[English] 日本語
Yorodumi
- PDB-8uxq: Structure of Heterochromatin Protein 1 (HP1) alpha in complex wit... -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: PDB / ID: 8uxq
TitleStructure of Heterochromatin Protein 1 (HP1) alpha in complex with an H2A.Z nucleosome
Components
  • (DNA Widom601 (208bp) ...) x 2
  • Chromobox protein homolog 5
  • Histone H2A.Z
  • Histone H2B 1.1
  • Histone H3.2
  • Histone H4
KeywordsSTRUCTURAL PROTEIN / heterochromatin / nucleosome / chromatin / GENE REGULATION
Function / homology
Function and homology information


chromocenter / nucleosomal DNA binding / histone methyltransferase complex / Transcriptional Regulation by E2F6 / site of DNA damage / histone deacetylase complex / ribonucleoprotein complex binding / heterochromatin / pericentric heterochromatin / RNA polymerase II core promoter sequence-specific DNA binding ...chromocenter / nucleosomal DNA binding / histone methyltransferase complex / Transcriptional Regulation by E2F6 / site of DNA damage / histone deacetylase complex / ribonucleoprotein complex binding / heterochromatin / pericentric heterochromatin / RNA polymerase II core promoter sequence-specific DNA binding / : / transcription repressor complex / SUMOylation of chromatin organization proteins / Regulation of endogenous retroelements by KRAB-ZFP proteins / cellular response to estradiol stimulus / euchromatin / kinetochore / histone deacetylase binding / structural constituent of chromatin / nucleosome / nuclear envelope / heterochromatin formation / nucleosome assembly / chromatin organization / Factors involved in megakaryocyte development and platelet production / protein-macromolecule adaptor activity / DNA-binding transcription factor binding / chromosome, telomeric region / RNA polymerase II cis-regulatory region sequence-specific DNA binding / protein heterodimerization activity / ribonucleoprotein complex / negative regulation of DNA-templated transcription / DNA damage response / chromatin binding / protein-containing complex binding / nucleolus / negative regulation of transcription by RNA polymerase II / positive regulation of transcription by RNA polymerase II / protein-containing complex / DNA binding / nucleoplasm / identical protein binding / nucleus
Similarity search - Function
Chromo shadow domain / Chromo shadow domain / Chromo Shadow Domain / : / Chromo domain subgroup / Chromo domain, conserved site / Chromo domain signature. / Chromo domain / Chromo (CHRromatin Organisation MOdifier) domain / Chromo and chromo shadow domain profile. ...Chromo shadow domain / Chromo shadow domain / Chromo Shadow Domain / : / Chromo domain subgroup / Chromo domain, conserved site / Chromo domain signature. / Chromo domain / Chromo (CHRromatin Organisation MOdifier) domain / Chromo and chromo shadow domain profile. / Chromo/chromo shadow domain / Chromatin organization modifier domain / Chromo-like domain superfamily / : / 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 / TATA box binding protein associated factor / TATA box binding protein associated factor (TAF), histone-like fold domain / 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
DNA / DNA (> 10) / DNA (> 100) / Histone H2B 1.1 / Histone H2A.Z / Chromobox protein homolog 5 / Histone H4 / Histone H3.2
Similarity search - Component
Biological speciesHomo sapiens (human)
Xenopus laevis (African clawed frog)
Mus musculus (house mouse)
synthetic construct (others)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 6.3 Å
AuthorsTan, D. / Sokolova, V.
Funding support United States, 2items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R35GM133611 United States
National Science Foundation (NSF, United States)1942049 United States
CitationJournal: Structure / Year: 2024
Title: Structural mechanism of HP1⍺-dependent transcriptional repression and chromatin compaction.
Authors: Vladyslava Sokolova / Jacob Miratsky / Vladimir Svetlov / Michael Brenowitz / John Vant / Tyler S Lewis / Kelly Dryden / Gahyun Lee / Shayan Sarkar / Evgeny Nudler / Abhishek Singharoy / Dongyan Tan /
Abstract: Heterochromatin protein 1 (HP1) plays a central role in establishing and maintaining constitutive heterochromatin. However, the mechanisms underlying HP1-nucleosome interactions and their ...Heterochromatin protein 1 (HP1) plays a central role in establishing and maintaining constitutive heterochromatin. However, the mechanisms underlying HP1-nucleosome interactions and their contributions to heterochromatin functions remain elusive. Here, we present the cryoelectron microscopy (cryo-EM) structure of an HP1α dimer bound to an H2A.Z-nucleosome, revealing two distinct HP1α-nucleosome interfaces. The primary HP1α binding site is located at the N terminus of histone H3, specifically at the trimethylated lysine 9 (K9me3) region, while a secondary binding site is situated near histone H2B, close to nucleosome superhelical location 4 (SHL4). Our biochemical data further demonstrates that HP1α binding influences the dynamics of DNA on the nucleosome. It promotes DNA unwrapping near the nucleosome entry and exit sites while concurrently restricting DNA accessibility in the vicinity of SHL4. Our study offers a model for HP1α-mediated heterochromatin maintenance and gene silencing. It also sheds light on the H3K9me-independent role of HP1 in responding to DNA damage.
History
DepositionNov 9, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0Sep 25, 2024Provider: repository / Type: Initial release
Revision 1.1Apr 9, 2025Group: Data collection / Database references / Structure summary
Category: citation / citation_author ...citation / citation_author / em_admin / pdbx_entry_details
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _em_admin.last_update / _pdbx_entry_details.has_protein_modification

