3C9K

Model of Histone Octamer Tubular Crystals


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 20.0 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Histone octamer helical tubes suggest that an internucleosomal four-helix bundle stabilizes the chromatin fiber

Frouws, T.D.Patterton, H.G.Sewell, B.T.

(2009) Biophys J 96: 3363-3371

  • DOI: 10.1016/j.bpj.2008.10.075
  • Primary Citation of Related Structures:  
    3C9K

  • PubMed Abstract: 
  • A major question in chromatin involves the exact organization of nucleosomes within the 30-nm chromatin fiber and its structural determinants of assembly. Here we investigate the structure of histone octamer helical tubes via the method of iterative helical real-space reconstruction ...

    A major question in chromatin involves the exact organization of nucleosomes within the 30-nm chromatin fiber and its structural determinants of assembly. Here we investigate the structure of histone octamer helical tubes via the method of iterative helical real-space reconstruction. Accurate placement of the x-ray structure of the histone octamer within the reconstructed density yields a pseudoatomic model for the entire helix, and allows precise identification of molecular interactions between neighboring octamers. One such interaction that would not be obscured by DNA in the nucleosome consists of a twofold symmetric four-helix bundle formed between pairs of H2B-alpha3 and H2B-alphaC helices of neighboring octamers. We believe that this interface can act as an internucleosomal four-helix bundle within the context of the chromatin fiber. The potential relevance of this interface in the folding of the 30-nm chromatin fiber is discussed.


    Organizational Affiliation

    Department of Biotechnology, University of the Western Cape, Cape Town, South Africa.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H2A-IV AE128Gallus gallusMutation(s): 0 
Find proteins for P02263 (Gallus gallus)
Explore P02263 
Go to UniProtKB:  P02263
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H2B 7 BF125Gallus gallusMutation(s): 0 
Gene Names: H2B-VII
Find proteins for P0C1H5 (Gallus gallus)
Explore P0C1H5 
Go to UniProtKB:  P0C1H5
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H3.2 CG135Gallus gallusMutation(s): 0 
Gene Names: H3-IH3-IIH3-IIIH3-IVH3-VH3-VIH3-VIIH3-VIII
Find proteins for P84229 (Gallus gallus)
Explore P84229 
Go to UniProtKB:  P84229
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H4 DH102Gallus gallusMutation(s): 0 
Gene Names: H4-IH4-IIH4-IIIH4-IVH4-VH4-VIH4-VII
Find proteins for P62801 (Gallus gallus)
Explore P62801 
Go to UniProtKB:  P62801
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 20.0 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2008-02-16 
  • Released Date: 2009-01-06 
  • Deposition Author(s): Frouws, T.D.

Revision History  (Full details and data files)

  • Version 1.0: 2009-01-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2012-09-05
    Changes: Database references
  • Version 1.3: 2019-12-11
    Changes: Author supporting evidence, Data collection, Database references