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- PDB-6m4h: Structural mechanism of nucleosome dynamics governed by human his... -

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Basic information

Entry
Database: PDB / ID: 6m4h
TitleStructural mechanism of nucleosome dynamics governed by human histone variants H2A.B and H2A.Z.2.2
Components
  • (DNA (103-MER)) x 2
  • Histone H2A-Bbd type 2/3
  • Histone H2B type 2-E
  • Histone H3.1Histone H3
  • Histone H4
KeywordsNUCLEAR PROTEIN / histone / variant / H2A.B / nucleosome
Function / homology
Function and homology information


negative regulation of megakaryocyte differentiation / Packaging Of Telomere Ends / depurination / transcriptionally active chromatin / positive regulation of histone exchange / CENP-A containing chromatin assembly / Chromatin modifying enzymes / 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 ...negative regulation of megakaryocyte differentiation / Packaging Of Telomere Ends / depurination / transcriptionally active chromatin / positive regulation of histone exchange / CENP-A containing chromatin assembly / Chromatin modifying enzymes / 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 / negative regulation of DNA recombination at telomere / DNA replication-independent chromatin assembly / telomere capping / Inhibition of DNA recombination at telomere / Cleavage of the damaged pyrimidine / Recognition and association of DNA glycosylase with site containing an affected pyrimidine / interleukin-7-mediated signaling pathway / Meiotic synapsis / heterochromatin assembly => GO:0031507 / telomere organization / RNA Polymerase I Promoter Opening / SUMOylation of chromatin organization proteins / Interleukin-7 signaling / DNA replication-dependent chromatin assembly / DNA methylation / HCMV Late Events / innate immune response in mucosa / rDNA heterochromatin assembly / SIRT1 negatively regulates rRNA expression / ERCC6 (CSB) and EHMT2 (G9a) positively regulate rRNA expression / Condensation of Prophase Chromosomes / PRC2 methylates histones and DNA / negative regulation of gene expression, epigenetic / regulation of gene silencing / RNA Polymerase I Promoter Escape / mitotic chromosome condensation / regulation of gene silencing by miRNA / HDACs deacetylate histones / nuclear chromosome / Transcriptional regulation by small RNAs / Nonhomologous End-Joining (NHEJ) / NoRC negatively regulates rRNA expression / Formation of the beta-catenin:TCF transactivating complex / B-WICH complex positively regulates rRNA expression / RUNX1 regulates genes involved in megakaryocyte differentiation and platelet function / regulation of megakaryocyte differentiation / DNA-templated transcription, initiation / nucleosome assembly / Activated PKN1 stimulates transcription of AR (androgen receptor) regulated genes KLK2 and KLK3 / DNA Damage/Telomere Stress Induced Senescence / G2/M DNA damage checkpoint / RMTs methylate histone arginines / HCMV Early Events / regulation of androgen receptor signaling pathway / Pre-NOTCH Transcription and Translation / HDMs demethylate histones / PKMTs methylate histone lysines / Meiotic recombination / nucleosome / Activation of anterior HOX genes in hindbrain development during early embryogenesis / Transcriptional regulation of granulopoiesis / mRNA processing / RUNX1 regulates transcription of genes involved in differentiation of HSCs / Recruitment and ATM-mediated phosphorylation of repair and signaling proteins at DNA double strand breaks / double-strand break repair / double-strand break repair via nonhomologous end joining / chromatin organization / Processing of DNA double-strand break ends / Factors involved in megakaryocyte development and platelet production / HATs acetylate histones / Senescence-Associated Secretory Phenotype (SASP) / chromosome, telomeric region / viral life cycle / Oxidative Stress Induced Senescence / antibacterial humoral response / Estrogen-dependent gene expression / antimicrobial humoral immune response mediated by antimicrobial peptide / Ub-specific processing proteases / blood coagulation / cadherin binding / defense response to Gram-positive bacterium / protein heterodimerization activity / Amyloid fiber formation / amyloid fibril formation / protein domain specific binding / protein-containing complex / RNA binding / DNA binding / extracellular space / extracellular exosome / membrane / extracellular region / nucleoplasm / nucleus / cytosol
Similarity search - Function
Histone H2B signature. / Histone H2B / Histone H2B / Histone 2A / Histone H2A / Histone H4 signature. / Histone H4, conserved site / Histone H4 / Histone H4 / CENP-T/Histone H4, histone fold ...Histone H2B signature. / Histone H2B / Histone H2B / Histone 2A / Histone H2A / Histone H4 signature. / Histone H4, conserved site / Histone H4 / Histone H4 / CENP-T/Histone H4, histone fold / Centromere kinetochore component CENP-T histone fold / TATA box binding protein associated factor / TATA box binding protein associated factor (TAF) / Histone H3 signature 1. / Histone H3 signature 2. / Histone H3 / Histone H3/CENP-A / Core histone H2A/H2B/H3/H4 / Histone H2A/H2B/H3 / Histone-fold
Similarity search - Domain/homology
Histone H4 / Histone H3.1 / DNA (> 100) / Histone H2A-Bbd type 2/3 / DNA (> 10) / DNA / Histone H2B type 2-E
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.9 Å
AuthorsZhou, M. / Dai, L.C. / Li, C.M. / Shi, L.X. / Huang, Y. / Guo, Z.Q.
Funding support China, 1items
OrganizationGrant numberCountry
Ministry of Science and Technology (MoST, China) China
CitationJournal: EMBO J / Year: 2021
Title: Structural basis of nucleosome dynamics modulation by histone variants H2A.B and H2A.Z.2.2.
Authors: Min Zhou / Linchang Dai / Chengmin Li / Liuxin Shi / Yan Huang / Zhenqian Guo / Fei Wu / Ping Zhu / Zheng Zhou /
Abstract: Nucleosomes are dynamic entities with wide-ranging compositional variations. Human histone variants H2A.B and H2A.Z.2.2 play critical roles in multiple biological processes by forming unstable ...Nucleosomes are dynamic entities with wide-ranging compositional variations. Human histone variants H2A.B and H2A.Z.2.2 play critical roles in multiple biological processes by forming unstable nucleosomes and open chromatin structures, but how H2A.B and H2A.Z.2.2 confer these dynamic features to nucleosomes remains unclear. Here, we report cryo-EM structures of nucleosome core particles containing human H2A.B (H2A.B-NCP) at atomic resolution, identifying large-scale structural rearrangements in the histone octamer in H2A.B-NCP. H2A.B-NCP compacts approximately 103 bp of DNA wrapping around the core histones in approximately 1.2 left-handed superhelical turns, in sharp contrast to canonical nucleosome encompassing approximately 1.7 turns of DNA. Micrococcal nuclease digestion assay reveals that nineteen H2A.B-specific residues, including a ROF ("regulating-octamer-folding") sequence of six consecutive residues, are responsible for loosening of H2A.B-NCPs. Unlike H2A.B-NCP, the H2A.Z.2.2-containing nucleosome (Z.2.2-NCP) adopts a less-extended structure and compacts around 125 bp of DNA. Further investigation uncovers a crucial role for the H2A.Z.2.2-specific ROF in both H2A.Z.2.2-NCP opening and SWR1-dependent histone replacement. Taken together, these first high-resolution structure of unstable nucleosomes induced by histone H2A variants elucidate specific functions of H2A.B and H2A.Z.2.2 in enhancing chromatin dynamics.
History
DepositionMar 7, 2020Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Sep 23, 2020Provider: repository / Type: Initial release
Revision 1.1Apr 7, 2021Group: 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.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year

