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Open data
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Basic information
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| Title | Ku70/80 bound to 153 bp nucleosome | |||||||||
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Keywords | DNA-binding protein / NHEJ / Ku70/80 / nucleosome / DNA BINDING PROTEIN | |||||||||
| Function / homology | Function and homology informationKu70:Ku80 complex / negative regulation of t-circle formation / DNA end binding / small-subunit processome assembly / positive regulation of lymphocyte differentiation / DNA-dependent protein kinase complex / DNA-dependent protein kinase-DNA ligase 4 complex / nonhomologous end joining complex / regulation of smooth muscle cell proliferation / cellular response to X-ray ...Ku70:Ku80 complex / negative regulation of t-circle formation / DNA end binding / small-subunit processome assembly / positive regulation of lymphocyte differentiation / DNA-dependent protein kinase complex / DNA-dependent protein kinase-DNA ligase 4 complex / nonhomologous end joining complex / regulation of smooth muscle cell proliferation / cellular response to X-ray / double-strand break repair via classical nonhomologous end joining / nuclear telomere cap complex / Cytosolic sensors of pathogen-associated DNA / IRF3-mediated induction of type I IFN / recombinational repair / positive regulation of neurogenesis / regulation of telomere maintenance / U3 snoRNA binding / protein localization to chromosome, telomeric region / cellular hyperosmotic salinity response / 2-LTR circle formation / hematopoietic stem cell proliferation / telomeric DNA binding / positive regulation of protein kinase activity / Lyases; Carbon-oxygen lyases; Other carbon-oxygen lyases / site of DNA damage / 5'-deoxyribose-5-phosphate lyase activity / hematopoietic stem cell differentiation / negative regulation of tumor necrosis factor-mediated signaling pathway / ATP-dependent activity, acting on DNA / telomere maintenance via telomerase / negative regulation of megakaryocyte differentiation / protein localization to CENP-A containing chromatin / Chromatin modifying enzymes / Replacement of protamines by nucleosomes in the male pronucleus / CENP-A containing nucleosome / Packaging Of Telomere Ends / neurogenesis / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / Deposition of new CENPA-containing nucleosomes at the centromere / telomere organization / Recognition and association of DNA glycosylase with site containing an affected pyrimidine / Cleavage of the damaged pyrimidine / Interleukin-7 signaling / activation of innate immune response / DNA helicase activity / telomere maintenance / RNA Polymerase I Promoter Opening / epigenetic regulation of gene expression / Inhibition of DNA recombination at telomere / Assembly of the ORC complex at the origin of replication / cyclin binding / Meiotic synapsis / SUMOylation of chromatin organization proteins / Regulation of endogenous retroelements by the Human Silencing Hub (HUSH) complex / DNA methylation / Condensation of Prophase Chromosomes / cellular response to leukemia inhibitory factor / Chromatin modifications during the maternal to zygotic transition (MZT) / SIRT1 negatively regulates rRNA expression / HCMV Late Events / ERCC6 (CSB) and EHMT2 (G9a) positively regulate rRNA expression / PRC2 methylates histones and DNA / Regulation of endogenous retroelements by KRAB-ZFP proteins / innate immune response in mucosa / Defective pyroptosis / HDACs deacetylate histones / Regulation of endogenous retroelements by Piwi-interacting RNAs (piRNAs) / RNA Polymerase I Promoter Escape / Nonhomologous End-Joining (NHEJ) / lipopolysaccharide binding / small-subunit processome / enzyme activator activity / Transcriptional regulation by small RNAs / Formation of the beta-catenin:TCF transactivating complex / cellular response to gamma radiation / protein-DNA complex / Activated PKN1 stimulates transcription of AR (androgen receptor) regulated genes KLK2 and KLK3 / RUNX1 regulates genes involved in megakaryocyte differentiation and platelet function / HDMs demethylate histones / G2/M DNA damage checkpoint / NoRC negatively regulates rRNA expression / double-strand break repair via nonhomologous end joining / B-WICH complex positively regulates rRNA expression / PKMTs methylate histone lysines / DNA Damage/Telomere Stress Induced Senescence / Pre-NOTCH Transcription and Translation / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / Meiotic recombination / Activation of anterior HOX genes in hindbrain development during early embryogenesis / Metalloprotease DUBs / RMTs methylate histone arginines / Transcriptional regulation of granulopoiesis / HCMV Early Events / antimicrobial humoral immune response mediated by antimicrobial peptide / structural constituent of chromatin / UCH proteinases / antibacterial humoral response / heterochromatin formation Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.56 Å | |||||||||
Authors | Hall C / Chaplin AK | |||||||||
| Funding support | Canada, United Kingdom, 2 items
