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- EMDB-30591: Cryo-EM structure of the nucleosome containing Giardia histones -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-30591 | |||||||||
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Title | Cryo-EM structure of the nucleosome containing Giardia histones | |||||||||
![]() | Nucleosome containing G. lamblia histones | |||||||||
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Function / homology | ![]() ![]() ![]() ![]() Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() | |||||||||
Method | ![]() ![]() | |||||||||
![]() | Sato S / Takizawa Y | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Cryo-EM structure of the nucleosome core particle containing Giardia lamblia histones. Authors: Shoko Sato / Yoshimasa Takizawa / Fumika Hoshikawa / Mariko Dacher / Hiroki Tanaka / Hiroaki Tachiwana / Tomoya Kujirai / Yukari Iikura / Cheng-Han Ho / Naruhiko Adachi / Indu Patwal / ...Authors: Shoko Sato / Yoshimasa Takizawa / Fumika Hoshikawa / Mariko Dacher / Hiroki Tanaka / Hiroaki Tachiwana / Tomoya Kujirai / Yukari Iikura / Cheng-Han Ho / Naruhiko Adachi / Indu Patwal / Andrew Flaus / Hitoshi Kurumizaka / ![]() ![]() Abstract: Giardia lamblia is a pathogenic unicellular eukaryotic parasite that causes giardiasis. Its genome encodes the canonical histones H2A, H2B, H3, and H4, which share low amino acid sequence identity ...Giardia lamblia is a pathogenic unicellular eukaryotic parasite that causes giardiasis. Its genome encodes the canonical histones H2A, H2B, H3, and H4, which share low amino acid sequence identity with their human orthologues. We determined the structure of the G. lamblia nucleosome core particle (NCP) at 3.6 Å resolution by cryo-electron microscopy. G. lamblia histones form a characteristic NCP, in which the visible 125 base-pair region of the DNA is wrapped in a left-handed supercoil. The acidic patch on the G. lamblia octamer is deeper, due to an insertion extending the H2B α1 helix and L1 loop, and thus cannot bind the LANA acidic patch binding peptide. The DNA and histone regions near the DNA entry-exit sites could not be assigned, suggesting that these regions are asymmetrically flexible in the G. lamblia NCP. Characterization by thermal unfolding in solution revealed that both the H2A-H2B and DNA association with the G. lamblia H3-H4 were weaker than those for human H3-H4. These results demonstrate the uniformity of the histone octamer as the organizing platform for eukaryotic chromatin, but also illustrate the unrecognized capability for large scale sequence variations that enable the adaptability of histone octamer surfaces and confer internal stability. | |||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 1.3 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 15.5 KB 15.5 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 5.8 KB | Display | ![]() |
Images | ![]() | 181.9 KB | ||
Filedesc metadata | ![]() | 5.5 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7d69MC M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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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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Annotation | Nucleosome containing G. lamblia histones | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.05 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : Nucleosome
Entire | Name: Nucleosome![]() |
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Components |
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-Supramolecule #1: Nucleosome
Supramolecule | Name: Nucleosome / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() ![]() ![]() |
-Macromolecule #1: Histone H3
Macromolecule | Name: Histone H3 / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() ![]() |
Molecular weight | Theoretical: 16.639574 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: GSHMARTKHT ARKTTSATKA PRKTIARKAA RKTASSTSGI KKTGRKKQGM VAVKEIKKYQ KSTDLLIRKL PFSKLVRDIV TSGLSKSDI RFQGAAVEAL QESAENYIIS LFVDTQLCAE HAKRVTIMKP DMELATRIGK RIEPEYRKGK UniProtKB: ![]() |
