3AZH

Crystal Structure of Human Nucleosome Core Particle Containing H3K122Q mutation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.49 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.190 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Comprehensive Structural Analysis of Mutant Nucleosomes Containing Lysine to Glutamine (KQ) Substitutions in the H3 and H4 Histone-Fold Domains

Iwasaki, W.Tachiwana, H.Kawaguchi, K.Shibata, T.Kagawa, W.Kurumizaka, H.

(2011) Biochemistry 50: 7822-7832

  • DOI: https://doi.org/10.1021/bi201021h
  • Primary Citation of Related Structures:  
    3AYW, 3AZE, 3AZF, 3AZG, 3AZH, 3AZI, 3AZJ, 3AZK, 3AZL, 3AZM, 3AZN

  • PubMed Abstract: 

    Post-translational modifications (PTMs) of histones play important roles in regulating the structure and function of chromatin in eukaryotes. Although histone PTMs were considered to mainly occur at the N-terminal tails of histones, recent studies have revealed that PTMs also exist in the histone-fold domains, which are commonly shared among the core histones H2A, H2B, H3, and H4. The lysine residue is a major target for histone PTM, and the lysine to glutamine (KQ) substitution is known to mimic the acetylated states of specific histone lysine residues in vivo. Human histones H3 and H4 contain 11 lysine residues in their histone-fold domains (five for H3 and six for H4), and eight of these lysine residues are known to be targets for acetylation. In the present study, we prepared 11 mutant nucleosomes, in which each of the lysine residues of the H3 and H4 histone-fold domains was replaced by glutamine: H3 K56Q, H3 K64Q, H3 K79Q, H3 K115Q, H3 K122Q, H4 K31Q, H4 K44Q, H4 K59Q, H4 K77Q, H4 K79Q, and H4 K91Q. The crystal structures of these mutant nucleosomes were determined at 2.4-3.5 Å resolutions. Some of these amino acid substitutions altered the local protein-DNA interactions and the interactions between amino acid residues within the nucleosome. Interestingly, the C-terminal region of H2A was significantly disordered in the nucleosome containing H4 K44Q. These results provide an important structural basis for understanding how histone modifications and mutations affect chromatin structure and function.


  • Organizational Affiliation

    Laboratory of Structural Biology, Graduate School of Advanced Science and Engineering, Waseda University, 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): 1 
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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 
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Find proteins for P62805 (Homo sapiens)
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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 
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Find proteins for P04908 (Homo sapiens)
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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 
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PHAROS:  P06899
GTEx:  ENSG00000124635 
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Entity ID: 5
MoleculeChains LengthOrganismImage
146-MER DNA
I, J
146N/A
Sequence Annotations
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Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download Ideal Coordinates CCD File 
L [auth D]
O [auth I]
P [auth I]
Q [auth I]
R [auth I]
L [auth D],
O [auth I],
P [auth I],
Q [auth I],
R [auth I],
S [auth I],
T [auth I],
U [auth J],
V [auth J],
W [auth J],
X [auth J],
Y [auth J]
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
K [auth C],
M [auth E],
N [auth G]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.49 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.190 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 106.077α = 90
b = 109.664β = 90
c = 181.826γ = 90
Software Package:
Software NamePurpose
BSSdata collection
MOLREPphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-09-21
    Type: Initial release
  • Version 1.1: 2012-08-01
    Changes: Structure summary
  • Version 1.2: 2023-11-01
    Changes: Data collection, Database references, Derived calculations, Refinement description