SAXSdb — 6bn8

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

DNA damage-binding protein 1,DNA damage-binding protein 1

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	Protein cereblon × 1 （Q96SW2） Bromodomain-containing protein 4 × 1 （O60885） ZINC ION × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	DDB1_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 29–423； UniProt 1–395 Author chain A； PDBConstruct 430–864； UniProt 706–1140

Protein cereblon

Homo sapiens

UniProt Q96SW2

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	DNA damage-binding protein 1,DNA damage-binding protein 1 × 1 （Q16531） Bromodomain-containing protein 4 × 1 （O60885） ZINC ION × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CRBN_HUMAN
Isoform	Q96SW2-2
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 23–463； UniProt 1–441

Bromodomain-containing protein 4

Homo sapiens

UniProt O60885

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	DNA damage-binding protein 1,DNA damage-binding protein 1 × 1 （Q16531） Protein cereblon × 1 （Q96SW2） ZINC ION × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	BRD4_HUMAN
Isoform	O60885-3
PDB entities	3
Chains and sequence ranges	Author chain C； PDBConstruct 1–127； UniProt 42–168

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	6bn8
Deposition date deposition_date	2017-11-16
Structure title title	Crystal structure of DDB1-CRBN-BRD4(BD1) complex bound to dBET55 PROTAC.
Keywords keywords	PROTAC, degrader, E3 ligase, CRBN, LIGASE; LIGASE
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.

6bn8__assembly_1__model_1

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

Download this curve (.dat)

6bn8__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

6bn8__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	38.44 Å
Rg (electron density)	38.26 Å
Total Rg	38.55 Å
Atom count	10291
Residues	1308
Excluded volume	183750 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`6bn8__assembly_1__model_1`	trimeric （3）	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	DNA damage-binding protein 1,DNA damage-binding protein 1
Molecular weight formula_weight	96425.6 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	10291

MGSSHHHHHHSAAHIVMVDAYKPTKGGRMSYNYVVTAQKPTAVNGCVTGHFTSAEDLNLLIAKNTRLEIYVVTAEGLRPVKEVGMYGKIAVMELFRPKGESKDLLFILTAKYNACILEYKQSGESIDIITRAHGNVQDRIGRPSETGIIGIIDPECRMIGLRLYDGLFKVIPLDRDNKELKAFNIRLEELHVIDVKFLYGCQAPTICFVYQDPQGRHVKTYEVSLREKEFNKGPWKQENVEAEASMVIAVPEPFGGAIIIGQESITYHNGDKYLAIAPPIIKQSTIVCHNRVDPNGSRYLLGDMEGRLFMLLLEKEEQMDGTVTLKDLRVELLGETSIAECLTYLDNGVVFVGSRLGDSQLVKLNVDSNEQGSYVVAMETFTNLGPIVDMCVVDLERQGQGQLVTCSGAFKEGSLRIIRNGIGGNGNSGEIQKLHIRTVPLYESPRKICYQEVSQCFGVLSSRIEVQDTSGGTTALRPSASTQALSSSVSSSKLFSSSTAPHETSFGEEVEVHNLLIIDQHTFEVLHAHQFLQNEYALSLVSCKLGKDPNTYFIVGTAMVYPEEAEPKQGRIVVFQYSDGKLQTVAEKEVKGAVYSMVEFNGKLLASINSTVRLYEWTTEKELRTECNHYNNIMALYLKTKGDFILVGDLMRSVLLLAYKPMEGNFEEIARDFNPNWMSAVEILDDDNFLGAENAFNLFVCQKDSAATTDEERQHLQEVGLFHLGEFVNVFCHGSLVMQNLGETSTPTQGSVLFGTVNGMIGLVTSLSESWYNLLLDMQNRLNKVIKSVGKIEHSFWRSFHTERKTEPATGFIDGDLIESFLDISRPKMQEVVANLQYDDGSGMKREATADDLIKVVEELTRIH

Source Source

Source organism organism	Homo sapiens
Common name common_name	Human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Trichoplusia ni

Entity 2 Entity 2 polymer

Description description	Protein cereblon
Molecular weight formula_weight	53005.2 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

