SAXSdb — 4bw1

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

BROMODOMAIN-CONTAINING PROTEIN 4

HOMO SAPIENS

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	1,2-ETHANEDIOL × 3 4-[(2-tert-butylphenyl)amino]-7-(3,5-dimethyl-1,2-oxazol-4-yl)quinoline-3-carboxylic acid × 1 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	BRD4_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； 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.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	4bw1
Deposition date deposition_date	2013-06-29
Structure title title	The first bromodomain of human BRD4 in complex with 3,5 dimethylisoxaxole ligand
Keywords keywords	TRANSCRIPTION, INHIBITOR, HISTONE, EPIGENETIC READER, ANTAGONIST; TRANSCRIPTION
Experimental Method method	X-RAY DIFFRACTION

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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.

4bw1__assembly_1__model_1

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

Download this curve (.dat)

4bw1__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

4bw1__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	16.12 Å
Rg (electron density)	15.04 Å
Total Rg	16.19 Å
Atom count	1104
Residues	127
Excluded volume	19907 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`4bw1__assembly_1__model_1`	monomeric （1）	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 (4)

Entity 1 Entity 1 polymer

Description description	BROMODOMAIN-CONTAINING PROTEIN 4
Molecular weight formula_weight	15099.4 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	1301

SMNPPPPETSNPNKPKRQTNQLQYLLRVVLKTLWKHQFAWPFQQPVDAVKLNLPDYYKIIKTPMDMGTIKKRLENNYYWNAQECIQDFNTMFTNCYIYNKPGDDIVLMAEALEKLFLQKINELPTEE

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 non-polymer

Description description	1,2-ETHANEDIOL
Molecular weight formula_weight	62.1 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 3 Entity 3 non-polymer

Description description	4-[(2-tert-butylphenyl)amino]-7-(3,5-dimethyl-1,2-oxazol-4-yl)quinoline-3-carboxylic acid
Molecular weight formula_weight	415.5 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	178

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6. Fold Classification (SCOP + CATH) 3 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d4bw1a1
Class class	a — All alpha proteins
Fold Fold fold	a.29 — Bromodomain-like
Superfamily Superfamily superfamily	a.29.2 — Bromodomain
Family Family family	a.29.2.0 — automated matches

Domain ID domain_id	d4bw1a2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

CATH v4.4 (1 domains)

Domain ID domain_id	4bw1A01
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	920 — Histone Acetyltransferase; Chain A
Homologous superfamily homologous superfamily	10 — Bromodomain-like

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Unit-cell length a length_a	43.970 Å
Unit-cell length b length_b	47.810 Å
Unit-cell length c length_c	61.910 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	1.400 Å
Low-resolution limit resolution_low	37.840 Å
R factor r_factor	0.1901
R_work r_work	0.1891
R_free r_free	0.2079

The first bromodomain of human BRD4 in complex with 3,5 dimethylisoxaxole ligand

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

BROMODOMAIN-CONTAINING PROTEIN 4

State in the Current Structure

Other States of the Same Protein in the Database

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

4bw1__assembly_1__model_1

4bw1__assembly_1__model_1 | I(q)

4bw1__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 3 domains

SCOP 2.08 (2 domains)

CATH v4.4 (1 domains)

7. Citations (1)

The first bromodomain of human BRD4 in complex with 3,5 dimethylisoxaxole ligand

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

BROMODOMAIN-CONTAINING PROTEIN 4

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

4bw1__assembly_1__model_1

4bw1__assembly_1__model_1 | I(q)

4bw1__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 3 domains

SCOP 2.08 (2 domains)

CATH v4.4 (1 domains)

7. Citations (1)