity / hematopoietic stem cell differentiation / ATP-dependent activity, acting on DNA / ectopic germ cell programmed cell death / somitogenesis / telomere maintenance via telomerase / mitotic G1 DNA damage checkpoint signaling / neurogenesis / telomere maintenance / activation of innate immune response / DNA helicase activity / cyclin binding / positive regulation of erythrocyte differentiation / positive regulation of translation / cellular response to leukemia inhibitory factor / response to gamma radiation / small-subunit processome / enzyme activator activity / Nonhomologous End-Joining (NHEJ) / cellular response to gamma radiation / protein-DNA complex / regulation of circadian rhythm / brain development / protein destabilization / peptidyl-serine phosphorylation / double-strand break repair via nonhomologous end joining / protein modification process / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / cellular response to insulin stimulus / intrinsic apoptotic signaling pathway in response to DNA damage / rhythmic process / T cell differentiation in thymus / double-strand break repair / E3 ubiquitin ligases ubiquitinate target proteins / heart development / double-stranded DNA binding / scaffold protein binding / secretory granule lumen / DNA recombination / transcription regulator complex / ficolin-1-rich granule lumen / damaged DNA binding / RNA polymerase II-specific DNA-binding transcription factor binding / chromosome, telomeric region / protein phosphorylation / non-specific serine/threonine protein kinase / protein kinase activity / transcription cis-regulatory region binding / positive regulation of apoptotic process / ribonucleoprotein complex / protein domain specific binding / innate immune response / protein serine kinase activity / negative regulation of DNA-templated transcription / protein serine/threonine kinase activity / ubiquitin protein ligase binding Similarity search - Function | |||||||||
| Biological species |  Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 7.24 Å | |||||||||
|  Authors | Chaplin AK / Hardwick SW | |||||||||
| Funding support |  United Kingdom, 1 items 
 | |||||||||
|  Citation |  Journal: Nat Struct Mol Biol / Year: 2021 Title: Dimers of DNA-PK create a stage for DNA double-strand break repair. Authors: Amanda K Chaplin / Steven W Hardwick / Shikang Liang / Antonia Kefala Stavridi / Ales Hnizda / Lee R Cooper / Taiana Maia De Oliveira / Dimitri Y Chirgadze / Tom L Blundell /  Abstract: DNA double-strand breaks are the most dangerous type of DNA damage and, if not repaired correctly, can lead to cancer. In humans, Ku70/80 recognizes DNA broken ends and recruits the DNA-dependent ...DNA double-strand breaks are the most dangerous type of DNA damage and, if not repaired correctly, can lead to cancer. In humans, Ku70/80 recognizes DNA broken ends and recruits the DNA-dependent protein kinase catalytic subunit (DNA-PKcs) to form DNA-dependent protein kinase holoenzyme (DNA-PK) in the process of non-homologous end joining (NHEJ). We present a 2.8-Å-resolution cryo-EM structure of DNA-PKcs, allowing precise amino acid sequence registration in regions uninterpreted in previous 4.3-Å X-ray maps. We also report a cryo-EM structure of DNA-PK at 3.5-Å resolution and reveal a dimer mediated by the Ku80 C terminus. Central to dimer formation is a domain swap of the conserved C-terminal helix of Ku80. Our results suggest a new mechanism for NHEJ utilizing a DNA-PK dimer to bring broken DNA ends together. Furthermore, drug inhibition of NHEJ in combination with chemo- and radiotherapy has proved successful, making these models central to structure-based drug targeting efforts. #1:   Journal: Nat.Struct.Mol.Biol. / Year: 2020 Title: Dimers of DNA-PK create a stage for DNA-double strand break repair Authors: Chaplin AK / Hardwick SW / Liang S / Stavridi AK / Hnizda A / Cooper LR / De Oliveira TM / Chirgadze DY / Blundell TL | |||||||||
| History | 
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- Structure visualization
Structure visualization
| Movie | 
 
 
  Movie viewer | 
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| Structure viewer | EM map:  SurfView  Molmil  Jmol/JSmol | 
| Supplemental images | 
