5WCU

Crystal structure of 167 bp nucleosome bound to the globular domain of linker histone H5


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 5.53 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.195 

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Literature

Revisit of Reconstituted 30-nm Nucleosome Arrays Reveals an Ensemble of Dynamic Structures.

Zhou, B.R.Jiang, J.Ghirlando, R.Norouzi, D.Sathish Yadav, K.N.Feng, H.Wang, R.Zhang, P.Zhurkin, V.Bai, Y.

(2018) J Mol Biol 430: 3093-3110

  • DOI: 10.1016/j.jmb.2018.06.020
  • Primary Citation of Related Structures:  
    5WCU

  • PubMed Abstract: 
  • It has long been suggested that chromatin may form a fiber with a diameter of ~30 nm that suppresses transcription. Despite nearly four decades of study, the structural nature of the 30-nm chromatin fiber and conclusive evidence of its existence in vivo ...

    It has long been suggested that chromatin may form a fiber with a diameter of ~30 nm that suppresses transcription. Despite nearly four decades of study, the structural nature of the 30-nm chromatin fiber and conclusive evidence of its existence in vivo remain elusive. The key support for the existence of specific 30-nm chromatin fiber structures is based on the determination of the structures of reconstituted nucleosome arrays using X-ray crystallography and single-particle cryo-electron microscopy coupled with glutaraldehyde chemical cross-linking. Here we report the characterization of these nucleosome arrays in solution using analytical ultracentrifugation, NMR, and small-angle X-ray scattering. We found that the physical properties of these nucleosome arrays in solution are not consistent with formation of just a few discrete structures of nucleosome arrays. In addition, we obtained a crystal of the nucleosome in complex with the globular domain of linker histone H5 that shows a new form of nucleosome packing and suggests a plausible alternative compact conformation for nucleosome arrays. Taken together, our results challenge the key evidence for the existence of a limited number of structures of reconstituted nucleosome arrays in solution by revealing that the reconstituted nucleosome arrays are actually best described as an ensemble of various conformations with a zigzagged arrangement of nucleosomes. Our finding has implications for understanding the structure and function of chromatin in vivo.


    Organizational Affiliation

    Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA. Electronic address: baiyaw@mail.nih.gov.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H3 AEKO98Drosophila melanogasterMutation(s): 0 
Gene Names: 
Find proteins for P02299 (Drosophila melanogaster)
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H4 BFLP82Drosophila melanogasterMutation(s): 0 
Gene Names: 
Find proteins for P84040 (Drosophila melanogaster)
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H2A CGMQ104Drosophila melanogasterMutation(s): 0 
Gene Names: 
Find proteins for P84051 (Drosophila melanogaster)
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H2B DHNR94Drosophila melanogasterMutation(s): 0 
Gene Names: 
Find proteins for P02283 (Drosophila melanogaster)
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H5 UV76Gallus gallusMutation(s): 0 
Find proteins for P02259 (Gallus gallus)
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Go to UniProtKB:  P02259
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  • Reference Sequence
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Entity ID: 5
MoleculeChainsLengthOrganismImage
DNA (167-MER)I, S167synthetic construct
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Entity ID: 6
MoleculeChainsLengthOrganismImage
DNA (167-MER)J, T167synthetic construct
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 5.53 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.195 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.926α = 100.79
b = 108.543β = 90.08
c = 180.77γ = 89.94
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-10-31
    Type: Initial release