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- PDB-7va4: Telomeric tetranucleosome in open state -

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Basic information

Entry
Database: PDB / ID: 7va4
TitleTelomeric tetranucleosome in open state
Components
  • (DNA (539-MER)) x 2
  • Histone H2A type 1-B/E
  • Histone H2B type 1-K
  • Histone H3.1
  • Histone H4
KeywordsDNA BINDING PROTEIN/DNA / Telomere / Nucleosome / Chromatin / DNA BINDING PROTEIN / DNA BINDING PROTEIN-DNA complex
Function / homology
Function and homology information


protein localization to CENP-A containing chromatin / CENP-A containing nucleosome / Replacement of protamines by nucleosomes in the male pronucleus / arachidonate 15-lipoxygenase / arachidonate 15-lipoxygenase activity / Packaging Of Telomere Ends / lipoxygenase pathway / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / telomere organization ...protein localization to CENP-A containing chromatin / CENP-A containing nucleosome / Replacement of protamines by nucleosomes in the male pronucleus / arachidonate 15-lipoxygenase / arachidonate 15-lipoxygenase activity / Packaging Of Telomere Ends / lipoxygenase pathway / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / telomere organization / arachidonate metabolic process / Chromatin modifying enzymes / lipid oxidation / Deposition of new CENPA-containing nucleosomes at the centromere / hepoxilin biosynthetic process / Recognition and association of DNA glycosylase with site containing an affected pyrimidine / Cleavage of the damaged pyrimidine / linoleic acid metabolic process / Meiotic synapsis / Inhibition of DNA recombination at telomere / nucleosomal DNA binding / RNA Polymerase I Promoter Opening / Assembly of the ORC complex at the origin of replication / Interleukin-7 signaling / epigenetic regulation of gene expression / DNA methylation / Condensation of Prophase Chromosomes / HCMV Late Events / SIRT1 negatively regulates rRNA expression / Chromatin modifications during the maternal to zygotic transition (MZT) / ERCC6 (CSB) and EHMT2 (G9a) positively regulate rRNA expression / PRC2 methylates histones and DNA / Defective pyroptosis / Meiotic recombination / innate immune response in mucosa / DNA Damage/Telomere Stress Induced Senescence / HDACs deacetylate histones / Nonhomologous End-Joining (NHEJ) / RNA Polymerase I Promoter Escape / Transcriptional regulation by small RNAs / Transcriptional regulation of granulopoiesis / HDMs demethylate histones / Formation of the beta-catenin:TCF transactivating complex / HCMV Early Events / RUNX1 regulates genes involved in megakaryocyte differentiation and platelet function / G2/M DNA damage checkpoint / NoRC negatively regulates rRNA expression / Activated PKN1 stimulates transcription of AR (androgen receptor) regulated genes KLK2 and KLK3 / PKMTs methylate histone lysines / B-WICH complex positively regulates rRNA expression / heterochromatin formation / RMTs methylate histone arginines / Pre-NOTCH Transcription and Translation / Metalloprotease DUBs / Activation of anterior HOX genes in hindbrain development during early embryogenesis / structural constituent of chromatin / UCH proteinases / nucleosome / antimicrobial humoral immune response mediated by antimicrobial peptide / Factors involved in megakaryocyte development and platelet production / Processing of DNA double-strand break ends / nucleosome assembly / Recruitment and ATM-mediated phosphorylation of repair and signaling proteins at DNA double strand breaks / chromatin organization / E3 ubiquitin ligases ubiquitinate target proteins / Senescence-Associated Secretory Phenotype (SASP) / RUNX1 regulates transcription of genes involved in differentiation of HSCs / HATs acetylate histones / gene expression / antibacterial humoral response / Oxidative Stress Induced Senescence / defense response to Gram-negative bacterium / Estrogen-dependent gene expression / killing of cells of another organism / Ub-specific processing proteases / defense response to Gram-positive bacterium / cadherin binding / protein heterodimerization activity / Amyloid fiber formation / negative regulation of cell population proliferation / protein-containing complex / DNA binding / extracellular space / extracellular exosome / extracellular region / nucleoplasm / membrane / nucleus / metal ion binding / cytosol
Similarity search - Function
Lipoxygenase, iron binding site / Lipoxygenases iron-binding region signature 1. / Lipoxygenase / Lipoxygenase, C-terminal / Lipoxigenase, C-terminal domain superfamily / Lipoxygenase / Lipoxygenase iron-binding catalytic domain profile. / Histone H2B signature. / Histone H2B / Histone H2B ...Lipoxygenase, iron binding site / Lipoxygenases iron-binding region signature 1. / Lipoxygenase / Lipoxygenase, C-terminal / Lipoxigenase, C-terminal domain superfamily / Lipoxygenase / Lipoxygenase iron-binding catalytic domain profile. / 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 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 type 1-K / Histone H2A type 1-B/E / Arachidonate 15-lipoxygenase / Histone H3.1
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 14 Å
AuthorsSoman, A.
Funding support Singapore, 1items
OrganizationGrant numberCountry
Ministry of Education (MoE, Singapore) Singapore
CitationJournal: Nature / Year: 2022
Title: Columnar structure of human telomeric chromatin.
Authors: Aghil Soman / Sook Yi Wong / Nikolay Korolev / Wahyu Surya / Simon Lattmann / Vinod K Vogirala / Qinming Chen / Nikolay V Berezhnoy / John van Noort / Daniela Rhodes / Lars Nordenskiöld /
Abstract: Telomeres, the ends of eukaryotic chromosomes, play pivotal parts in ageing and cancer and are targets of DNA damage and the DNA damage response. Little is known about the structure of telomeric ...Telomeres, the ends of eukaryotic chromosomes, play pivotal parts in ageing and cancer and are targets of DNA damage and the DNA damage response. Little is known about the structure of telomeric chromatin at the molecular level. Here we used negative stain electron microscopy and single-molecule magnetic tweezers to characterize 3-kbp-long telomeric chromatin fibres. We also obtained the cryogenic electron microscopy structure of the condensed telomeric tetranucleosome and its dinucleosome unit. The structure displayed close stacking of nucleosomes with a columnar arrangement, and an unusually short nucleosome repeat  length that comprised about 132 bp DNA wound in a continuous superhelix around histone octamers. This columnar structure is primarily stabilized by the H2A carboxy-terminal and histone amino-terminal tails in a synergistic manner. The columnar conformation results in exposure of the DNA helix, which may make it susceptible to both DNA damage and the DNA damage response. The conformation also exists in an alternative open state, in which one nucleosome is unstacked and flipped out, which exposes the acidic patch of the histone surface. The structural features revealed in this work suggest mechanisms by which protein factors involved in telomere maintenance can access telomeric chromatin in its compact form.
History
DepositionAug 27, 2021Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Jul 27, 2022Provider: repository / Type: Initial release
Revision 1.1Sep 21, 2022Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.title / _citation.year / _citation_author.identifier_ORCID / _citation_author.name
Revision 1.2Oct 5, 2022Group: Database references / Category: citation / Item: _citation.pdbx_database_id_PubMed / _citation.title
Revision 1.3Oct 12, 2022Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last
Revision 1.4Jun 19, 2024Group: Data collection / Category: chem_comp_atom / chem_comp_bond

