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Entry
Database: PDB / ID: 7lyb
TitleCryo-EM structure of the human nucleosome core particle in complex with BRCA1-BARD1-UbcH5c
Components
  • BRCA1-associated RING domain protein 1
  • DNA (146-MER)
  • DNA (147-MER)
  • Histone H2A type 1-B/E
  • Histone H2B type 1-J
  • Histone H3.1
  • Histone H4
  • Isoform 7 of Breast cancer type 1 susceptibility protein
  • Ubiquitin-conjugating enzyme E2 D3
KeywordsSTRUCTURAL PROTEIN/DNA / Nucleosome core particle / chromatin / BRCA1 / BARD1 / UbcH5c / DNA repair / DNA double-strand break / Homologous recombination / 53BP1 / STRUCTURAL PROTEIN-DNA complex
Function / homology
Function and homology information


negative regulation of mRNA 3'-end processing / histone H2AK127 ubiquitin ligase activity / histone H2AK129 ubiquitin ligase activity / Defective DNA double strand break response due to BRCA1 loss of function / Defective DNA double strand break response due to BARD1 loss of function / BRCA1-BARD1 complex / BRCA1-B complex / BRCA1-A complex / BRCA1-C complex / negative regulation of centriole replication ...negative regulation of mRNA 3'-end processing / histone H2AK127 ubiquitin ligase activity / histone H2AK129 ubiquitin ligase activity / Defective DNA double strand break response due to BRCA1 loss of function / Defective DNA double strand break response due to BARD1 loss of function / BRCA1-BARD1 complex / BRCA1-B complex / BRCA1-A complex / BRCA1-C complex / negative regulation of centriole replication / sex-chromosome dosage compensation / random inactivation of X chromosome / ubiquitin-modified histone reader activity / chordate embryonic development / nuclear ubiquitin ligase complex / cellular response to indole-3-methanol / gamma-tubulin ring complex / negative regulation of intracellular estrogen receptor signaling pathway / DNA strand resection involved in replication fork processing / negative regulation of fatty acid biosynthetic process / homologous recombination / Regulation of MITF-M-dependent genes involved in DNA replication, damage repair and senescence / tissue homeostasis / Signaling by BMP / protein K6-linked ubiquitination / regulation of phosphorylation / (E3-independent) E2 ubiquitin-conjugating enzyme / lateral element / regulation of DNA damage checkpoint / Impaired BRCA2 binding to PALB2 / XY body / mitotic G2/M transition checkpoint / negative regulation of protein export from nucleus / protein K11-linked ubiquitination / RNA polymerase binding / DNA damage tolerance / DNA repair complex / centrosome cycle / positive regulation of protein targeting to mitochondrion / Homologous DNA Pairing and Strand Exchange / Defective homologous recombination repair (HRR) due to BRCA1 loss of function / Defective HDR through Homologous Recombination Repair (HRR) due to PALB2 loss of BRCA1 binding function / Defective HDR through Homologous Recombination Repair (HRR) due to PALB2 loss of BRCA2/RAD51/RAD51C binding function / Resolution of D-loop Structures through Synthesis-Dependent Strand Annealing (SDSA) / Resolution of D-loop Structures through Holliday Junction Intermediates / HDR through Single Strand Annealing (SSA) / intracellular membraneless organelle / E2 ubiquitin-conjugating enzyme / response to ionizing radiation / negative regulation of gene expression via chromosomal CpG island methylation / Impaired BRCA2 binding to RAD51 / Transcriptional Regulation by E2F6 / mitotic G2 DNA damage checkpoint signaling / negative regulation of cell cycle / ubiquitin conjugating enzyme activity / negative regulation of reactive oxygen species metabolic process / positive regulation of vascular endothelial growth factor production / Presynaptic phase of homologous DNA pairing and strand exchange / protein monoubiquitination / negative regulation of BMP signaling pathway / ubiquitin ligase complex / negative regulation of tumor necrosis factor-mediated signaling pathway / protein K48-linked ubiquitination / SUMOylation of DNA damage response and repair proteins / negative regulation of extrinsic apoptotic signaling pathway via death domain receptors / regulation of DNA repair / negative regulation of megakaryocyte differentiation / protein autoubiquitination / protein localization to CENP-A containing chromatin / Chromatin modifying enzymes / Replacement of protamines by nucleosomes in the male pronucleus / CENP-A containing nucleosome / Packaging Of Telomere Ends / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / Deposition of new CENPA-containing nucleosomes at the centromere / Recognition and association of DNA glycosylase with site containing an affected pyrimidine / Cleavage of the damaged pyrimidine / tubulin binding / telomere organization / Interleukin-7 signaling / Inhibition of DNA recombination at telomere / RNA Polymerase I Promoter Opening / Meiotic synapsis / positive regulation of DNA repair / Assembly of the ORC complex at the origin of replication / TICAM1, RIP1-mediated IKK complex recruitment / SUMOylation of chromatin organization proteins / Regulation of endogenous retroelements by the Human Silencing Hub (HUSH) complex / epigenetic regulation of gene expression / DNA methylation / Condensation of Prophase Chromosomes / IKK complex recruitment mediated by RIP1 / Chromatin modifications during the maternal to zygotic transition (MZT) / SIRT1 negatively regulates rRNA expression / HCMV Late Events / PINK1-PRKN Mediated Mitophagy / innate immune response in mucosa / ERCC6 (CSB) and EHMT2 (G9a) positively regulate rRNA expression / PRC2 methylates histones and DNA
Similarity search - Function
