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- EMDB-22792: H1.8 bound nucleosome isolated from metaphase chromosome in Xenop... -

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Basic information

Entry
Database: EMDB / ID: EMD-22792
TitleH1.8 bound nucleosome isolated from metaphase chromosome in Xenopus egg extract (oligo fraction)
Map dataFliped and rescaled map for atomic model creation
Sample
  • Complex: H1.8 bound nucleosome isolated from metaphase chromosome in Xenopus egg extract (oligo fraction)
    • Protein or peptide: Histone H3.2
    • Protein or peptide: Histone H4
    • Protein or peptide: Histone H2A
    • Protein or peptide: Histone H2B 1.1
    • DNA: DNA (184-MER)
    • DNA: DNA (184-MER)
    • Protein or peptide: Protein B4
Keywordsnucleosome / M phase / cell cycle / chromatin / Xenopus egg extract / DNA BINDING PROTEIN / H1 / Chromatosome / Linker histone
Function / homology
Function and homology information


structural constituent of chromatin / nucleosome / nucleosome assembly / protein heterodimerization activity / DNA binding / nucleoplasm / nucleus
Similarity search - Function
linker histone H1 and H5 family / Linker histone H1/H5, domain H15 / Linker histone H1/H5 globular (H15) domain profile. / Domain in histone families 1 and 5 / Histone H2B signature. / Histone H2B / Histone H2B / Histone H2A conserved site / Histone H2A signature. / Histone H2A, C-terminal domain ...linker histone H1 and H5 family / Linker histone H1/H5, domain H15 / Linker histone H1/H5 globular (H15) domain profile. / Domain in histone families 1 and 5 / 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. / TATA box binding protein associated factor / TATA box binding protein associated factor (TAF), histone-like fold domain / 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 / Winged helix DNA-binding domain superfamily / Winged helix-like DNA-binding domain superfamily
Similarity search - Domain/homology
Histone H2B 1.1 / Protein B4 / Histone H4 / Histone H3.2 / Histone H2A
Similarity search - Component
Biological speciesXenopus laevis (African clawed frog)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.42 Å
AuthorsArimura Y / Funabiki H
Funding support United States, Japan, 2 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R35GM132111 United States
Japan Society for the Promotion of Science (JSPS)JSPS Overseas Research Fellowships Japan
CitationJournal: Mol Cell / Year: 2021
Title: Structural features of nucleosomes in interphase and metaphase chromosomes.
Authors: Yasuhiro Arimura / Rochelle M Shih / Ruby Froom / Hironori Funabiki /
Abstract: Structural heterogeneity of nucleosomes in functional chromosomes is unknown. Here, we devise the template-, reference- and selection-free (TRSF) cryo-EM pipeline to simultaneously reconstruct cryo- ...Structural heterogeneity of nucleosomes in functional chromosomes is unknown. Here, we devise the template-, reference- and selection-free (TRSF) cryo-EM pipeline to simultaneously reconstruct cryo-EM structures of protein complexes from interphase or metaphase chromosomes. The reconstructed interphase and metaphase nucleosome structures are on average indistinguishable from canonical nucleosome structures, despite DNA sequence heterogeneity, cell-cycle-specific posttranslational modifications, and interacting proteins. Nucleosome structures determined by a decoy-classifying method and structure variability analyses reveal the nucleosome structural variations in linker DNA, histone tails, and nucleosome core particle configurations, suggesting that the opening of linker DNA, which is correlated with H2A C-terminal tail positioning, is suppressed in chromosomes. High-resolution (3.4-3.5 Å) nucleosome structures indicate DNA-sequence-independent stabilization of superhelical locations ±0-1 and ±3.5-4.5. The linker histone H1.8 preferentially binds to metaphase chromatin, from which chromatosome cryo-EM structures with H1.8 at the on-dyad position are reconstituted. This study presents the structural characteristics of nucleosomes in chromosomes.
History
DepositionOct 2, 2020-
Header (metadata) releaseSep 15, 2021-
Map releaseSep 15, 2021-
UpdateMay 29, 2024-
Current statusMay 29, 2024Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.2
  • Imaged by UCSF Chimera
  • Download
  • Surface view colored by cylindrical radius
  • Surface level: 0.2
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7kbf
  • Surface level: 0.2
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_22792.png

