SAXSdb — 2izv

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

SUPPRESSOR OF CYTOKINE SIGNALING 4

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	TRANSCRIPTION ELONGATION FACTOR B POLYPEPTIDE 2 × 1 （Q15370） TRANSCRIPTION ELONGATION FACTOR B POLYPEPTIDE 1 × 1 （Q15369） SODIUM ION × 1 1,2-ETHANEDIOL × 1 CHLORIDE ION × 1 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SOCS4_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 24–187； UniProt 274–437

TRANSCRIPTION ELONGATION FACTOR B POLYPEPTIDE 2

HOMO SAPIENS

UniProt Q15370

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	SUPPRESSOR OF CYTOKINE SIGNALING 4 × 1 （Q8WXH5） TRANSCRIPTION ELONGATION FACTOR B POLYPEPTIDE 1 × 1 （Q15369） SODIUM ION × 1 1,2-ETHANEDIOL × 1 CHLORIDE ION × 1 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ELOB_HUMAN
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–118； UniProt 1–118

TRANSCRIPTION ELONGATION FACTOR B POLYPEPTIDE 1

HOMO SAPIENS

UniProt Q15369

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	SUPPRESSOR OF CYTOKINE SIGNALING 4 × 1 （Q8WXH5） TRANSCRIPTION ELONGATION FACTOR B POLYPEPTIDE 2 × 1 （Q15370） SODIUM ION × 1 1,2-ETHANEDIOL × 1 CHLORIDE ION × 1 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ELOC_HUMAN
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain C； PDBConstruct 2–97； UniProt 17–112

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	2izv
Deposition date deposition_date	2006-07-26
Structure title title	CRYSTAL STRUCTURE OF SOCS-4 IN COMPLEX WITH ELONGIN-B AND ELONGIN-C AT 2.55A RESOLUTION
Keywords keywords	;SIGNAL TRANSDUCTION INHIBITOR, GROWTH REGULATION, SIGNAL TRANSDUCTION, SH2 DOMAIN, TRANSCRIPTION, NUCLEAR PROTEIN, UBL CONJUGATION PATHWAY, TRANSCRIPTION REGULATION ;; 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.

2izv__assembly_1__model_1

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

Download this curve (.dat)

2izv__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2izv__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	25.10 Å
Rg (electron density)	24.24 Å
Total Rg	24.91 Å
Atom count	2812
Residues	353
Excluded volume	50425 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2izv__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 (7)

Entity 1 Entity 1 polymer

Description description	SUPPRESSOR OF CYTOKINE SIGNALING 4
Molecular weight formula_weight	21736.7 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	2925

MHHHHHHSSGVDLGTENLYFQSMLVPDLLQINNNPCYWGVMDKYAAEALLEGKPEGTFLLRDSAQEDYLFSVSFRRYSRSLHARIEQWNHNFSFDAHDPCVFHSPDITGLLEHYKDPSACMFFEPLLSTPLIRTFPFSLQHICRTVICNCTTYDGIDALPIPSSMKLYLKEYHYKSKVRVLRIDAPE

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	TRANSCRIPTION ELONGATION FACTOR B POLYPEPTIDE 2
Molecular weight formula_weight	13147.8 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

MDVFLMIRRHKTTIFTDAKESSTVFELKRIVEGILKRPPDEQRLYKDDQLLDDGKTLGECGFTSQTARPQAPATVGLAFRADDTFEALCIEPFSSPPELPDVMKPQDSGSSANEQAVQ

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 3 Entity 3 polymer

Description description	TRANSCRIPTION ELONGATION FACTOR B POLYPEPTIDE 1
Molecular weight formula_weight	10974.6 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

MMYVKLISSDGHEFIVKREHALTSGTIKAMLSGPGQFAENETNEVNFREIPSHVLSKVCMYFTYKVRYTNSSTEIPEFPIAPEIALELLMAANFLDC

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 4 Entity 4 non-polymer

Description description	SODIUM ION
Molecular weight formula_weight	23.0 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 5 Entity 5 non-polymer

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

Entity 6 Entity 6 non-polymer

Description description	CHLORIDE ION
Molecular weight formula_weight	35.5 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 7 Entity 7 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	113

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6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (5 domains)

Domain ID domain_id	d2izva1
Class class	a — All alpha proteins
Fold Fold fold	a.271 — SOCS box-like
Superfamily Superfamily superfamily	a.271.1 — SOCS box-like
Family Family family	a.271.1.1 — SOCS box-like

Domain ID domain_id	d2izva2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.93 — SH2-like
Superfamily Superfamily superfamily	d.93.1 — SH2 domain
Family Family family	d.93.1.1 — SH2 domain

Domain ID domain_id	d2izva3
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

Domain ID domain_id	d2izvb_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.15 — beta-Grasp (ubiquitin-like)
Superfamily Superfamily superfamily	d.15.1 — Ubiquitin-like
Family Family family	d.15.1.1 — Ubiquitin-related

Domain ID domain_id	d2izvc_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.42 — POZ domain
Superfamily Superfamily superfamily	d.42.1 — POZ domain
Family Family family	d.42.1.1 — BTB/POZ domain

CATH v4.4 (3 domains)

Domain ID domain_id	2izvA00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	505 — SHC Adaptor Protein
Homologous superfamily homologous superfamily	10 — SH2 domain

Domain ID domain_id	2izvB00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily	90 — Phosphatidylinositol 3-kinase Catalytic Subunit; Chain A, domain 1

Domain ID domain_id	2izvC00
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

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Unit-cell length a length_a	154.770 Å
Unit-cell length b length_b	154.770 Å
Unit-cell length c length_c	67.909 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	9

Space group space_group	H 3
Space-group number int_tables_number	146
Crystal system crystal_system	—

Resolution resolution	2.550 Å
Low-resolution limit resolution_low	77.380 Å
R factor r_factor	0.1750
R_work r_work	0.1720
R_free r_free	0.2230

CRYSTAL STRUCTURE OF SOCS-4 IN COMPLEX WITH ELONGIN-B AND ELONGIN-C AT 2.55A RESOLUTION

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

SUPPRESSOR OF CYTOKINE SIGNALING 4

State in the Current Structure

Other States of the Same Protein in the Database

TRANSCRIPTION ELONGATION FACTOR B POLYPEPTIDE 2

State in the Current Structure

Other States of the Same Protein in the Database

TRANSCRIPTION ELONGATION FACTOR B POLYPEPTIDE 1

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

2izv__assembly_1__model_1

2izv__assembly_1__model_1 | I(q)

2izv__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 (7)

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

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (5 domains)

CATH v4.4 (3 domains)

7. Citations (1)

CRYSTAL STRUCTURE OF SOCS-4 IN COMPLEX WITH ELONGIN-B AND ELONGIN-C AT 2.55A RESOLUTION

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

SUPPRESSOR OF CYTOKINE SIGNALING 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

TRANSCRIPTION ELONGATION FACTOR B POLYPEPTIDE 2

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

TRANSCRIPTION ELONGATION FACTOR B POLYPEPTIDE 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

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

2izv__assembly_1__model_1

2izv__assembly_1__model_1 | I(q)

2izv__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 (7)

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

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (5 domains)

CATH v4.4 (3 domains)

7. Citations (1)