MGSSHHHHHHSAVDENLYFQGGMAGEGDQQDAAHNMGNHLPLLPESEEEDEMEVEDQDSKEAKKPNIINFDTSLPTSHTYLGADMEEFHGRTLHDDDSCQVIPVLPQVMMILIPGQTLPLQLFHPQEVSMVRNLIQKDRTFAVLAYSNVQEREAQFGTTAEIYAYREEQDFGIEIVKVKAIGRQRFKVLELRTQSDGIQQAKVQILPECVLPSTMSAVQLESLNKCQIFPSKPVSREDQCSYKWWQKYQKRKFHCANLTSWPRWLYSLYDAETLMDRIKKQLREWDENLKDDSLPSNPIDFSYRVAACLPIDDVLRIQLLKIGSAIQRLRCELDIMNKCTSLCCKQCQETEITTKNEIFSLSLCGPMAAYVNPHGYVHETLTVYKACNLNLIGRPSTEHSWFPGYAWTVAQCKICASHIGWKFTATKKDMSPQKFWGLTRSALLPTIPDTEDEISPDKVILCL

Source Source

Source organism organism	Homo sapiens
Common name common_name	Human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Trichoplusia ni

Entity 3 Entity 3 polymer

Description description	Bromodomain-containing protein 4
Molecular weight formula_weight	15055.4 kDa
Mutation mutation	T43M, D145A
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

SMNPPPPETSNPNKPKRQTNQLQYLLRVVLKTLWKHQFAWPFQQPVDAVKLNLPDYYKIIKTPMDMGTIKKRLENNYYWNAQECIQDFNTMFTNCYIYNKPGDAIVLMAEALEKLFLQKINELPTEE

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 4 Entity 4 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	1

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6. Fold Classification (SCOP + CATH) 7 domains

CATH v4.4 (7 domains)

Domain ID domain_id	6bn8A01
Class class	2 — Mainly Beta
Architecture architecture	130 — 7 Propeller
Topology topology	10 — Methylamine Dehydrogenase; Chain H
Homologous superfamily homologous superfamily	10 — YVTN repeat-like/Quinoprotein amine dehydrogenase

Domain ID domain_id	6bn8A02
Class class	2 — Mainly Beta
Architecture architecture	130 — 7 Propeller
Topology topology	10 — Methylamine Dehydrogenase; Chain H
Homologous superfamily homologous superfamily	10 — YVTN repeat-like/Quinoprotein amine dehydrogenase

Domain ID domain_id	6bn8A03
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	150 — DNA polymerase; domain 1
Homologous superfamily homologous superfamily	910 —

Domain ID domain_id	6bn8B01
Class class	2 — Mainly Beta
Architecture architecture	170 — Beta Complex
Topology topology	150 — Metal Binding Protein, Guanine Nucleotide Exchange Factor; Chain A
Homologous superfamily homologous superfamily	20 — Peptide methionine sulfoxide reductase.

Domain ID domain_id	6bn8B02
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	130 — Archaeosine Trna-guanine Transglycosylase; Chain: A, domain 4
Homologous superfamily homologous superfamily	40 — LON domain-like

Domain ID domain_id	6bn8B03
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	58 — Methane Monooxygenase Hydroxylase; Chain G, domain 1
Homologous superfamily homologous superfamily	1480 —

Domain ID domain_id	6bn8C01
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	115.204 Å
Unit-cell length b length_b	115.204 Å
Unit-cell length c length_c	597.135 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	12

Space group space_group	P 65 2 2
Space-group number int_tables_number	179
Crystal system crystal_system	—

Resolution resolution	3.990 Å
Low-resolution limit resolution_low	99.770 Å
R factor r_factor	0.2908
R_work r_work	0.2886
R_free r_free	0.3334

Crystal structure of DDB1-CRBN-BRD4(BD1) complex bound to dBET55 PROTAC.

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

DNA damage-binding protein 1,DNA damage-binding protein 1

State in the Current Structure

Other States of the Same Protein in the Database

Protein cereblon

State in the Current Structure

Other States of the Same Protein in the Database

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

6bn8__assembly_1__model_1

6bn8__assembly_1__model_1 | I(q)

6bn8__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 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

Entity 4 Entity 4 non-polymer

6. Fold Classification (SCOP + CATH) 7 domains

CATH v4.4 (7 domains)

7. Citations (1)

Crystal structure of DDB1-CRBN-BRD4(BD1) complex bound to dBET55 PROTAC.

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

DNA damage-binding protein 1,DNA damage-binding protein 1

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Protein cereblon

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

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

6bn8__assembly_1__model_1

6bn8__assembly_1__model_1 | I(q)

6bn8__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 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

Entity 4 Entity 4 non-polymer

6. Fold Classification (SCOP + CATH) 7 domains

CATH v4.4 (7 domains)

7. Citations (1)