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Yorodumi- EMDB-45807: The gap-filling complex with Pol mu engaged in the NHEJ pathway -
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Open data
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Basic information
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| Title | The gap-filling complex with Pol mu engaged in the NHEJ pathway | |||||||||
Map data | composite map for NHEJ gap-filling complex | |||||||||
Sample |
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Keywords | NHEJ / DNA gap / fill-in synthesis / ligation / XLF / PAXX / Polymerase mu / DNA repair / Ligase IV / LIGASE-TRANSFERASE-DNA complex | |||||||||
| Function / homology | Function and homology informationFHA domain binding / positive regulation of chromosome organization / positive regulation of ligase activity / DNA ligase IV complex / DNA ligase activity / DN2 thymocyte differentiation / DNA double-strand break attachment to nuclear envelope / DNA ligase (ATP) / Ku70:Ku80 complex / T cell receptor V(D)J recombination ...FHA domain binding / positive regulation of chromosome organization / positive regulation of ligase activity / DNA ligase IV complex / DNA ligase activity / DN2 thymocyte differentiation / DNA double-strand break attachment to nuclear envelope / DNA ligase (ATP) / Ku70:Ku80 complex / T cell receptor V(D)J recombination / negative regulation of t-circle formation / pro-B cell differentiation / DNA end binding / DNA ligase (ATP) activity / small-subunit processome assembly / positive regulation of lymphocyte differentiation / DNA-dependent protein kinase complex / DNA-dependent protein kinase-DNA ligase 4 complex / immunoglobulin V(D)J recombination / nonhomologous end joining complex / nucleotide-excision repair, DNA gap filling / single strand break repair / V(D)J recombination / regulation of smooth muscle cell proliferation / cellular response to X-ray / double-strand break repair via classical nonhomologous end joining / isotype switching / nuclear telomere cap complex / Cytosolic sensors of pathogen-associated DNA / protein localization to site of double-strand break / IRF3-mediated induction of type I IFN / recombinational repair / regulation of telomere maintenance / positive regulation of neurogenesis / U3 snoRNA binding / DNA biosynthetic process / protein localization to chromosome, telomeric region / cellular response to lithium ion / cellular hyperosmotic salinity response / 2-LTR circle formation / response to ionizing radiation / hematopoietic stem cell proliferation / ligase activity / telomeric DNA binding / DNA 3'-5' helicase / positive regulation of protein kinase activity / T cell differentiation / somatic stem cell population maintenance / 5'-deoxyribose-5-phosphate lyase activity / hematopoietic stem cell differentiation / response to X-ray / chromosome organization / ATP-dependent activity, acting on DNA / site of DNA damage / telomere maintenance via telomerase / SUMOylation of DNA damage response and repair proteins / somatic hypermutation of immunoglobulin genes / condensed chromosome / DNA polymerase binding / neurogenesis / activation of innate immune response / DNA helicase activity / telomere maintenance / B cell differentiation / cyclin binding / DNA-(apurinic or apyrimidinic site) lyase / central nervous system development / stem cell proliferation / cellular response to leukemia inhibitory factor / response to gamma radiation / cellular response to ionizing radiation / Nonhomologous End-Joining (NHEJ) / small-subunit processome / enzyme activator activity / protein-DNA complex / cellular response to gamma radiation / base-excision repair / double-strand break repair via nonhomologous end joining / establishment of integrated proviral latency / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / positive regulation of fibroblast proliferation / fibrillar center / T cell differentiation in thymus / double-strand break repair / site of double-strand break / neuron apoptotic process / double-stranded DNA binding / fibroblast proliferation / scaffold protein binding / secretory granule lumen / DNA recombination / transcription regulator complex / protein-macromolecule adaptor activity / DNA-directed DNA polymerase / ficolin-1-rich granule lumen / in utero embryonic development / negative regulation of neuron apoptotic process / molecular adaptor activity / damaged DNA binding / DNA-directed DNA polymerase activity Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 2.8 Å | |||||||||
Authors | Li J / Liu L / Gellert M / Yang W | |||||||||
| Funding support | United States, 1 items
