SAXSdb — 1ql2

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

PF1 BACTERIOPHAGE COAT PROTEIN B

PSEUDOMONAS PHAGE PF1

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 39	No other associated polymer	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 3	No other associated polymer	Consistent with protein count
3	Protein homooligomer	Homooligomer	Protein 3	No other associated polymer	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	COAB_BPPF1
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–46； UniProt 37–82 Author chain B； PDBConstruct 1–46； UniProt 37–82 Author chain C； PDBConstruct 1–46； UniProt 37–82

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	1ql2
Deposition date deposition_date	1999-08-20
Structure title title	Inovirus (Filamentous Bacteriophage) Strain PF1 Major Coat Protein Assembly
Keywords keywords	VIRUS, VIRUS COAT PROTEIN, HELICAL VIRUS COAT PROTEIN, SSDNA VIRUSES, INOVIRUS, HELICAL VIRUS; VIRUS
Experimental Method method	FIBER 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.

1ql2__assembly_1__model_1

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

Download this curve (.dat)

1ql2__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1ql2__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	44.67 Å
Rg (electron density)	44.87 Å
Total Rg	44.92 Å
Atom count	12558
Residues	1794
Excluded volume	229660 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1ql2__assembly_1__model_1`	helical （39）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1ql2__assembly_2__model_1`	trimeric （3）	Excluded	—	—
	Exclusion reason： Auxiliary symmetry representation; not a complete or representative biological assembly.
3	1	`1ql2__assembly_3__model_1`	trimeric （3）	Excluded	—	—
	Exclusion reason： Auxiliary symmetry representation; not a complete or representative biological assembly.

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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (1)

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

Domain ID domain_id	d1ql2a_
Class class	h — Coiled coil proteins
Fold Fold fold	h.1 — Parallel coiled-coil
Superfamily Superfamily superfamily	h.1.4 — Inovirus (filamentous phage) major coat protein
Family Family family	h.1.4.1 — Inovirus (filamentous phage) major coat protein

Domain ID domain_id	d1ql2b_
Class class	h — Coiled coil proteins
Fold Fold fold	h.1 — Parallel coiled-coil
Superfamily Superfamily superfamily	h.1.4 — Inovirus (filamentous phage) major coat protein
Family Family family	h.1.4.1 — Inovirus (filamentous phage) major coat protein

Domain ID domain_id	d1ql2c_
Class class	h — Coiled coil proteins
Fold Fold fold	h.1 — Parallel coiled-coil
Superfamily Superfamily superfamily	h.1.4 — Inovirus (filamentous phage) major coat protein
Family Family family	h.1.4.1 — Inovirus (filamentous phage) major coat protein

CATH v4.4 (3 domains)

Domain ID domain_id	1ql2A00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	230 —

Domain ID domain_id	1ql2B00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	230 —

Domain ID domain_id	1ql2C00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	230 —

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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	3

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

Resolution resolution	3.100 Å
Low-resolution limit resolution_low	50.000 Å
R factor r_factor	—
R_work r_work	—
R_free r_free	—

Description description	PF1 BACTERIOPHAGE COAT PROTEIN B
Molecular weight formula_weight	4612.4 kDa
Source method src_method	man
Copy count entity_count	3

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C
Atom count atom_count	966

Inovirus (Filamentous Bacteriophage) Strain PF1 Major Coat Protein Assembly

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

PF1 BACTERIOPHAGE COAT PROTEIN B

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

1ql2__assembly_1__model_1

1ql2__assembly_1__model_1 | I(q)

1ql2__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

7. Citations (5)

Source organism organism	PSEUDOMONAS PHAGE PF1
NCBI taxonomy ID ncbi_taxonomy_id	10871
Host organism host_organism	PSEUDOMONAS AERUGINOSA

Inovirus (Filamentous Bacteriophage) Strain PF1 Major Coat Protein Assembly

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

PF1 BACTERIOPHAGE COAT PROTEIN B

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

1ql2__assembly_1__model_1

1ql2__assembly_1__model_1 | I(q)

1ql2__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

7. Citations (5)