SAXSdb — 9q03

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

B-cell lymphoma 6 protein

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） ZINC ION × 1 ;(3R)-3-(6-{4-[(5-chloro-4-{[3-(3-hydroxy-3-methylbutyl)-1-methyl-2-oxo-2,3-dihydro-1H-1,3-benzimidazol-5-yl]amino}pyrimidin-2-yl)(methyl)amino]piperidin-1-yl}-1-methyl-1H-indazol-3-yl)piperidine-2,6-dione ; × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	BCL6_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 19–143； UniProt 5–129 Author chain B； PDBConstruct 19–143； UniProt 5–129

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	B-cell lymphoma 6 protein × 2 （P41182） ZINC ION × 1 ;(3R)-3-(6-{4-[(5-chloro-4-{[3-(3-hydroxy-3-methylbutyl)-1-methyl-2-oxo-2,3-dihydro-1H-1,3-benzimidazol-5-yl]amino}pyrimidin-2-yl)(methyl)amino]piperidin-1-yl}-1-methyl-1H-indazol-3-yl)piperidine-2,6-dione ; × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CRBN_HUMAN
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain C； PDBConstruct 26–467； UniProt 1–442

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	9q03
Deposition date deposition_date	2025-08-12
Structure title title	Cryo-EM structure of ternary complex BCL6-CRBN-DDB1 with BCL6-760 (LDD, local refined)
Keywords keywords	Cereblon, BCL6, LDD, degrader, E3, LIGASE; LIGASE
Experimental Method method	ELECTRON MICROSCOPY

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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.

9q03__assembly_1__model_1

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

Download this curve (.dat)

9q03__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

9q03__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	28.84 Å
Rg (electron density)	28.25 Å
Total Rg	29.02 Å
Atom count	9452
Residues	578
Excluded volume	84233 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`9q03__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	B-cell lymphoma 6 protein
Molecular weight formula_weight	16431.9 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	9452

GSLDYKDDDDKENLYFQGADSCIQFTRHASDVLLNLNRLRSRDILTDVVIVVSREQFRAHKTVLMACSGLFYSIFTDQLKCNLSVINLDPEINPEGFCILLDFMYTSRLNLREGNIMAVMATAMYLQMEHVVDTCRKFIKASE

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 BL21(DE3)

Entity 2 Entity 2 polymer

Description description	Protein cereblon
Molecular weight formula_weight	53582.0 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

MSYYHHHHHHDYDIPTTGLVPRGSMMAGEGDQQDAAHNMGNHLPLLPAESEEEDEMEVEDQDSKEAKKPNIINFDTSLPTSHTYLGADMEEFHGRTLHDDDSCQVIPVLPQVMMILIPGQTLPLQLFHPQEVSMVRNLIQKDRTFAVLAYSNVQEREAQFGTTAEIYAYREEQDFGIEIVKVKAIGRQRFKVLELRTQSDGIQQAKVQILPECVLPSTMSAVQLESLNKCQIFPSKPVSREDQCSYKWWQKYQKRKFHCANLTSWPRWLYSLYDAETLMDRIKKQLREWDENLKDDSLPSNPIDFSYRVAACLPIDDVLRIQLLKIGSAIQRLRCELDIMNKCTSLCCKQCQETEITTKNEIFSLSLCGPMAAYVNPHGYVHETLTVYKACNLNLIGRPSTEHSWFPGYAWTVAQCKICASHIGWKFTATKKDMSPQKFWGLTRSALLPTIPDTEDEISPDKVILCL

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Spodoptera frugiperda

Entity 3 Entity 3 non-polymer

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

Entity 4 Entity 4 non-polymer

Description description	;(3R)-3-(6-{4-[(5-chloro-4-{[3-(3-hydroxy-3-methylbutyl)-1-methyl-2-oxo-2,3-dihydro-1H-1,3-benzimidazol-5-yl]amino}pyrimidin-2-yl)(methyl)amino]piperidin-1-yl}-1-methyl-1H-indazol-3-yl)piperidine-2,6-dione ;
Molecular weight formula_weight	715.2 kDa
Source method src_method	syn
Copy count entity_count	1

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Unit-cell length a length_a	1.000 Å
Unit-cell length b length_b	1.000 Å
Unit-cell length c length_c	1.000 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	—

Space group space_group	P 1
Space-group number int_tables_number	1
Crystal system crystal_system	—

Resolution resolution	3.150 Å
Low-resolution limit resolution_low	— Å
R factor r_factor	—
R_work r_work	—
R_free r_free	—

Resolution resolution	3.15 Å
Resolution测定Method resolution_method	—
颗粒数 num_particles	112568

Cryo-EM structure of ternary complex BCL6-CRBN-DDB1 with BCL6-760 (LDD, local refined)

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

B-cell lymphoma 6 protein

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

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

9q03__assembly_1__model_1

9q03__assembly_1__model_1 | I(q)

9q03__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

冷冻电镜 EM 3D

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 non-polymer

Entity 4 Entity 4 non-polymer

7. Citations (1)

Cryo-EM structure of ternary complex BCL6-CRBN-DDB1 with BCL6-760 (LDD, local refined)

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

B-cell lymphoma 6 protein

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

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

9q03__assembly_1__model_1

9q03__assembly_1__model_1 | I(q)

9q03__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

冷冻电镜 EM 3D

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 non-polymer

Entity 4 Entity 4 non-polymer

7. Citations (1)