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Entry
Database: PDB / ID: 7dbp
TitleLinker histone defines structure and self-association behaviour of the 177 bp human chromosome
Components
  • (DNA (175-MER)) x 2
  • Histone H1.0
  • Histone H2A type 1-B/E
  • Histone H2B type 1-K
  • Histone H3.1
  • Histone H4
KeywordsSTRUCTURAL PROTEIN / chromatin compaction / nucleosome stacking / asymmetric / DNA binding protein
Function / homology
Function and homology information


positive regulation of transcription regulatory region DNA binding / negative regulation of DNA recombination / Apoptosis induced DNA fragmentation / chromosome condensation / nucleosomal DNA binding / Formation of Senescence-Associated Heterochromatin Foci (SAHF) / minor groove of adenine-thymine-rich DNA binding / negative regulation of megakaryocyte differentiation / protein localization to CENP-A containing chromatin / Chromatin modifying enzymes ...positive regulation of transcription regulatory region DNA binding / negative regulation of DNA recombination / Apoptosis induced DNA fragmentation / chromosome condensation / nucleosomal DNA binding / Formation of Senescence-Associated Heterochromatin Foci (SAHF) / minor groove of adenine-thymine-rich DNA binding / negative regulation of megakaryocyte differentiation / protein localization to CENP-A containing chromatin / Chromatin modifying enzymes / Replacement of protamines by nucleosomes in the male pronucleus / nucleosome binding / CENP-A containing nucleosome / Packaging Of Telomere Ends / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / Deposition of new CENPA-containing nucleosomes at the centromere / Recognition and association of DNA glycosylase with site containing an affected pyrimidine / Cleavage of the damaged pyrimidine / transcription repressor complex / telomere organization / Interleukin-7 signaling / Inhibition of DNA recombination at telomere / RNA Polymerase I Promoter Opening / Meiotic synapsis / Assembly of the ORC complex at the origin of replication / SUMOylation of chromatin organization proteins / Regulation of endogenous retroelements by the Human Silencing Hub (HUSH) complex / DNA methylation / Condensation of Prophase Chromosomes / Chromatin modifications during the maternal to zygotic transition (MZT) / epigenetic regulation of gene expression / HCMV Late Events / SIRT1 negatively regulates rRNA expression / ERCC6 (CSB) and EHMT2 (G9a) positively regulate rRNA expression / PRC2 methylates histones and DNA / innate immune response in mucosa / Regulation of endogenous retroelements by KRAB-ZFP proteins / Defective pyroptosis / HDMs demethylate histones / Regulation of endogenous retroelements by Piwi-interacting RNAs (piRNAs) / HDACs deacetylate histones / RNA Polymerase I Promoter Escape / Nonhomologous End-Joining (NHEJ) / Transcriptional regulation by small RNAs / chromatin DNA binding / Formation of the beta-catenin:TCF transactivating complex / RUNX1 regulates genes involved in megakaryocyte differentiation and platelet function / Activated PKN1 stimulates transcription of AR (androgen receptor) regulated genes KLK2 and KLK3 / euchromatin / G2/M DNA damage checkpoint / Metalloprotease DUBs / NoRC negatively regulates rRNA expression / DNA Damage/Telomere Stress Induced Senescence / B-WICH complex positively regulates rRNA expression / PKMTs methylate histone lysines / Meiotic recombination / Pre-NOTCH Transcription and Translation / RMTs methylate histone arginines / Activation of anterior HOX genes in hindbrain development during early embryogenesis / Transcriptional regulation of granulopoiesis / UCH proteinases / HCMV Early Events / antimicrobial humoral immune response mediated by antimicrobial peptide / structural constituent of chromatin / antibacterial humoral response / E3 ubiquitin ligases ubiquitinate target proteins / Recruitment and ATM-mediated phosphorylation of repair and signaling proteins at DNA double strand breaks / nucleosome / heterochromatin formation / RUNX1 regulates transcription of genes involved in differentiation of HSCs / nucleosome assembly / actin cytoskeleton / Processing of DNA double-strand break ends / HATs acetylate histones / chromatin organization / Senescence-Associated Secretory Phenotype (SASP) / Factors involved in megakaryocyte development and platelet production / MLL4 and MLL3 complexes regulate expression of PPARG target genes in adipogenesis and hepatic steatosis / double-stranded DNA binding / Oxidative Stress Induced Senescence / defense response to Gram-negative bacterium / Estrogen-dependent gene expression / killing of cells of another organism / gene expression / chromosome, telomeric region / Ub-specific processing proteases / defense response to Gram-positive bacterium / nuclear body / cadherin binding / Amyloid fiber formation / protein heterodimerization activity / negative regulation of cell population proliferation / chromatin / Golgi apparatus / protein-containing complex / extracellular space / DNA binding / RNA binding / extracellular exosome
Similarity search - Function
Linker histone H1/H5 / 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 H2A conserved site / Histone H2A signature. / Histone H2B ...Linker histone H1/H5 / 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 H2A conserved site / Histone H2A signature. / Histone H2B / Histone H2B / Histone H2A, C-terminal domain / C-terminus of histone H2A / Histone 2A / Histone H2A / 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 / Winged helix DNA-binding domain superfamily / Winged helix-like DNA-binding domain superfamily
Similarity search - Domain/homology
DNA / DNA (> 10) / DNA (> 100) / Histone H2B type 1-K / Histone H2A type 1-B/E / Histone H1.0 / Histone H4 / Histone H3.1
Similarity search - Component
Biological speciesHomo sapiens (human)
synthetic construct (others)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.5 Å
AuthorsWang, S. / Vogirala, K.V. / Soman, A. / Liu, Z.B.
Funding support Singapore, 2items
OrganizationGrant numberCountry
Ministry of Education (MoE, Singapore)MOE2012-T3-1-001 Singapore
Ministry of Education (MoE, Singapore)2014-T1-001-134 Singapore
CitationJournal: Sci Rep / Year: 2021
Title: Linker histone defines structure and self-association behaviour of the 177 bp human chromatosome.
Authors: Sai Wang / Vinod K Vogirala / Aghil Soman / Nikolay V Berezhnoy / Zhehui Barry Liu / Andrew S W Wong / Nikolay Korolev / Chun-Jen Su / Sara Sandin / Lars Nordenskiöld /
Abstract: Linker histones play essential roles in the regulation and maintenance of the dynamic chromatin structure of higher eukaryotes. The influence of human histone H1.0 on the nucleosome structure and ...Linker histones play essential roles in the regulation and maintenance of the dynamic chromatin structure of higher eukaryotes. The influence of human histone H1.0 on the nucleosome structure and biophysical properties of the resulting chromatosome were investigated and compared with the 177-bp nucleosome using Cryo-EM and SAXS. The 4.5 Å Cryo-EM chromatosome structure showed that the linker histone binds at the nucleosome dyad interacting with both linker DNA arms but in a tilted manner leaning towards one of the linker sides. The chromatosome is laterally compacted and rigid in the dyad and linker DNA area, in comparison with the nucleosome where linker DNA region is more flexible and displays structural variability. In solution, the chromatosomes appear slightly larger than the nucleosomes, with the volume increase compared to the bound linker histone, according to solution SAXS measurements. SAXS X-ray diffraction characterisation of Mg-precipitated samples showed that the different shapes of the 177 chromatosome enabled the formation of a highly ordered lamello-columnar phase when precipitated by Mg, indicating the influence of linker histone on the nucleosome stacking. The biological significance of linker histone, therefore, may be affected by the change in the polyelectrolyte and DNA conformation properties of the chromatosomes, in comparison to nucleosomes.
History
DepositionOct 21, 2020Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Dec 23, 2020Provider: repository / Type: Initial release
Revision 1.1Jan 27, 2021Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _citation_author.identifier_ORCID
Revision 1.2Mar 27, 2024Group: Data collection / Database references / Category: chem_comp_atom / chem_comp_bond / database_2
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Structure visualization

