7PII

Structure of the human CCAN CENP-A alpha-satellite complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.68 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of the human inner kinetochore bound to a centromeric CENP-A nucleosome.

Yatskevich, S.Muir, K.W.Bellini, D.Zhang, Z.Yang, J.Tischer, T.Predin, M.Dendooven, T.McLaughlin, S.H.Barford, D.

(2022) Science 376: 844-852

  • DOI: https://doi.org/10.1126/science.abn3810
  • Primary Citation of Related Structures:  
    7PB4, 7PB8, 7PII, 7PKN, 7R5R, 7R5S, 7R5V, 7YWX, 7YYH

  • PubMed Abstract: 

    Kinetochores assemble onto specialized centromeric CENP-A (centromere protein A) nucleosomes (CENP-A Nuc ) to mediate attachments between chromosomes and the mitotic spindle. We describe cryo-electron microscopy structures of the human inner kinetochore constitutive centromere associated network (CCAN) complex bound to CENP-A Nuc reconstituted onto α-satellite DNA. CCAN forms edge-on contacts with CENP-A Nuc , and a linker DNA segment of the α-satellite repeat emerges from the fully wrapped end of the nucleosome to thread through the central CENP-LN channel that tightly grips the DNA. The CENP-TWSX histone-fold module further augments DNA binding and partially wraps the linker DNA in a manner reminiscent of canonical nucleosomes. Our study suggests that the topological entrapment of the linker DNA by CCAN provides a robust mechanism by which kinetochores withstand both pushing and pulling forces exerted by the mitotic spindle.


  • Organizational Affiliation

    MRC Laboratory of Molecular Biology, Cambridge CB2 0QH, UK.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H3-like centromeric protein A
A, E
140Homo sapiensMutation(s): 0 
Gene Names: CENPA
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Find proteins for P49450 (Homo sapiens)
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PHAROS:  P49450
GTEx:  ENSG00000115163 
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UniProt GroupP49450
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H4
B, F
103Homo sapiensMutation(s): 0 
Gene Names: 
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Find proteins for P62805 (Homo sapiens)
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PHAROS:  P62805
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UniProt GroupP62805
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H2A type 1-C
C, G
153Homo sapiensMutation(s): 0 
Gene Names: H2AC6H2AFLHIST1H2AC
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Find proteins for Q93077 (Homo sapiens)
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PHAROS:  Q93077
GTEx:  ENSG00000180573 
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UniProt GroupQ93077
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H2B type 1-C/E/F/G/I
D, H
126Homo sapiensMutation(s): 0 
Gene Names: HIST1H2BCH2BFLHIST1H2BEH2BFHHIST1H2BFH2BFGHIST1H2BGH2BFAHIST1H2BIH2BFK
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Find proteins for P62807 (Homo sapiens)
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
Centromere protein C
K, L
545Homo sapiensMutation(s): 0 
Gene Names: CENPCCENPC1ICEN7
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Find proteins for Q03188 (Homo sapiens)
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PHAROS:  Q03188
GTEx:  ENSG00000145241 
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Entity ID: 5
MoleculeChains LengthOrganismImage
DNA (122-MER)171Homo sapiens
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Entity ID: 6
MoleculeChains LengthOrganismImage
DNA (123-MER)171Homo sapiens
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.68 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Cancer Research UKGermany--
Medical Research Council (MRC, United Kingdom)Germany--
Boehringer Ingelheim Fonds (BIF)Germany--

Revision History  (Full details and data files)

  • Version 1.0: 2022-05-25
    Type: Initial release
  • Version 1.1: 2022-06-01
    Changes: Database references
  • Version 1.2: 2024-07-17
    Changes: Data collection