3kwq

Structural characterization of H3K56Q nucleosomes and nucleosomal arrays

Method: X-RAY DIFFRACTION Dmax: 117.6 Å Quality: EXCELLENT

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

Histone H3.2

Xenopus laevis

UniProt P84233

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein–DNA Heteromer Protein × 8 DNA 2 PDB declaration: decameric(10) Consistent with all polymer counts Chain A; UniProt 39–136 Chain E; UniProt 39–136 Fragment:UNP residues 39-136 Mutation:K57E Histone H4 × 2 (P62799) Histone H2A × 2 (Q6AZJ8) Histone H2B 1.1 × 2 (P02281) DNA (146-MER) × 2 X-RAY DIFFRACTION mmCIF provides none of the parsed experimental conditions Resolution 3.50 Å R-free 0.315

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

230 other PDB entries and 239 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name H32_XENLA
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–98; UniProt 39–136 Author chain E; PDBConstruct 1–98; UniProt 39–136

Histone H4

Xenopus laevis

UniProt P62799

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein–DNA Heteromer Protein × 8 DNA 2 PDB declaration: decameric(10) Consistent with all polymer counts Chain B; UniProt 21–103 Chain F; UniProt 21–103 Fragment:UNP residues 21-103 Histone H3.2 × 2 (P84233) Histone H2A × 2 (Q6AZJ8) Histone H2B 1.1 × 2 (P02281) DNA (146-MER) × 2 X-RAY DIFFRACTION mmCIF provides none of the parsed experimental conditions Resolution 3.50 Å R-free 0.315

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

354 other PDB entries and 370 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name H4_XENLA
Isoform
PDB entities 2
Chains and sequence ranges Author chain B; PDBConstruct 1–83; UniProt 21–103 Author chain F; PDBConstruct 1–83; UniProt 21–103

Histone H2A

Xenopus laevis

UniProt Q6AZJ8

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein–DNA Heteromer Protein × 8 DNA 2 PDB declaration: decameric(10) Consistent with all polymer counts Chain C; UniProt 15–121 Chain G; UniProt 15–121 Fragment:UNP residues 15-121 Histone H3.2 × 2 (P84233) Histone H4 × 2 (P62799) Histone H2B 1.1 × 2 (P02281) DNA (146-MER) × 2 X-RAY DIFFRACTION mmCIF provides none of the parsed experimental conditions Resolution 3.50 Å R-free 0.315

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

226 other PDB entries and 238 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name Q6AZJ8_XENLA
Isoform
PDB entities 3
Chains and sequence ranges Author chain C; PDBConstruct 1–107; UniProt 15–121 Author chain G; PDBConstruct 1–107; UniProt 15–121

Histone H2B 1.1

Xenopus laevis

UniProt P02281

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein–DNA Heteromer Protein × 8 DNA 2 PDB declaration: decameric(10) Consistent with all polymer counts Chain D; UniProt 34–126 Chain H; UniProt 34–126 Fragment:UNP residues 34-126 Histone H3.2 × 2 (P84233) Histone H4 × 2 (P62799) Histone H2A × 2 (Q6AZJ8) DNA (146-MER) × 2 X-RAY DIFFRACTION mmCIF provides none of the parsed experimental conditions Resolution 3.50 Å R-free 0.315

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

310 other PDB entries and 327 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name H2B11_XENLA
Isoform
PDB entities 4
Chains and sequence ranges Author chain D; PDBConstruct 1–93; UniProt 34–126 Author chain H; PDBConstruct 1–93; UniProt 34–126

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.

SAXS scattering curve SAXS Profile

SAXS profile for 3kwq

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 3kwq
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2. Structure Basics 2. Structure Basics

Entry ID entry_id3kwq
Deposition date deposition_date2009-12-01
Structure title titleStructural characterization of H3K56Q nucleosomes and nucleosomal arrays
Keywords keywords;Nucleosome Transcription K56 mutation, Acetylation, Chromosomal protein, DNA-binding, Methylation, Nucleosome core, Nucleus, Phosphoprotein, Isopeptide bond, Ubl conjugation, Structural Protein-DNA complex ;; Structural Protein/DNA
Experimental Method methodX-RAY DIFFRACTION

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier39.92
Radius of gyration Rg (electron density) rg_electron37.19
Forward intensity I(0) i0824202000.00
Molecular weight molecular_weight175690.0 kDa
Excluded volume excluded_volume195130 ų
Envelope volume envelope_volume289240 ų
Hydration-shell volume shell_volume62961 ų
Envelope diameter envelope_diameter118.7
Shell Rg shell_rg44.97
Envelope Rg envelope_rg36.68
Shape Rg shape_rg37.02
Total Rg total_rg37.91
Total atoms total_atoms11987
Residues n_residues1049
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 −1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax117.6
Rg (real space) rg_real39.65
Rg uncertainty (real space) rg_real_error0.94
I(0) (real space) i0_real8.2420e+08
I(0) uncertainty (real space) i0_real_error1.3930e+07
Rg (reciprocal space) rg_reciprocal39.83
I(0) (reciprocal space) i0_reciprocal824300000.0000
Solution quality estimate total_estimate0.9017
Solution quality rating solution_quality EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary47.0
Skewness Skewness skewness0.086
Kurtosis Kurtosis kurtosis-0.699
Angular range angular_range— – 0.2000 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha72550000.0000
Real-space data points n_real_points41
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.978; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.987; Smooth: 0.797

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (6)

7. Fold Classification (SCOP + CATH) 8 domains

CATH v4.4 (8 domains)

Domain ID domain_id3kwqA00
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology20 — Histone, subunit A
Homologous superfamily homologous superfamily10 — Histone, subunit A
Domain ID domain_id3kwqB00
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology20 — Histone, subunit A
Homologous superfamily homologous superfamily10 — Histone, subunit A
Domain ID domain_id3kwqC00
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology20 — Histone, subunit A
Homologous superfamily homologous superfamily10 — Histone, subunit A
Domain ID domain_id3kwqD00
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology20 — Histone, subunit A
Homologous superfamily homologous superfamily10 — Histone, subunit A
Domain ID domain_id3kwqE00
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology20 — Histone, subunit A
Homologous superfamily homologous superfamily10 — Histone, subunit A
Domain ID domain_id3kwqF00
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology20 — Histone, subunit A
Homologous superfamily homologous superfamily10 — Histone, subunit A
Domain ID domain_id3kwqG00
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology20 — Histone, subunit A
Homologous superfamily homologous superfamily10 — Histone, subunit A
Domain ID domain_id3kwqH00
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology20 — Histone, subunit A
Homologous superfamily homologous superfamily10 — Histone, subunit A

8. Citations (1)

9. Files and Curves (10)