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Open data
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Basic information
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| Title | DNA-PK Ku80 mediated dimer bound to PAXX and XLF | |||||||||
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Keywords | DNA-PK / DNA-PKcs / Ku70 / Ku80 / PAXX / NHEJ / DNA BINDING PROTEIN / XLF | |||||||||
| Function / homology | Function and homology informationFHA domain binding / positive regulation of chromosome organization / positive regulation of ligase activity / DNA ligase IV complex / positive regulation of platelet formation / DNA ligase activity / Ku70:Ku80 complex / DN2 thymocyte differentiation / DNA ligase (ATP) / negative regulation of t-circle formation ...FHA domain binding / positive regulation of chromosome organization / positive regulation of ligase activity / DNA ligase IV complex / positive regulation of platelet formation / DNA ligase activity / Ku70:Ku80 complex / DN2 thymocyte differentiation / DNA ligase (ATP) / 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 ligase (ATP) activity / 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 / nucleotide-excision repair, DNA gap filling / immature B cell differentiation / single strand break repair / regulation of smooth muscle cell proliferation / cellular response to X-ray / V(D)J recombination / 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 / isotype switching / Cytosolic sensors of pathogen-associated DNA / protein localization to site of double-strand break / IRF3-mediated induction of type I IFN / regulation of hematopoietic stem cell differentiation / positive regulation of neurogenesis / recombinational repair / regulation of telomere maintenance / protein localization to chromosome, telomeric region / U3 snoRNA binding / DNA biosynthetic process / maturation of 5.8S rRNA / T cell lineage commitment / cellular response to lithium ion / cellular hyperosmotic salinity response / negative regulation of cGAS/STING signaling pathway / positive regulation of double-strand break repair via nonhomologous end joining / response to ionizing radiation / 2-LTR circle formation / B cell lineage commitment / telomeric DNA binding / hematopoietic stem cell proliferation / ligase activity / 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 / T cell differentiation / 5'-deoxyribose-5-phosphate lyase activity / somatic stem cell population maintenance / hematopoietic stem cell differentiation / response to X-ray / chromosome organization / ectopic germ cell programmed cell death / ATP-dependent activity, acting on DNA / telomere maintenance via telomerase / somitogenesis / SUMOylation of DNA damage response and repair proteins / condensed chromosome / DNA polymerase binding / 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 / B cell differentiation / central nervous system development / stem cell proliferation / response to gamma radiation / cellular response to ionizing radiation / small-subunit processome / Nonhomologous End-Joining (NHEJ) / enzyme activator activity / cellular response to gamma radiation / protein-DNA complex / base-excision repair / regulation of circadian rhythm / brain development / peptidyl-serine phosphorylation / protein destabilization / protein modification process / double-strand break repair via nonhomologous end joining Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 5.33 Å | |||||||||
Authors | Hardwick SW / Chaplin AK | |||||||||
| Funding support | United Kingdom, 1 items
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Citation | Journal: Sci Adv / Year: 2023Title: PAXX binding to the NHEJ machinery explains functional redundancy with XLF. Authors: Murielle Seif-El-Dahan / Antonia Kefala-Stavridi / Philippe Frit / Steven W Hardwick / Dima Y Chirgadze / Taiana Maia De Oliviera / Jessica Andreani / Sébastien Britton / Nadia Barboule / ...Authors: Murielle Seif-El-Dahan / Antonia Kefala-Stavridi / Philippe Frit / Steven W Hardwick / Dima Y Chirgadze / Taiana Maia De Oliviera / Jessica Andreani / Sébastien Britton / Nadia Barboule / Madeleine Bossaert / Arun Prasad Pandurangan / Katheryn Meek / Tom L Blundell / Virginie Ropars / Patrick Calsou / Jean-Baptiste Charbonnier / Amanda K Chaplin / ![]() Abstract: Nonhomologous end joining is a critical mechanism that repairs DNA double-strand breaks in human cells. In this work, we address the structural and functional role of the accessory protein PAXX ...Nonhomologous end joining is a critical mechanism that repairs DNA double-strand breaks in human cells. In this work, we address the structural and functional role