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Open data
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Basic information
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Title | Telomeric Dinucleosome | |||||||||
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Function / homology | ![]() heterochromatin organization / negative regulation of megakaryocyte differentiation / nucleosomal DNA binding / protein localization to CENP-A containing chromatin / Chromatin modifying enzymes / Replacement of protamines by nucleosomes in the male pronucleus / CENP-A containing nucleosome / epigenetic regulation of gene expression / Packaging Of Telomere Ends / Recognition and association of DNA glycosylase with site containing an affected purine ...heterochromatin organization / negative regulation of megakaryocyte differentiation / nucleosomal DNA binding / protein localization to CENP-A containing chromatin / Chromatin modifying enzymes / Replacement of protamines by nucleosomes in the male pronucleus / CENP-A containing nucleosome / epigenetic regulation of gene expression / 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 / Inhibition of DNA recombination at telomere / Meiotic synapsis / telomere organization / RNA Polymerase I Promoter Opening / Interleukin-7 signaling / Assembly of the ORC complex at the origin of replication / SUMOylation of chromatin organization proteins / ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | |||||||||
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Method | ![]() ![]() | |||||||||
![]() | Soman A | |||||||||
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![]() | ![]() 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. | |||||||||
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Structure visualization
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Downloads & links
-EMDB archive
Map data | ![]() | 59 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 20.3 KB 20.3 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 9.2 KB | Display | ![]() |
Images | ![]() | 30.3 KB | ||
Masks | ![]() | 64 MB | ![]() | |
Filedesc metadata | ![]() | 5.6 KB | ||
Others | ![]() ![]() | 48.5 MB 48.5 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7v96MC ![]() 7v90C ![]() 7v9cC ![]() 7v9jC ![]() 7v9kC ![]() 7v9sC ![]() 7va4C C: citing same article ( M: atomic model generated by this map |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Voxel size | X=Y=Z: 0.858 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Mask #1
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-Half map: #2
File | emd_31810_half_map_1.map | ||||||||||||
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Density Histograms |
-Half map: #1
File | emd_31810_half_map_2.map | ||||||||||||
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Sample components
