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- EMDB-13443: DNA-PK in complex with ATPgammaS -

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Basic information

Entry
Database: EMDB / ID: EMD-13443
TitleDNA-PK in complex with ATPgammaS
Map data
Sample
  • Complex: Holoenzyme of DNA-PK, including DNA-PKcs and Ku70/80 heterodimer, in complex with ATPgammaS
Function / homology
Function and homology information


positive regulation of platelet formation / T cell receptor V(D)J recombination / pro-B cell differentiation / small-subunit processome assembly / positive regulation of lymphocyte differentiation / DNA-dependent protein kinase activity / histone H2AXS139 kinase activity / DNA-dependent protein kinase complex / immature B cell differentiation / DNA-dependent protein kinase-DNA ligase 4 complex ...positive regulation of platelet formation / T cell receptor V(D)J recombination / pro-B cell differentiation / small-subunit processome assembly / positive regulation of lymphocyte differentiation / DNA-dependent protein kinase activity / histone H2AXS139 kinase activity / DNA-dependent protein kinase complex / immature B cell differentiation / DNA-dependent protein kinase-DNA ligase 4 complex / immunoglobulin V(D)J recombination / nonhomologous end joining complex / regulation of smooth muscle cell proliferation / double-strand break repair via alternative nonhomologous end joining / Cytosolic sensors of pathogen-associated DNA / regulation of epithelial cell proliferation / IRF3-mediated induction of type I IFN / telomere capping / U3 snoRNA binding / regulation of hematopoietic stem cell differentiation / maturation of 5.8S rRNA / T cell lineage commitment / negative regulation of cGAS/STING signaling pathway / B cell lineage commitment / positive regulation of double-strand break repair via nonhomologous end joining / ectopic germ cell programmed cell death / somitogenesis / mitotic G1 DNA damage checkpoint signaling / telomere maintenance / activation of innate immune response / small-subunit processome / positive regulation of translation / negative regulation of protein phosphorylation / positive regulation of erythrocyte differentiation / protein-DNA complex / response to gamma radiation / Nonhomologous End-Joining (NHEJ) / brain development / peptidyl-threonine phosphorylation / protein modification process / protein destabilization / regulation of circadian rhythm / double-strand break repair via nonhomologous end joining / cellular response to insulin stimulus / rhythmic process / intrinsic apoptotic signaling pathway in response to DNA damage / double-strand break repair / E3 ubiquitin ligases ubiquitinate target proteins / T cell differentiation in thymus / heart development / double-stranded DNA binding / peptidyl-serine phosphorylation / transcription regulator complex / RNA polymerase II-specific DNA-binding transcription factor binding / chromosome, telomeric region / non-specific serine/threonine protein kinase / protein kinase activity / positive regulation of apoptotic process / protein domain specific binding / protein phosphorylation / protein serine kinase activity / innate immune response / protein serine/threonine kinase activity / DNA damage response / chromatin / nucleolus / negative regulation of apoptotic process / enzyme binding / positive regulation of transcription by RNA polymerase II / protein-containing complex / RNA binding / nucleoplasm / ATP binding / membrane / nucleus / cytosol
Similarity search - Function
DNA-dependent protein kinase catalytic subunit, CC3 / DNA-dependent protein kinase catalytic subunit, catalytic domain / DNA-dependent protein kinase catalytic subunit, CC5 / DNA-dependent protein kinase catalytic subunit, CC1/2 / DNA-PKcs, N-terminal / DNA-dependent protein kinase catalytic subunit, CC3 / DNA-PKcs, CC5 / DNA-PKcs, N-terminal / DNA-dependent protein kinase catalytic subunit, CC1/2 / NUC194 ...DNA-dependent protein kinase catalytic subunit, CC3 / DNA-dependent protein kinase catalytic subunit, catalytic domain / DNA-dependent protein kinase catalytic subunit, CC5 / DNA-dependent protein kinase catalytic subunit, CC1/2 / DNA-PKcs, N-terminal / DNA-dependent protein kinase catalytic subunit, CC3 / DNA-PKcs, CC5 / DNA-PKcs, N-terminal / DNA-dependent protein kinase catalytic subunit, CC1/2 / NUC194 / PIK-related kinase, FAT / FAT domain / FATC domain / FATC / FATC domain / PIK-related kinase / FAT domain profile. / FATC domain profile. / Phosphatidylinositol 3- and 4-kinases signature 1. / Phosphatidylinositol 3/4-kinase, conserved site / Phosphatidylinositol 3- and 4-kinases signature 2. / Phosphatidylinositol 3-/4-kinase, catalytic domain superfamily / Phosphoinositide 3-kinase, catalytic domain / Phosphatidylinositol 3- and 4-kinase / Phosphatidylinositol 3- and 4-kinases catalytic domain profile. / Phosphatidylinositol 3-/4-kinase, catalytic domain / Armadillo-like helical / Armadillo-type fold / Protein kinase-like domain superfamily
Similarity search - Domain/homology
DNA-dependent protein kinase catalytic subunit
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.3 Å
AuthorsLiang S / Blundell TL
Funding support United Kingdom, 1 items
OrganizationGrant numberCountry
Wellcome Trust United Kingdom
CitationJournal: Nature / Year: 2022
Title: Structural insights into inhibitor regulation of the DNA repair protein DNA-PKcs.
Authors: Shikang Liang / Sherine E Thomas / Amanda K Chaplin / Steven W Hardwick / Dimitri Y Chirgadze / Tom L Blundell /
Abstract: The DNA-dependent protein kinase catalytic subunit (DNA-PKcs) has a central role in non-homologous end joining, one of the two main pathways that detect and repair DNA double-strand breaks (DSBs) in ...The DNA-dependent protein kinase catalytic subunit (DNA-PKcs) has a central role in non-homologous end joining, one of the two main pathways that detect and repair DNA double-strand breaks (DSBs) in humans. DNA-PKcs is of great importance in repairing pathological DSBs, making DNA-PKcs inhibitors attractive therapeutic agents for cancer in combination with DSB-inducing radiotherapy and chemotherapy. Many of the selective inhibitors of DNA-PKcs that have been developed exhibit potential as treatment for various cancers. Here we report cryo-electron microscopy (cryo-EM) structures of human DNA-PKcs natively purified from HeLa cell nuclear extracts, in complex with adenosine-5'-(γ-thio)-triphosphate (ATPγS) and four inhibitors (wortmannin, NU7441, AZD7648 and M3814), including drug candidates undergoing clinical trials. The structures reveal molecular details of ATP binding at the active site before catalysis and provide insights into the modes of action and specificities of the competitive inhibitors. Of note, binding of the ligands causes movement of the PIKK regulatory domain (PRD), revealing a connection between the p-loop and PRD conformations. Electrophoretic mobility shift assay and cryo-EM studies on the DNA-dependent protein kinase holoenzyme further show that ligand binding does not have a negative allosteric or inhibitory effect on assembly of the holoenzyme complex and that inhibitors function through direct competition with ATP. Overall, the structures described in this study should greatly assist future efforts in rational drug design targeting DNA-PKcs, demonstrating the potential of cryo-EM in structure-guided drug development for large and challenging targets.
History
DepositionAug 20, 2021-
Header (metadata) releaseFeb 2, 2022-
Map releaseFeb 2, 2022-
UpdateFeb 16, 2022-
Current statusFeb 16, 2022Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.4
  • Imaged by UCSF Chimera
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  • Surface view colored by radius
  • Surface level: 0.4
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_13443.png