of the accessory protein PAXX [paralog of x-ray repair cross-complementing protein 4 (XRCC4) and XRCC4-like factor (XLF)] in this mechanism. Here, we report high-resolution cryo-electron microscopy (cryo-EM) and x-ray crystallography structures of the PAXX C-terminal Ku-binding motif bound to Ku70/80 and cryo-EM structures of PAXX bound to two alternate DNA-dependent protein kinase (DNA-PK) end-bridging dimers, mediated by either Ku80 or XLF. We identify residues critical for the Ku70/PAXX interaction in vitro and in cells. We demonstrate that PAXX and XLF can bind simultaneously to the Ku heterodimer and act as structural bridges in alternate forms of DNA-PK dimers. Last, we show that engagement of both proteins provides a complementary advantage for DNA end synapsis and end joining in cells. | |||||||||
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_16074.map.gz | 498.2 MB | EMDB map data format | |
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| Header (meta data) | emd-16074-v30.xml emd-16074.xml | 34.6 KB 34.6 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_16074_fsc.xml | 17.3 KB | Display | FSC data file |
| Images | emd_16074.png | 59.3 KB | ||
| Filedesc metadata | emd-16074.cif.gz | 11.7 KB | ||
| Others | emd_16074_additional_1.map.gz emd_16074_half_map_1.map.gz emd_16074_half_map_2.map.gz | 498.3 MB 497.1 MB 497.1 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-16074 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-16074 | HTTPS FTP |
-Validation report
| Summary document | emd_16074_validation.pdf.gz | 1.1 MB | Display | EMDB validaton report |
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| Full document | emd_16074_full_validation.pdf.gz | 1.1 MB | Display | |
| Data in XML | emd_16074_validation.xml.gz | 26.4 KB | Display | |
| Data in CIF | emd_16074_validation.cif.gz | 34.8 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-16074 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-16074 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 8bhyMC ![]() 7zwaC ![]() 7zygC ![]() 8ascC ![]() 8bh3C ![]() 8bhvC 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_16074.map.gz / Format: CCP4 / Size: 536.4 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: 1.304 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
-Additional map: Locally refined composite map for presentation purposes
| File | emd_16074_additional_1.map | ||||||||||||
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| Annotation | Locally refined composite map for presentation purposes | ||||||||||||
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| Density Histograms |
-Half map: #2
| File | emd_16074_half_map_1.map | ||||||||||||
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| Density Histograms |
-Half map: #1
| File | emd_16074_half_map_2.map | ||||||||||||
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| Density Histograms |
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Sample components
+Entire : DNA-PK Ku80 mediated dimer bound to PAXX and XLF
+Supramolecule #1: DNA-PK Ku80 mediated dimer bound to PAXX and XLF
+Macromolecule #1: DNA-dependent protein kinase catalytic subunit
+Macromolecule #2: X-ray repair cross-complementing protein 6
+Macromolecule #3: X-ray repair cross-complementing protein 5
+Macromolecule #4: Protein PAXX
+Macromolecule #5: DNA repair protein XRCC4
+Macromolecule #6: DNA ligase 4
+Macromolecule #11: Non-homologous end-joining factor 1
+Macromolecule #7: DNA (25-MER)
+Macromolecule #8: DNA (27-MER)
+Macromolecule #9: DNA (26-MER)
+Macromolecule #10: DNA (5'-D(P*AP*AP*TP*AP*AP*TP*AP*GP*TP*TP*TP*TP*TP*AP*GP*TP*TP*TP...
-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: 8 |
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| Grid | Model: Quantifoil R1.2/1.3 / Pretreatment - Type: GLOW DISCHARGE |
| Vitrification | Cryogen name: ETHANE / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
| Microscope | FEI TITAN KRIOS |
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| Specialist optics | Energy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV |
| Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 48.03 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.4 µm / Nominal defocus min: 0.9 µm / Nominal magnification: 130000 |
| Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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About Yorodumi




Keywords
Homo sapiens (human)
Authors
United Kingdom, 1 items
Citation























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Y (Row.)
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Processing
FIELD EMISSION GUN


