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- EMDB-42690: Heterochromatin protein 1 (HP1) alpha in complex with an H2A.Z nu... -

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Basic information

Entry
Database: EMDB / ID: EMD-42690
TitleHeterochromatin protein 1 (HP1) alpha in complex with an H2A.Z nucleosome(focused refined map)
Map data
Sample
  • Complex: HP1alpha dimer bound to H2A.Z nucleosome
Keywordsheterochromatin / nucleosome / chromatin / GENE REGULATION / STRUCTURAL PROTEIN
Biological speciesEscherichia coli (E. coli)
Methodsingle particle reconstruction / cryo EM / Resolution: 6.6 Å
AuthorsTan D
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R35GM133611 United States
CitationJournal: To Be Published
Title: Structure of human HP1 in complex with H2A.Z nucleosome
Authors: Tan D / Sokolova V
History
DepositionNov 8, 2023-
Header (metadata) releaseSep 25, 2024-
Map releaseSep 25, 2024-
UpdateSep 25, 2024-
Current statusSep 25, 2024Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_42690.png

Downloads & links

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Map

FileDownload / File: emd_42690.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.)
1.08 Å/pix.
x 256 pix.
= 276.48 Å		1.08 Å/pix.
x 256 pix.
= 276.48 Å		1.08 Å/pix.
x 256 pix.
= 276.48 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.08 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.00475
Minimum - Maximum-0.0059201345 - 0.026891233
Average (Standard dev.)-0.000011219434 (±0.0011105298)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 276.48 Å
α=β=γ: 90.0 °

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Supplemental data

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Sample components

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Entire : HP1alpha dimer bound to H2A.Z nucleosome

EntireName: HP1alpha dimer bound to H2A.Z nucleosome
Components
  • Complex: HP1alpha dimer bound to H2A.Z nucleosome

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Supramolecule #1: HP1alpha dimer bound to H2A.Z nucleosome

SupramoleculeName: HP1alpha dimer bound to H2A.Z nucleosome / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1, #3-#6, #10-#11
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 288 MDa

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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: 7.5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
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 / Cs: 2.7 mm / Nominal defocus max: 2.25 µm / Nominal defocus min: 1.0 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: OTHER / Details: Alphafold
Final reconstructionNumber classes used: 1 / Algorithm: BACK PROJECTION / Resolution.type: BY AUTHOR / Resolution: 6.6 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 4.0) / Number images used: 74257
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 4.0)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 4.0)
Final 3D classificationNumber classes: 3 / Avg.num./class: 23000 / Software - Name: RELION (ver. 4.0)

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Atomic model buiding 1

Initial modelPDB ID:

5973


Chain - Source name: AlphaFold / Chain - Initial model type: in silico model
RefinementProtocol: FLEXIBLE FIT

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