3C9K

Model of Histone Octamer Tubular Crystals


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 20 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation 3D Report Full Report


This is version 1.2 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

  • 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 ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Histone H2A-IV
A, E
128Gallus gallusN/A
Find proteins for P02263 (Gallus gallus)
Go to UniProtKB:  P02263
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Histone H2B 7
B, F
125Gallus gallusGene Names: H2B-VII
Find proteins for P0C1H5 (Gallus gallus)
Go to UniProtKB:  P0C1H5
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Histone H3.2
C, G
135Gallus gallusGene Names: H3-I, H3-II, H3-III, H3-IV, H3-V, H3-VI, H3-VII, H3-VIII
Find proteins for P84229 (Gallus gallus)
Go to UniProtKB:  P84229
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Histone H4
D, H
102Gallus gallusGene Names: H4-I, H4-II, H4-III, H4-IV, H4-V, H4-VI, H4-VII
Find proteins for P62801 (Gallus gallus)
Go to UniProtKB:  P62801
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 20 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

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

Revision History 

  • Version 1.0: 2009-01-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2012-09-05
    Type: Database references