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- PDB-7nfe: Cryo-EM structure of NHEJ super-complex (monomer) -

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Entry
Database: PDB / ID: 7nfe
TitleCryo-EM structure of NHEJ super-complex (monomer)
Components
  • (X-ray repair cross-complementing protein ...) x 2
  • DNA (5'-D(P*AP*AP*TP*AP*AP*AP*CP*TP*AP*AP*AP*AP*AP*CP*TP*AP*TP*TP*AP*TP*TP*AP*TP*G)-3')
  • DNA (5'-D(P*TP*AP*AP*TP*AP*AP*TP*AP*GP*TP*TP*TP*TP*TP*AP*GP*TP*TP*TP*AP*TP*TP*AP*G)-3')
  • DNA ligase 4
  • DNA repair protein XRCC4
  • DNA-dependent protein kinase catalytic subunit,DNA-dependent protein kinase catalytic subunit,DNA-dependent protein kinase catalytic subunit
  • Non-homologous end-joining factor 1
KeywordsDNA BINDING PROTEIN / NHEJ / DNA-PKcs / Ku70/80 / XLF / XRCC4 / DNA-LigaseIV
Function / homology
Function and homology information


DNA ligation involved in DNA recombination / FHA domain binding / positive regulation of chromosome organization / positive regulation of ligase activity / DNA ligase IV complex / DNA ligation involved in DNA repair / DNA ligase activity / Ku70:Ku80 complex / DN2 thymocyte differentiation / negative regulation of t-circle formation ...DNA ligation involved in DNA recombination / FHA domain binding / positive regulation of chromosome organization / positive regulation of ligase activity / DNA ligase IV complex / DNA ligation involved in DNA repair / DNA ligase activity / Ku70:Ku80 complex / DN2 thymocyte differentiation / negative regulation of t-circle formation / positive regulation of platelet formation / DNA ligase (ATP) / DNA end binding / T cell receptor V(D)J recombination / pro-B cell differentiation / DNA ligase (ATP) activity / 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 / nucleotide-excision repair, DNA gap filling / DNA-dependent protein kinase-DNA ligase 4 complex / single strand break repair / cellular response to X-ray / immunoglobulin V(D)J recombination / nonhomologous end joining complex / DNA ligation / protein localization to site of double-strand break / nuclear telomere cap complex / regulation of smooth muscle cell proliferation / V(D)J recombination / double-strand break repair via alternative nonhomologous end joining / isotype switching / Cytosolic sensors of pathogen-associated DNA / double-strand break repair via classical nonhomologous end joining / regulation of epithelial cell proliferation / IRF3-mediated induction of type I IFN / telomere capping / recombinational repair / regulation of telomere maintenance / U3 snoRNA binding / regulation of hematopoietic stem cell differentiation / positive regulation of neurogenesis / protein localization to chromosome, telomeric region / cellular response to fatty acid / hematopoietic stem cell proliferation / cellular hyperosmotic salinity response / maturation of 5.8S rRNA / response to ionizing radiation / T cell lineage commitment / negative regulation of cGAS/STING signaling pathway / telomeric DNA binding / DNA biosynthetic process / positive regulation of catalytic activity / B cell lineage commitment / cellular response to lithium ion / 2-LTR circle formation / positive regulation of double-strand break repair via nonhomologous end joining / site of DNA damage / somatic stem cell population maintenance / ligase activity / Lyases; Carbon-oxygen lyases; Other carbon-oxygen lyases / enzyme activator activity / 5'-deoxyribose-5-phosphate lyase activity / T cell differentiation / response to X-ray / chromosome organization / hematopoietic stem cell differentiation / positive regulation of protein kinase activity / ectopic germ cell programmed cell death / ATP-dependent activity, acting on DNA / DNA polymerase binding / somitogenesis / SUMOylation of DNA damage response and repair proteins / condensed chromosome / positive regulation of telomerase activity / mitotic G1 DNA damage checkpoint signaling / positive regulation of telomere maintenance via telomerase / DNA helicase activity / telomere maintenance / activation of innate immune response / cellular response to leukemia inhibitory factor / small-subunit processome / neurogenesis / cyclin binding / B cell differentiation / negative regulation of protein phosphorylation / positive regulation of erythrocyte differentiation / positive regulation of translation / central nervous system development / stem cell proliferation / cellular response to ionizing radiation / protein-DNA complex / response to gamma radiation / Nonhomologous End-Joining (NHEJ) / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / brain development / peptidyl-threonine phosphorylation
Similarity search - Function
