RCSB PDB - 9GXA: CENP-A/H4 di-tetrasome assembled on alpha-satellite DNA.

 9GXA

CENP-A/H4 di-tetrasome assembled on alpha-satellite DNA.


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.01 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Non-nucleosomal (CENP-A/H4) 2 - DNA complexes as a possible platform for centromere organization.

Ali-Ahmad, A.Mors, M.Carrer, M.Li, X.Bilokapic, S.Halic, M.Cascella, M.Sekulic, N.

(2025) bioRxiv 

  • DOI: https://doi.org/10.1101/2024.12.31.630874
  • Primary Citation of Related Structures:  
    9GXA

  • PubMed Abstract: 

    The centromere is a part of the chromosome that is essential for the even segregation of duplicated chromosomes during cell division. It is epigenetically defined by the presence of the histone H3 variant CENP-A. CENP-A associates specifically with a group of 16 proteins that form the centromere-associated network of proteins (CCAN). In mitosis, the kinetochore forms on the CCAN to connect the duplicated chromosomes to the microtubules protruding from the cell poles. Previous studies have shown that CENP-A replaces H3 in nucleosomes, and recently the structures of CENP-A-containing nucleosomes in complex with CCANs have been revealed, but they show only a limited interaction between CCANs and CENP-A. Here, we report the cryoEM structure of 2x(CENP-A/H4) 2 -di-tetramers assembled on DNA in the absence of H2A/H2B histone dimer and speculate how (CENP-A/H4) 2 -tetramers and -di-tetramers might serve as a platform for CCAN organization.


  • Organizational Affiliation

    Centre for Molecular Medicine Norway (NCMM), Nordic EMBL Partnership, Faculty of Medicine, University of Oslo, Oslo 0318, Norway.


Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H3-like centromeric protein A
A, C, E, G
139Homo 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
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H4
B, D, F, H
102Homo 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
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.01 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Research Council of NorwayNorway87615
Research Council of NorwayNorway325528

Revision History  (Full details and data files)

  • Version 1.0: 2025-01-29
    Type: Initial release