SAXSdb — 2co5

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

VIRAL PROTEIN F93

SULFOLOBUS TURRETED ICOSAHEDRAL VIRUS

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

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q6Q0J9_9VIRU
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–93； UniProt 1–93 Author chain B； PDBConstruct 1–93； UniProt 1–93

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	2co5
Deposition date deposition_date	2006-05-25
Structure title title	F93 FROM STIV, a winged-helix DNA-binding protein
Keywords keywords	;VIRAL PROTEIN-WINGED HELIX COMPLEX, WINGED HELIX, DNA-BINDING, HTH, WHTH, F93, DISULFIDE BOND, STIV, SULFOLOBUS TURRETED ICOSAHEDRAL VIRUS, VIRAL PROTEIN, VIRUS, ARCHAEA, CRENARCHAEA, ARCHAEAL VIRUS, CRENARCHAEAL VIRUS, THERMOPHILIC PROTEIN, THERMOPHILIC VIRUS, SULFOLOBUS, YELLOWSTONE ;; VIRAL PROTEIN/WINGED HELIX
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.

2co5__assembly_1__model_1

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

Download this curve (.dat)

2co5__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2co5__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	20.13 Å
Rg (electron density)	18.81 Å
Total Rg	19.73 Å
Atom count	1570
Residues	186
Excluded volume	28653 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2co5__assembly_1__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) 6 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d2co5a1
Class class	a — All alpha proteins
Fold Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamily	a.4.5 — 'Winged helix' DNA-binding domain
Family Family family	a.4.5.48 — F93-like

Domain ID domain_id	d2co5a2
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	d2co5b2
Class class	a — All alpha proteins
Fold Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamily	a.4.5 — 'Winged helix' DNA-binding domain
Family Family family	a.4.5.48 — F93-like

Domain ID domain_id	d2co5b3
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

CATH v4.4 (2 domains)

Domain ID domain_id	2co5A00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain

Domain ID domain_id	2co5B00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain

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Unit-cell length a length_a	42.050 Å
Unit-cell length b length_b	102.594 Å
Unit-cell length c length_c	92.398 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	16

Space group space_group	C 2 2 21
Space-group number int_tables_number	20
Crystal system crystal_system	—

Resolution resolution	2.200 Å
Low-resolution limit resolution_low	46.370 Å
R factor r_factor	0.1920
R_work r_work	0.1900
R_free r_free	0.2320

Description description	VIRAL PROTEIN F93
Molecular weight formula_weight	12000.2 kDa
Source method src_method	man
Copy count entity_count	2

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	1667

F93 FROM STIV, a winged-helix DNA-binding protein

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

VIRAL PROTEIN F93

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

2co5__assembly_1__model_1

2co5__assembly_1__model_1 | I(q)

2co5__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (4 domains)

CATH v4.4 (2 domains)

7. Citations (2)

Source organism organism	SULFOLOBUS TURRETED ICOSAHEDRAL VIRUS
Common name common_name	STIV
NCBI taxonomy ID ncbi_taxonomy_id	269145
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	69

F93 FROM STIV, a winged-helix DNA-binding protein

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

VIRAL PROTEIN F93

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

2co5__assembly_1__model_1

2co5__assembly_1__model_1 | I(q)

2co5__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (4 domains)

CATH v4.4 (2 domains)

7. Citations (2)