2e3k

Crystal structure of the human Brd2 second bromodomain in complexed with the acetylated histone H4 peptide

Method: X-RAY DIFFRACTION Dmax: 93.1 Å Quality: GOOD

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

Bromodomain-containing protein 2

Homo sapiens

UniProt P25440

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 heterocomplex Heteromer Protein × 3 PDB declaration: trimeric(3) Consistent with protein copy count Chain A; UniProt 348–455 Chain C; UniProt 348–455 Fragment:The second bromodomain, BD2, residues 348-455 15-mer peptide from Histone H4 × 1 (P02309) X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 6.5;298 K;PEG4000, Ammonium Acetate,, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 298K Resolution 2.30 Å R-free 0.268
2 Protein heterocomplex Heteromer Protein × 3 PDB declaration: trimeric(3) Consistent with protein copy count Chain B; UniProt 348–455 Chain D; UniProt 348–455 Fragment:The second bromodomain, BD2, residues 348-455 15-mer peptide from Histone H4 × 1 (P02309) X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 6.5;298 K;PEG4000, Ammonium Acetate,, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 298K Resolution 2.30 Å R-free 0.268

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.

164 other PDB entries and 263 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name BRD2_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 5–112; UniProt 348–455 Author chain B; PDBConstruct 5–112; UniProt 348–455 Author chain C; PDBConstruct 5–112; UniProt 348–455 Author chain D; PDBConstruct 5–112; UniProt 348–455

15-mer peptide from Histone H4

OrganismNot specified

UniProt P02309

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 heterocomplex Heteromer Protein × 3 PDB declaration: trimeric(3) Consistent with protein copy count Chain Q; UniProt 1–15 Fragment:N-terminal H4 di-acetylated tail Non-standard monomer:Yes (specific site not provided by mmCIF) Bromodomain-containing protein 2 × 2 (P25440) X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 6.5;298 K;PEG4000, Ammonium Acetate,, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 298K Resolution 2.30 Å R-free 0.268
2 Protein heterocomplex Heteromer Protein × 3 PDB declaration: trimeric(3) Consistent with protein copy count Chain R; UniProt 1–15 Fragment:N-terminal H4 di-acetylated tail Non-standard monomer:Yes (specific site not provided by mmCIF) Bromodomain-containing protein 2 × 2 (P25440) X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 6.5;298 K;PEG4000, Ammonium Acetate,, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 298K Resolution 2.30 Å R-free 0.268

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.

43 other PDB entries and 62 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name H4_YEAST
Isoform
PDB entities 2
Chains and sequence ranges Author chain Q; PDBConstruct 1–15; UniProt 1–15 Author chain R; PDBConstruct 1–15; UniProt 1–15

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 2e3k

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 2e3k
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2. Structure Basics 2. Structure Basics

Entry ID entry_id2e3k
Deposition date deposition_date2006-11-27
Structure title titleCrystal structure of the human Brd2 second bromodomain in complexed with the acetylated histone H4 peptide
Keywords keywords;Bromodomain, Binds to acetylated histone tails, Structural Genomics, NPPSFA, National Project on Protein Structural and Functional Analyses, RIKEN Structural Genomics/Proteomics Initiative, RSGI, TRANSCRIPTION ;; TRANSCRIPTION
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier28.43
Radius of gyration Rg (electron density) rg_electron27.50
Forward intensity I(0) i047833600.00
Molecular weight molecular_weight53550.0 kDa
Excluded volume excluded_volume66932 ų
Envelope volume envelope_volume87560 ų
Hydration-shell volume shell_volume26999 ų
Envelope diameter envelope_diameter95.9
Shell Rg shell_rg34.12
Envelope Rg envelope_rg27.76
Shape Rg shape_rg27.47
Total Rg total_rg28.31
Total atoms total_atoms3766
Residues n_residues459
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 dmax93.1
Rg (real space) rg_real28.53
Rg uncertainty (real space) rg_real_error0.69
I(0) (real space) i0_real4.7830e+07
I(0) uncertainty (real space) i0_real_error7.5060e+05
Rg (reciprocal space) rg_reciprocal28.50
I(0) (reciprocal space) i0_reciprocal47830000.0000
Solution quality estimate total_estimate0.8820
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary28.3
Skewness Skewness skewness0.357
Kurtosis Kurtosis kurtosis-0.558
Angular range angular_range— – 0.2800 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha8107000.0000
Real-space data points n_real_points57
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.880; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.910; Smooth: 0.912

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (3)

7. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id2e3kA00
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology920 — Histone Acetyltransferase; Chain A
Homologous superfamily homologous superfamily10 — Bromodomain-like
Domain ID domain_id2e3kB00
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology920 — Histone Acetyltransferase; Chain A
Homologous superfamily homologous superfamily10 — Bromodomain-like
Domain ID domain_id2e3kC00
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology920 — Histone Acetyltransferase; Chain A
Homologous superfamily homologous superfamily10 — Bromodomain-like
Domain ID domain_id2e3kD00
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology920 — Histone Acetyltransferase; Chain A
Homologous superfamily homologous superfamily10 — Bromodomain-like

8. Citations (1)

9. Files and Curves (10)