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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 | |||||||||
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![]() | DNA-PK / DNA-PKcs / Ku70 / Ku80 / PAXX / NHEJ / DNA BINDING PROTEIN | |||||||||
Function / homology | ![]() : / FHA domain binding / positive regulation of chromosome organization / positive regulation of ligase activity / DNA ligase IV complex / : / DNA ligase activity / Ku70:Ku80 complex / DN2 thymocyte differentiation / positive regulation of platelet formation ...: / FHA domain binding / positive regulation of chromosome organization / positive regulation of ligase activity / DNA ligase IV complex / : / DNA ligase activity / Ku70:Ku80 complex / DN2 thymocyte differentiation / positive regulation of platelet formation / negative regulation of t-circle formation / DNA ligase (ATP) / DNA end binding / T cell receptor V(D)J recombination / pro-B cell differentiation / small-subunit processome assembly / positive regulation of lymphocyte differentiation / DNA ligase (ATP) 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 / nucleotide-excision repair, DNA gap filling / single strand break repair / : / regulation of smooth muscle cell proliferation / V(D)J recombination / 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 / isotype switching / protein localization to site of double-strand break / IRF3-mediated induction of type I IFN / telomere capping / regulation of epithelial cell proliferation / recombinational repair / regulation of hematopoietic stem cell differentiation / regulation of telomere maintenance / U3 snoRNA binding / protein localization to chromosome, telomeric region / cellular hyperosmotic salinity response / cellular response to fatty acid / positive regulation of neurogenesis / T cell lineage commitment / maturation of 5.8S rRNA / cellular response to lithium ion / DNA biosynthetic process / telomeric DNA binding / negative regulation of cGAS/STING signaling pathway / positive regulation of double-strand break repair via nonhomologous end joining / B cell lineage commitment / hematopoietic stem cell proliferation / 2-LTR circle formation / ligase activity / site of DNA damage / somatic stem cell population maintenance / Lyases; Carbon-oxygen lyases; Other carbon-oxygen lyases / 5'-deoxyribose-5-phosphate lyase activity / hematopoietic stem cell differentiation / ATP-dependent activity, acting on DNA / positive regulation of protein kinase activity / response to X-ray / chromosome organization / ectopic germ cell programmed cell death / telomere maintenance via telomerase / somitogenesis / SUMOylation of DNA damage response and repair proteins / negative regulation of protein phosphorylation / DNA helicase activity / condensed chromosome / DNA polymerase binding / mitotic G1 DNA damage checkpoint signaling / telomere maintenance / cyclin binding / activation of innate immune response / enzyme activator activity / cellular response to leukemia inhibitory factor / positive regulation of erythrocyte differentiation / positive regulation of translation / stem cell proliferation / central nervous system development / neurogenesis / cellular response to ionizing radiation / response to gamma radiation / small-subunit processome / peptidyl-threonine phosphorylation / Nonhomologous End-Joining (NHEJ) / protein-DNA complex / cellular response to gamma radiation / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / regulation of circadian rhythm / protein modification process / protein destabilization / brain development / double-strand break repair via nonhomologous end joining / establishment of integrated proviral latency / cellular response to insulin stimulus Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 4.55 Å | |||||||||
![]() | Hardwick SW / Chaplin AK | |||||||||
Funding support | ![]()
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![]() | ![]() Title: 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 | ![]() | 557.3 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 33 KB 33 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 24.8 KB | Display | ![]() |
Images | ![]() | 67.8 KB | ||
Filedesc metadata | ![]() | 11.4 KB | ||
Others | ![]() ![]() ![]() | 558.3 MB 557.4 MB 557.4 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 1 MB | Display | ![]() |
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Full document | ![]() | 1 MB | Display | |
Data in XML | ![]() | 26.6 KB | Display | |
Data in CIF | ![]() | 35.8 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8bh3MC ![]() 7zwaC ![]() 7zygC ![]() 8ascC ![]() 8bhvC ![]() 8bhyC M: atomic model generated by this map C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
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: Composite locally refined map
File | emd_16044_additional_1.map | ||||||||||||
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Annotation | Composite locally refined map | ||||||||||||
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Density Histograms |
-Half map: #2
File | emd_16044_half_map_1.map | ||||||||||||
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Density Histograms |
-Half map: #1
File | emd_16044_half_map_2.map | ||||||||||||
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Density Histograms |
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Sample components
+Entire : NHEJ supercomplex bound to PAXX
+Supramolecule #1: NHEJ supercomplex bound to PAXX
+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 #7: DNA (25-MER)
+Macromolecule #8: DNA (27-MER)
+Macromolecule #9: DNA (26-MER)
+Macromolecule #10: DNA (28-MER)
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 3 mg/mL |
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Buffer | pH: 8 |
Grid | Model: Quantifoil R1.2/1.3 / Pretreatment - Type: GLOW DISCHARGE |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 52.1 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | C2 aperture diameter: 50.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.5 µm / Nominal defocus min: 0.8 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 |