XLF, N-terminal / XLF-Cernunnos, XRcc4-like factor, NHEJ component / DNA ligase IV domain / DNA ligase IV / DNA ligase 4 / DNA Ligase 4, adenylation domain / XRCC4, N-terminal domain superfamily / DNA repair protein XRCC4 / DNA double-strand break repair and V(D)J recombination protein XRCC4 / XRCC4-like, N-terminal domain superfamily ...XLF, N-terminal / XLF-Cernunnos, XRcc4-like factor, NHEJ component / DNA ligase IV domain / DNA ligase IV / DNA ligase 4 / DNA Ligase 4, adenylation domain / XRCC4, N-terminal domain superfamily / DNA repair protein XRCC4 / DNA double-strand break repair and V(D)J recombination protein XRCC4 / XRCC4-like, N-terminal domain superfamily / Ku70, bridge and pillars domain superfamily / : / Ku70 / Ku, C-terminal / Ku, C-terminal domain superfamily / Ku C terminal domain like / DNA ligase, ATP-dependent / DNA ligase, ATP-dependent, N-terminal / Ku80 / DNA ligase, ATP-dependent, N-terminal domain superfamily / DNA ligase N terminus / Ku70/Ku80 C-terminal arm / Ku70/Ku80, N-terminal alpha/beta / Ku70/Ku80 beta-barrel domain / Ku70/Ku80 C-terminal arm / Ku70/Ku80 N-terminal alpha/beta domain / Ku70 and Ku80 are 70kDa and 80kDa subunits of the Lupus Ku autoantigen / Ku70/Ku80 beta-barrel domain / DNA-dependent protein kinase catalytic subunit, CC3 / SPOC-like, C-terminal domain superfamily / 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 / ATP-dependent DNA ligase signature 2. / ATP-dependent DNA ligase AMP-binding site. / DNA ligase, ATP-dependent, C-terminal / ATP dependent DNA ligase C terminal region / DNA ligase, ATP-dependent, conserved site / ATP-dependent DNA ligase family profile. / DNA ligase, ATP-dependent, central / ATP dependent DNA ligase domain / SAP domain superfamily / SAP domain / SAP motif profile. / Putative DNA-binding (bihelical) motif predicted to be involved in chromosomal organisation / SAP domain / DNA repair protein XRCC4-like, C-terminal / PIK-related kinase, FAT / FAT domain / FATC domain / FATC / FATC domain / PIK-related kinase / FAT domain profile. / FATC domain profile. / BRCA1 C Terminus (BRCT) domain / Phosphatidylinositol 3- and 4-kinases signature 1. / breast cancer carboxy-terminal domain / 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. / von Willebrand factor (vWF) type A domain / Phosphatidylinositol 3-/4-kinase, catalytic domain / von Willebrand factor, type A / BRCT domain profile. / BRCT domain / BRCT domain superfamily / von Willebrand factor A-like domain superfamily / Armadillo-like helical / Armadillo-type fold / Nucleic acid-binding, OB-fold / Protein kinase-like domain superfamily
Similarity search - Domain/homology
DNA / DNA (> 10) / X-ray repair cross-complementing protein 6 / X-ray repair cross-complementing protein 5 / DNA ligase 4 / DNA-dependent protein kinase catalytic subunit / DNA repair protein XRCC4 / Non-homologous end-joining factor 1
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.29 Å
AuthorsChaplin, A.K. / Hardwick, S.W. / Kefala Stavridi, A. / Chirgadze, D.Y. / Blundell, T.L.
Funding support United Kingdom, 1items
OrganizationGrant numberCountry
Wellcome Trust200814/Z/16/Z; 2016 United Kingdom
CitationJournal: Mol Cell / Year: 2021
Title: Cryo-EM of NHEJ supercomplexes provides insights into DNA repair.
Authors: Amanda K Chaplin / Steven W Hardwick / Antonia Kefala Stavridi / Christopher J Buehl / Noah J Goff / Virginie Ropars / Shikang Liang / Taiana Maia De Oliveira / Dimitri Y Chirgadze / ...Authors: Amanda K Chaplin / Steven W Hardwick / Antonia Kefala Stavridi / Christopher J Buehl / Noah J Goff / Virginie Ropars / Shikang Liang / Taiana Maia De Oliveira / Dimitri Y Chirgadze / Katheryn Meek / Jean-Baptiste Charbonnier / Tom L Blundell /
Abstract: Non-homologous end joining (NHEJ) is one of two critical mechanisms utilized in humans to repair DNA double-strand breaks (DSBs). Unrepaired or incorrect repair of DSBs can lead to apoptosis or ...Non-homologous end joining (NHEJ) is one of two critical mechanisms utilized in humans to repair DNA double-strand breaks (DSBs). Unrepaired or incorrect repair of DSBs can lead to apoptosis or cancer. NHEJ involves several proteins, including the Ku70/80 heterodimer, DNA-dependent protein kinase catalytic subunit (DNA-PKcs), X-ray cross-complementing protein 4 (XRCC4), XRCC4-like factor (XLF), and ligase IV. These core proteins bind DSBs and ligate the damaged DNA ends. However, details of the structural assembly of these proteins remain unclear. Here, we present cryo-EM structures of NHEJ supercomplexes that are composed of these core proteins and DNA, revealing the detailed structural architecture of this assembly. We describe monomeric and dimeric forms of this supercomplex and also propose the existence of alternate dimeric forms of long-range synaptic complexes. Finally, we show that mutational disruption of several structural features within these NHEJ complexes negatively affects DNA repair.
History
DepositionFeb 6, 2021Deposition site: PDBE / Processing site: PDBE
Revision 1.0Aug 18, 2021Provider: repository / Type: Initial release
Revision 1.1Sep 22, 2021Group: Data collection / Database references
Category: citation / database_PDB_rev ...citation / database_PDB_rev / database_PDB_rev_record / em_admin / pdbx_database_proc / pdbx_seq_map_depositor_info
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _em_admin.last_update / _pdbx_seq_map_depositor_info.one_letter_code_mod

