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- EMDB-23590: Cryo-EM structure of the human nucleosome core particle with link... -

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Basic information

Entry
Database: EMDB / ID: EMD-23590
TitleCryo-EM structure of the human nucleosome core particle with linked histone proteins H2A and H2B
Map data
SampleNucleosome core particle with linked histone proteins H2A and H2B:
Histone H3.1Histone H3 / Histone H4 / Histone H2B type 1-J / (nucleic-acidNucleic acid) x 2 / Histone H2A type 1-B/E
Function / homology
Function and homology information


negative regulation of tumor necrosis factor-mediated signaling pathway / negative regulation of megakaryocyte differentiation / Packaging Of Telomere Ends / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / Chromatin modifying enzymes / Deposition of new CENPA-containing nucleosomes at the centromere / DNA replication-independent chromatin assembly / Recognition and association of DNA glycosylase with site containing an affected pyrimidine / Cleavage of the damaged pyrimidine ...negative regulation of tumor necrosis factor-mediated signaling pathway / negative regulation of megakaryocyte differentiation / Packaging Of Telomere Ends / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / Chromatin modifying enzymes / Deposition of new CENPA-containing nucleosomes at the centromere / DNA replication-independent chromatin assembly / Recognition and association of DNA glycosylase with site containing an affected pyrimidine / Cleavage of the damaged pyrimidine / Inhibition of DNA recombination at telomere / Meiotic synapsis / heterochromatin assembly => GO:0031507 / telomere organization / RNA Polymerase I Promoter Opening / SUMOylation of chromatin organization proteins / Interleukin-7 signaling / DNA replication-dependent chromatin assembly / DNA methylation / HCMV Late Events / innate immune response in mucosa / SIRT1 negatively regulates rRNA expression / ERCC6 (CSB) and EHMT2 (G9a) positively regulate rRNA expression / Condensation of Prophase Chromosomes / PRC2 methylates histones and DNA / Defective pyroptosis / : / RNA Polymerase I Promoter Escape / HDACs deacetylate histones / nuclear chromosome / Transcriptional regulation by small RNAs / NoRC negatively regulates rRNA expression / Nonhomologous End-Joining (NHEJ) / Formation of the beta-catenin:TCF transactivating complex / RUNX1 regulates genes involved in megakaryocyte differentiation and platelet function / B-WICH complex positively regulates rRNA expression / DNA-templated transcription, initiation / Metalloprotease DUBs / Activated PKN1 stimulates transcription of AR (androgen receptor) regulated genes KLK2 and KLK3 / DNA Damage/Telomere Stress Induced Senescence / lipopolysaccharide binding / G2/M DNA damage checkpoint / nucleosome assembly / RMTs methylate histone arginines / HCMV Early Events / HDMs demethylate histones / Pre-NOTCH Transcription and Translation / Meiotic recombination / PKMTs methylate histone lysines / nucleosome / Activation of anterior HOX genes in hindbrain development during early embryogenesis / UCH proteinases / Transcriptional regulation of granulopoiesis / E3 ubiquitin ligases ubiquitinate target proteins / RUNX1 regulates transcription of genes involved in differentiation of HSCs / Recruitment and ATM-mediated phosphorylation of repair and signaling proteins at DNA double strand breaks / Processing of DNA double-strand break ends / Factors involved in megakaryocyte development and platelet production / HATs acetylate histones / Senescence-Associated Secretory Phenotype (SASP) / chromosome, telomeric region / killing of cells of another organism / Oxidative Stress Induced Senescence / antibacterial humoral response / Estrogen-dependent gene expression / antimicrobial humoral immune response mediated by antimicrobial peptide / Ub-specific processing proteases / cadherin binding / defense response to Gram-negative bacterium / defense response to Gram-positive bacterium / protein heterodimerization activity / Amyloid fiber formation / negative regulation of cell population proliferation / protein domain specific binding / protein-containing complex / RNA binding / DNA binding / extracellular space / extracellular exosome / membrane / extracellular region / nucleoplasm / nucleus / cytosol
Similarity search - Function
Histone H2B signature. / Histone H2B / Histone H2B / Histone H2A conserved site / Histone H2A signature. / Histone H2A, C-terminal domain / C-terminus of histone H2A / Histone 2A / Histone H2A / Histone H4, conserved site ...Histone H2B signature. / Histone H2B / Histone H2B / Histone H2A conserved site / Histone H2A signature. / Histone H2A, C-terminal domain / C-terminus of histone H2A / Histone 2A / Histone H2A / Histone H4, conserved site / Histone H4 signature. / Histone H4 / Histone H4 / CENP-T/Histone H4, histone fold / Centromere kinetochore component CENP-T histone fold / TATA box binding protein associated factor / TATA box binding protein associated factor (TAF) / Histone H3 signature 1. / Histone H3 signature 2. / Histone H3 / Histone H3/CENP-A / Histone H2A/H2B/H3 / Core histone H2A/H2B/H3/H4 / Histone-fold
Similarity search - Domain/homology
Histone H2A type 1-B/E / Histone H2B type 1-J / Histone H4 / Histone H3.1
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.91 Å
AuthorsHu Q / Botuyan MV / Zhao D / Cui D / Mer E / Mer G
Funding support United States, 3 items
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, 2021-
Header (metadata) releaseJul 28, 2021-
Map releaseJul 28, 2021-
UpdateSep 1, 2021-
Current statusSep 1, 2021Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.3
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.3
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7lya
  • Surface level: 0.3
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

