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- PDB-9zqb: Nucleosome with an SSB at SHL -2.8 in complex with human PARP2 an... -

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Basic information

Entry
Database: PDB / ID: 9zqb
TitleNucleosome with an SSB at SHL -2.8 in complex with human PARP2 and HPF1, Class 1
Components
  • DNA (128-MER)
  • DNA (197-MER)
  • DNA (69-MER)
  • Histone H2A
  • Histone H2B
  • Histone H3
  • Histone H4
  • Poly [ADP-ribose] polymerase 2
  • mAb PL2-6 antibody
KeywordsDNA BINDING PROTEIN/DNA / DNA damage binding protein / DNA BINDING PROTEIN / DNA BINDING PROTEIN-DNA complex
Function / homology
Function and homology information


HDMs demethylate histones / PKMTs methylate histone lysines / Interleukin-7 signaling / Chromatin modifying enzymes / : / SUMOylation of chromatin organization proteins / Metalloprotease DUBs / E3 ubiquitin ligases ubiquitinate target proteins / Factors involved in megakaryocyte development and platelet production / RCAF complex ...HDMs demethylate histones / PKMTs methylate histone lysines / Interleukin-7 signaling / Chromatin modifying enzymes / : / SUMOylation of chromatin organization proteins / Metalloprotease DUBs / E3 ubiquitin ligases ubiquitinate target proteins / Factors involved in megakaryocyte development and platelet production / RCAF complex / RMTs methylate histone arginines / Recruitment and ATM-mediated phosphorylation of repair and signaling proteins at DNA double strand breaks / SIRT1 negatively regulates rRNA expression / NoRC negatively regulates rRNA expression / Activated PKN1 stimulates transcription of AR (androgen receptor) regulated genes KLK2 and KLK3 / polytene chromosome band / Formation of the beta-catenin:TCF transactivating complex / Negative Regulation of CDH1 Gene Transcription / PRC2 methylates histones and DNA / HDACs deacetylate histones / Ub-specific processing proteases / MLL4 and MLL3 complexes regulate expression of PPARG target genes in adipogenesis and hepatic steatosis / RNA Polymerase I Promoter Escape / Regulation of endogenous retroelements by KRAB-ZFP proteins / larval somatic muscle development / RUNX1 regulates genes involved in megakaryocyte differentiation and platelet function / Senescence-Associated Secretory Phenotype (SASP) / Transcriptional regulation by small RNAs / Estrogen-dependent gene expression / HATs acetylate histones / response to oxygen-glucose deprivation / Assembly of the ORC complex at the origin of replication / Oxidative Stress Induced Senescence / UCH proteinases / poly-ADP-D-ribose binding / polytene chromosome / positive regulation of cell growth involved in cardiac muscle cell development / NAD+-protein-serine ADP-ribosyltransferase activity / NAD DNA ADP-ribosyltransferase activity / DNA ADP-ribosylation / poly-ADP-D-ribose modification-dependent protein binding / HDR through MMEJ (alt-NHEJ) / hippocampal neuron apoptotic process / NAD+ ADP-ribosyltransferase / protein auto-ADP-ribosylation / nucleosomal DNA binding / NAD+-protein-aspartate ADP-ribosyltransferase activity / protein poly-ADP-ribosylation / NAD+-protein-glutamate ADP-ribosyltransferase activity / nuclear chromosome / NAD+-protein mono-ADP-ribosyltransferase activity / DNA repair-dependent chromatin remodeling / decidualization / Transferases; Glycosyltransferases; Pentosyltransferases / POLB-Dependent Long Patch Base Excision Repair / NAD+ poly-ADP-ribosyltransferase activity / nucleosome binding / site of DNA damage / extrinsic apoptotic signaling pathway / nucleotidyltransferase activity / base-excision repair / DNA Damage Recognition in GG-NER / Dual Incision in GG-NER / Formation of Incision Complex in GG-NER / structural constituent of chromatin / nucleosome / double-strand break repair / heterochromatin formation / nucleosome assembly / chromosome / chromatin organization / damaged DNA binding / protein heterodimerization activity / DNA repair / DNA damage response / chromatin binding / chromatin / protein-containing complex binding / nucleolus / DNA binding / nucleoplasm / nucleus / cytosol
Similarity search - Function
: / Poly(ADP-ribose) polymerase, regulatory domain / WGR domain / WGR domain superfamily / WGR domain / WGR domain profile. / Proposed nucleic acid binding domain / Poly(ADP-ribose) polymerase, regulatory domain superfamily / Poly(ADP-ribose) polymerase, regulatory domain / PARP alpha-helical domain profile. ...: / Poly(ADP-ribose) polymerase, regulatory domain / WGR domain / WGR domain superfamily / WGR domain / WGR domain profile. / Proposed nucleic acid binding domain / Poly(ADP-ribose) polymerase, regulatory domain superfamily / Poly(ADP-ribose) polymerase, regulatory domain / PARP alpha-helical domain profile. / Poly(ADP-ribose) polymerase catalytic domain / Poly(ADP-ribose) polymerase, catalytic domain / PARP catalytic domain profile. / : / Histone H2A conserved site / Histone H2A signature. / Histone H2B signature. / Histone H2B / Histone H2B / Histone H2A, C-terminal domain / C-terminus of histone H2A / Histone 2A / Histone H2A / TATA box binding protein associated factor / TATA box binding protein associated factor (TAF), histone-like fold domain / Histone H4, conserved site / Histone H4 signature. / Histone H4 / Histone H4 / CENP-T/Histone H4, histone fold / Centromere kinetochore component CENP-T histone fold / Histone H3 signature 1. / Histone H3 signature 2. / Histone H3 / Histone H3/CENP-A / Histone H2A/H2B/H3 / Core histone H2A/H2B/H3/H4 domain / Histone-fold
Similarity search - Domain/homology
DNA / DNA (> 10) / DNA (> 100) / Histone H2B / Histone H3 / Histone H4 / Histone H2A / Poly [ADP-ribose] polymerase 2
Similarity search - Component
Biological speciesDrosophila melanogaster (fruit fly)
Mus musculus (house mouse)
Homo sapiens (human)
synthetic construct (others)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.1 Å
AuthorsKim, T.H. / Jayathilake, C. / Virk, R.K. / Gregory-Lott, E.R.
Funding support United States, 2items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R35GM154859 United States
American Cancer SocietyIRG-16-186-21 United States
CitationJournal: J.Mol.Biol. / Year: 2026
Title: High-Yield Production of Modified DNA Enables Structural Analysis of PARP2 Recognition of Nucleosomal Single-Strand Breaks.
Authors: Jayathilake, C. / Mewhinney, C.E. / Gregory-Lott, E.R. / Virk, R.K. / Nair, R. / Yang, J. / Cho, E. / Day, A.G. / Taylor, D.J. / Kim, T.H.
History
DepositionDec 18, 2025Deposition site: RCSB / Processing site: RCSB
Revision 1.0Mar 25, 2026Provider: repository / Type: Initial release
Revision 1.0Mar 25, 2026Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Mar 25, 2026Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Mar 25, 2026Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Mar 25, 2026Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Mar 25, 2026Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Mar 25, 2026Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Histone H2A
B: Histone H2A
C: Histone H2B
D: Histone H2B
E: Histone H3
F: Histone H3
G: Histone H4
H: Histone H4
I: mAb PL2-6 antibody
J: mAb PL2-6 antibody
K: DNA (69-MER)
L: DNA (128-MER)
M: DNA (197-MER)
P: Poly [ADP-ribose] polymerase 2