BARD1, Zinc finger, RING-type / zf-RING of BARD1-type protein / Breast cancer type 1 susceptibility protein (BRCA1) / BRCA1, serine-rich domain / BRCA1-associated / Serine-rich domain associated with BRCT / Zinc finger, C3HC4 RING-type / Zinc finger, C3HC4 type (RING finger) / BRCA1 C Terminus (BRCT) domain / Ubiquitin-conjugating enzyme, active site ...BARD1, Zinc finger, RING-type / zf-RING of BARD1-type protein / Breast cancer type 1 susceptibility protein (BRCA1) / BRCA1, serine-rich domain / BRCA1-associated / Serine-rich domain associated with BRCT / Zinc finger, C3HC4 RING-type / Zinc finger, C3HC4 type (RING finger) / BRCA1 C Terminus (BRCT) domain / Ubiquitin-conjugating enzyme, active site / Ubiquitin-conjugating (UBC) active site signature. / Ubiquitin-conjugating enzyme E2 / Ubiquitin-conjugating enzyme / Ubiquitin-conjugating (UBC) core domain profile. / Ubiquitin-conjugating enzyme E2, catalytic domain homologues / breast cancer carboxy-terminal domain / Ubiquitin-conjugating enzyme/RWD-like / BRCT domain profile. / BRCT domain / BRCT domain superfamily / Zinc finger, RING-type, conserved site / Zinc finger RING-type signature. / Ring finger / : / Histone H2B signature. / Histone H2A conserved site / Histone H2A 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 / Ankyrin repeats (3 copies) / Histone H4, conserved site / Histone H4 signature. / Histone H4 / Histone H4 / CENP-T/Histone H4, histone fold / Centromere kinetochore component CENP-T histone fold / Ankyrin repeat profile. / Ankyrin repeat region circular profile. / ankyrin repeats / Ankyrin repeat / Zinc finger RING-type profile. / Ankyrin repeat-containing domain superfamily / Zinc finger, RING-type / 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 / Zinc finger, RING/FYVE/PHD-type
Similarity search - Domain/homology
DNA / DNA (> 10) / DNA (> 100) / Histone H2A type 1-B/E / Histone H2B type 1-J / Breast cancer type 1 susceptibility protein / Ubiquitin-conjugating enzyme E2 D3 / Histone H4 / Histone H3.1 / BRCA1-associated RING domain protein 1
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.28 Å
AuthorsHu, Q. / Botuyan, M.V. / Zhao, D. / Cui, D. / Mer, E. / Mer, G.
Funding support United States, 3items
OrganizationGrant numberCountry
National Institutes of Health/National Cancer Institute (NIH/NCI)R01 CA132878 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R35 GM136262 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01 GM116829 United States
CitationJournal: Nature / Year: 2021
Title: Mechanisms of BRCA1-BARD1 nucleosome recognition and ubiquitylation.
Authors: Qi Hu / Maria Victoria Botuyan / Debiao Zhao / Gaofeng Cui / Elie Mer / Georges Mer /
Abstract: The BRCA1-BARD1 tumour suppressor is an E3 ubiquitin ligase necessary for the repair of DNA double-strand breaks by homologous recombination. The BRCA1-BARD1 complex localizes to damaged chromatin ...The BRCA1-BARD1 tumour suppressor is an E3 ubiquitin ligase necessary for the repair of DNA double-strand breaks by homologous recombination. The BRCA1-BARD1 complex localizes to damaged chromatin after DNA replication and catalyses the ubiquitylation of histone H2A and other cellular targets. The molecular bases for the recruitment to double-strand breaks and target recognition of BRCA1-BARD1 remain unknown. Here we use cryo-electron microscopy to show that the ankyrin repeat and tandem BRCT domains in BARD1 adopt a compact fold and bind to nucleosomal histones, DNA and monoubiquitin attached to H2A amino-terminal K13 or K15, two signals known to be specific for double-strand breaks. We further show that RING domains in BRCA1-BARD1 orient an E2 ubiquitin-conjugating enzyme atop the nucleosome in a dynamic conformation, primed for ubiquitin transfer to the flexible carboxy-terminal tails of H2A and variant H2AX. Our work reveals a regulatory crosstalk in which recognition of monoubiquitin by BRCA1-BARD1 at the N terminus of H2A blocks the formation of polyubiquitin chains and cooperatively promotes ubiquitylation at the C terminus of H2A. These findings elucidate the mechanisms of BRCA1-BARD1 chromatin recruitment and ubiquitylation specificity, highlight key functions of BARD1 in both processes and explain how BRCA1-BARD1 promotes homologous recombination by opposing the DNA repair protein 53BP1 in post-replicative chromatin. These data provide a structural framework to evaluate BARD1 variants and help to identify mutations that drive the development of cancer.
History
DepositionMar 6, 2021Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 28, 2021Provider: repository / Type: Initial release
Revision 1.1Aug 4, 2021Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.title / _citation.year / _citation_author.identifier_ORCID
Revision 1.2Aug 25, 2021Group: Database references / Category: citation / citation_author / database_2
Item: _citation.pdbx_database_id_PubMed / _citation.title ..._citation.pdbx_database_id_PubMed / _citation.title / _citation_author.name / _database_2.pdbx_DOI / _database_2.pdbx_database_accession
Revision 1.3Sep 1, 2021Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last
Revision 1.4Oct 23, 2024Group: Data collection / Refinement description / Structure summary
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / em_3d_fitting_list / em_admin / pdbx_entry_details / pdbx_initial_refinement_model / pdbx_modification_feature
Item: _em_3d_fitting_list.accession_code / _em_3d_fitting_list.initial_refinement_model_id ..._em_3d_fitting_list.accession_code / _em_3d_fitting_list.initial_refinement_model_id / _em_3d_fitting_list.source_name / _em_3d_fitting_list.type / _em_admin.last_update / _pdbx_entry_details.has_protein_modification