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Citation | Journal: Nat Commun / Year: 2025Title: Cryo-EM structures of NHEJ assemblies with nucleosomes. Authors: Chloe Hall / Philippe Frit / Antonia Kefala-Stavridi / Amandine Pelletier / Steven W Hardwick / Himani Amin / Matthew K Bilyard / Taiana Maia De Oliviera / Ammarah Tariq / Sayma Zahid / ...Authors: Chloe Hall / Philippe Frit / Antonia Kefala-Stavridi / Amandine Pelletier / Steven W Hardwick / Himani Amin / Matthew K Bilyard / Taiana Maia De Oliviera / Ammarah Tariq / Sayma Zahid / Dimitri Y Chirgadze / Shankar Balasubramanian / Katheryn Meek / Virginie Ropars / Jean-Baptiste Charbonnier / Mauro Modesti / Patrick Calsou / Sébastien Britton / Tom L Blundell / Thomas Schalch / Amanda K Chaplin / ![]() Abstract: DNA double-strand breaks (DSBs) are highly deleterious lesions that can trigger cell death or carcinogenesis if unrepaired or misrepaired. In mammals, most DSBs are repaired by non-homologous end ...DNA double-strand breaks (DSBs) are highly deleterious lesions that can trigger cell death or carcinogenesis if unrepaired or misrepaired. In mammals, most DSBs are repaired by non-homologous end joining (NHEJ), which begins when Ku70/80 binds DNA ends and recruits DNA-PKcs to form the DNA-PK holoenzyme. Although recent cryo-EM studies have resolved several NHEJ assemblies, how these factors access DSBs within nucleosomes remains unclear. Here, we present cryo-EM structures of human Ku70/80 and DNA-PK bound to nucleosomes. Ku70/80 binds the DNA end and bends it away from the nucleosome core, while the Ku70 C-terminal SAP domain makes an additional, specific DNA contact. Our DNA-PK-nucleosome structure further reveals the opening of the Ku80 vWA domain, and we show that non-hydrolysable ATP promotes synapsis by stabilising the Ku80-mediated DNA-PK dimer. These structures reveal a model for DSB recognition on nucleosomal DNA and provide insights relevant to targeting NHEJ in cancer therapy. | |||||||||
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_52861.map.gz | 210.2 MB | EMDB map data format | |
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| Header (meta data) | emd-52861-v30.xml emd-52861.xml | 32.2 KB 32.2 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_52861_fsc.xml | 15.9 KB | Display | FSC data file |
| Images | emd_52861.png | 31.2 KB | ||
| Filedesc metadata | emd-52861.cif.gz | 8.3 KB | ||
| Others | emd_52861_additional_1.map.gz emd_52861_half_map_1.map.gz emd_52861_half_map_2.map.gz | 200.9 MB 391.1 MB 391.1 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-52861 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-52861 | HTTPS FTP |
-Validation report
| Summary document | emd_52861_validation.pdf.gz | 1.1 MB | Display | EMDB validaton report |
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| Full document | emd_52861_full_validation.pdf.gz | 1.1 MB | Display | |
| Data in XML | emd_52861_validation.xml.gz | 25.4 KB | Display | |
| Data in CIF | emd_52861_validation.cif.gz | 33 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-52861 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-52861 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 9igxMC ![]() 9igwC ![]() 9q80C ![]() 9q8xC ![]() 9q9fC ![]() 9qcrC ![]() 9qcsC ![]() 9qmsC M: atomic model generated by this map C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_52861.map.gz / Format: CCP4 / Size: 421.9 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Projections & slices | Image control
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| Voxel size | X=Y=Z: 0.824 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
-Additional map: #1
| File | emd_52861_additional_1.map | ||||||||||||
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-Half map: #2
| File | emd_52861_half_map_1.map | ||||||||||||
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-Half map: #1
| File | emd_52861_half_map_2.map | ||||||||||||
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| Density Histograms |
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Sample components
+Entire : 153 bp nucleosome bound to Ku70/80
+Supramolecule #1: 153 bp nucleosome bound to Ku70/80
+Macromolecule #1: X-ray repair cross-complementing protein 6
+Macromolecule #2: X-ray repair cross-complementing protein 5
+Macromolecule #3: Histone H2A type 1-B/E
+Macromolecule #4: Histone H2B type 1-J
+Macromolecule #5: Histone H3.1
+Macromolecule #6: Histone H4
+Macromolecule #7: X-ray repair cross-complementing protein 6
+Macromolecule #8: 153 bp DNA
+Macromolecule #9: 153 bp DNA
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Buffer | pH: 7.6 Component:
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| Grid | Model: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 300 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 30 sec. / Pretreatment - Atmosphere: AIR / Details: 30mA | |||||||||||||||||||||
| Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
| Microscope | TFS KRIOS |
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| Image recording | Film or detector model: GATAN K3 (6k x 4k) / Number real images: 10006 / Average electron dose: 50.01 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.2 µm / Nominal defocus min: 0.7000000000000001 µm / Nominal magnification: 105000 |
| Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
Movie
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About Yorodumi




Keywords
Homo sapiens (human)
Authors
Canada,
United Kingdom, 2 items
Citation































Z (Sec.)
Y (Row.)
X (Col.)














































Processing
FIELD EMISSION GUN


