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- EMDB-62040: Cryo-EM structure of Arabidopsis thaliana H2A-nucleosome with 147... -

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Basic information

Entry
Database: EMDB / ID: EMD-62040
TitleCryo-EM structure of Arabidopsis thaliana H2A-nucleosome with 147bp Widom 601 DNA (C2 symmetry)
Map datamap
Sample
  • Complex: Arabidopsis thaliana H2A-nucleosome with 147bp Widom 601 DNA
    • Protein or peptide: Histone H3.1
    • Protein or peptide: Histone H4
    • Protein or peptide: Histone H2A.6
    • Protein or peptide: Histone H2B.1
    • DNA: Widom 601 DNA (147-MER)
    • DNA: Widom 601 DNA (147-MER)
Keywordsnucleosome / histone / H2A / Arabidopsis / NUCLEAR PROTEIN/DNA / NUCLEAR PROTEIN-DNA complex
Function / homology
Function and homology information


DNA-mediated transformation / chromocenter / thylakoid / response to water deprivation / plasmodesma / plant-type vacuole / plastid / chloroplast / response to bacterium / response to wounding ...DNA-mediated transformation / chromocenter / thylakoid / response to water deprivation / plasmodesma / plant-type vacuole / plastid / chloroplast / response to bacterium / response to wounding / structural constituent of chromatin / nucleosome / peroxisome / protein heterodimerization activity / nucleolus / DNA binding / extracellular region / nucleus / plasma membrane / 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 H2A / Histone 2A ...: / 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 H2A / Histone 2A / 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 / Histone-fold
Similarity search - Domain/homology
Histone H3.1 / Histone H4 / Histone H2A.6 / Histone H2B.1
Similarity search - Component
Biological speciesArabidopsis thaliana (thale cress)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.14 Å
AuthorsWang Y / Dong A
Funding support China, 1 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)31930017 China
CitationJournal: Structure / Year: 2025
Title: Structural and functional interrelationships of histone H2A with its variants H2A.Z and H2A.W in Arabidopsis.
Authors: Youchao Wang / Jiabing Wu / Shuoming Yang / Xiang Li / Jiachen Wang / Qinghe Lv / Xiaoyu Zhu / Guoliang Lu / Jinru Zhang / Wen-Hui Shen / Bing Liu / Jinzhong Lin / Aiwu Dong /
Abstract: Multiple histone H2A variants are known in eukaryotes. However, the functional relationship between H2A and its variants in plants remains largely obscure. Using CRISPR-Cas9 editing, we generated a ...Multiple histone H2A variants are known in eukaryotes. However, the functional relationship between H2A and its variants in plants remains largely obscure. Using CRISPR-Cas9 editing, we generated a mutant lacking four H2A isoforms in Arabidopsis and analyzed the functional and structural relationships between H2A, H2A.Z, and H2A.W. RNA sequencing and phenotype analyses revealed mild changes in gene transcription and plant development in mutants lacking H2A, H2A.Z, or H2A.W compared with the wild-type plants. Chromatin immunoprecipitation sequencing analysis showed that H2A can substitute for both H2A.Z and H2A.W across the genome, including in euchromatin and heterochromatin regions. However, H2A.Z replaced both H2A and H2A.W primarily within the euchromatin regions. By using DNA and histones from Arabidopsis, we constructed nucleosomes containing H2A, H2A.Z, or H2A.W and resolved their cryogenic electron microscopy (cryo-EM) structures at near-atomic resolution. Collectively, the results reveal the structural similarity and functional redundancy of H2A and its variants in Arabidopsis.
History
DepositionOct 21, 2024-
Header (metadata) releaseMay 14, 2025-
Map releaseMay 14, 2025-
UpdateMay 28, 2025-
Current statusMay 28, 2025Processing site: PDBc / Status: Released

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Structure visualization

Supplemental images

Downloads & links

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Map

FileDownload / File: emd_62040.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Annotationmap
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.07 Å/pix.
x 256 pix.
= 274.432 Å
1.07 Å/pix.
x 256 pix.
= 274.432 Å
1.07 Å/pix.
x 256 pix.
= 274.432 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.072 Å
Density
Contour LevelBy AUTHOR: 0.2
Minimum - Maximum-0.37019855 - 1.3795506
Average (Standard dev.)0.0008056677 (±0.04327012)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 274.432 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_62040_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Additional map: map sharp

Fileemd_62040_additional_1.map
Annotationmap_sharp
Projections & Slices
AxesZYX

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Half map: map half A

Fileemd_62040_half_map_1.map
Annotationmap_half_A
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Half map: map half B