Downloads & links

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Map

FileDownload / File: emd_22792.map.gz / Format: CCP4 / Size: 30.5 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationFliped and rescaled map for atomic model creation
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.47 Å/pix.
x 200 pix.
= 294. Å		1.47 Å/pix.
x 200 pix.
= 294. Å		1.47 Å/pix.
x 200 pix.
= 294. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.47 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.2 / Movie #1: 0.2
Minimum - Maximum-1.0565802 - 1.7124438
Average (Standard dev.)0.00093330065 (±0.063368164)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions200200200
Spacing200200200
CellA=B=C: 294.0 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.471.471.47
M x/y/z200200200
origin x/y/z0.0000.0000.000
length x/y/z294.000294.000294.000
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS200200200
D min/max/mean-1.0571.7120.001

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Supplemental data

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Additional map: The map without flipping and rescaling

Fileemd_22792_additional_1.map
AnnotationThe map without flipping and rescaling
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: H1.8 bound nucleosome isolated from metaphase chromosome in...

Fileemd_22792_half_map_1.map
AnnotationH1.8 bound nucleosome isolated from metaphase chromosome in Xenopus egg extract (oligo fraction)
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: H1.8 bound nucleosome isolated from metaphase chromosome in...

Fileemd_22792_half_map_2.map
AnnotationH1.8 bound nucleosome isolated from metaphase chromosome in Xenopus egg extract (oligo fraction)
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : H1.8 bound nucleosome isolated from metaphase chromosome in Xenop...

EntireName: H1.8 bound nucleosome isolated from metaphase chromosome in Xenopus egg extract (oligo fraction)
Components
  • Complex: H1.8 bound nucleosome isolated from metaphase chromosome in Xenopus egg extract (oligo fraction)
    • Protein or peptide: Histone H3.2
    • Protein or peptide: Histone H4
    • Protein or peptide: Histone H2A
    • Protein or peptide: Histone H2B 1.1
    • DNA: DNA (184-MER)
    • DNA: DNA (184-MER)
    • Protein or peptide: Protein B4

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Supramolecule #1: H1.8 bound nucleosome isolated from metaphase chromosome in Xenop...

SupramoleculeName: H1.8 bound nucleosome isolated from metaphase chromosome in Xenopus egg extract (oligo fraction)
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#7
Source (natural)Organism: Xenopus laevis (African clawed frog)

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Macromolecule #1: Histone H3.2

MacromoleculeName: Histone H3.2 / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Xenopus laevis (African clawed frog)
Molecular weightTheoretical: 15.421101 KDa
SequenceString:
MARTKQTARK STGGKAPRKQ LATKAARKSA PATGGVKKPH RYRPGTVALR EIRRYQKSTE LLIRKLPFQR LVREIAQDFK TDLRFQSSA VMALQEASEA YLVGLFEDTN LCAIHAKRVT IMPKDIQLAR RIRGERA

UniProtKB: Histone H3.2

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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: Xenopus laevis (African clawed frog)
Molecular weightTheoretical: 11.394426 KDa
SequenceString:
MSGRGKGGKG LGKGGAKRHR KVLRDNIQGI TKPAIRRLAR RGGVKRISGL IYEETRGVLK VFLENVIRDA VTYTEHAKRK TVTAMDVVY ALKRQGRTLY GFGG

UniProtKB: Histone H4

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Macromolecule #3: Histone H2A

MacromoleculeName: Histone H2A / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Xenopus laevis (African clawed frog)
Molecular weightTheoretical: 14.883174 KDa
SequenceString:
MSGRGKKVQK AASGKASRSA KAGLQFPVGR IHRLLRKGNY AVRIGSGSAI YLAATLEYLC AEVLELAGNA ARDNKKLRIM PRHIQLAVR NDDELAKLFE GVTIADGGVL PNIQSALLPK KTVKGSSSSQ EPTAVESQEF

UniProtKB: Histone H2A

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Macromolecule #4: Histone H2B 1.1

MacromoleculeName: Histone H2B 1.1 / type: protein_or_peptide / ID: 4 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Xenopus laevis (African clawed frog)
Molecular weightTheoretical: 13.965265 KDa
SequenceString:
MPEPAKSAPA PKKGSKKAVT KTQKKDGKKR RKSRKESYAI YVYKVLKQVH PDTGISSKAM SIMNSFVNDV FERIAGEASR LAHYNKRST ITSREIQTAV RLLLPGELAK HAVSEGTKAV TKYTSAK

UniProtKB: Histone H2B 1.1

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Macromolecule #7: Protein B4

