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
  • Primary Citation of Related Structures:  
    3UT9, 3UTA, 3UTB

  • 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 have remained elusive ...

    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 LengthOrganismDetailsImage
Histone H3.2A, E135Xenopus laevisMutation(s): 0 
UniProt
Find proteins for P84233 (Xenopus laevis)
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UniProt GroupP84233
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H4B, F102Xenopus laevisMutation(s): 0 
UniProt
Find proteins for P62799 (Xenopus laevis)
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UniProt GroupP62799
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H2AC, G129Xenopus laevisMutation(s): 0 
Gene Names: hist1h2aj, LOC494591
UniProt
Find proteins for P06897 (Xenopus laevis)
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UniProt GroupP06897
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H2B 1.1D, H125Xenopus laevisMutation(s): 0 
UniProt
Find proteins for P02281 (Xenopus laevis)
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UniProt GroupP02281
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Entity ID: 5
MoleculeChainsLengthOrganismImage
146-mer DNAI, J 146N/A
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Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4
Download Ideal Coordinates CCD File 
L [auth C],
N [auth D],
P [auth G]		SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L		 Ligand Interaction
MN
Query on MN
Download Ideal Coordinates CCD File 
AA [auth J],
BA [auth J],
CA [auth J],
DA [auth J],
EA [auth J],
AA [auth J],
BA [auth J],
CA [auth J],
DA [auth J],
EA [auth J],
FA [auth J],
GA [auth J],
HA [auth J],
K [auth A],
M [auth D],
O [auth E],
Q [auth I],
R [auth I],
S [auth I],
T [auth I],
U [auth I],
V [auth I],
W [auth I],
X [auth I],
Y [auth I],
Z [auth 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  (Full details and data files)

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