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
I: DNA (539-MER)
J: DNA (539-MER)
A: Histone H3.1
B: Histone H4
C: Histone H2A type 1-B/E
D: Histone H2B type 1-K
E: Histone H3.1
F: Histone H4
G: Histone H2A type 1-B/E
H: Histone H2B type 1-K
K: Histone H3.1
L: Histone H4
M: Histone H2A type 1-B/E
N: Histone H2B type 1-K
O: Histone H3.1
P: Histone H4
Q: Histone H2A type 1-B/E
R: Histone H2B type 1-K
S: Histone H3.1
T: Histone H4
U: Histone H2A type 1-B/E
V: Histone H2B type 1-K
W: Histone H3.1
X: Histone H4
Y: Histone H2A type 1-B/E
Z: Histone H2B type 1-K
a: Histone H3.1
b: Histone H4
c: Histone H2A type 1-B/E
d: Histone H2B type 1-K
e: Histone H3.1
f: Histone H4
g: Histone H2A type 1-B/E
h: Histone H2B type 1-K


Theoretical massNumber of molelcules
Total (without water)745,81334
Polymers745,81334
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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DNA chain , 2 types, 2 molecules IJ

#1: DNA chain DNA (539-MER)


Mass: 171470.156 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli)
#2: DNA chain DNA (539-MER)


Mass: 161508.312 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli)

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Protein , 4 types, 32 molecules AEKOSWaeBFLPTXbfCGMQUYcgDHNRVZdh

#3: Protein
Histone H3.1


Mass: 15437.167 Da / Num. of mol.: 8
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli) / References: UniProt: P68431
#4: Protein
Histone H4


Mass: 11394.426 Da / Num. of mol.: 8
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli) / References: UniProt: P62805
#5: Protein
Histone H2A type 1-B/E


Mass: 14165.551 Da / Num. of mol.: 8
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli) / References: UniProt: P04908
#6: Protein
Histone H2B type 1-K / H2B K / HIRA-interacting protein 1


Mass: 10607.174 Da / Num. of mol.: 8
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: H2BC12, H2BFT, HIRIP1, HIST1H2BK / Production host: Escherichia coli (E. coli) / References: UniProt: O60814

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Experimental details

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Experiment

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

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Sample preparation

ComponentName: Telomeric tetranucleosome in open state / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 6
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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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: OTHER
Electron lensMode: BRIGHT FIELD
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 14 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 5305 / Symmetry type: POINT

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