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Structure visualization

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Assembly

Deposited unit
A: Histone H3.1
B: Histone H4
D: Histone H2B type 1-J
E: Histone H3.1
F: Histone H4
H: Histone H2B type 1-J
I: DNA (147-MER)
J: DNA (146-MER)
M: Isoform 7 of Breast cancer type 1 susceptibility protein
P: Ubiquitin-conjugating enzyme E2 D3
N: BRCA1-associated RING domain protein 1
C: Histone H2A type 1-B/E
G: Histone H2A type 1-B/E
hetero molecules


Theoretical massNumber of molelcules
Total (without water)241,82917
Polymers241,56713
Non-polymers2624
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Protein , 7 types, 11 molecules AEBFDHMPNCG

#1: Protein Histone H3.1 / Histone H3/a / Histone H3/b / Histone H3/c / Histone H3/d / Histone H3/f / Histone H3/h / Histone ...Histone H3/a / Histone H3/b / Histone H3/c / Histone H3/d / Histone H3/f / Histone H3/h / Histone H3/i / Histone H3/j / Histone H3/k / Histone H3/l


Mass: 15786.534 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human)
Gene: H3C1, H3FA, HIST1H3A, H3C2, H3FL, HIST1H3B, H3C3, H3FC HIST1H3C, H3C4, H3FB, HIST1H3D, H3C6, H3FD, HIST1H3E, H3C7, H3FI, HIST1H3F, H3C8, H3FH, HIST1H3G, H3C10, H3FK, HIST1H3H, H3C11, H3FF, ...Gene: H3C1, H3FA, HIST1H3A, H3C2, H3FL, HIST1H3B, H3C3, H3FC HIST1H3C, H3C4, H3FB, HIST1H3D, H3C6, H3FD, HIST1H3E, H3C7, H3FI, HIST1H3F, H3C8, H3FH, HIST1H3G, H3C10, H3FK, HIST1H3H, H3C11, H3FF, HIST1H3I, H3C12, H3FJ, HIST1H3J
Production host: Escherichia coli (E. coli) / References: UniProt: P68431
#2: Protein Histone H4


Mass: 11743.792 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human)
Gene: H4C1, H4/A, H4FA, HIST1H4A, H4C2, H4/I, H4FI, HIST1H4B, H4C3, H4/G, H4FG, HIST1H4C, H4C4, H4/B, H4FB, HIST1H4D, H4C5, H4/J, H4FJ, HIST1H4E, H4C6, H4/C, H4FC, HIST1H4F, H4C8, H4/H, H4FH, ...Gene: H4C1, H4/A, H4FA, HIST1H4A, H4C2, H4/I, H4FI, HIST1H4B, H4C3, H4/G, H4FG, HIST1H4C, H4C4, H4/B, H4FB, HIST1H4D, H4C5, H4/J, H4FJ, HIST1H4E, H4C6, H4/C, H4FC, HIST1H4F, H4C8, H4/H, H4FH, HIST1H4H, H4C9, H4/M, H4FM, HIST1H4I, H4C11, H4/E, H4FE, HIST1H4J, H4C12, H4/D, H4FD, HIST1H4K, H4C13, H4/K, H4FK, HIST1H4L, H4C14, H4/N, H4F2, H4FN, HIST2H4, HIST2H4A, H4C15, H4/O, H4FO, HIST2H4B, H4-16, HIST4H4
Production host: Escherichia coli (E. coli) / References: UniProt: P62805
#3: Protein Histone H2B type 1-J / Histone H2B.1 / Histone H2B.r / H2B/r


