SAXSdb — 1ifp

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

MAJOR COAT PROTEIN ASSEMBLY

Pseudomonas phage Pf3

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 35	No other associated polymer	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count
3	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	COAT1_BPPF3
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–44； UniProt 1–44

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	1ifp
Deposition date deposition_date	1998-01-22
Structure title title	INOVIRUS (FILAMENTOUS BACTERIOPHAGE) STRAIN PF3 MAJOR COAT PROTEIN ASSEMBLY
Keywords keywords	VIRUS COAT PROTEIN, Helical virus, 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.

1ifp__assembly_1__model_1

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

Download this curve (.dat)

1ifp__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1ifp__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	41.99 Å
Rg (electron density)	41.63 Å
Total Rg	42.00 Å
Atom count	11410
Residues	1540
Excluded volume	210380 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1ifp__assembly_1__model_1`	helical （35）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1ifp__assembly_2__model_1`	monomeric （1）	Excluded	—	—
	Exclusion reason： Auxiliary symmetry representation; not a complete or representative biological assembly.
3	1	`1ifp__assembly_3__model_1`	monomeric （1）	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) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_id	d1ifpa_
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 (1 domains)

Domain ID domain_id	1ifpA00
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	440 — ATP synthase delta/epsilon subunit, C-terminal domain

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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	1

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	12.000 Å
R factor r_factor	0.1700
R_work r_work	0.1700
R_free r_free	0.3900

Description description	MAJOR COAT PROTEIN ASSEMBLY
Molecular weight formula_weight	4632.5 kDa
Source method src_method	man
Copy count entity_count	1

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	326

INOVIRUS (FILAMENTOUS BACTERIOPHAGE) STRAIN PF3 MAJOR COAT PROTEIN ASSEMBLY

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

MAJOR COAT PROTEIN ASSEMBLY

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

1ifp__assembly_1__model_1

1ifp__assembly_1__model_1 | I(q)

1ifp__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) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (6)

Source organism organism	Pseudomonas phage Pf3
NCBI taxonomy ID ncbi_taxonomy_id	10872
Host organism host_organism	Pseudomonas aeruginosa

INOVIRUS (FILAMENTOUS BACTERIOPHAGE) STRAIN PF3 MAJOR COAT PROTEIN ASSEMBLY

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

MAJOR COAT PROTEIN ASSEMBLY

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

1ifp__assembly_1__model_1

1ifp__assembly_1__model_1 | I(q)

1ifp__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) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (6)