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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 informationT cell receptor V(D)J recombination / FHA domain binding / positive regulation of chromosome organization / pro-B cell differentiation / positive regulation of ligase activity / DNA ligase IV complex / DNA ligase activity / DNA-dependent protein kinase complex / DNA double-strand break attachment to nuclear envelope / Ku70:Ku80 complex ...T cell receptor V(D)J recombination / FHA domain binding / positive regulation of chromosome organization / pro-B cell differentiation / positive regulation of ligase activity / DNA ligase IV complex / DNA ligase activity / DNA-dependent protein kinase complex / DNA double-strand break attachment to nuclear envelope / Ku70:Ku80 complex / DNA ligase (ATP) / negative regulation of t-circle formation / DNA end binding / DNA ligase (ATP) activity / small-subunit processome assembly / positive regulation of lymphocyte differentiation / DNA-dependent protein kinase-DNA ligase 4 complex / immunoglobulin V(D)J recombination / nonhomologous end joining complex / nucleotide-excision repair, DNA gap filling / cellular response to X-ray / cellular response to lithium ion / V(D)J recombination / isotype switching / regulation of smooth muscle cell proliferation / double-strand break repair via classical nonhomologous end joining / Cytosolic sensors of pathogen-associated DNA / protein localization to site of double-strand break / nuclear telomere cap complex / single strand break repair / IRF3-mediated induction of type I IFN / U3 snoRNA binding / positive regulation of neurogenesis / regulation of telomere maintenance / recombinational repair / cellular hyperosmotic salinity response / protein localization to chromosome, telomeric region / somatic stem cell population maintenance / 2-LTR circle formation / DNA biosynthetic process / response to ionizing radiation / telomeric repeat DNA binding / ligase activity / T cell differentiation / DNA 3'-5' helicase / 5'-deoxyribose-5-phosphate lyase activity / chromosome organization / response to X-ray / 3'-5' DNA helicase activity / somatic hypermutation of immunoglobulin genes / ATP-dependent activity, acting on DNA / telomere maintenance via telomerase / SUMOylation of DNA damage response and repair proteins / condensed chromosome / site of DNA damage / DNA polymerase binding / B cell differentiation / activation of innate immune response / response to gamma radiation / telomere maintenance / cyclin binding / DNA helicase activity / DNA-(apurinic or apyrimidinic site) lyase / class I DNA-(apurinic or apyrimidinic site) endonuclease activity / cellular response to ionizing radiation / central nervous system development / Nonhomologous End-Joining (NHEJ) / small-subunit processome / cellular response to gamma radiation / protein-DNA complex / base-excision repair / establishment of integrated proviral latency / cell population proliferation / double-strand break repair via nonhomologous end joining / positive regulation of fibroblast proliferation / fibrillar center / enzyme activator activity / T cell differentiation in thymus / in utero embryonic development / neuron apoptotic process / double-strand break repair / site of double-strand break / transcription regulator complex / scaffold protein binding / double-stranded DNA binding / DNA recombination / secretory granule lumen / DNA-directed DNA polymerase / negative regulation of neuron apoptotic process / molecular adaptor activity / ficolin-1-rich granule lumen / damaged DNA binding / DNA-directed DNA polymerase activity / protein-macromolecule adaptor activity / chromosome, telomeric region / transcription cis-regulatory region binding / ribonucleoprotein complex / innate immune response / cell division / negative regulation of DNA-templated transcription 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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| Density Histograms |
-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 | ||||||||||||
| Projections & Slices |
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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


