+Open data
-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 Ku70:Ku80 complex / negative regulation of t-circle formation / positive regulation of platelet formation / DNA end binding / T cell receptor V(D)J recombination / pro-B cell differentiation / small-subunit processome assembly / positive regulation of lymphocyte differentiation / DNA-dependent protein kinase activity / histone H2AXS139 kinase activity ...Ku70:Ku80 complex / negative regulation of t-circle formation / positive regulation of platelet formation / DNA end binding / T cell receptor V(D)J recombination / pro-B cell differentiation / small-subunit processome assembly / positive regulation of lymphocyte differentiation / DNA-dependent protein kinase activity / histone H2AXS139 kinase activity / DNA-dependent protein kinase complex / DNA-dependent protein kinase-DNA ligase 4 complex / immature B cell differentiation / cellular response to X-ray / nonhomologous end joining complex / immunoglobulin V(D)J recombination / DNA ligation / regulation of smooth muscle cell proliferation / nuclear telomere cap complex / Cytosolic sensors of pathogen-associated DNA / double-strand break repair via alternative nonhomologous end joining / double-strand break repair via classical nonhomologous end joining / IRF3-mediated induction of type I IFN / telomere capping / regulation of epithelial cell proliferation / positive regulation of catalytic activity / recombinational repair / regulation of hematopoietic stem cell differentiation / U3 snoRNA binding / regulation of telomere maintenance / protein localization to chromosome, telomeric region / cellular response to fatty acid / positive regulation of neurogenesis / cellular hyperosmotic salinity response / hematopoietic stem cell proliferation / T cell lineage commitment / maturation of 5.8S rRNA / negative regulation of cGAS/STING signaling pathway / telomeric DNA binding / B cell lineage commitment / positive regulation of double-strand break repair via nonhomologous end joining / 2-LTR circle formation / : / site of DNA damage / Lyases; Carbon-oxygen lyases; Other carbon-oxygen lyases / 5'-deoxyribose-5-phosphate lyase activity / hematopoietic stem cell differentiation / positive regulation of protein kinase activity / ectopic germ cell programmed cell death / ATP-dependent activity, acting on DNA / somitogenesis / mitotic G1 DNA damage checkpoint signaling / positive regulation of telomere maintenance via telomerase / enzyme activator activity / activation of innate immune response / DNA helicase activity / telomere maintenance / cyclin binding / positive regulation of erythrocyte differentiation / neurogenesis / negative regulation of protein phosphorylation / cellular response to leukemia inhibitory factor / protein-DNA complex / small-subunit processome / positive regulation of translation / response to gamma radiation / Nonhomologous End-Joining (NHEJ) / peptidyl-threonine phosphorylation / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / protein destabilization / brain development / protein modification process / regulation of circadian rhythm / cellular response to gamma radiation / double-strand break repair via nonhomologous end joining / cellular response to insulin stimulus / intrinsic apoptotic signaling pathway in response to DNA damage / rhythmic process / double-strand break repair / E3 ubiquitin ligases ubiquitinate target proteins / heart development / T cell differentiation in thymus / scaffold protein binding / double-stranded DNA binding / peptidyl-serine phosphorylation / secretory granule lumen / DNA recombination / RNA polymerase II-specific DNA-binding transcription factor binding / ficolin-1-rich granule lumen / transcription regulator complex / damaged DNA binding / chromosome, telomeric region / transcription cis-regulatory region binding / non-specific serine/threonine protein kinase / protein kinase activity / positive regulation of apoptotic process / ribonucleoprotein complex / response to xenobiotic stimulus / protein phosphorylation / protein domain specific 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
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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
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-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 (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_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
+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 |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 7.4 |
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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 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 |