-
Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

-
Assembly

Deposited unit
A: Chromobox protein homolog 5
C: Chromobox protein homolog 5
E: Histone H3.2
F: Histone H4
G: Histone H2A.Z
H: Histone H2B 1.1
K: Histone H3.2
L: Histone H4
M: Histone H2A.Z
N: Histone H2B 1.1
I: DNA Widom601 (208bp) strand1
J: DNA Widom601 (208bp) strand2


Theoretical massNumber of molelcules
Total (without water)281,47912
Polymers281,47912
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

-
Components

-
Protein , 5 types, 10 molecules ACEKFLGMHN

#1: Protein Chromobox protein homolog 5 / Antigen p25 / Heterochromatin protein 1 homolog alpha / HP1 alpha


Mass: 22651.398 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CBX5, HP1A / Production host: Escherichia coli (E. coli) / References: UniProt: P45973
#2: Protein Histone H3.2 / Histone H3


Mass: 15303.930 Da / Num. of mol.: 2 / Mutation: C110A
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Xenopus laevis (African clawed frog) / Production host: Escherichia coli (E. coli) / References: UniProt: P84233
#3: Protein Histone H4


Mass: 11263.231 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Xenopus laevis (African clawed frog) / Production host: Escherichia coli (E. coli) / References: UniProt: P62799
#4: Protein Histone H2A.Z / H2A/z


Mass: 13450.601 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Gene: H2az1, H2afz, H2az / Production host: Escherichia coli (E. coli) / References: UniProt: P0C0S6
#5: Protein Histone H2B 1.1 / H2B1.1


Mass: 13848.097 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Xenopus laevis (African clawed frog) / Production host: Escherichia coli (E. coli) / References: UniProt: P02281

-
DNA Widom601 (208bp) ... , 2 types, 2 molecules IJ

#6: DNA chain DNA Widom601 (208bp) strand1


Mass: 64456.039 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)
#7: DNA chain DNA Widom601 (208bp) strand2


Mass: 63988.711 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)

-
Details

Has ligand of interestY
Has protein modificationN

-
Experimental details

-
Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

-
Sample preparation

ComponentName: HP1alpha dimer bound to H2A.Z nucleosome / Type: COMPLEX / Entity ID: all / Source: MULTIPLE SOURCES
Molecular weightValue: 0.288 MDa / Experimental value: NO
Source (natural)Organism: Escherichia coli (E. coli)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 400 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK III / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 39.2 K

-
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 / Calibrated magnification: 81000 X / Nominal defocus max: 2250 nm / Nominal defocus min: 1000 nm / Cs: 2.7 mm / C2 aperture diameter: 100 µm
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)
EM imaging opticsEnergyfilter name: GIF Bioquantum / Energyfilter slit width: 10 eV

-
Processing

EM software
IDNameVersionCategory
2EPUimage acquisition
7MDFFmodel fitting
9MDFFmodel refinement
12RELION4classification
13RELION43D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 6.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 74257 / Algorithm: BACK PROJECTION / Num. of class averages: 1 / Symmetry type: POINT
Atomic model buildingProtocol: FLEXIBLE FIT / Target criteria: Cross-correlation coefficient
Atomic model buildingAccession code: P45973 / Source name: AlphaFold / Type: in silico model

+
About Yorodumi

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242)：Coronavirus Proteases

+
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)

EMDB accession codes are about to change! (news from PDBe EMDB page)

  • The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
  • The EM Navigator/Yorodumi systems omit the EMD- prefix.

Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi

Thousand views of thousand structures

  • Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
  • This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
  • The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.

Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi

Read more