SAXSdb — 9f1n

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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 × 2 SODIUM ION × 3 ;(2S,4R)-1-[(2S)-2-[9-[2-[4-[2-[2-[2-[4-[3-(dimethylamino)propoxy]phenyl]ethyl]-5-(3,5-dimethyl-1,2-oxazol-4-yl)benzimidazol-1-yl]ethyl]piperazin-1-yl]ethanoylamino]nonanoylamino]-3,3-dimethyl-butanoyl]-N-[[4-(4-methyl-4H-1,3-thiazol-5-yl)phenyl]methyl]-4-oxidanyl-pyrrolidine-2-carboxamide ; × 1 water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	1,2-ETHANEDIOL × 1 ;(2S,4R)-1-[(2S)-2-[9-[2-[4-[2-[2-[2-[4-[3-(dimethylamino)propoxy]phenyl]ethyl]-5-(3,5-dimethyl-1,2-oxazol-4-yl)benzimidazol-1-yl]ethyl]piperazin-1-yl]ethanoylamino]nonanoylamino]-3,3-dimethyl-butanoyl]-N-[[4-(4-methyl-4H-1,3-thiazol-5-yl)phenyl]methyl]-4-oxidanyl-pyrrolidine-2-carboxamide ; × 1 water × 1	Consistent with protein count
3	Protein monomer	Monomer	Protein 1	SODIUM ION × 1 ;(2S,4R)-1-[(2S)-2-[9-[2-[4-[2-[2-[2-[4-[3-(dimethylamino)propoxy]phenyl]ethyl]-5-(3,5-dimethyl-1,2-oxazol-4-yl)benzimidazol-1-yl]ethyl]piperazin-1-yl]ethanoylamino]nonanoylamino]-3,3-dimethyl-butanoyl]-N-[[4-(4-methyl-4H-1,3-thiazol-5-yl)phenyl]methyl]-4-oxidanyl-pyrrolidine-2-carboxamide ; × 1 water × 1	Consistent with protein count
4	Protein monomer	Monomer	Protein 1	1,2-ETHANEDIOL × 1 ;(2S,4R)-1-[(2S)-2-[9-[2-[4-[2-[2-[2-[4-[3-(dimethylamino)propoxy]phenyl]ethyl]-5-(3,5-dimethyl-1,2-oxazol-4-yl)benzimidazol-1-yl]ethyl]piperazin-1-yl]ethanoylamino]nonanoylamino]-3,3-dimethyl-butanoyl]-N-[[4-(4-methyl-4H-1,3-thiazol-5-yl)phenyl]methyl]-4-oxidanyl-pyrrolidine-2-carboxamide ; × 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 Author chain B； PDBConstruct 3–127； UniProt 44–168 Author chain C； PDBConstruct 3–127； UniProt 44–168 Author chain D； 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	9f1n
Deposition date deposition_date	2024-04-19
Structure title title	First bromodomain of BRD4 in complex with ISOX-DUAL based degrader 46
Keywords keywords	Bromodomain, epigenetic drugs, inhibitor, PROTACs, VHL, GENE REGULATION; GENE REGULATION
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.

9f1n__assembly_3__model_1

Assembly 3 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

9f1n__assembly_3__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

9f1n__assembly_3__model_1 | P(r) · Pending

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

Rg（Guinier）	15.93 Å
Rg (electron density)	14.91 Å
Total Rg	16.05 Å
Atom count	1088
Residues	124
Excluded volume	19711 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`9f1n__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`9f1n__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`9f1n__assembly_3__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`9f1n__assembly_4__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 (5)

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	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	4678

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	4

Entity 3 Entity 3 non-polymer

Description description	SODIUM ION
Molecular weight formula_weight	23.0 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 4 Entity 4 non-polymer

Description description	;(2S,4R)-1-[(2S)-2-[9-[2-[4-[2-[2-[2-[4-[3-(dimethylamino)propoxy]phenyl]ethyl]-5-(3,5-dimethyl-1,2-oxazol-4-yl)benzimidazol-1-yl]ethyl]piperazin-1-yl]ethanoylamino]nonanoylamino]-3,3-dimethyl-butanoyl]-N-[[4-(4-methyl-4H-1,3-thiazol-5-yl)phenyl]methyl]-4-oxidanyl-pyrrolidine-2-carboxamide ;
Molecular weight formula_weight	1158.5 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	360

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Unit-cell length a length_a	71.913 Å
Unit-cell length b length_b	48.912 Å
Unit-cell length c length_c	73.043 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	109.12 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	monoclinic

Resolution resolution	1.710 Å
Low-resolution limit resolution_low	42.023 Å
R factor r_factor	0.1961
R_work r_work	0.1941
R_free r_free	0.2321

First bromodomain of BRD4 in complex with ISOX-DUAL based degrader 46

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

9f1n__assembly_3__model_1

9f1n__assembly_3__model_1 | I(q)

9f1n__assembly_3__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 (5)

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 non-polymer

Entity 5 Entity 5 water

7. Citations (1)

First bromodomain of BRD4 in complex with ISOX-DUAL based degrader 46

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

9f1n__assembly_3__model_1

9f1n__assembly_3__model_1 | I(q)

9f1n__assembly_3__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 (5)

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 non-polymer

Entity 5 Entity 5 water

7. Citations (1)