6L49

H3-CA-H3 tri-nucleosome with the 22 base-pair linker DNA


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 18.9 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Cryo-EM Structures of Centromeric Tri-nucleosomes Containing a Central CENP-A Nucleosome.

Takizawa, Y.Ho, C.H.Tachiwana, H.Matsunami, H.Kobayashi, W.Suzuki, M.Arimura, Y.Hori, T.Fukagawa, T.Ohi, M.D.Wolf, M.Kurumizaka, H.

(2020) Structure 28: 44

  • DOI: https://doi.org/10.1016/j.str.2019.10.016
  • Primary Citation of Related Structures:  
    6L49, 6L4A

  • PubMed Abstract: 

    The histone H3 variant CENP-A is a crucial epigenetic marker for centromere specification. CENP-A forms a characteristic nucleosome and dictates the higher-order configuration of centromeric chromatin. However, little is known about how the CENP-A nucleosome affects the architecture of centromeric chromatin. In this study, we reconstituted tri-nucleosomes mimicking a centromeric nucleosome arrangement containing the CENP-A nucleosome, and determined their 3D structures by cryoelectron microscopy. The H3-CENP-A-H3 tri-nucleosomes adopt an untwisted architecture, with an outward-facing linker DNA path between nucleosomes. This is distinct from the H3-H3-H3 tri-nucleosome architecture, with an inward-facing DNA path. Intriguingly, the untwisted architecture may allow the CENP-A nucleosome to be exposed to the solvent in the condensed chromatin model. These results provide a structural basis for understanding the 3D configuration of CENP-A-containing chromatin, and may explain how centromeric proteins can specifically target the CENP-A nucleosomes buried in robust amounts of H3 nucleosomes in centromeres.


  • Organizational Affiliation

    Laboratory of Chromatin Structure and Function, Institute for Quantitative Biosciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan; Molecular Cryo-Electron Microscopy Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa 904-0495, Japan.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H3-like centromeric protein A
A, E
143Homo sapiensMutation(s): 0 
Gene Names: CENPA
UniProt & NIH Common Fund Data Resources
Find proteins for P49450 (Homo sapiens)
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Go to UniProtKB:  P49450
PHAROS:  P49450
GTEx:  ENSG00000115163 
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UniProt GroupP49450
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H4
B, F, L, P, T
B, F, L, P, T, X
106Homo sapiensMutation(s): 0 
Gene Names: 
UniProt & NIH Common Fund Data Resources
Find proteins for P62805 (Homo sapiens)
Explore P62805 
Go to UniProtKB:  P62805
PHAROS:  P62805
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UniProt GroupP62805
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H2A type 1-B/E
C, G, M, Q, U
C, G, M, Q, U, Y
133Homo sapiensMutation(s): 0 
Gene Names: HIST1H2ABH2AFMHIST1H2AEH2AFA
UniProt & NIH Common Fund Data Resources
Find proteins for P04908 (Homo sapiens)
Explore P04908 
Go to UniProtKB:  P04908
PHAROS:  P04908
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UniProt GroupP04908
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H2B type 1-J
D, H, N, R, V
D, H, N, R, V, Z
129Homo sapiensMutation(s): 0 
Gene Names: HIST1H2BJH2BFR
UniProt & NIH Common Fund Data Resources
Find proteins for P06899 (Homo sapiens)
Explore P06899 
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PHAROS:  P06899
GTEx:  ENSG00000124635 
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UniProt GroupP06899
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H3.1
K, O, S, W
139Homo sapiensMutation(s): 0 
Gene Names: 
UniProt & NIH Common Fund Data Resources
Find proteins for P68431 (Homo sapiens)
Explore P68431 
Go to UniProtKB:  P68431
PHAROS:  P68431
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UniProt GroupP68431
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Entity ID: 5
MoleculeChains LengthOrganismImage
DNA (485-MER)485synthetic construct
Sequence Annotations
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Entity ID: 6
MoleculeChains LengthOrganismImage
DNA (485-MER)485synthetic construct
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 18.9 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION2.1

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Japan Society for the Promotion of ScienceJapanJP18H05534
Japan Society for the Promotion of ScienceJapanJP17H01408
Japan Society for the Promotion of ScienceJapanJP17H05013
Japan Society for the Promotion of ScienceJapan17H06167
Japan Society for the Promotion of ScienceJapan15H05972
Japan Society for the Promotion of ScienceJapanJP19K06522

Revision History  (Full details and data files)

  • Version 1.0: 2019-12-04
    Type: Initial release
  • Version 1.1: 2020-01-22
    Changes: Database references