-Entire : Telomeric Dinucleosome
Entire | Name: Telomeric Dinucleosome |
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Components |
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-Supramolecule #1: Telomeric Dinucleosome
Supramolecule | Name: Telomeric Dinucleosome / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() ![]() |
-Macromolecule #1: DNA (275-mer)
Macromolecule | Name: DNA (275-mer) / type: dna / ID: 1 / Number of copies: 1 / Classification: DNA |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 87.465484 KDa |
Sequence | String: (DG)(DG)(DG)(DT)(DT)(DA)(DG)(DG)(DG)(DT) (DT)(DA)(DG)(DG)(DG)(DT)(DT)(DA)(DG)(DG) (DG)(DT)(DT)(DA)(DG)(DG)(DG)(DT)(DT) (DA)(DG)(DG)(DG)(DT)(DT)(DA)(DG)(DG)(DG) (DT) (DT)(DA)(DG)(DG)(DG)(DT) ...String: (DG)(DG)(DG)(DT)(DT)(DA)(DG)(DG)(DG)(DT) (DT)(DA)(DG)(DG)(DG)(DT)(DT)(DA)(DG)(DG) (DG)(DT)(DT)(DA)(DG)(DG)(DG)(DT)(DT) (DA)(DG)(DG)(DG)(DT)(DT)(DA)(DG)(DG)(DG) (DT) (DT)(DA)(DG)(DG)(DG)(DT)(DT)(DA) (DG)(DG)(DG)(DT)(DT)(DA)(DG)(DG)(DG)(DT) (DT)(DA) (DG)(DG)(DG)(DT)(DT)(DA)(DG) (DG)(DG)(DT)(DT)(DA)(DG)(DG)(DG)(DT)(DT) (DA)(DG)(DG) (DG)(DT)(DT)(DA)(DG)(DG) (DG)(DT)(DT)(DA)(DG)(DG)(DG)(DT)(DT)(DA) (DG)(DG)(DG)(DT) (DT)(DA)(DG)(DG)(DG) (DT)(DT)(DA)(DG)(DG)(DG)(DT)(DT)(DA)(DG) (DG)(DG)(DT)(DT)(DA) (DG)(DG)(DG)(DT) (DT)(DA)(DG)(DG)(DG)(DT)(DT)(DA)(DG)(DG) (DG)(DT)(DT)(DA)(DG)(DG) (DG)(DT)(DT) (DA)(DG)(DG)(DG)(DT)(DT)(DA)(DG)(DG)(DG) (DT)(DT)(DA)(DG)(DG)(DG)(DT) (DT)(DA) (DG)(DG)(DG)(DT)(DT)(DA)(DG)(DG)(DG)(DT) (DT)(DA)(DG)(DG)(DG)(DT)(DT)(DA) (DG) (DG)(DG)(DT)(DT)(DA)(DG)(DG)(DG)(DT)(DT) (DA)(DG)(DG)(DG)(DT)(DT)(DA)(DG)(DG) (DG)(DT)(DT)(DA)(DG)(DG)(DG)(DT)(DT)(DA) (DG)(DG)(DG)(DT)(DT)(DA)(DG)(DG)(DG)(DT) (DT)(DA)(DG)(DG)(DG)(DT)(DT)(DA)(DG) (DG)(DG)(DT)(DT)(DA)(DG)(DG)(DG)(DT)(DT) (DA) (DG)(DG)(DG)(DT)(DT)(DA)(DG)(DG) (DG)(DT)(DT)(DA)(DG)(DG)(DG)(DT)(DT)(DA) (DG)(DG) (DG)(DT)(DT)(DA)(DG)(DG)(DG) (DT)(DT)(DA)(DG)(DG)(DG)(DT)(DT) |
-Macromolecule #2: DNA (275-mer)
Macromolecule | Name: DNA (275-mer) / type: dna / ID: 2 / Number of copies: 1 / Classification: DNA |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 82.365664 KDa |
Sequence | String: (DA)(DA)(DC)(DC)(DC)(DT)(DA)(DA)(DC)(DC) (DC)(DT)(DA)(DA)(DC)(DC)(DC)(DT)(DA)(DA) (DC)(DC)(DC)(DT)(DA)(DA)(DC)(DC)(DC) (DT)(DA)(DA)(DC)(DC)(DC)(DT)(DA)(DA)(DC) (DC) (DC)(DT)(DA)(DA)(DC)(DC) ...String: (DA)(DA)(DC)(DC)(DC)(DT)(DA)(DA)(DC)(DC) (DC)(DT)(DA)(DA)(DC)(DC)(DC)(DT)(DA)(DA) (DC)(DC)(DC)(DT)(DA)(DA)(DC)(DC)(DC) (DT)(DA)(DA)(DC)(DC)(DC)(DT)(DA)(DA)(DC) (DC) (DC)(DT)(DA)(DA)(DC)(DC)(DC)(DT) (DA)(DA)(DC)(DC)(DC)(DT)(DA)(DA)(DC)(DC) (DC)(DT) (DA)(DA)(DC)(DC)(DC)(DT)(DA) (DA)(DC)(DC)(DC)(DT)(DA)(DA)(DC)(DC)(DC) (DT)(DA)(DA) (DC)(DC)(DC)(DT)(DA)(DA) (DC)(DC)(DC)(DT)(DA)(DA)(DC)(DC)(DC)(DT) (DA)(DA)(DC)(DC) (DC)(DT)(DA)(DA)(DC) (DC)(DC)(DT)(DA)(DA)(DC)(DC)(DC)(DT