6mh7

Crystal structure of the first bromodomain of human BRD4 in complex with SKT-68, a 1,4,5-trisubstituted imidazole analogue

Method: X-RAY DIFFRACTION Dmax: 74.7 Å Quality: REASONABLE

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

Bromodomain-containing protein 4

Homo sapiens

UniProt O60885

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 monomer Monomer Protein × 1 PDB declaration: monomeric(1) Consistent with protein copy count Chain A; UniProt 44–168 Fragment:UNP residues 44-168 JQY N-(3,4-dimethylphenyl)-4-[4-(4-fluorophenyl)-1-(piperidin-4-yl)-1H-imidazol-5-yl]pyrimidin-2-amine × 1 DMS DIMETHYL SULFOXIDE × 1 EDO 1,2-ETHANEDIOL × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.5;291 K;12.5 mg/mL BRD4, 5 mM HEPES, pH 7.5, 50 mM sodium chloride, 0.5 mM DTT, 50 mM Tris, pH 8.5, 0.1 M ammonium sulfate, 12.5% PEG3350, 10% DMSO, 1 mM SKT-68 Resolution 1.74 Å R-free 0.185
2 Protein monomer Monomer Protein × 1 PDB declaration: monomeric(1) Consistent with protein copy count Chain B; UniProt 44–168 Fragment:UNP residues 44-168 JQY N-(3,4-dimethylphenyl)-4-[4-(4-fluorophenyl)-1-(piperidin-4-yl)-1H-imidazol-5-yl]pyrimidin-2-amine × 1 EDO 1,2-ETHANEDIOL × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.5;291 K;12.5 mg/mL BRD4, 5 mM HEPES, pH 7.5, 50 mM sodium chloride, 0.5 mM DTT, 50 mM Tris, pH 8.5, 0.1 M ammonium sulfate, 12.5% PEG3350, 10% DMSO, 1 mM SKT-68 Resolution 1.74 Å R-free 0.185

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.

601 other PDB entries and 777 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name BRD4_HUMAN
Isoform O60885-3
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 3–127; UniProt 44–168 Author chain B; PDBConstruct 3–127; UniProt 44–168

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 6mh7

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 6mh7
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2. Structure Basics 2. Structure Basics

Entry ID entry_id6mh7
Deposition date deposition_date2018-09-17
Structure title titleCrystal structure of the first bromodomain of human BRD4 in complex with SKT-68, a 1,4,5-trisubstituted imidazole analogue
Keywords keywords;bromodomain, CAP, HUNK1, MCAP, PROTEIN BINDING-INHIBITOR complex, inhibitor, transcription-inhibitor complex, inflammation, 19F-NMR, MAP-kinase inhibition ;; PROTEIN BINDING/INHIBITOR
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier22.20
Radius of gyration Rg (electron density) rg_electron21.43
Forward intensity I(0) i015872100.00
Molecular weight molecular_weight31380.0 kDa
Excluded volume excluded_volume39810 ų
Envelope volume envelope_volume47664 ų
Hydration-shell volume shell_volume19354 ų
Envelope diameter envelope_diameter78.5
Shell Rg shell_rg27.18
Envelope Rg envelope_rg21.57
Shape Rg shape_rg21.41
Total Rg total_rg22.30
Total atoms total_atoms4406
Residues n_residues254
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 dmax74.7
Rg (real space) rg_real22.26
Rg uncertainty (real space) rg_real_error0.57
I(0) (real space) i0_real1.5870e+07
I(0) uncertainty (real space) i0_real_error2.0560e+05
Rg (reciprocal space) rg_reciprocal22.25
I(0) (reciprocal space) i0_reciprocal15870000.0000
Solution quality estimate total_estimate0.6031
Solution quality rating solution_quality REASONABLE a REASONABLE solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary26.7
Skewness Skewness skewness0.416
Kurtosis Kurtosis kurtosis-0.220
Angular range angular_range— – 0.3600 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha5207000.0000
Real-space data points n_real_points68
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.831; Stabil: 1.000; Sysdev: 0.145; Positv: 1.000; Valcen: 0.908; Smooth: 0.000

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (5)

7. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (4 domains)

Domain ID domain_idd6mh7a1
Class classa — All alpha proteins
Fold Fold folda.29 — Bromodomain-like
Superfamily Superfamily superfamilya.29.2 — Bromodomain
Family Family familya.29.2.0 — automated matches
Domain ID domain_idd6mh7a2
Class classl — Artifacts
Fold Fold foldl.1 — Tags
Superfamily Superfamily superfamilyl.1.1 — Tags
Family Family familyl.1.1.1 — Tags
Domain ID domain_idd6mh7b1
Class classa — All alpha proteins
Fold Fold folda.29 — Bromodomain-like
Superfamily Superfamily superfamilya.29.2 — Bromodomain
Family Family familya.29.2.0 — automated matches
Domain ID domain_idd6mh7b2
Class classl — Artifacts
Fold Fold foldl.1 — Tags
Superfamily Superfamily superfamilyl.1.1 — Tags
Family Family familyl.1.1.1 — Tags

CATH v4.4 (2 domains)

Domain ID domain_id6mh7A01
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology920 — Histone Acetyltransferase; Chain A
Homologous superfamily homologous superfamily10 — Bromodomain-like
Domain ID domain_id6mh7B01
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)