3UTB

Crystal Structure of Nucleosome Core Particle Assembled with the 146b Alpha-Satellite Sequence (NCP146b)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.233 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The mechanics behind DNA sequence-dependent properties of the nucleosome

Chua, E.Y.D.Vasudevan, D.Davey, G.E.Wu, B.Davey, C.A.

(2012) Nucleic Acids Res 40: 6338-6352

  • DOI: 10.1093/nar/gks261
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Chromatin organization and composition impart sophisticated regulatory features critical to eukaryotic genomic function. Although DNA sequence-dependent histone octamer binding is important for nucleosome activity, many aspects of this phenomenon hav ...

    Chromatin organization and composition impart sophisticated regulatory features critical to eukaryotic genomic function. Although DNA sequence-dependent histone octamer binding is important for nucleosome activity, many aspects of this phenomenon have remained elusive. We studied nucleosome structure and stability with diverse DNA sequences, including Widom 601 derivatives with the highest known octamer affinities, to establish a simple model behind the mechanics of sequence dependency. This uncovers the unique but unexpected role of TA dinucleotides and a propensity for G|C-rich sequence elements to conform energetically favourably at most locations around the histone octamer, which rationalizes G|C% as the most predictive factor for nucleosome occupancy in vivo. In addition, our findings reveal dominant constraints on double helix conformation by H3-H4 relative to H2A-H2B binding and DNA sequence context-dependency underlying nucleosome structure, positioning and stability. This provides a basis for improved prediction of nucleosomal properties and the design of tailored DNA constructs for chromatin investigations.


    Organizational Affiliation

    Division of Structural and Computational Biology, School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Histone H3.2
A, E
135Xenopus laevisMutation(s): 0 
Find proteins for P84233 (Xenopus laevis)
Go to UniProtKB:  P84233
Protein Feature View
  • Reference Sequence

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Histone H4
B, F
102Xenopus laevisMutation(s): 0 
Find proteins for P62799 (Xenopus laevis)
Go to UniProtKB:  P62799
Protein Feature View
  • Reference Sequence

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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Histone H2A
C, G
129Xenopus laevisMutation(s): 0 
Gene Names: hist1h2ajLOC494591
Find proteins for P06897 (Xenopus laevis)
Go to UniProtKB:  P06897
Protein Feature View
  • Reference Sequence

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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Histone H2B 1.1
D, H
125Xenopus laevisMutation(s): 0 
Find proteins for P02281 (Xenopus laevis)
Go to UniProtKB:  P02281
Protein Feature View
  • Reference Sequence

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Entity ID: 5
MoleculeChainsLengthOrganism
146-mer DNAI, J146N/A
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download CCD File 
C, D, G
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
MN
Query on MN

Download CCD File 
A, D, E, I, J
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.233 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.46α = 90
b = 109.28β = 90
c = 175.92γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-04-11
    Type: Initial release
  • Version 1.1: 2013-06-26
    Changes: Database references