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Structure visualization

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Assembly

Deposited unit
I: DNA (103-MER)
J: DNA (103-MER)
A: Histone H3.1
B: Histone H4
C: Histone H2A-Bbd type 2/3
D: Histone H2B type 2-E
E: Histone H3.1
F: Histone H4
G: Histone H2A-Bbd type 2/3
H: Histone H2B type 2-E


Theoretical massNumber of molelcules
Total (without water)197,77910
Polymers197,77910
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: native gel electrophoresis
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area40190 Å2
ΔGint-323 kcal/mol
Surface area57700 Å2

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Components

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DNA chain , 2 types, 2 molecules IJ

#1: DNA chain DNA (103-MER)


Mass: 45610.043 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human)
Production host: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
#2: DNA chain DNA (103-MER)


Mass: 45138.770 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human)
Production host: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)

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Protein , 4 types, 8 molecules AEBFCGDH

#3: Protein Histone H3.1 / Histone H3 / Histone H3/a / Histone H3/b / Histone H3/c / Histone H3/d / Histone H3/f / Histone H3/h / Histone ...Histone H3/a / Histone H3/b / Histone H3/c / Histone H3/d / Histone H3/f / Histone H3/h / Histone H3/i / Histone H3/j / Histone H3/k / Histone H3/l


Mass: 15437.167 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human)
Gene: HIST1H3A, H3FA, HIST1H3B, H3FL, HIST1H3C, H3FC, HIST1H3D, H3FB, HIST1H3E, H3FD, HIST1H3F, H3FI, HIST1H3G, H3FH, HIST1H3H, H3FK, HIST1H3I, H3FF, HIST1H3J, H3FJ
Production host: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
References: UniProt: P68431
#4: 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)
Gene: HIST1H4A, H4/A, H4FA, HIST1H4B, H4/I, H4FI, HIST1H4C, H4/G, H4FG, HIST1H4D, H4/B, H4FB, HIST1H4E, H4/J, H4FJ, HIST1H4F, H4/C, H4FC, HIST1H4H, H4/H, H4FH, HIST1H4I, H4/M, H4FM, HIST1H4J, H4/E, ...Gene: HIST1H4A, H4/A, H4FA, HIST1H4B, H4/I, H4FI, HIST1H4C, H4/G, H4FG, HIST1H4D, H4/B, H4FB, HIST1H4E, H4/J, H4FJ, HIST1H4F, H4/C, H4FC, HIST1H4H, H4/H, H4FH, HIST1H4I, H4/M, H4FM, HIST1H4J, H4/E, H4FE, HIST1H4K, H4/D, H4FD, HIST1H4L, H4/K, H4FK, HIST2H4A, H4/N, H4F2, H4FN, HIST2H4, HIST2H4B, H4/O, H4FO, HIST4H4
Production host: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
References: UniProt: P62805
#5: Protein Histone H2A-Bbd type 2/3 / H2A Barr body-deficient / H2A.Bbd


Mass: 12732.389 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: H2AB2, H2AFB2, H2AB3, H2ABBD, H2AFB, H2AFB3
Production host: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
References: UniProt: P0C5Z0
#6: Protein Histone H2B type 2-E / Histone H2B-GL105 / Histone H2B.q / H2B/q


Mass: 13951.239 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: HIST2H2BE, H2BFQ
Production host: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
References: UniProt: Q16778

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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: H2A.B nucleosome / Type: COMPLEX / Entity ID: #1-#6 / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
Buffer solutionpH: 7.5
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: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K2 QUANTUM (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.16_3549: / Classification: refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 38472 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0094735
ELECTRON MICROSCOPYf_angle_d0.8417303
ELECTRON MICROSCOPYf_dihedral_angle_d39.5552054
ELECTRON MICROSCOPYf_chiral_restr0.045824
ELECTRON MICROSCOPYf_plane_restr0.006206

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