Theoretical massNumber of molelcules
Total (without water)345,79614
Polymers345,79614
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

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Protein , 5 types, 9 molecules ABCDEFGHP

#1: Protein Histone H2A


Mass: 13388.727 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Drosophila melanogaster (fruit fly)
Gene: His2A, H2a, His2A:CG31618, CG31618, His2A:CG33808, CG33808, His2A:CG33814, CG33814, His2A:CG33817, CG33817, His2A:CG33820, CG33820, His2A:CG33823, CG33823, His2A:CG33826, CG33826, His2A: ...Gene: His2A, H2a, His2A:CG31618, CG31618, His2A:CG33808, CG33808, His2A:CG33814, CG33814, His2A:CG33817, CG33817, His2A:CG33820, CG33820, His2A:CG33823, CG33823, His2A:CG33826, CG33826, His2A:CG33829, CG33829, His2A:CG33832, CG33832, His2A:CG33835, CG33835, His2A:CG33838, CG33838, His2A:CG33841, CG33841, His2A:CG33844, CG33844, His2A:CG33847, CG33847, His2A:CG33850, CG33850, His2A:CG33862, CG33862, His2A:CG33865, CG33865
Production host: Escherichia coli (E. coli) / References: UniProt: P84051
#2: Protein Histone H2B


Mass: 13897.275 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Drosophila melanogaster (fruit fly)
Gene: His2B, His2B:CG17949, CG17949, His2B:CG33868, CG33868, His2B:CG33870, CG33870, His2B:CG33872, CG33872, His2B:CG33874, CG33874, His2B:CG33876, CG33876, His2B:CG33878, CG33878, His2B:CG33880, ...Gene: His2B, His2B:CG17949, CG17949, His2B:CG33868, CG33868, His2B:CG33870, CG33870, His2B:CG33872, CG33872, His2B:CG33874, CG33874, His2B:CG33876, CG33876, His2B:CG33878, CG33878, His2B:CG33880, CG33880, His2B:CG33882, CG33882, His2B:CG33884, CG33884, His2B:CG33886, CG33886, His2B:CG33888, CG33888, His2B:CG33890, CG33890, His2B:CG33892, CG33892, His2B:CG33894, CG33894, His2B:CG33896, CG33896, His2B:CG33898, CG33898, His2B:CG33900, CG33900, His2B:CG33902, CG33902, His2B:CG33904, CG33904, His2B:CG33906, CG33906, His2B:CG33908, CG33908, His2B:CG33910, CG33910
Production host: Escherichia coli (E. coli) / References: UniProt: P02283
#3: Protein Histone H3