Downloads & links

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Map

FileDownload / File: emd_23590.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.03 Å/pix.
x 256 pix.
= 263.936 Å
1.03 Å/pix.
x 256 pix.
= 263.936 Å
1.03 Å/pix.
x 256 pix.
= 263.936 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.031 Å
Density
Contour LevelBy AUTHOR: 0.3 / Movie #1: 0.3
Minimum - Maximum-1.3528928 - 2.2686741
Average (Standard dev.)-0.000116757175 (±0.06767832)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 263.936 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.0311.0311.031
M x/y/z256256256
origin x/y/z0.0000.0000.000
length x/y/z263.936263.936263.936
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ300300300
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS256256256
D min/max/mean-1.3532.269-0.000

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Supplemental data

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Segmentation: #1

Fileemd_23590_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Half map: #2

Fileemd_23590_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Half map: #1

Fileemd_23590_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Sample components

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Entire Nucleosome core particle with linked histone proteins H2A and H2B

EntireName: Nucleosome core particle with linked histone proteins H2A and H2B
Number of Components: 7

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Component #1: protein, Nucleosome core particle with linked histone proteins H2...

ProteinName: Nucleosome core particle with linked histone proteins H2A and H2B
Recombinant expression: No
SourceSpecies: Homo sapiens (human)
Source (engineered)Expression System: Escherichia coli (E. coli)

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Component #2: protein, Histone H3.1

ProteinName: Histone H3.1Histone H3 / Number of Copies: 2 / Recombinant expression: No
MassTheoretical: 15.786534 kDa
SourceSpecies: Homo sapiens (human)
Source (engineered)Expression System: Escherichia coli (E. coli)

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Component #3: protein, Histone H4

ProteinName: Histone H4 / Number of Copies: 2 / Recombinant expression: No
MassTheoretical: 11.743792 kDa
SourceSpecies: Homo sapiens (human)
Source (engineered)Expression System: Escherichia coli (E. coli)

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Component #4: protein, Histone H2B type 1-J

ProteinName: Histone H2B type 1-J / Number of Copies: 2 / Recombinant expression: No
MassTheoretical: 13.930181 kDa
SourceSpecies: Homo sapiens (human)
Source (engineered)Expression System: Escherichia coli (E. coli)

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Component #5: nucleic-acid, DNA (147-MER)

nucleic acidName: DNA (147-MER) / Class: DNA / Structure: OTHER / Synthetic: No
Sequence: (DA)(DT)(DC)(DG)(DA)(DG)(DA)(DA)(DT)(DC) (DC)(DC)(DG)(DG)(DT)(DG)(DC)(DC)(DG)(DA) (DG)(DG)(DC)(DC)(DG)(DC)(DT)(DC)(DA)(DA) (DT)(DT)(DG)(DG)(DT)(DC)(DG)(DT)(DA)(DG) (DA)(DC)(DA)(DG)(DC)(DT) ...Sequence:
(DA)(DT)(DC)(DG)(DA)(DG)(DA)(DA)(DT)(DC) (DC)(DC)(DG)(DG)(DT)(DG)(DC)(DC)(DG)(DA) (DG)(DG)(DC)(DC)(DG)(DC)(DT)(DC)(DA)(DA) (DT)(DT)(DG)(DG)(DT)(DC)(DG)(DT)(DA)(DG) (DA)(DC)(DA)(DG)(DC)(DT)(DC)(DT)(DA)(DG) (DC)(DA)(DC)(DC)(DG)(DC)(DT)(DT)(DA)(DA) (DA)(DC)(DG)(DC)(DA)(DC)(DG)(DT)(DA)(DC) (DG)(DC)(DG)(DC)(DT)(DG)(DT)(DC)(DC)(DC) (DC)(DC)(DG)(DC)(DG)(DT)(DT)(DT)(DT)(DA) (DA)(DC)(DC)(DG)(DC)(DC)(DA)(DA)(DG)(DG) (DG)(DG)(DA)(DT)(DT)(DA)(DC)(DT)(DC)(DC) (DC)(DT)(DA)(DG)(DT)(DC)(DT)(DC)(DC)(DA) (DG)(DG)(DC)(DA)(DC)(DG)(DT)(DG)(DT)(DC) (DA)(DG)(DA)(DT)(DA)(DT)(DA)(DT)(DA)(DC) (DA)(DT)(DC)(DC)(DG)(DA)(DT)
MassTheoretical: 45.13877 kDa
SourceSpecies: Homo sapiens (human)

