Biological Assembly 1  

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 8-mer - A2B2C2D2 Pseudo Symmetry: Cyclic - C2  (3D View)
Pseudo Stoichiometry: Hetero 8-mer -A6B2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 203029.66 
• Atom Count: 11954 
• Residue Count: 1306 
• Unique protein chains: 4
• Unique nucleic acid chains: 1

3AZF

Crystal Structure of Human Nucleosome Core Particle Containing H3K79Q mutation

• DOI: 10.2210/pdb3AZF/pdb
• NDB: NA1141

• Classification: STRUCTURAL PROTEIN/DNA
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): 1 


• Deposited: 2011-05-25 Released: 2011-09-21 
• Deposition Author(s): Iwasaki, W., Tachiwana, H., Kawaguchi, K., Shibata, T., Kagawa, W., Kurumizaka, H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.7 Å
• R-Value Free: 0.263 
• R-Value Work: 0.213 

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

• PubMed: 21812398 
• DOI: 10.1021/bi201021h
• Primary Citation of Related Structures:  
  3AZN, 3AZM, 3AZL, 3AZK, 3AZJ, 3AZI, 3AZH, 3AZG, 3AZE, 3AYW


• 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.

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Organizational Affiliation: 

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

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Histone H3.1	A, E	139	Homo sapiens	Mutations: K83Q Gene Names: HIST1H3A, HIST1H3B, HIST1H3C, HIST1H3D, HIST1H3E, HIST1H3F, HIST1H3G, HIST1H3H, HIST1H3I, HIST1H3J (H3FA, H3FL, H3FC, H3FB, H3FD, H3FI, H3FH, H3FK, H3FF, H3FJ)
Find proteins for P68431 (Homo sapiens) Go to Gene View: HIST1H3A HIST1H3B HIST1H3C HIST1H3D HIST1H3E HIST1H3F HIST1H3G HIST1H3H HIST1H3I HIST1H3J Go to UniProtKB:  P68431

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
Histone H4	B, F	106	Homo sapiens	Gene Names: HIST1H4A, HIST1H4B, HIST1H4C, HIST1H4D, HIST1H4E, HIST1H4F, HIST1H4H, HIST1H4I, HIST1H4J, HIST1H4K, HIST1H4L, HIST2H4A, HIST2H4B, HIST4H4 (H4/A, H4FA, H4/I, H4FI, H4/G, H4FG, H4/B, H4FB, H4/J, H4FJ, H4/C, H4FC, H4/H, H4FH, H4/M, H4FM, H4/E, H4FE, H4/D, H4FD, H4/K, H4FK, H4/N, H4F2, H4FN, HIST2H4, H4/O, H4FO)
Find proteins for P62805 (Homo sapiens) Go to Gene View: HIST1H4A HIST1H4B HIST1H4C HIST1H4D HIST1H4E HIST1H4F HIST1H4H HIST1H4I HIST1H4J HIST1H4K HIST1H4L HIST2H4A HIST2H4B HIST4H4 Go to UniProtKB:  P62805

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details
Histone H2A type 1-B/E	C, G	133	Homo sapiens	Gene Names: HIST1H2AB, HIST1H2AE (H2AFM, H2AFA)
Find proteins for P04908 (Homo sapiens) Go to Gene View: HIST1H2AB HIST1H2AE Go to UniProtKB:  P04908

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details
Histone H2B type 1-J	D, H	129	Homo sapiens	Gene Names: HIST1H2BJ (H2BFR)
Find proteins for P06899 (Homo sapiens) Go to Gene View: HIST1H2BJ Go to UniProtKB:  P06899

Entity ID: 5
Molecule	Chains	Length	Organism
146-MER DNA	I,J	146	N/A

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
MN	D, I, J	MANGANESE (II) ION Mn WAEMQWOKJMHJLA-UHFFFAOYSA-N
CL	A, C, E, G	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.7 Å
• R-Value Free: 0.263 
• R-Value Work: 0.213 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 106.552	α = 90.00
b = 109.780	β = 90.00
c = 182.217	γ = 90.00

Software Package:

Software Name	Purpose
HKL-2000	data reduction
CNS	refinement
BSS	data collection
MOLREP	phasing
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2011-05-25 
• Released Date: 2011-09-21 
• Deposition Author(s): Iwasaki, W., Tachiwana, H., Kawaguchi, K., Shibata, T., Kagawa, W., Kurumizaka, H.

Revision History 

• Version 1.0: 2011-09-21
  Type: Initial release
• Version 1.1: 2012-08-01
  Type: Structure summary