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- PDB-7dbp: Linker histone defines structure and self-association behaviour o... -
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Basic information
Entry | Database: PDB / ID: 7dbp | |||||||||
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Title | Linker histone defines structure and self-association behaviour of the 177 bp human chromosome | |||||||||
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![]() | STRUCTURAL PROTEIN / chromatin compaction / nucleosome stacking / asymmetric / DNA binding protein | |||||||||
Function / homology | ![]() positive regulation of transcription regulatory region DNA binding / negative regulation of DNA recombination / Apoptosis induced DNA fragmentation / chromosome condensation / Formation of Senescence-Associated Heterochromatin Foci (SAHF) / minor groove of adenine-thymine-rich DNA binding / negative regulation of megakaryocyte differentiation / nucleosome binding / 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 / Formation of Senescence-Associated Heterochromatin Foci (SAHF) / minor groove of adenine-thymine-rich DNA binding / negative regulation of megakaryocyte differentiation / nucleosome binding / protein localization to CENP-A containing chromatin / Chromatin modifying enzymes / Replacement of protamines by nucleosomes in the male pronucleus / 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 / nucleosomal DNA binding / 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 / Inhibition of DNA recombination at telomere / Meiotic synapsis / transcription repressor complex / telomere organization / RNA Polymerase I Promoter Opening / Interleukin-7 signaling / epigenetic regulation of gene expression / Assembly of the ORC complex at the origin of replication / SUMOylation of chromatin organization proteins / DNA methylation / Condensation of Prophase Chromosomes / SIRT1 negatively regulates rRNA expression / ERCC6 (CSB) and EHMT2 (G9a) positively regulate rRNA expression / Chromatin modifications during the maternal to zygotic transition (MZT) / HCMV Late Events / innate immune response in mucosa / PRC2 methylates histones and DNA / Defective pyroptosis / HDACs deacetylate histones / RNA Polymerase I Promoter Escape / Nonhomologous End-Joining (NHEJ) / Transcriptional regulation by small RNAs / Formation of the beta-catenin:TCF transactivating complex / RUNX1 regulates genes involved in megakaryocyte differentiation and platelet function / euchromatin / NoRC negatively regulates rRNA expression / Activated PKN1 stimulates transcription of AR (androgen receptor) regulated genes KLK2 and KLK3 / G2/M DNA damage checkpoint / HDMs demethylate histones / B-WICH complex positively regulates rRNA expression / heterochromatin formation / DNA Damage/Telomere Stress Induced Senescence / chromatin DNA binding / Metalloprotease DUBs / 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 / HCMV Early Events / Transcriptional regulation of granulopoiesis / structural constituent of chromatin / UCH proteinases / antimicrobial humoral immune response mediated by antimicrobial peptide / nucleosome / actin cytoskeleton / nucleosome assembly / E3 ubiquitin ligases ubiquitinate target proteins / Recruitment and ATM-mediated phosphorylation of repair and signaling proteins at DNA double strand breaks / chromatin organization / RUNX1 regulates transcription of genes involved in differentiation of HSCs / Factors involved in megakaryocyte development and platelet production / gene expression / HATs acetylate histones / antibacterial humoral response / Processing of DNA double-strand break ends / Senescence-Associated Secretory Phenotype (SASP) / double-stranded DNA binding / Oxidative Stress Induced Senescence / defense response to Gram-negative bacterium / Estrogen-dependent gene expression / killing of cells of another organism / chromosome, telomeric region / nuclear body / Ub-specific processing proteases / defense response to Gram-positive bacterium / cadherin binding / protein heterodimerization activity / Amyloid fiber formation / negative regulation of cell population proliferation / chromatin / Golgi apparatus / protein-containing complex / DNA binding / RNA binding / extracellular space / extracellular exosome / extracellular region / nucleoplasm / membrane / nucleus Similarity search - Function | |||||||||
Biological species | ![]() synthetic construct (others) | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.5 Å | |||||||||
![]() | Wang, S. / Vogirala, K.V. / Soman, A. / Liu, Z.B. | |||||||||
Funding support | ![]()
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![]() | ![]() 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 |
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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PDBx/mmCIF format | ![]() | 367.6 KB | Display | ![]() |
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PDB format | ![]() | 281.2 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 30161MC M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
-Protein , 5 types, 9 molecules KAEBFCGDH
#1: Protein | Mass: 22871.307 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() | ||||||
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#2: Protein | Mass: 15437.167 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #3: Protein | Mass: 11394.426 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #4: Protein | Mass: 14165.551 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #5: Protein | Mass: 13921.213 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
-DNA chain , 2 types, 2 molecules IJ
#6: DNA chain | Mass: 54414.652 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others) |
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#7: DNA chain | Mass: 54872.953 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others) |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: ternary complex of 177bp nucleosome with linker histone H1-0 Type: COMPLEX / Entity ID: all / Source: RECOMBINANT |
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Molecular weight | Value: 0.242 MDa / Experimental value: NO |
Source (natural) | Organism: ![]() |
Source (recombinant) | Organism: ![]() ![]() |
Buffer solution | pH: 7.5 |
Specimen | Conc.: 0.58 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD |
Image recording | Electron dose: 80 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
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Processing
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
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3D reconstruction | Resolution: 4.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 46196 / Symmetry type: POINT | ||||||||||||||||||||||||
Refinement | Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||
Displacement parameters | Biso mean: 272.68 Å2 | ||||||||||||||||||||||||
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