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Structure visualization

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Assembly

Deposited unit
A: DNA-dependent protein kinase catalytic subunit,DNA-dependent protein kinase catalytic subunit,DNA-dependent protein kinase catalytic subunit
B: X-ray repair cross-complementing protein 6
C: X-ray repair cross-complementing protein 5
F: Non-homologous end-joining factor 1
G: Non-homologous end-joining factor 1
H: DNA repair protein XRCC4
I: DNA repair protein XRCC4
J: DNA ligase 4
D: DNA (5'-D(P*AP*AP*TP*AP*AP*AP*CP*TP*AP*AP*AP*AP*AP*CP*TP*AP*TP*TP*AP*TP*TP*AP*TP*G)-3')
E: DNA (5'-D(P*TP*AP*AP*TP*AP*AP*TP*AP*GP*TP*TP*TP*TP*TP*AP*GP*TP*TP*TP*AP*TP*TP*AP*G)-3')


Theoretical massNumber of molelcules
Total (without water)887,12910
Polymers887,12910
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area44390 Å2
ΔGint-294 kcal/mol
Surface area252540 Å2

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Components

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Protein , 4 types, 6 molecules AFGHIJ

#1: Protein DNA-dependent protein kinase catalytic subunit,DNA-dependent protein kinase catalytic subunit,DNA-dependent protein kinase catalytic subunit / DNA-PK catalytic subunit / DNA-PKcs / DNPK1 / p460


Mass: 472056.281 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HELA
References: UniProt: P78527, non-specific serine/threonine protein kinase
#4: Protein Non-homologous end-joining factor 1 / Protein cernunnos / XRCC4-like factor


Mass: 33372.234 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: NHEJ1, XLF / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q9H9Q4
#5: Protein DNA repair protein XRCC4 / / X-ray repair cross-complementing protein 4


Mass: 38337.703 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: XRCC4 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q13426
#6: Protein DNA ligase 4 / / DNA ligase IV / Polydeoxyribonucleotide synthase [ATP] 4


Mass: 104124.953 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: LIG4 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: P49917, DNA ligase (ATP)

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X-ray repair cross-complementing protein ... , 2 types, 2 molecules BC