Fileemd_62040_half_map_2.map
Annotationmap_half_B
Projections & Slices
AxesZYX

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Sample components

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Entire : Arabidopsis thaliana H2A-nucleosome with 147bp Widom 601 DNA

EntireName: Arabidopsis thaliana H2A-nucleosome with 147bp Widom 601 DNA
Components
  • Complex: Arabidopsis thaliana H2A-nucleosome with 147bp Widom 601 DNA
    • Protein or peptide: Histone H3.1
    • Protein or peptide: Histone H4
    • Protein or peptide: Histone H2A.6
    • Protein or peptide: Histone H2B.1
    • DNA: Widom 601 DNA (147-MER)
    • DNA: Widom 601 DNA (147-MER)

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Supramolecule #1: Arabidopsis thaliana H2A-nucleosome with 147bp Widom 601 DNA

SupramoleculeName: Arabidopsis thaliana H2A-nucleosome with 147bp Widom 601 DNA
type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Arabidopsis thaliana (thale cress)

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Macromolecule #1: Histone H3.1

MacromoleculeName: Histone H3.1 / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Arabidopsis thaliana (thale cress)
Molecular weightTheoretical: 15.300968 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
MARTKQTARK STGGKAPRKQ LATKAARKSA PATGGVKKPH RFRPGTVALR EIRKYQKSTE LLIRKLPFQR LVREIAQDFK TDLRFQSSA VAALQEAAEA YLVGLFEDTN LCAIHAKRVT IMPKDIQLAR RIRGERA

UniProtKB: Histone H3.1

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Macromolecule #2: Histone H4

MacromoleculeName: Histone H4 / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Arabidopsis thaliana (thale cress)
Molecular weightTheoretical: 11.436467 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
MSGRGKGGKG LGKGGAKRHR KVLRDNIQGI TKPAIRRLAR RGGVKRISGL IYEETRGVLK IFLENVIRDA VTYTEHARRK TVTAMDVVY ALKRQGRTLY GFGG

UniProtKB: Histone H4

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Macromolecule #3: Histone H2A.6

MacromoleculeName: Histone H2A.6 / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Arabidopsis thaliana (thale cress)
Molecular weightTheoretical: 13.680854 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
MAGRGKTLGS GGAKKATSRS SKAGLQFPVG RIARFLKAGK YAERVGAGAP VYLAAVLEYL AAEVLELAGN AARDNKKTRI VPRHIQLAV RNDEELSKLL GDVTIANGGV MPNIHNLLLP KKAGASKPQE D

UniProtKB: Histone H2A.6

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Macromolecule #4: Histone H2B.1

MacromoleculeName: Histone H2B.1 / type: protein_or_peptide / ID: 4 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Arabidopsis thaliana (thale cress)
Molecular weightTheoretical: 16.439291 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
MAPRAEKKPA EKKTAAERPV EENKAAEKAP AEKKPKAGKK LPPKEAGDKK KKRSKKNVET YKIYIFKVLK QVHPDIGISS KAMGIMNSF INDIFEKLAQ ESSKLARYNK KPTITSREIQ TAVRLVLPGE LAKHAVSEGT KAVTKFTSS

UniProtKB: Histone H2B.1

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Macromolecule #5: Widom 601 DNA (147-MER)

MacromoleculeName: Widom 601 DNA (147-MER) / type: dna / ID: 5 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: Arabidopsis thaliana (thale cress)
Molecular weightTheoretical: 45.145754 KDa
SequenceString: (DC)(DT)(DG)(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) ...String:
(DC)(DT)(DG)(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)(DT)(DG)(DT)

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Macromolecule #6: Widom 601 DNA (147-MER)

MacromoleculeName: Widom 601 DNA (147-MER) / type: dna / ID: 6 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: Arabidopsis thaliana (thale cress)
Molecular weightTheoretical: 45.604047 KDa
SequenceString: (DA)(DC)(DA)(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) ...String:
(DA)(DC)(DA)(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)(DC)(DA)(DG)

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration1 mg/mL
BufferpH: 7.4
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
SoftwareName: EPU
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.8 µm / Nominal defocus min: 0.9 µm
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: NONE
Startup modelType of model: NONE
Final reconstructionApplied symmetry - Point group: C2 (2 fold cyclic) / Resolution.type: BY AUTHOR / Resolution: 3.14 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 4.3) / Number images used: 80473
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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