5CPK

Nucleosome containing methylated Sat2L DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.63 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.226 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Influence of DNA methylation on positioning and DNA flexibility of nucleosomes with pericentric satellite DNA.

Osakabe, A.Adachi, F.Arimura, Y.Maehara, K.Ohkawa, Y.Kurumizaka, H.

(2015) Open Biol 5

  • DOI: https://doi.org/10.1098/rsob.150128
  • Primary Citation of Related Structures:  
    5CPI, 5CPJ, 5CPK

  • PubMed Abstract: 

    DNA methylation occurs on CpG sites and is important to form pericentric heterochromatin domains. The satellite 2 sequence, containing seven CpG sites, is located in the pericentric region of human chromosome 1 and is highly methylated in normal cells. In contrast, the satellite 2 region is reportedly hypomethylated in cancer cells, suggesting that the methylation status may affect the chromatin structure around the pericentric regions in tumours. In this study, we mapped the nucleosome positioning on the satellite 2 sequence in vitro and found that DNA methylation modestly affects the distribution of the nucleosome positioning. The micrococcal nuclease assay revealed that the DNA end flexibility of the nucleosomes changes, depending on the DNA methylation status. However, the structures and thermal stabilities of the nucleosomes are unaffected by DNA methylation. These findings provide new information to understand how DNA methylation functions in regulating pericentric heterochromatin formation and maintenance in normal and malignant cells.


  • Organizational Affiliation

    Laboratory of Structural Biology, Graduate School of Advanced Science and Engineering, Waseda University, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H3.1
A, E
139Homo sapiensMutation(s): 0 
Gene Names: 
UniProt & NIH Common Fund Data Resources
Find proteins for P68431 (Homo sapiens)
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Go to UniProtKB:  P68431
PHAROS:  P68431
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UniProt GroupP68431
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H4
B, F
106Homo sapiensMutation(s): 0 
Gene Names: 
UniProt & NIH Common Fund Data Resources
Find proteins for P62805 (Homo sapiens)
Explore P62805 
Go to UniProtKB:  P62805
PHAROS:  P62805
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UniProt GroupP62805
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H2A type 1-B/E
C, G
133Homo sapiensMutation(s): 0 
Gene Names: HIST1H2ABH2AFMHIST1H2AEH2AFA
UniProt & NIH Common Fund Data Resources
Find proteins for P04908 (Homo sapiens)
Explore P04908 
Go to UniProtKB:  P04908
PHAROS:  P04908
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UniProt GroupP04908
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H2B type 1-J
D, H
129Homo sapiensMutation(s): 0 
Gene Names: HIST1H2BJH2BFR
UniProt & NIH Common Fund Data Resources
Find proteins for P06899 (Homo sapiens)
Explore P06899 
Go to UniProtKB:  P06899
PHAROS:  P06899
GTEx:  ENSG00000124635 
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UniProt GroupP06899
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Entity ID: 5
MoleculeChains LengthOrganismImage
DNA (145-MER)145Homo sapiens
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Entity ID: 6
MoleculeChains LengthOrganismImage
DNA (145-MER)145Homo sapiens
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.63 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.226 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.197α = 90
b = 109.297β = 90
c = 173.686γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
MEXT KAKENHIJapan25116002
the Platform for Drug Discovery, Informatics, and Structural Life Science from MEXTJapan--
JSPS KAKENHIJapan26840025

Revision History  (Full details and data files)

  • Version 1.0: 2015-10-28
    Type: Initial release
  • Version 1.1: 2020-02-19
    Changes: Data collection, Derived calculations
  • Version 1.2: 2023-11-08
    Changes: Data collection, Database references, Refinement description