Downloads & links

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Map

FileDownload / File: emd_13443.map.gz / Format: CCP4 / Size: 163.6 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 1.304 Å
Density
Contour LevelBy AUTHOR: 0.306 / Movie #1: 0.4
Minimum - Maximum-0.23826197 - 1.253428
Average (Standard dev.)0.002443204 (±0.043795336)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions350350350
Spacing350350350
CellA=B=C: 456.4 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.3041.3041.304
M x/y/z350350350
origin x/y/z0.0000.0000.000
length x/y/z456.400456.400456.400
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS350350350
D min/max/mean-0.2381.2530.002

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Supplemental data

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Sample components

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Entire : Holoenzyme of DNA-PK, including DNA-PKcs and Ku70/80 heterodimer,...

EntireName: Holoenzyme of DNA-PK, including DNA-PKcs and Ku70/80 heterodimer, in complex with ATPgammaS
Components
  • Complex: Holoenzyme of DNA-PK, including DNA-PKcs and Ku70/80 heterodimer, in complex with ATPgammaS

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Supramolecule #1: Holoenzyme of DNA-PK, including DNA-PKcs and Ku70/80 heterodimer,...

SupramoleculeName: Holoenzyme of DNA-PK, including DNA-PKcs and Ku70/80 heterodimer, in complex with ATPgammaS
type: complex / ID: 1 / Parent: 0
Source (natural)Organism: Homo sapiens (human)
Molecular weightExperimental: 660 KDa

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 47.9 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
Final reconstructionResolution.type: BY AUTHOR / Resolution: 4.3 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 18758

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