MacromoleculeName: Protein B4 / type: protein_or_peptide / ID: 7 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Xenopus laevis (African clawed frog)
Molecular weightTheoretical: 29.387369 KDa
SequenceString: MAPKKAVAAP EGGNKENAAV KGSSKVKVKR KSIKLVKTQS HPPTLSMVVE VLKKNTERKG TSVQAIRTRI LSAHPTVDPL RLKFLLRTA LNKGLEKGIL IRPLNSSATG ATGRFKLAKP VKTTKAGKEN VASENVDPNA EQETQKKAPK KEKKAKTEKE P KGEKTKAV ...String:
MAPKKAVAAP EGGNKENAAV KGSSKVKVKR KSIKLVKTQS HPPTLSMVVE VLKKNTERKG TSVQAIRTRI LSAHPTVDPL RLKFLLRTA LNKGLEKGIL IRPLNSSATG ATGRFKLAKP VKTTKAGKEN VASENVDPNA EQETQKKAPK KEKKAKTEKE P KGEKTKAV AKKAKEDSDE KPKVAKSKKD KEAKEVDKAN KEAKEVDKAN KEAKEVDKAP AKKPKAKTEA AKAEGGGKAK KE PPKAKAK DVKAQKDSTD EGAPVKAGKK GKKVTN

UniProtKB: Protein B4

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Macromolecule #5: DNA (184-MER)

MacromoleculeName: DNA (184-MER) / type: dna / ID: 5 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: Xenopus laevis (African clawed frog)
Molecular weightTheoretical: 53.114832 KDa
SequenceString: (DT)(DT)(DG)(DG)(DC)(DC)(DA)(DG)(DC)(DT) (DA)(DG)(DG)(DA)(DT)(DA)(DT)(DC)(DA)(DC) (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) ...String:
(DT)(DT)(DG)(DG)(DC)(DC)(DA)(DG)(DC)(DT) (DA)(DG)(DG)(DA)(DT)(DA)(DT)(DC)(DA)(DC) (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)(DG) (DA)(DA)(DT)(DC)(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)(DG)(DT)(DG)(DA)(DT) (DA)(DT) (DC)(DC)(DT)(DA)(DG)(DC)(DT)(DG)(DG)(DC)

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Macromolecule #6: DNA (184-MER)

MacromoleculeName: DNA (184-MER) / type: dna / ID: 6 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: Xenopus laevis (African clawed frog)
Molecular weightTheoretical: 53.083816 KDa
SequenceString: (DG)(DC)(DC)(DA)(DG)(DC)(DT)(DA)(DG)(DG) (DA)(DT)(DA)(DT)(DC)(DA)(DC)(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) ...String:
(DG)(DC)(DC)(DA)(DG)(DC)(DT)(DA)(DG)(DG) (DA)(DT)(DA)(DT)(DC)(DA)(DC)(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)(DG)(DA)(DT)(DT) (DC)(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)(DG) (DT)(DG)(DA)(DT)(DA)(DT)(DC) (DC)(DT) (DA)(DG)(DC)(DT)(DG)(DG)(DC)(DC)(DA)(DA)

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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

BufferpH: 7.4
Component:
ConcentrationNameFormula
10.0 mMHEPES-KOH
30.0 mMKClKCl
1.0 mMEGTAEGTA
0.3 microg/mlLeupeptin
0.3 microg/mlPepstatin
0.3 microg/mlChymostatin
1.0 mMSodium Butyrate
1.0 mMbeta-glycerophosphate
1.0 %trehalose
0.1 %1,6,-hexanediol
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TALOS ARCTICA
Image recording#0 - Image recording ID: 1 / #0 - Film or detector model: GATAN K2 SUMMIT (4k x 4k) / #0 - Detector mode: SUPER-RESOLUTION / #0 - Average electron dose: 38.34 e/Å2 / #1 - Image recording ID: 2 / #1 - Film or detector model: GATAN K2 SUMMIT (4k x 4k) / #1 - Detector mode: SUPER-RESOLUTION / #1 - Average electron dose: 35.27 e/Å2
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company

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Image processing

Image recording ID1
Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 4.42 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 2.14) / Number images used: 27383
Initial angle assignmentType: ANGULAR RECONSTITUTION
Final angle assignmentType: ANGULAR RECONSTITUTION / Software - Name: cryoSPARC (ver. 2.14)
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial model
PDB IDChain

6dzt

source_name: PDB, initial_model_type: experimental model

5nl0

source_name: PDB, initial_model_type: experimental model
Output model

PDB-7kbf:
H1.8 bound nucleosome isolated from metaphase chromosome in Xenopus egg extract (oligo fraction)

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