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Assembly

Deposited unit
K: Histone H1.0
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
I: DNA (175-MER)
J: DNA (175-MER)


Theoretical massNumber of molelcules
Total (without water)241,99611
Polymers241,99611
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: native gel electrophoresis
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area54230 Å2
ΔGint-318 kcal/mol
Surface area99830 Å2

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Components

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Protein , 5 types, 9 molecules KAEBFCGDH

#1: Protein Histone H1.0


Mass: 22871.307 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) / References: UniProt: P07305
#2: Protein Histone H3.1


Mass: 15437.167 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli) / References: UniProt: P68431
#3: Protein Histone H4


Mass: 11394.426 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli) / References: UniProt: P62805
#4: Protein Histone H2A type 1-B/E


Mass: 14165.551 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli) / References: UniProt: P04908
#5: Protein Histone H2B type 1-K


Mass: 13921.213 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli) / References: UniProt: O60814

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DNA chain , 2 types, 2 molecules IJ

#6: DNA chain DNA (175-MER)


Mass: 54414.652 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)
#7: DNA chain DNA (175-MER)


Mass: 54872.953 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)

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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: ternary complex of 177bp nucleosome with linker histone H1-0
Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Molecular weightValue: 0.242 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.5
SpecimenConc.: 0.58 mg/ml / Embedding 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: 80 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: 4.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 46196 / Symmetry type: POINT
RefinementStereochemistry target values: GeoStd + Monomer Library + CDL v1.2
Displacement parametersBiso mean: 272.68 Å2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.002514760
ELECTRON MICROSCOPYf_angle_d0.436721429
ELECTRON MICROSCOPYf_chiral_restr0.02842434
ELECTRON MICROSCOPYf_plane_restr0.00271497
ELECTRON MICROSCOPYf_dihedral_angle_d27.74156107

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