- Downloads & links
Downloads & links
-EMDB archive
| Map data |  emd_11219.map.gz | 631.9 MB |  EMDB map data format | |
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| Header (meta data) |  emd-11219-v30.xml  emd-11219.xml | 29.8 KB 29.8 KB | Display Display |  EMDB header | 
| FSC (resolution estimation) |  emd_11219_fsc.xml | 25.9 KB | Display |  FSC data file | 
| Images |  emd_11219.png | 32.9 KB | ||
| Filedesc metadata |  emd-11219.cif.gz | 9.9 KB | ||
| Others |  emd_11219_additional_1.map.gz  emd_11219_half_map_1.map.gz  emd_11219_half_map_2.map.gz | 64.1 MB 622.3 MB 622.3 MB | ||
| Archive directory |  http://ftp.pdbj.org/pub/emdb/structures/EMD-11219  ftp://ftp.pdbj.org/pub/emdb/structures/EMD-11219 | HTTPS FTP | 
-Validation report
| Summary document |  emd_11219_validation.pdf.gz | 1.2 MB | Display |  EMDB validaton report | 
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| Full document |  emd_11219_full_validation.pdf.gz | 1.2 MB | Display | |
| Data in XML |  emd_11219_validation.xml.gz | 27.5 KB | Display | |
| Data in CIF |  emd_11219_validation.cif.gz | 36.7 KB | Display | |
| Arichive directory |  https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-11219  ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-11219 | HTTPS FTP | 
-Related structure data
| Related structure data |  6zheMC  6zfpC  6zh2C  6zh4C  6zh6C  6zh8C  6zhaC M: atomic model generated by this map C: citing same article ( | 
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| Similar structure data | 
- Links
Links
| EMDB pages |  EMDB (EBI/PDBe) /  EMDataResource | 
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| Related items in Molecule of the Month | 
- Map
Map
| File |  Download / File: emd_11219.map.gz / Format: CCP4 / Size: 669.9 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: 1.05 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Density | 
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Details | EMDB XML: 
 CCP4 map header: 
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-Supplemental data
-Additional map: Resolve cryoEM density modified map at 5.72 angstrom resolution
| File | emd_11219_additional_1.map | ||||||||||||
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| Annotation | Resolve cryoEM density modified map at 5.72 angstrom resolution | ||||||||||||
| Projections & Slices | 
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| Density Histograms | 
-Half map: #2
| File | emd_11219_half_map_1.map | ||||||||||||
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| Projections & Slices | 
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| Density Histograms | 
-Half map: #1
| File | emd_11219_half_map_2.map | ||||||||||||
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| Projections & Slices | 
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| Density Histograms | 
- Sample components
Sample components
+Entire : DNA-PK dimer
+Supramolecule #1: DNA-PK dimer
+Supramolecule #2: DNA-dependent protein kinase catalytic subunit
+Supramolecule #3: X-ray repair cross-complementing proteins 5 and 6
+Supramolecule #4: DNA
+Macromolecule #1: DNA-dependent protein kinase catalytic subunit,DNA-PKcs
+Macromolecule #2: X-ray repair cross-complementing protein 6
+Macromolecule #3: X-ray repair cross-complementing protein 5
+Macromolecule #4: DNA (25-MER)
+Macromolecule #5: DNA (27-MER)
+Macromolecule #6: DNA (26-MER)
+Macromolecule #7: DNA (28-MER)
-Experimental details
-Structure determination
| Method | cryo EM | 
|---|---|
|  Processing | single particle reconstruction | 
| Aggregation state | particle | 
- Sample preparation
Sample preparation
| Buffer | pH: 7.4 | 
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| Vitrification | Cryogen name: ETHANE | 
- Electron microscopy
Electron microscopy
| Microscope | FEI TITAN KRIOS | 
|---|---|
| Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Average electron dose: 52.97 e/Å2 | 
| Electron beam | Acceleration voltage: 300 kV / Electron source:  FIELD EMISSION GUN | 
| Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD | 
| Experimental equipment |  Model: Titan Krios / Image courtesy: FEI Company | 
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