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Citation | Journal: Nature / Year: 2025Title: Dynamic assemblies and coordinated reactions of non-homologous end joining. Authors: Lan Liu / Jun Li / Metztli Cisneros-Aguirre / Arianna Merkell / Jeremy M Stark / Martin Gellert / Wei Yang / ![]() Abstract: Non-homologous end joining (NHEJ) is the main repair pathway of double-strand DNA breaks in higher eukaryotes. Here we report reconstitution of the final steps of NHEJ and structures of DNA ...Non-homologous end joining (NHEJ) is the main repair pathway of double-strand DNA breaks in higher eukaryotes. Here we report reconstitution of the final steps of NHEJ and structures of DNA polymerase μ and ligase IV (LIG4) engaged in gap filling and end joining. These reactions take place in a flexible ω-shaped framework composed of XRCC4 and XLF. Two broken DNA ends, each encircled by Ku70-Ku80 internally, are docked onto the ω frame, mediated by LIG4. DNA polymerase and ligase attached to each ω arm repair only one broken strand of a defined polarity; the final steps of NHEJ requires coordination and toggling of a pair of such enzymes. The facilitators XLF and PAXX additively stimulate NHEJ reactions. As DNA-end sensor and protector, LIG4 replaces DNA-PKcs for end joining and bridges the two DNA ends for polymerase to fill remaining gaps. These assemblies present new targets for NHEJ inhibition to enhance efficacy of radiotherapy and accuracy of gene editing. | |||||||||
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_45807.map.gz | 242.1 MB | EMDB map data format | |
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| Header (meta data) | emd-45807-v30.xml emd-45807.xml | 40.2 KB 40.2 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_45807_fsc.xml | 18.2 KB | Display | FSC data file |
| Images | emd_45807.png | 127.6 KB | ||
| Masks | emd_45807_msk_1.map | 512 MB | Mask map | |
| Filedesc metadata | emd-45807.cif.gz | 9.9 KB | ||
| Others | emd_45807_additional_1.map.gz emd_45807_additional_2.map.gz emd_45807_half_map_1.map.gz emd_45807_half_map_2.map.gz | 459.5 MB 454.2 MB 242.6 MB 242.6 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-45807 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-45807 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 9cq3MC ![]() 9cq6C ![]() 9cqcC ![]() 9n81C ![]() 9n82C ![]() 9n83C C: citing same article ( M: atomic model generated by this map |
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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_45807.map.gz / Format: CCP4 / Size: 512 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Annotation | composite map for NHEJ gap-filling complex | ||||||||||||||||||||||||||||||||||||
| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 0.833 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
-Mask #1
| File | emd_45807_msk_1.map | ||||||||||||
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-Additional map: Postprocessed (by RELION) map for model building and validation
| File | emd_45807_additional_1.map | ||||||||||||
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| Annotation | Postprocessed (by RELION) map for model building and validation | ||||||||||||
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| Density Histograms |
-Additional map: DeepEMhancer sharpened map for model building
| File | emd_45807_additional_2.map | ||||||||||||
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| Annotation | DeepEMhancer sharpened map for model building | ||||||||||||
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| Density Histograms |
-Half map: half 1 map
| File | emd_45807_half_map_1.map | ||||||||||||
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| Annotation | half 1 map | ||||||||||||
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| Density Histograms |
-Half map: half 2 map
| File | emd_45807_half_map_2.map | ||||||||||||
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| Annotation | half 2 map | ||||||||||||
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| Density Histograms |
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Sample components
+Entire : A gap-filling complex with Pol mu engaged
+Supramolecule #1: A gap-filling complex with Pol mu engaged
+Macromolecule #1: X-ray repair cross-complementing protein 6
+Macromolecule #2: X-ray repair cross-complementing protein 5
+Macromolecule #3: Non-homologous end-joining factor 1
+Macromolecule #4: DNA repair protein XRCC4
+Macromolecule #5: DNA ligase 4
+Macromolecule #6: Protein PAXX
+Macromolecule #11: DNA-directed DNA/RNA polymerase mu
+Macromolecule #7: DNA (38-MER)
+Macromolecule #8: DNA (42-MER)
+Macromolecule #9: DNA (34-MER)
+Macromolecule #10: DNA (37-MER)
+Macromolecule #12: MAGNESIUM ION
+Macromolecule #13: 2'-deoxy-5'-O-[(R)-hydroxy{[(R)-hydroxy(phosphonooxy)phosphoryl]a...
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Concentration | 0.35 mg/mL |
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| Buffer | pH: 7.9 |
| Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K |
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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: 54.4 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: 1.5 µm / Nominal defocus min: 0.5 µm |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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About Yorodumi



Keywords
Homo sapiens (human)
Authors
United States, 1 items
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Processing
FIELD EMISSION GUN