#2: Protein X-ray repair cross-complementing protein 6 / 5'-deoxyribose-5-phosphate lyase Ku70 / 5'-dRP lyase Ku70 / 70 kDa subunit of Ku antigen / ATP- ...5'-deoxyribose-5-phosphate lyase Ku70 / 5'-dRP lyase Ku70 / 70 kDa subunit of Ku antigen / ATP-dependent DNA helicase 2 subunit 1 / ATP-dependent DNA helicase II 70 kDa subunit / CTC box-binding factor 75 kDa subunit / CTCBF / DNA repair protein XRCC6 / Lupus Ku autoantigen protein p70 / Ku70 / Thyroid-lupus autoantigen / TLAA / X-ray repair complementing defective repair in Chinese hamster cells 6


Mass: 69945.039 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: XRCC6, G22P1
Production host: Insect cell expression vector pTIE1 (others)
References: UniProt: P12956, Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement, Lyases; Carbon-oxygen lyases; Other carbon-oxygen lyases
#3: Protein X-ray repair cross-complementing protein 5 / 86 kDa subunit of Ku antigen / ATP-dependent DNA helicase 2 subunit 2 / ATP-dependent DNA helicase ...86 kDa subunit of Ku antigen / ATP-dependent DNA helicase 2 subunit 2 / ATP-dependent DNA helicase II 80 kDa subunit / CTC box-binding factor 85 kDa subunit / CTCBF / DNA repair protein XRCC5 / Ku80 / Ku86 / Lupus Ku autoantigen protein p86 / Nuclear factor IV / Thyroid-lupus autoantigen / TLAA / X-ray repair complementing defective repair in Chinese hamster cells 5 (double-strand-break rejoining)


Mass: 82812.438 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: XRCC5, G22P2
Production host: Insect cell expression vector pTIE1 (others)
References: UniProt: P13010, Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement

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DNA chain , 2 types, 2 molecules DE

#7: DNA chain DNA (5'-D(P*AP*AP*TP*AP*AP*AP*CP*TP*AP*AP*AP*AP*AP*CP*TP*AP*TP*TP*AP*TP*TP*AP*TP*G)-3')


Mass: 7367.843 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Homo sapiens (human)
#8: DNA chain DNA (5'-D(P*TP*AP*AP*TP*AP*AP*TP*AP*GP*TP*TP*TP*TP*TP*AP*GP*TP*TP*TP*AP*TP*TP*AP*G)-3')


Mass: 7402.821 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Homo sapiens (human)

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

Component
IDNameTypeEntity IDParent-IDSource
1NHEJ super-complex (monomer)ORGANELLE OR CELLULAR COMPONENTall0MULTIPLE SOURCES
2DNA-dependent protein kinase catalytic subunitORGANELLE OR CELLULAR COMPONENT#11NATURAL
3X-ray repair cross-complementing protein 6 and 5ORGANELLE OR CELLULAR COMPONENT#2-#31RECOMBINANT
4Non-homologous end-joining factor 1,DNA repair protein XRCC4, DNA ligase 4ORGANELLE OR CELLULAR COMPONENT#4-#61RECOMBINANT
5DNAORGANELLE OR CELLULAR COMPONENT#7-#81RECOMBINANT
Molecular weightValue: 0.8 MDa / Experimental value: NO
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
12Homo sapiens (human)9606
23Homo sapiens (human)9606
34Homo sapiens (human)9606
45Homo sapiens (human)9606
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
13Insect cell expression vector pTIE1 (others)266783
24Escherichia coli BL21(DE3) (bacteria)469008
35synthetic construct (others)32630
Buffer solutionpH: 7.4
SpecimenConc.: 3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal magnification: 130000 X / Cs: 2.7 mm / C2 aperture diameter: 50 µm
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 1.3 sec. / Electron dose: 46.8 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

Software
NameVersionClassification
phenix.real_space_refine1.19rc7_4070refinement
PHENIX1.19rc7_4070refinement
EM software
IDNameCategory
2EPUimage acquisition
4WarpCTF correction
9PHENIXmodel refinement
10cryoSPARCinitial Euler assignment
11cryoSPARCfinal Euler assignment
12cryoSPARCclassification
13cryoSPARC3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 749185
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 4.29 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 45943 / Symmetry type: POINT
RefinementCross valid method: NONE
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
Displacement parametersBiso mean: 358.24 Å2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.002445713
ELECTRON MICROSCOPYf_angle_d0.575862124
ELECTRON MICROSCOPYf_chiral_restr0.03927135
ELECTRON MICROSCOPYf_plane_restr0.00397799
ELECTRON MICROSCOPYf_dihedral_angle_d15.388116764

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