3X1T

Crystal structure of nucleosome core particle consisting of mouse testis specific histone variants H2aa and H2ba


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.81 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.212 

Starting Model: experimental
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This is version 1.1 of the entry. See complete history


Literature

Structural and functional analyses of nucleosome complexes with mouse histone variants TH2a and TH2b, involved in reprogramming

Padavattan, S.Shinagawa, T.Hasegawa, K.Kumasaka, T.Ishii, S.Kumarevel, T.

(2015) Biochem Biophys Res Commun 464: 929-935

  • DOI: https://doi.org/10.1016/j.bbrc.2015.07.070
  • Primary Citation of Related Structures:  
    3X1S, 3X1T, 3X1U, 3X1V

  • PubMed Abstract: 

    Histone variants TH2a and TH2b are highly expressed in testes, oocytes and zygotes. Our recent analysis suggested that these histone variants enhance the induced generation of pluripotent stem cells (iPSCs) when co-expressed along with four transcription factors, Oct3/4, Sox2, Klf4 and c-Myc (OSKM), and are associated with an open chromatin structure [1]. In the present study, we report the crystal structures of nucleosomes (NCPs) with the mouse histone variants, TH2a and TH2b. The structures revealed two significant changes, as compared to the canonical counterparts: fewer histone-DNA contacts and changes in dimer-dimer interactions between TH2a-TH2a' (L1-loop). In vivo studies with domain swapping and point mutants of the variants revealed that the residues in the histone tails and the TH2a-L1 loop are important for reprogramming. Taken together, our work indicates that the NCP variants with structural modifications and flexible tails are most likely important for enhanced reprogramming of functions.


  • Organizational Affiliation

    RIKEN SPring-8 Center, Harima Institute, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan.


Macromolecules

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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H3.1C [auth A],
G [auth E]
135Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P68431 (Homo sapiens)
Explore P68431 
Go to UniProtKB:  P68431
PHAROS:  P68431
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UniProt GroupP68431
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H4D [auth B],
H [auth F]
102Homo sapiensMutation(s): 0 
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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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H2AE [auth C],
I [auth G]
128Mus musculusMutation(s): 0 
UniProt
Find proteins for Q8CGP4 (Mus musculus)
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Go to UniProtKB:  Q8CGP4
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UniProt GroupQ8CGP4
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H2B type 1-AF [auth D],
J [auth H]
126Mus musculusMutation(s): 0 
UniProt
Find proteins for P70696 (Mus musculus)
Explore P70696 
Go to UniProtKB:  P70696
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UniProt GroupP70696
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Entity ID: 1
MoleculeChains LengthOrganismImage
DNA (146-MER)A [auth I],
B [auth J]
146synthetic construct
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download Ideal Coordinates CCD File 
AA [auth J]
BA [auth J]
HA [auth A]
JA [auth D]
K [auth I]
AA [auth J],
BA [auth J],
HA [auth A],
JA [auth D],
K [auth I],
KA [auth D],
L [auth I],
M [auth I],
N [auth I],
NA [auth G],
O [auth I],
P [auth I],
Q [auth I],
R [auth I],
S [auth I],
T [auth I],
U [auth I],
V [auth J],
W [auth J],
X [auth J],
Y [auth J],
Z [auth J]
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
CA [auth J]
DA [auth J]
EA [auth J]
FA [auth J]
GA [auth J]
CA [auth J],
DA [auth J],
EA [auth J],
FA [auth J],
GA [auth J],
IA [auth B],
LA [auth D],
MA [auth D]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.81 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.212 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.771α = 90
b = 109.597β = 90
c = 181.597γ = 90
Software Package:
Software NamePurpose
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
PHENIXrefinement
HKL-2000data collection
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: 2015-09-23
    Type: Initial release
  • Version 1.1: 2023-11-08
    Changes: Data collection, Database references, Derived calculations, Refinement description