7XHN

Structure of human inner kinetochore CCAN-DNA complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.71 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

Structural insights into human CCAN complex assembled onto DNA.

Tian, T.Chen, L.Dou, Z.Yang, Z.Gao, X.Yuan, X.Wang, C.Liu, R.Shen, Z.Gui, P.Teng, M.Meng, X.Hill, D.L.Li, L.Zhang, X.Liu, X.Sun, L.Zang, J.Yao, X.

(2022) Cell Discov 8: 90-90

  • DOI: https://doi.org/10.1038/s41421-022-00439-6
  • Primary Citation of Related Structures:  
    7XHN, 7XHO

  • PubMed Abstract: 

    In mitosis, accurate chromosome segregation depends on kinetochores that connect centromeric chromatin to spindle microtubules. The centromeres of budding yeast, which are relatively simple, are connected to individual microtubules via a kinetochore constitutive centromere associated network (CCAN). However, the complex centromeres of human chromosomes comprise millions of DNA base pairs and attach to multiple microtubules. Here, by use of cryo-electron microscopy and functional analyses, we reveal the molecular basis of how human CCAN interacts with duplex DNA and facilitates accurate chromosome segregation. The overall structure relates to the cooperative interactions and interdependency of the constituent sub-complexes of the CCAN. The duplex DNA is topologically entrapped by human CCAN. Further, CENP-N does not bind to the RG-loop of CENP-A but to DNA in the CCAN complex. The DNA binding activity is essential for CENP-LN localization to centromere and chromosome segregation during mitosis. Thus, these analyses provide new insights into mechanisms of action underlying kinetochore assembly and function in mitosis.


  • Organizational Affiliation

    MOE Key Laboratory for Cellular Dynamics, the First Affiliated Hospital, CAS Center for Excellence in Biomacromolecules, and School of Life Sciences, University of Science and Technology of China, Hefei, China.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Centromere protein OA [auth o],
H [auth O]
300Homo sapiensMutation(s): 0 
Gene Names: CENPO
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PHAROS:  Q9BU64
GTEx:  ENSG00000138092 
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UniProt GroupQ9BU64
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Centromere protein HB [auth H]253Homo sapiensMutation(s): 0 
Gene Names: CENPH
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PHAROS:  Q9H3R5
GTEx:  ENSG00000153044 
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UniProt GroupQ9H3R5
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Centromere protein IC [auth I]756Homo sapiensMutation(s): 0 
Gene Names: CENPI
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Find proteins for Q92674 (Homo sapiens)
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PHAROS:  Q92674
GTEx:  ENSG00000102384 
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UniProt GroupQ92674
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Centromere protein KD [auth K]269Homo sapiensMutation(s): 0 
Gene Names: CENPK
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PHAROS:  Q9BS16
GTEx:  ENSG00000123219 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Centromere protein LE [auth L]344Homo sapiensMutation(s): 0 
Gene Names: CENPL
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GTEx:  ENSG00000120334 
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
Centromere protein MF [auth M]180Homo sapiensMutation(s): 0 
Gene Names: CENPM
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PHAROS:  Q9NSP4
GTEx:  ENSG00000100162 
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
Centromere protein NG [auth N]345Homo sapiensMutation(s): 0 
Gene Names: CENPN
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PHAROS:  Q96H22
GTEx:  ENSG00000166451 
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
Centromere protein PI [auth P]288Homo sapiensMutation(s): 0 
Gene Names: CENPP
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GTEx:  ENSG00000188312 
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
Centromere protein SJ [auth S]138Homo sapiensMutation(s): 0 
Gene Names: CENPS
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GTEx:  ENSG00000175279 
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Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
Centromere protein TK [auth T]561Homo sapiensMutation(s): 0 
Gene Names: CENPT
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GTEx:  ENSG00000102901 
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Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
CENP-WL [auth W]88Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000203760 
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Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
Centromere protein XM [auth X]81Homo sapiensMutation(s): 0 
Gene Names: CENPX
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GTEx:  ENSG00000169689 
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Entity ID: 15
MoleculeChains Sequence LengthOrganismDetailsImage
Centromere protein CP [auth C],
Q [auth c]
943Homo sapiensMutation(s): 0 
Gene Names: CENPC
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GTEx:  ENSG00000145241 
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Entity ID: 16
MoleculeChains Sequence LengthOrganismDetailsImage
Centromere protein QR [auth Q]274Homo sapiensMutation(s): 0 
Gene Names: CENPQ
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Find proteins for Q7L2Z9 (Homo sapiens)
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PHAROS:  Q7L2Z9
GTEx:  ENSG00000031691 
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Entity ID: 17
MoleculeChains Sequence LengthOrganismDetailsImage
Centromere protein US [auth U]418Homo sapiensMutation(s): 0 
Gene Names: CENPU
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GTEx:  ENSG00000151725 
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Entity ID: 18
MoleculeChains Sequence LengthOrganismDetailsImage
Centromere protein RT [auth R]177Homo sapiensMutation(s): 0 
Gene Names: CENPR
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Find proteins for Q13352 (Homo sapiens)
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GTEx:  ENSG00000142856 
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Entity ID: 13
MoleculeChains LengthOrganismImage
DNA (25-MER)N [auth G]25Homo sapiens
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Entity ID: 14
MoleculeChains LengthOrganismImage
DNA (25-MER)O [auth J]25Homo sapiens
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.71 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China--

Revision History  (Full details and data files)

  • Version 1.0: 2023-01-25
    Type: Initial release
  • Version 1.1: 2024-07-03
    Changes: Data collection