Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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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: 203316.80 
• Atom Count: 11939 
• Residue Count: 1306 
• Unique protein chains: 4
• Unique nucleic acid chains: 1

5B1L

The mouse nucleosome structure containing H3t

• DOI: 10.2210/pdb5B1L/pdb
• NDB: 5B1L

• Classification: STRUCTURAL PROTEIN/DNA
• Organism(s): Mus musculus, Homo sapiens
• Expression System: Escherichia coli, Escherichia coli BL21(DE3), Escherichia coli DH5[alpha]


• Deposited: 2015-12-08 Released: 2017-02-15 
• Deposition Author(s): Urahama, T., Machida, S., Horikoshi, N., Osakabe, A., Tachiwana, H., Taguchi, H., Kurumizaka, H.
• Funding Organization(s): the Japan Agency for Medical Research and Development (AMED); Ministry of Education, Culture, Sports, Science and Technology (MEXT) 

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.35 Å
• R-Value Free: 0.243 
• R-Value Work: 0.197 

Literature

Testis-Specific Histone Variant H3t Gene Is Essential for Entry into Spermatogenesis

Ueda, J., Harada, A., Urahama, T., Machida, S., Maehara, K., Hada, M., Makino, Y., Nogami, J., Horikoshi, N., Osakabe, A., Taguchi, H., Tanaka, H., Tachiwana, H., Yao, T., Yamada, M., Iwamoto, T., Isotani, A., Ikawa, M., Tachibana, T., Okada, Y., Kimura, H., Ohkawa, Y., Kurumizaka, H., Yamagata, K.

(2017) Cell Rep 18: 593-600

• PubMed: 28099840 
• DOI: 10.1016/j.celrep.2016.12.065
• Primary Citation of Related Structures:  
  5B1M


• PubMed Abstract: 
  

Cellular differentiation is associated with dynamic chromatin remodeling in establishing a cell-type-specific epigenomic landscape. Here, we find that mouse testis-specific and replication-dependent histone H3 variant H3t is essential for very early stages of spermatogenesis. H3t gene deficiency leads to azoospermia because of the loss of haploid germ cells. When differentiating spermatogonia emerge in normal spermatogenesis, H3t appears and replaces the canonical H3 proteins. Structural and biochemical analyses reveal that H3t-containing nucleosomes are more flexible than the canonical nucleosomes. Thus, by incorporating H3t into the genome during spermatogonial differentiation, male germ cells are able to enter meiosis and beyond.

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Organizational Affiliation: 

Center for Education in Laboratory Animal Research, Chubu University, Kasugai, Aichi 487-8501, Japan; Center for Genetic Analysis of Biological Responses, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamadaoka, Suita 565-0871, Japan. Electronic address: [e-mail].

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Histone H3t	A, E	139	Mus musculus	Gene Names: Hist1h3a, Hist1h3g, Hist1h3h, Hist1h3i (H3a, H3.1-221, H3g, H3.1-291, H3h, H3.1-I, H3i)
Find proteins for P68433 (Mus musculus) Go to UniProtKB:  P68433

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
Histone H4	B, F	106	Mus musculus	Gene Names: Hist1h4a, Hist1h4b, Hist1h4c, Hist1h4d, Hist1h4f, Hist1h4h, Hist1h4i, Hist1h4j, Hist1h4k, Hist1h4m, Hist2h4a, Hist4h4 (H4-53, H4-12, Hist2h4)
Find proteins for P62806 (Mus musculus) Go to UniProtKB:  P62806

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details
Histone H2A type 1	C, G	133	Mus musculus	Gene Names: Hist1h2ai
Find proteins for C0HKE6 (Mus musculus) Go to UniProtKB:  C0HKE6

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details
Histone H2B type 3-A	D, H	129	Mus musculus	Gene Names: Hist3h2ba
Find proteins for Q9D2U9 (Mus musculus) Go to UniProtKB:  Q9D2U9

Entity ID: 5
Molecule	Chains	Length	Organism
DNA (146-MER)	I,J	146	Homo sapiens

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: 2.35 Å
• R-Value Free: 0.243 
• R-Value Work: 0.197 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 98.968	α = 90.00
b = 107.425	β = 90.00
c = 167.332	γ = 90.00

Software Package:

Software Name	Purpose
PDB_EXTRACT	data extraction
PHENIX	refinement
PHASER	phasing
HKL-2000	data scaling
HKL-2000	data collection

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2015-12-08 
• Released Date: 2017-02-15 
• Deposition Author(s): Urahama, T., Machida, S., Horikoshi, N., Osakabe, A., Tachiwana, H., Taguchi, H., Kurumizaka, H.

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Funding Organization	Country	Grant Number
the Japan Agency for Medical Research and Development (AMED)	Japan	--
Ministry of Education, Culture, Sports, Science and Technology (MEXT)	Japan	25116002

Revision History 

• Version 1.0: 2017-02-15
  Type: Initial release