Mass: 15405.036 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Drosophila melanogaster (fruit fly)
Gene: His3, His3:CG31613, CG31613, His3:CG33803, CG33803, His3:CG33806, CG33806, His3:CG33809, CG33809, His3:CG33812, CG33812, His3:CG33815, CG33815, His3:CG33818, CG33818, His3:CG33821, CG33821, ...Gene: His3, His3:CG31613, CG31613, His3:CG33803, CG33803, His3:CG33806, CG33806, His3:CG33809, CG33809, His3:CG33812, CG33812, His3:CG33815, CG33815, His3:CG33818, CG33818, His3:CG33821, CG33821, His3:CG33824, CG33824, His3:CG33827, CG33827, His3:CG33830, CG33830, His3:CG33833, CG33833, His3:CG33836, CG33836, His3:CG33839, CG33839, His3:CG33842, CG33842, His3:CG33845, CG33845, His3:CG33848, CG33848, His3:CG33851, CG33851, His3:CG33854, CG33854, His3:CG33857, CG33857, His3:CG33860, CG33860, His3:CG33863, CG33863, His3:CG33866, CG33866
Production host: Escherichia coli (E. coli) / References: UniProt: P02299
#4: Protein Histone H4


Mass: 11521.611 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Drosophila melanogaster (fruit fly)
Gene: His4, H4, His4r, H4r, CG3379, His4:CG31611, CG31611, His4:CG33869, CG33869, His4:CG33871, CG33871, His4:CG33873, CG33873, His4:CG33875, CG33875, His4:CG33877, CG33877, His4:CG33879, CG33879, ...Gene: His4, H4, His4r, H4r, CG3379, His4:CG31611, CG31611, His4:CG33869, CG33869, His4:CG33871, CG33871, His4:CG33873, CG33873, His4:CG33875, CG33875, His4:CG33877, CG33877, His4:CG33879, CG33879, His4:CG33881, CG33881, His4:CG33883, CG33883, His4:CG33885, CG33885, His4:CG33887, CG33887, His4:CG33889, CG33889, His4:CG33891, CG33891, His4:CG33893, CG33893, His4:CG33895, CG33895, His4:CG33897, CG33897, His4:CG33899, CG33899, His4:CG33901, CG33901, His4:CG33903, CG33903, His4:CG33905, CG33905, His4:CG33907, CG33907, His4:CG33909, CG33909
Production host: Escherichia coli (E. coli) / References: UniProt: P84040
#9: Protein Poly [ADP-ribose] polymerase 2 / PARP-2 / hPARP-2 / ADP-ribosyltransferase diphtheria toxin-like 2 / ARTD2 / DNA ADP- ...PARP-2 / hPARP-2 / ADP-ribosyltransferase diphtheria toxin-like 2 / ARTD2 / DNA ADP-ribosyltransferase PARP2 / NAD(+) ADP-ribosyltransferase 2 / ADPRT-2 / Poly[ADP-ribose] synthase 2 / pADPRT-2 / Protein poly-ADP-ribosyltransferase PARP2


Mass: 56503.555 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PARP2, ADPRT2, ADPRTL2 / Production host: Escherichia coli (E. coli)
References: UniProt: Q9UGN5, NAD+ ADP-ribosyltransferase, Transferases; Glycosyltransferases; Pentosyltransferases

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DNA chain , 3 types, 3 molecules KLM

#6: DNA chain DNA (69-MER)


Mass: 21238.523 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)
#7: DNA chain DNA (128-MER)


Mass: 39167.000 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)
#8: DNA chain DNA (197-MER)


Mass: 61197.965 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)

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Antibody , 1 types, 2 molecules IJ

#5: Antibody mAb PL2-6 antibody


Mass: 29631.662 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Details: Sequence corresponds to GenBank IDs X60334 and X60341.
Source: (gene. exp.) Mus musculus (house mouse) / Production host: Escherichia coli (E. coli)

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Details

Has protein modificationY

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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: Nucleosome with an SSB at SHL -2.8 in complex with human PARP2 and HPF1, Class 1
Type: COMPLEX / Entity ID: all / Source: MULTIPLE SOURCES
Molecular weightExperimental value: NO
Source (natural)Organism: Drosophila melanogaster (fruit fly)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.4
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid type: Quantifoil R2/1
VitrificationCryogen name: ETHANE / Humidity: 100 %

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 1800 nm / Nominal defocus min: 800 nm
Image recordingElectron dose: 49 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

EM software
IDNameVersionCategory
1cryoSPARC4.7.0particle selection
2PHENIX1.21.2_5419model refinement
3SerialEMimage acquisition
5cryoSPARC4.7.0CTF correction
10cryoSPARC4.7.0initial Euler assignment
11cryoSPARC4.7.0final Euler assignment
13cryoSPARC4.7.03D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.1 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 952082 / Symmetry type: POINT

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