)(DA) (DA)(DC)(DC)(DC)(DT) (DA)(DA)(DC)(DC) (DC)(DT)(DA)(DA)(DC)(DC)(DC)(DT)(DA)(DA) (DC)(DC)(DC)(DT)(DA)(DA) (DC)(DC)(DC) (DT)(DA)(DA)(DC)(DC)(DC)(DT)(DA)(DA)(DC) (DC)(DC)(DT)(DA)(DA)(DC)(DC) (DC)(DT) (DA)(DA)(DC)(DC)(DC)(DT)(DA)(DA)(DC)(DC) (DC)(DT)(DA)(DA)(DC)(DC)(DC)(DT) (DA) (DA)(DC)(DC)(DC)(DT)(DA)(DA)(DC)(DC)(DC) (DT)(DA)(DA)(DC)(DC)(DC)(DT)(DA)(DA) (DC)(DC)(DC)(DT)(DA)(DA)(DC)(DC)(DC)(DT) (DA)(DA)(DC)(DC)(DC)(DT)(DA)(DA)(DC)(DC) (DC)(DT)(DA)(DA)(DC)(DC)(DC)(DT)(DA) (DA)(DC)(DC)(DC)(DT)(DA)(DA)(DC)(DC)(DC) (DT) (DA)(DA)(DC)(DC)(DC)(DT)(DA)(DA) (DC)(DC)(DC)(DT)(DA)(DA)(DC)(DC)(DC)(DT) (DA)(DA) (DC)(DC)(DC)(DT)(DA)(DA)(DC) (DC)(DC)(DT)(DA)(DA)(DC)(DC)(DC) |
-Macromolecule #3: Histone H3.1
Macromolecule | Name: Histone H3.1 / type: protein_or_peptide / ID: 3 / Number of copies: 4 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 15.437167 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: MARTKQTARK STGGKAPRKQ LATKAARKSA PATGGVKKPH RYRPGTVALR EIRRYQKSTE LLIRKLPFQR LVREIAQDFK TDLRFQSSA VMALQEACEA YLVGLFEDTN LCAIHAKRVT IMPKDIQLAR RIRGERA UniProtKB: ![]() |
-Macromolecule #4: Histone H4
Macromolecule | Name: Histone H4 / type: protein_or_peptide / ID: 4 / Number of copies: 4 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 11.394426 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: MSGRGKGGKG LGKGGAKRHR KVLRDNIQGI TKPAIRRLAR RGGVKRISGL IYEETRGVLK VFLENVIRDA VTYTEHAKRK TVTAMDVVY ALKRQGRTLY GFGG UniProtKB: ![]() |
-Macromolecule #5: Histone H2A type 1-B/E
Macromolecule | Name: Histone H2A type 1-B/E / type: protein_or_peptide / ID: 5 / Number of copies: 4 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 14.165551 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: MSGRGKQGGK ARAKAKTRSS RAGLQFPVGR VHRLLRKGNY SERVGAGAPV YLAAVLEYLT AEILELAGNA ARDNKKTRII PRHLQLAIR NDEELNKLLG RVTIAQGGVL PNIQAVLLPK KTESHHKAKG K UniProtKB: Histone H2A type 1-B/E |
-Macromolecule #6: Histone H2B type 1-K
Macromolecule | Name: Histone H2B type 1-K / type: protein_or_peptide / ID: 6 / Number of copies: 4 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 11.151906 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: KKRKRSRKES YSVYVYKVLK QVHPDTGISS KAMGIMNSFV NDIFERIAGE ASRLAHYNKR STITSREIQT AVRLLLPGEL AKHAVSEGT KAVTKYTSAK UniProtKB: Histone H2B type 1-K |
-Experimental details
-Structure determination
Method | ![]() |
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Aggregation state | particle |
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Sample preparation
Concentration | 1 mg/mL |
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Buffer | pH: 6 |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: OTHER / Imaging mode: BRIGHT FIELD![]() |
Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 50.0 e/Å2 |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |