SAXSdb — 3htm

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

Speckle-type POZ protein

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SPOP_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 7–164； UniProt 172–329 Author chain B； PDBConstruct 7–164； UniProt 172–329 Author chain C； PDBConstruct 7–164； UniProt 172–329 Author chain D； PDBConstruct 7–164； UniProt 172–329

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	3htm
Deposition date deposition_date	2009-06-11
Structure title title	Structures of SPOP-Substrate Complexes: Insights into Molecular Architectures of BTB-Cul3 Ubiquitin Ligases: SPOPBTB/3-box
Keywords keywords	BTB, SPOP, ubiquitin, ligase, Nucleus, Ubl conjugation pathway, PROTEIN BINDING; PROTEIN BINDING, 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.

3htm__assembly_1__model_1

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

Download this curve (.dat)

3htm__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3htm__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	24.20 Å
Rg (electron density)	23.74 Å
Total Rg	24.21 Å
Atom count	2382
Residues	292
Excluded volume	42567 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3htm__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3htm__assembly_2__model_1`	dimeric （2）	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 (2)

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6. Fold Classification (SCOP + CATH) 8 domains

CATH v4.4 (8 domains)

Domain ID domain_id	3htmA01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	710 — Potassium Channel Kv1.1; Chain A
Homologous superfamily homologous superfamily	10 — Potassium Channel Kv1.1; Chain A

Domain ID domain_id	3htmA02
Class class	6 — Special
Architecture architecture	10 — Helix non-globular
Topology topology	250 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	3030 —

Domain ID domain_id	3htmB01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	710 — Potassium Channel Kv1.1; Chain A
Homologous superfamily homologous superfamily	10 — Potassium Channel Kv1.1; Chain A

Domain ID domain_id	3htmB02
Class class	6 — Special
Architecture architecture	10 — Helix non-globular
Topology topology	250 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	3030 —

Domain ID domain_id	3htmC01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	710 — Potassium Channel Kv1.1; Chain A
Homologous superfamily homologous superfamily	10 — Potassium Channel Kv1.1; Chain A

Domain ID domain_id	3htmC02
Class class	6 — Special
Architecture architecture	10 — Helix non-globular
Topology topology	250 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	3030 —

Domain ID domain_id	3htmD01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	710 — Potassium Channel Kv1.1; Chain A
Homologous superfamily homologous superfamily	10 — Potassium Channel Kv1.1; Chain A

Domain ID domain_id	3htmD02
Class class	6 — Special
Architecture architecture	10 — Helix non-globular
Topology topology	250 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	3030 —

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Unit-cell length a length_a	36.800 Å
Unit-cell length b length_b	88.700 Å
Unit-cell length c length_c	88.700 Å
Unit-cell angle α angle_alpha	90.80 °
Unit-cell angle β angle_beta	89.30 °
Unit-cell angle γ angle_gamma	89.90 °
Molecules per unit cell Z z_pdb	4

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

Resolution resolution	2.500 Å
Low-resolution limit resolution_low	44.340 Å
R factor r_factor	0.2170
R_work r_work	0.2170
R_free r_free	0.2560

Description description	Speckle-type POZ protein
Molecular weight formula_weight	19295.6 kDa
Source method src_method	man
Copy count entity_count	4

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	5092

Structures of SPOP-Substrate Complexes: Insights into Molecular Architectures of BTB-Cul3 Ubiquitin Ligases: SPOPBTB/3-box

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

Speckle-type POZ protein

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

3htm__assembly_1__model_1

3htm__assembly_1__model_1 | I(q)

3htm__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 8 domains

CATH v4.4 (8 domains)

7. Citations (1)

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	336

Structures of SPOP-Substrate Complexes: Insights into Molecular Architectures of BTB-Cul3 Ubiquitin Ligases: SPOPBTB/3-box

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

Speckle-type POZ 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

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

3htm__assembly_1__model_1

3htm__assembly_1__model_1 | I(q)

3htm__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 8 domains

CATH v4.4 (8 domains)

7. Citations (1)