SAXSdb — 9b3p

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1. Protein Identity and Related Structures Protein Identity & Related Structures

Histone H3.3

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 8 DNA 2	Histone H4 × 2 （P62799） Histone H2A.Z × 2 （P0C0S6） Histone H2B 1.1 × 2 （P02281） DNA (128-MER) × 1 DNA (128-MER) × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	H33_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–136； UniProt 1–136 Author chain E； PDBConstruct 1–136； UniProt 1–136

Histone H4

Xenopus laevis

UniProt P62799

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 8 DNA 2	Histone H3.3 × 2 （P84243） Histone H2A.Z × 2 （P0C0S6） Histone H2B 1.1 × 2 （P02281） DNA (128-MER) × 1 DNA (128-MER) × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	H4_XENLA
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–103； UniProt 1–103 Author chain F； PDBConstruct 1–103； UniProt 1–103

Histone H2A.Z

Mus musculus

UniProt P0C0S6

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 8 DNA 2	Histone H3.3 × 2 （P84243） Histone H4 × 2 （P62799） Histone H2B 1.1 × 2 （P02281） DNA (128-MER) × 1 DNA (128-MER) × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	H2AZ_MOUSE
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain C； PDBConstruct 1–128； UniProt 1–128 Author chain G； PDBConstruct 1–128； UniProt 1–128

Histone H2B 1.1

Xenopus laevis

UniProt P02281

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 8 DNA 2	Histone H3.3 × 2 （P84243） Histone H4 × 2 （P62799） Histone H2A.Z × 2 （P0C0S6） DNA (128-MER) × 1 DNA (128-MER) × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	H2B11_XENLA
Isoform	—
PDB entities	4
Chains and sequence ranges	Author chain D； PDBConstruct 1–126； UniProt 1–126 Author chain H； PDBConstruct 1–126； UniProt 1–126

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	9b3p
Deposition date deposition_date	2024-03-19
Structure title title	The cryo-EM structure of the H2A.Z-H3.3 double-variant nucleosome
Keywords keywords	histone variant, nucleosome, chromatin, complex, STRUCTURAL PROTEIN, STRUCTURAL PROTEIN-DNA complex; STRUCTURAL PROTEIN/DNA
Experimental Method method	ELECTRON MICROSCOPY

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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

9b3p__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

9b3p__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

9b3p__assembly_1__model_1 | P(r) · Pending

P(r) will be calculated and displayed separately for the same assembly/model.

Rg（Guinier）	39.31 Å
Rg (electron density)	36.58 Å
Total Rg	37.35 Å
Atom count	11067
Residues	994
Excluded volume	180480 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`9b3p__assembly_1__model_1`	decameric （10）	Success	4.1.3-1-20251215 (887e7ef)	View Download

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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (6)

Entity 1 Entity 1 polymer

Description description	Histone H3.3
Molecular weight formula_weight	15361.0 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,E
Atom count atom_count	11067

MARTKQTARKSTGGKAPRKQLATKAARKSAPSTGGVKKPHRYRPGTVALREIRRYQKSTELLIRKLPFQRLVREIAQDFKTDLRFQSAAIGALQEASEAYLVGLFEDTNLCAIHAKRVTIMPKDIQLARRIRGERA

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 polymer

Description description	Histone H4
Molecular weight formula_weight	11394.4 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B,F

MSGRGKGGKGLGKGGAKRHRKVLRDNIQGITKPAIRRLARRGGVKRISGLIYEETRGVLKVFLENVIRDAVTYTEHAKRKTVTAMDVVYALKRQGRTLYGFGG

Source Source

Source organism organism	Xenopus laevis
Common name common_name	African clawed frog
NCBI taxonomy ID ncbi_taxonomy_id	8355
Host organism host_organism	Escherichia coli

Entity 3 Entity 3 polymer

Description description	Histone H2A.Z
Molecular weight formula_weight	13581.8 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C,G

MAGGKAGKDSGKAKTKAVSRSQRAGLQFPVGRIHRHLKSRTTSHGRVGATAAVYSAAILEYLTAEVLELAGNASKDLKVKRITPRHLQLAIRGDEELDSLIKATIAGGGVIPHIHKSLIGKKGQQKTV

Source Source

Source organism organism	Mus musculus
Common name common_name	house mouse
NCBI taxonomy ID ncbi_taxonomy_id	10090
Host organism host_organism	Escherichia coli

Entity 4 Entity 4 polymer

Description description	Histone H2B 1.1
Molecular weight formula_weight	13965.3 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	D,H

MPEPAKSAPAPKKGSKKAVTKTQKKDGKKRRKSRKESYAIYVYKVLKQVHPDTGISSKAMSIMNSFVNDVFERIAGEASRLAHYNKRSTITSREIQTAVRLLLPGELAKHAVSEGTKAVTKYTSAK

Source Source

Source organism organism	Xenopus laevis
Common name common_name	African clawed frog
NCBI taxonomy ID ncbi_taxonomy_id	8355
Host organism host_organism	Escherichia coli

Entity 5 Entity 5 polymer

Description description	DNA (128-MER)
Molecular weight formula_weight	45604.0 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polydeoxyribonucleotide
Chain IDs strand_id	I

ACAGGATGTATATATCTGACACGTGCCTGGAGACTAGGGAGTAATCCCCTTGGCGGTTAAAACGCGGGGGACAGCGCGTACGTGCGTTTAAGCGGTGCTAGAGCTGTCTACGACCAATTGAGCGGCCTCGGCACCGGGATTCTCCAG

Source Source

Source organism organism	synthetic construct
NCBI taxonomy ID ncbi_taxonomy_id	32630
Host organism host_organism	Escherichia coli

Entity 6 Entity 6 polymer

Description description	DNA (128-MER)
Molecular weight formula_weight	51269.7 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polydeoxyribonucleotide
Chain IDs strand_id	J

ATCCCGCCCTGGAGAATCCCGGTGCCGAGGCCGCTCAATTGGTCGTAGACAGCTCTAGCACCGCTTAAACGCACGTACGCGCTGTCCCCCGCGTTTTAACCGCCAAGGGGATTACTCCCTAGTCTCCAGGCACGTGTCAGATATATACATCCTGTGCATGACTAGAT

Source Source

Source organism organism	synthetic construct
NCBI taxonomy ID ncbi_taxonomy_id	32630
Host organism host_organism	Escherichia coli

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Resolution resolution	3.00 Å
Resolution测定Method resolution_method	—
颗粒数 num_particles	205792

The cryo-EM structure of the H2A.Z-H3.3 double-variant nucleosome

1. Protein Identity and Related Structures Protein Identity & Related Structures

Histone H3.3

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Histone H4

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Histone H2A.Z

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Histone H2B 1.1

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

9b3p__assembly_1__model_1

9b3p__assembly_1__model_1 | I(q)

9b3p__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

冷冻电镜 EM 3D

5. Entities and Polymers Entities & Polymers (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

Entity 4 Entity 4 polymer

Polymer Polymer

Source Source

Entity 5 Entity 5 polymer

Polymer Polymer

Source Source

Entity 6 Entity 6 polymer

Polymer Polymer

Source Source

7. Citations (1)