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- PDB-8bh3: DNA-PK Ku80 mediated dimer bound to PAXX -

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Basic information

Entry
Database: PDB / ID: 8bh3
TitleDNA-PK Ku80 mediated dimer bound to PAXX
Components
  • (X-ray repair cross-complementing protein ...) x 2
  • DNA (25-MER)
  • DNA (26-MER)
  • DNA (27-MER)
  • DNA (28-MER)
  • DNA ligase 4
  • DNA repair protein XRCC4
  • DNA-dependent protein kinase catalytic subunit
  • Protein PAXX
KeywordsDNA BINDING PROTEIN / DNA-PK / DNA-PKcs / Ku70 / Ku80 / PAXX / NHEJ
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 / protein localization to site of double-strand break / DNA ligation / 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 / 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 / somatic stem cell population maintenance / site of DNA damage / ligase activity / Lyases; Carbon-oxygen lyases; Other carbon-oxygen lyases / enzyme activator activity / response to X-ray / 5'-deoxyribose-5-phosphate lyase activity / chromosome organization / hematopoietic stem cell differentiation / positive regulation of protein kinase activity / ectopic germ cell programmed cell death / ATP-dependent activity, acting on DNA / somitogenesis / DNA polymerase binding / 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 / activation of innate immune response / telomere maintenance / cellular response to leukemia inhibitory factor / neurogenesis / cyclin binding / small-subunit processome / positive regulation of translation / positive regulation of erythrocyte differentiation / negative regulation of protein phosphorylation / 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 / protein destabilization / protein modification process / cellular response to gamma radiation
Similarity search - Function
Protein PAXX / PAXX, PAralog of XRCC4 and XLF, also called C9orf142 / 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 ...Protein PAXX / PAXX, PAralog of XRCC4 and XLF, also called C9orf142 / 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 / DNA repair protein XRCC4-like, C-terminal / SAP motif profile. / Putative DNA-binding (bihelical) motif predicted to be involved in chromosomal organisation / SAP domain / 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 / Protein PAXX
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.55 Å
AuthorsHardwick, S.W. / Chaplin, A.K.
Funding support United Kingdom, 1items
OrganizationGrant numberCountry
Wellcome Trust United Kingdom
CitationJournal: Sci Adv / Year: 2023
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.
History
DepositionOct 28, 2022Deposition site: PDBE / Processing site: PDBE
Revision 1.0Jun 7, 2023Provider: repository / Type: Initial release
Revision 1.1Jun 14, 2023Group: Source and taxonomy / Structure summary
Category: em_entity_assembly / em_entity_assembly_recombinant ...em_entity_assembly / em_entity_assembly_recombinant / entity_src_gen / pdbx_entity_src_syn
Item: _em_entity_assembly.source / _entity_src_gen.pdbx_host_org_ncbi_taxonomy_id ..._em_entity_assembly.source / _entity_src_gen.pdbx_host_org_ncbi_taxonomy_id / _entity_src_gen.pdbx_host_org_scientific_name / _pdbx_entity_src_syn.organism_common_name

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: DNA-dependent protein kinase catalytic subunit
B: X-ray repair cross-complementing protein 6
C: X-ray repair cross-complementing protein 5
D: Protein PAXX
G: DNA repair protein XRCC4
H: DNA repair protein XRCC4
I: DNA ligase 4
L: X-ray repair cross-complementing protein 5
M: Protein PAXX
P: DNA repair protein XRCC4
Q: DNA repair protein XRCC4
R: DNA ligase 4
S: DNA-dependent protein kinase catalytic subunit
T: X-ray repair cross-complementing protein 6
j: DNA (25-MER)
i: DNA (27-MER)
d: DNA (26-MER)
e: DNA (28-MER)


Theoretical massNumber of molelcules
Total (without water)1,682,46818
Polymers1,682,46818
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area77040 Å2
ΔGint-421 kcal/mol
Surface area525350 Å2
MethodPISA

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Components

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Protein , 4 types, 10 molecules ASDMGHPQIR

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


Mass: 469673.219 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human)
References: UniProt: P78527, non-specific serine/threonine protein kinase
#4: Protein Protein PAXX / Paralog of XRCC4 and XLF / XRCC4-like small protein


Mass: 21663.498 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PAXX, C9orf142, XLS / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q9BUH6
#5: Protein
DNA repair protein XRCC4 / / X-ray repair cross-complementing protein 4


Mass: 38337.703 Da / Num. of mol.: 4
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.: 2
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, 4 molecules BTCL

#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.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: XRCC6, G22P1 / Production host: Spodoptera frugiperda (fall armyworm)
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.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: XRCC5, G22P2 / Production host: Spodoptera frugiperda (fall armyworm)
References: UniProt: P13010, Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement

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DNA chain , 4 types, 4 molecules jide

#7: DNA chain DNA (25-MER)


Mass: 7748.026 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Homo sapiens (human)
#8: DNA chain DNA (27-MER)


Mass: 8290.423 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Homo sapiens (human)
#9: DNA chain DNA (26-MER)


Mass: 8037.208 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Homo sapiens (human)
#10: DNA chain DNA (28-MER)


Mass: 8603.631 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

ComponentName: NHEJ supercomplex bound to PAXX / Type: COMPLEX / Entity ID: all / Source: MULTIPLE SOURCES
Molecular weightValue: 1.7 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm)
Buffer solutionpH: 8
SpecimenConc.: 3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid type: Quantifoil R1.2/1.3
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 / Nominal defocus max: 2500 nm / Nominal defocus min: 800 nm / Cs: 2.7 mm / C2 aperture diameter: 50 µm
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 52.1 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

Software
NameVersionClassification
phenix.real_space_refinedev_4761refinement
PHENIXdev_4761refinement
EM software
IDNameCategory
1Warpparticle selection
2EPUimage acquisition
4WarpCTF correction
7UCSF Chimeramodel fitting
9cryoSPARCinitial Euler assignment
10cryoSPARCfinal Euler assignment
11cryoSPARCclassification
12cryoSPARC3D reconstruction
13PHENIXmodel refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 327163
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 4.55 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 35211 / Symmetry type: POINT
RefinementCross valid method: NONE
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
Displacement parametersBiso mean: 707.18 Å2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.002891295
ELECTRON MICROSCOPYf_angle_d0.617123842
ELECTRON MICROSCOPYf_chiral_restr0.040614045
ELECTRON MICROSCOPYf_plane_restr0.004215493
ELECTRON MICROSCOPYf_dihedral_angle_d15.697934232

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