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Component #6: nucleic-acid, DNA (146-MER)

nucleic acidName: DNA (146-MER) / Class: DNA / Structure: OTHER / Synthetic: No
Sequence: (DA)(DT)(DC)(DG)(DG)(DA)(DT)(DG)(DT)(DA) (DT)(DA)(DT)(DA)(DT)(DC)(DT)(DG)(DA)(DC) (DA)(DC)(DG)(DT)(DG)(DC)(DC)(DT)(DG)(DG) (DA)(DG)(DA)(DC)(DT)(DA)(DG)(DG)(DG)(DA) (DG)(DT)(DA)(DA)(DT)(DC) ...Sequence:
(DA)(DT)(DC)(DG)(DG)(DA)(DT)(DG)(DT)(DA) (DT)(DA)(DT)(DA)(DT)(DC)(DT)(DG)(DA)(DC) (DA)(DC)(DG)(DT)(DG)(DC)(DC)(DT)(DG)(DG) (DA)(DG)(DA)(DC)(DT)(DA)(DG)(DG)(DG)(DA) (DG)(DT)(DA)(DA)(DT)(DC)(DC)(DC)(DC)(DT) (DT)(DG)(DG)(DC)(DG)(DG)(DT)(DT)(DA)(DA) (DA)(DA)(DC)(DG)(DC)(DG)(DG)(DG)(DG)(DG) (DA)(DC)(DA)(DG)(DC)(DG)(DC)(DG)(DT)(DA) (DC)(DG)(DT)(DG)(DC)(DG)(DT)(DT)(DT)(DA) (DA)(DG)(DC)(DG)(DG)(DT)(DG)(DC)(DT)(DA) (DG)(DA)(DG)(DC)(DT)(DG)(DT)(DC)(DT)(DA) (DC)(DG)(DA)(DC)(DC)(DA)(DA)(DT)(DT)(DG) (DA)(DG)(DC)(DG)(DG)(DC)(DC)(DT)(DC)(DG) (DG)(DC)(DA)(DC)(DC)(DG)(DG)(DG)(DA)(DT) (DT)(DC)(DT)(DC)(DG)(DA)(DT)
MassTheoretical: 45.610043 kDa
SourceSpecies: Homo sapiens (human)

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Component #7: protein, Histone H2A type 1-B/E

ProteinName: Histone H2A type 1-B/E / Number of Copies: 2 / Recombinant expression: No
MassTheoretical: 13.034193 kDa
SourceSpecies: Homo sapiens (human)
Source (engineered)Expression System: Escherichia coli (E. coli)

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Experimental details

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Sample preparation

SpecimenSpecimen State: Particle / Method: cryo EM
Sample solutionSpecimen conc.: 0.3 mg/mL / pH: 7.5
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen Name: ETHANE / Temperature: 277 K / Humidity: 100 %

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
ImagingMicroscope: FEI TITAN KRIOS
Electron gunElectron Source: FIELD EMISSION GUN / Accelerating Voltage: 300 kV / Electron Dose: 1 e/Å2 / Illumination Mode: FLOOD BEAM
LensMagnification: 22500.0 X (nominal) / Cs: 2.7 mm / Imaging Mode: BRIGHT FIELD
Specimen HolderModel: FEI TITAN KRIOS AUTOGRID HOLDER
CameraDetector: OTHER

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Image acquisition

Image acquisitionNumber of Digital Images: 5490

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Image processing

ProcessingMethod: single particle reconstruction / Applied Symmetry: C2 (2 fold cyclic) / Number of Projections: 414315
3D reconstructionSoftware: cryoSPARC / Resolution: 2.91 Å / Resolution Method: FSC 0.143 CUT-OFF

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Atomic model buiding

Modeling #1Refinement protocol: rigid body / Refinement space: REAL
Output model

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