-Macromolecule #2: Histone H4
Macromolecule | Name: Histone H4 / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() ![]() |
Molecular weight | Theoretical: 11.407195 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: GSHMSGKGKG KGYGKSKRHS KEKDTLGGIT KPAIRRLARR GGVKRISSTI YQQTREVLKA FLEVVLRDSL TYTEHGQRKT VTSQDVVYA LKRQGRTLYG FGI UniProtKB: ![]() |
-Macromolecule #3: Histone H2B
Macromolecule | Name: Histone H2B / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() ![]() |
Molecular weight | Theoretical: 14.903089 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: GSHMSKVETK RLMKKTEAGD KGDAKRKHKR HETYATYIYK VLRSENIRSE ADTDLGISNK GMEVMNSLVN DLFERIASEA SNLAKISKR NTIGKKDIES AAKLVIPGEI GRLIRDEADK ALSKFTSSKE STKK UniProtKB: ![]() |
-Macromolecule #4: Histone H2A
Macromolecule | Name: Histone H2A / type: protein_or_peptide / ID: 4 / Number of copies: 2 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() ![]() |
Molecular weight | Theoretical: 14.188249 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: GSHMSTKPVK DNSKMKSRSA RAGISFPIGR IHRHLREGRY AERISSDAPV YLAAVLENVV AEVFREACNH RDKKSQKRIV PNHILTALR KDKELATIFA NVTIREGGVA RSAKEGREGK GSHRSQDL UniProtKB: ![]() |
-Macromolecule #5: 601L DNA (145-MER)
Macromolecule | Name: 601L DNA (145-MER) / type: dna / ID: 5 / Number of copies: 1 / Classification: DNA |
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Source (natural) | Organism: synthetic construct (others) |
Molecular weight | Theoretical: 44.761523 KDa |
Sequence | String: (DA)(DT)(DC)(DA)(DC)(DA)(DA)(DT)(DC)(DC) (DC)(DG)(DG)(DT)(DG)(DC)(DC)(DG)(DA)(DG) (DG)(DC)(DC)(DG)(DC)(DT)(DC)(DA)(DA) (DT)(DT)(DG)(DG)(DT)(DC)(DG)(DT)(DA)(DG) (DA) (DC)(DA)(DG)(DC)(DT)(DC) ...String: (DA)(DT)(DC)(DA)(DC)(DA)(DA)(DT)(DC)(DC) (DC)(DG)(DG)(DT)(DG)(DC)(DC)(DG)(DA)(DG) (DG)(DC)(DC)(DG)(DC)(DT)(DC)(DA)(DA) (DT)(DT)(DG)(DG)(DT)(DC)(DG)(DT)(DA)(DG) (DA) (DC)(DA)(DG)(DC)(DT)(DC)(DT)(DA) (DG)(DC)(DA)(DC)(DC)(DG)(DC)(DT)(DT)(DA) (DA)(DA) (DC)(DG)(DC)(DA)(DC)(DG)(DT) (DA)(DC)(DG)(DG)(DA)(DA)(DT)(DC)(DC)(DG) (DT)(DA)(DC) (DG)(DT)(DG)(DC)(DG)(DT) (DT)(DT)(DA)(DA)(DG)(DC)(DG)(DG)(DT)(DG) (DC)(DT)(DA)(DG) (DA)(DG)(DC)(DT)(DG) (DT)(DC)(DT)(DA)(DC)(DG)(DA)(DC)(DC)(DA) (DA)(DT)(DT)(DG)(DA) (DG)(DC)(DG)(DG) (DC)(DC)(DT)(DC)(DG)(DG)(DC)(DA)(DC)(DC) (DG)(DG)(DG)(DA)(DT)(DT) (DG)(DT)(DG) (DA)(DT) |
-Macromolecule #6: 601L DNA (145-MER)
Macromolecule | Name: 601L DNA (145-MER) / type: dna / ID: 6 / Number of copies: 1 / Classification: DNA |
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Source (natural) | Organism: synthetic construct (others) |
Molecular weight | Theoretical: 44.752508 KDa |
Sequence | String: (DA)(DT)(DC)(DA)(DC)(DA)(DA)(DT)(DC)(DC) (DC)(DG)(DG)(DT)(DG)(DC)(DC)(DG)(DA)(DG) (DG)(DC)(DC)(DG)(DC)(DT)(DC)(DA)(DA) (DT)(DT)(DG)(DG)(DT)(DC)(DG)(DT)(DA)(DG) (DA) (DC)(DA)(DG)(DC)(DT)(DC) ...String: (DA)(DT)(DC)(DA)(DC)(DA)(DA)(DT)(DC)(DC) (DC)(DG)(DG)(DT)(DG)(DC)(DC)(DG)(DA)(DG) (DG)(DC)(DC)(DG)(DC)(DT)(DC)(DA)(DA) (DT)(DT)(DG)(DG)(DT)(DC)(DG)(DT)(DA)(DG) (DA) (DC)(DA)(DG)(DC)(DT)(DC)(DT)(DA) (DG)(DC)(DA)(DC)(DC)(DG)(DC)(DT)(DT)(DA) (DA)(DA) (DC)(DG)(DC)(DA)(DC)(DG)(DT) (DA)(DC)(DG)(DG)(DA)(DT)(DT)(DC)(DC)(DG) (DT)(DA)(DC) (DG)(DT)(DG)(DC)(DG)(DT) (DT)(DT)(DA)(DA)(DG)(DC)(DG)(DG)(DT)(DG) (DC)(DT)(DA)(DG) (DA)(DG)(DC)(DT)(DG) (DT)(DC)(DT)(DA)(DC)(DG)(DA)(DC)(DC)(DA) (DA)(DT)(DT)(DG)(DA) (DG)(DC)(DG)(DG) (DC)(DC)(DT)(DC)(DG)(DG)(DC)(DA)(DC)(DC) (DG)(DG)(DG)(DA)(DT)(DT) (DG)(DT)(DG) (DA)(DT) |
-Experimental details
-Structure determination
Method | ![]() |
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Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.5 |
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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: FLOOD BEAM / Imaging mode: BRIGHT FIELD![]() |
Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 64.0 e/Å2 |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
Refinement | Space: REAL / Protocol: FLEXIBLE FIT |
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Output model | ![]() PDB-7d69: |