Mass: 13930.181 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: H2BC11, H2BFR, HIST1H2BJ / Production host: Escherichia coli (E. coli) / References: UniProt: P06899
#6: Protein Isoform 7 of Breast cancer type 1 susceptibility protein / RING finger protein 53 / RING-type E3 ubiquitin transferase BRCA1


Mass: 13053.065 Da / Num. of mol.: 1 / Fragment: RING domain (UNP residues 1-100)
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: BRCA1, RNF53 / Production host: Escherichia coli (E. coli)
References: UniProt: P38398, RING-type E3 ubiquitin transferase
#7: Protein Ubiquitin-conjugating enzyme E2 D3 / (E3-independent) E2 ubiquitin-conjugating enzyme D3 / E2 ubiquitin-conjugating enzyme D3 / ...(E3-independent) E2 ubiquitin-conjugating enzyme D3 / E2 ubiquitin-conjugating enzyme D3 / Ubiquitin carrier protein D3 / Ubiquitin-conjugating enzyme E2(17)KB 3 / Ubiquitin-conjugating enzyme E2-17 kDa 3 / Ubiquitin-protein ligase D3


Mass: 17869.113 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: UBE2D3, UBC5C, UBCH5C / Production host: Escherichia coli (E. coli)
References: UniProt: P61077, E2 ubiquitin-conjugating enzyme, (E3-independent) E2 ubiquitin-conjugating enzyme
#8: Protein BRCA1-associated RING domain protein 1 / BARD-1 / RING-type E3 ubiquitin transferase BARD1


Mass: 10906.617 Da / Num. of mol.: 1 / Fragment: RING domain (UNP residues 26-122)
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: BARD1 / Production host: Escherichia coli (E. coli)
References: UniProt: Q99728, RING-type E3 ubiquitin transferase
#9: Protein Histone H2A type 1-B/E / Histone H2A.2 / Histone H2A/a / Histone H2A/m


Mass: 13034.193 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: H2AC4, H2AFM, HIST1H2AB, H2AC8, H2AFA, HIST1H2AE / Production host: Escherichia coli (E. coli) / References: UniProt: P04908

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DNA chain , 2 types, 2 molecules IJ

#4: DNA chain DNA (147-MER)


Mass: 45138.770 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli)
#5: DNA chain DNA (146-MER)


Mass: 45610.043 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli)

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Non-polymers , 1 types, 4 molecules

#10: Chemical
ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Zn

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Details

Has ligand of interestN
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: Human nucleosome core particle in complex with BRCA1-BARD1-UbcH5c
Type: COMPLEX / Entity ID: #1-#9 / Source: RECOMBINANT
Molecular weightUnits: MEGADALTONS / Experimental value: YES
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.5
SpecimenConc.: 0.3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES / Details: 10 mM HEPES, 100 mM NaCl, 1 mM DTT, pH 7.5
Specimen supportGrid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K

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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 FIELD / Nominal magnification: 22500 X / Cs: 2.7 mm
Specimen holderSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 1 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 5490

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Processing

SoftwareName: PHENIX / Version: 1.18.2_3874: / Classification: refinement
EM software
IDNameVersionCategory
1RELION3particle selection
2cryoSPARC2.14particle selection
3SerialEMimage acquisition
5cryoSPARC2.14CTF correction
8PHENIX1.18.2-3874model fitting
10PHENIX1.18.2-3874model refinement
11cryoSPARC2.14initial Euler assignment
12cryoSPARC2.14final Euler assignment
13cryoSPARC2.14classification
14cryoSPARC2.143D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 6380972
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.28 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 74575 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Space: REAL
Atomic model building
IDPDB-ID 3D fitting-IDAccession codeInitial refinement model-IDSource nameType
11JM7

1jm7

11JM71PDBexperimental model
25EGG

5egg

15EGG2PDBexperimental model
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00615573
ELECTRON MICROSCOPYf_angle_d0.74522293
ELECTRON MICROSCOPYf_dihedral_angle_d30.0554157
ELECTRON MICROSCOPYf_chiral_restr0.0432532
ELECTRON MICROSCOPYf_plane_restr0.0051814

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