6BUZ

Cryo-EM structure of CENP-A nucleosome in complex with kinetochore protein CENP-N


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.92 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Structural mechanisms of centromeric nucleosome recognition by the kinetochore protein CENP-N.

Chittori, S.Hong, J.Saunders, H.Feng, H.Ghirlando, R.Kelly, A.E.Bai, Y.Subramaniam, S.

(2018) Science 359: 339-343

  • DOI: https://doi.org/10.1126/science.aar2781
  • Primary Citation of Related Structures:  
    6BUZ

  • PubMed Abstract: 

    Accurate chromosome segregation requires the proper assembly of kinetochore proteins. A key step in this process is the recognition of the histone H3 variant CENP-A in the centromeric nucleosome by the kinetochore protein CENP-N. We report cryo-electron microscopy (cryo-EM), biophysical, biochemical, and cell biological studies of the interaction between the CENP-A nucleosome and CENP-N. We show that human CENP-N confers binding specificity through interactions with the L1 loop of CENP-A, stabilized by electrostatic interactions with the nucleosomal DNA. Mutational analyses demonstrate analogous interactions in Xenopus , which are further supported by residue-swapping experiments involving the L1 loop of CENP-A. Our results are consistent with the coevolution of CENP-N and CENP-A and establish the structural basis for recognition of the CENP-A nucleosome to enable kinetochore assembly and centromeric chromatin organization.


  • Organizational Affiliation

    Laboratory of Cell Biology, Center for Cancer Research (CCR), National Cancer Institute (NCI), National Institutes of Health (NIH), Bethesda, MD 20892, USA.


Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H3-like centromeric protein A
A, E
160Homo sapiensMutation(s): 0 
Gene Names: CENPA
UniProt & NIH Common Fund Data Resources
Find proteins for P49450 (Homo sapiens)
Explore P49450 
Go to UniProtKB:  P49450
PHAROS:  P49450
GTEx:  ENSG00000115163 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP49450
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H4
B, F
103Homo 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
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP62805
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H2A
C, G
130Homo 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
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04908
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H2B
D, H
126Homo sapiensMutation(s): 0 
Gene Names: HIST1H2BJH2BFR
UniProt & NIH Common Fund Data Resources
Find proteins for P06899 (Homo sapiens)
Explore P06899 
Go to UniProtKB:  P06899
PHAROS:  P06899
GTEx:  ENSG00000124635 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP06899
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
Maltose-binding periplasmic protein, Centromere protein N chimeraK [auth N]668Escherichia coliHomo sapiens
This entity is chimeric
Mutation(s): 5 
Gene Names: malEZ5632ECs5017CENPNC16orf60ICEN32BM-309
UniProt & NIH Common Fund Data Resources
Find proteins for P0AEX9 (Escherichia coli (strain K12))
Explore P0AEX9 
Go to UniProtKB:  P0AEX9
Find proteins for Q96H22 (Homo sapiens)
Explore Q96H22 
Go to UniProtKB:  Q96H22
PHAROS:  Q96H22
GTEx:  ENSG00000166451 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsQ96H22P0AEX9
Sequence Annotations
Expand
  • Reference Sequence
Find similar nucleic acids by:  (by identity cutoff)  |  3D Structure
Entity ID: 5
MoleculeChains LengthOrganismImage
DNA (147-MER)147synthetic construct
Sequence Annotations
Expand
  • Reference Sequence
Find similar nucleic acids by:  (by identity cutoff)  |  3D Structure
Entity ID: 6
MoleculeChains LengthOrganismImage
DNA (147-MER)147synthetic construct
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.92 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION2.0
MODEL REFINEMENTPHENIX

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)United Statesintramural program
National Institutes of Health/National Cancer Institute (NIH/NCI)United Statesintramural program

Revision History  (Full details and data files)

  • Version 1.0: 2017-12-20
    Type: Initial release
  • Version 1.1: 2018-01-10
    Changes: Database references
  • Version 1.2: 2018-01-31
    Changes: Database references
  • Version 1.3: 2019-11-27
    Changes: Author supporting evidence
  • Version 1.4: 2024-03-13
    Changes: Data collection, Database references