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


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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: 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) ...

    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

    Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, Hefei, China. yaoxb@ustc.edu.cn.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Centromere protein OH [auth O],
A [auth o]
300Homo sapiensMutation(s): 0 
Gene Names: CENPOICEN36MCM21R
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UniProt GroupQ9BU64
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Centromere protein HB [auth H]253Homo sapiensMutation(s): 0 
Gene Names: CENPHICEN35
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UniProt GroupQ9H3R5
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Centromere protein IC [auth I]756Homo sapiensMutation(s): 0 
Gene Names: CENPIFSHPRH1ICEN19LRPR1
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Centromere protein KD [auth K]269Homo sapiensMutation(s): 0 
Gene Names: CENPKICEN37FKSG14
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Centromere protein LE [auth L]344Homo sapiensMutation(s): 0 
Gene Names: CENPLC1orf155ICEN33
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
Centromere protein MF [auth M]180Homo sapiensMutation(s): 0 
Gene Names: CENPMC22orf18ICEN39PANE1
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
Centromere protein NG [auth N]345Homo sapiensMutation(s): 0 
Gene Names: CENPNC16orf60ICEN32BM-309
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
Centromere protein PI [auth P]288Homo sapiensMutation(s): 0 
Gene Names: CENPP
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Entity ID: 9
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Centromere protein SJ [auth S]138Homo sapiensMutation(s): 0 
Gene Names: CENPSAPITD1FAAP16MHF1
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Entity ID: 10
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Centromere protein TK [auth T]561Homo sapiensMutation(s): 0 
Gene Names: CENPTC16orf56ICEN22
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Entity ID: 11
MoleculeChainsSequence LengthOrganismDetailsImage
CENP-WL [auth W]88Homo sapiensMutation(s): 0 
Gene Names: CENPWC6orf173CUG2
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Entity ID: 12
MoleculeChainsSequence LengthOrganismDetailsImage
Centromere protein XM [auth X]81Homo sapiensMutation(s): 0 
Gene Names: CENPXFAAP10MHF2STRA13
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Entity ID: 15
MoleculeChainsSequence LengthOrganismDetailsImage
Centromere protein CP [auth C],
Q [auth c]
943Homo sapiensMutation(s): 0 
Gene Names: CENPCCENPC1ICEN7
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Entity ID: 16
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Centromere protein QR [auth Q]274Homo sapiensMutation(s): 0 
Gene Names: CENPQC6orf139
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Entity ID: 17
MoleculeChainsSequence LengthOrganismDetailsImage
Centromere protein US [auth U]418Homo sapiensMutation(s): 0 
Gene Names: CENPUICEN24KLIP1MLF1IPPBIP1
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Entity ID: 18
MoleculeChainsSequence LengthOrganismDetailsImage
Centromere protein RT [auth R]177Homo sapiensMutation(s): 0 
Gene Names: CENPRITGB3BPNRIF3
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Entity ID: 13
MoleculeChainsLengthOrganismImage
DNA (25-MER)N [auth G]25Homo sapiens
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Entity ID: 14
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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