1F66

2.6 A CRYSTAL STRUCTURE OF A NUCLEOSOME CORE PARTICLE CONTAINING THE VARIANT HISTONE H2A.Z


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.193 

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Literature

Crystal structure of a nucleosome core particle containing the variant histone H2A.Z.

Suto, R.K.Clarkson, M.J.Tremethick, D.J.Luger, K.

(2000) Nat Struct Biol 7: 1121-1124

  • DOI: 10.1038/81971
  • Primary Citation of Related Structures:  
    1F66

  • PubMed Abstract: 
  • Activation of transcription within chromatin has been correlated with the incorporation of the essential histone variant H2A.Z into nucleosomes. H2A.Z and other histone variants may establish structurally distinct chromosomal domains; however, the molecular mechanism by which they function is largely unknown ...

    Activation of transcription within chromatin has been correlated with the incorporation of the essential histone variant H2A.Z into nucleosomes. H2A.Z and other histone variants may establish structurally distinct chromosomal domains; however, the molecular mechanism by which they function is largely unknown. Here we report the 2.6 A crystal structure of a nucleosome core particle containing the histone variant H2A.Z. The overall structure is similar to that of the previously reported 2.8 A nucleosome structure containing major histone proteins. However, distinct localized changes result in the subtle destabilization of the interaction between the (H2A.Z-H2B) dimer and the (H3-H4)(2) tetramer. Moreover, H2A.Z nucleosomes have an altered surface that includes a metal ion. This altered surface may lead to changes in higher order structure, and/or could result in the association of specific nuclear proteins with H2A.Z. Finally, incorporation of H2A.Z and H2A within the same nucleosome is unlikely, due to significant changes in the interface between the two H2A.Z-H2B dimers.


    Organizational Affiliation

    Department of Biochemistry Molecular Biology, Colorado State University, Fort Collins, Colorado 80523-1870 USA.



Macromolecules

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
HISTONE H3C [auth A], G [auth E]136Xenopus laevisMutation(s): 0 
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Find proteins for P84233 (Xenopus laevis)
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
HISTONE H4D [auth B], H [auth F]103Mus musculusMutation(s): 0 
Gene Names: 
UniProt & NIH Common Fund Data Resources
Find proteins for P62806 (Mus musculus)
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IMPC:  MGI:2448443
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
HISTONE H2A.ZE [auth C], I [auth G]128Homo sapiensMutation(s): 0 
Gene Names: H2AZ1H2AFZH2AZ
UniProt & NIH Common Fund Data Resources
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PHAROS:  P0C0S5
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
HISTONE H2BF [auth D], J [auth H]126Xenopus laevisMutation(s): 0 
UniProt
Find proteins for P02281 (Xenopus laevis)
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Entity ID: 1
MoleculeChainsLengthOrganismImage
PALINDROMIC 146 BASE PAIR DNA FRAGMENTA [auth I], B [auth J]146N/A
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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.193 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.66α = 90
b = 183.207β = 90
c = 109.922γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-11-27
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance