1fou

CONNECTOR PROTEIN FROM BACTERIOPHAGE PHI29

Method: X-RAY DIFFRACTION

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

UPPER COLLAR PROTEIN

Bacillus phage phi29

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 12	No other associated polymer	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	VG10_BPPH2
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–309； UniProt 1–309 Author chain B； PDBConstruct 1–309； UniProt 1–309 Author chain C； PDBConstruct 1–309； UniProt 1–309 Author chain D； PDBConstruct 1–309； UniProt 1–309 Author chain E； PDBConstruct 1–309； UniProt 1–309 Author chain F； PDBConstruct 1–309； UniProt 1–309 Author chain G； PDBConstruct 1–309； UniProt 1–309 Author chain H； PDBConstruct 1–309； UniProt 1–309 Author chain I； PDBConstruct 1–309； UniProt 1–309 Author chain J； PDBConstruct 1–309； UniProt 1–309 Author chain K； PDBConstruct 1–309； UniProt 1–309 Author chain L； PDBConstruct 1–309； UniProt 1–309

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	1fou
Deposition date deposition_date	2000-08-28
Structure title title	CONNECTOR PROTEIN FROM BACTERIOPHAGE PHI29
Keywords keywords	alpha-helical barrel, Viral protein; VIRAL PROTEIN
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.

1fou__assembly_1__model_1

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

Download this curve (.dat)

1fou__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1fou__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	51.19 Å
Rg (electron density)	50.59 Å
Total Rg	50.87 Å
Atom count	25272
Residues	3084
Excluded volume	449650 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1fou__assembly_1__model_1`	dodecameric （12）	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 (1)

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6. Fold Classification (SCOP + CATH) 48 domains

SCOP 2.08 (12 domains)

Domain ID domain_id	d1foua_
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.27 — Upper collar protein gp10 (connector protein)
Superfamily Superfamily superfamily	e.27.1 — Upper collar protein gp10 (connector protein)
Family Family family	e.27.1.1 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	d1foub_
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.27 — Upper collar protein gp10 (connector protein)
Superfamily Superfamily superfamily	e.27.1 — Upper collar protein gp10 (connector protein)
Family Family family	e.27.1.1 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	d1fouc_
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.27 — Upper collar protein gp10 (connector protein)
Superfamily Superfamily superfamily	e.27.1 — Upper collar protein gp10 (connector protein)
Family Family family	e.27.1.1 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	d1foud_
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.27 — Upper collar protein gp10 (connector protein)
Superfamily Superfamily superfamily	e.27.1 — Upper collar protein gp10 (connector protein)
Family Family family	e.27.1.1 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	d1foue_
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.27 — Upper collar protein gp10 (connector protein)
Superfamily Superfamily superfamily	e.27.1 — Upper collar protein gp10 (connector protein)
Family Family family	e.27.1.1 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	d1fouf_
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.27 — Upper collar protein gp10 (connector protein)
Superfamily Superfamily superfamily	e.27.1 — Upper collar protein gp10 (connector protein)
Family Family family	e.27.1.1 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	d1foug_
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.27 — Upper collar protein gp10 (connector protein)
Superfamily Superfamily superfamily	e.27.1 — Upper collar protein gp10 (connector protein)
Family Family family	e.27.1.1 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	d1fouh_
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.27 — Upper collar protein gp10 (connector protein)
Superfamily Superfamily superfamily	e.27.1 — Upper collar protein gp10 (connector protein)
Family Family family	e.27.1.1 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	d1foui_
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.27 — Upper collar protein gp10 (connector protein)
Superfamily Superfamily superfamily	e.27.1 — Upper collar protein gp10 (connector protein)
Family Family family	e.27.1.1 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	d1fouj_
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.27 — Upper collar protein gp10 (connector protein)
Superfamily Superfamily superfamily	e.27.1 — Upper collar protein gp10 (connector protein)
Family Family family	e.27.1.1 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	d1fouk_
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.27 — Upper collar protein gp10 (connector protein)
Superfamily Superfamily superfamily	e.27.1 — Upper collar protein gp10 (connector protein)
Family Family family	e.27.1.1 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	d1foul_
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.27 — Upper collar protein gp10 (connector protein)
Superfamily Superfamily superfamily	e.27.1 — Upper collar protein gp10 (connector protein)
Family Family family	e.27.1.1 — Upper collar protein gp10 (connector protein)

CATH v4.4 (36 domains)

Domain ID domain_id	1fouA01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	246 — Serum Albumin; Chain A, Domain 1
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1fouA02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	500 — Upper collar protein gp10 (connector protein) fold
Homologous superfamily homologous superfamily	10 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	1fouA03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1350 — Crambin
Homologous superfamily homologous superfamily	20 — Bacteriophage PHI-29 conector. Domain 3

Domain ID domain_id	1fouB01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	246 — Serum Albumin; Chain A, Domain 1
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1fouB02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	500 — Upper collar protein gp10 (connector protein) fold
Homologous superfamily homologous superfamily	10 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	1fouB03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1350 — Crambin
Homologous superfamily homologous superfamily	20 — Bacteriophage PHI-29 conector. Domain 3

Domain ID domain_id	1fouC01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	246 — Serum Albumin; Chain A, Domain 1
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1fouC02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	500 — Upper collar protein gp10 (connector protein) fold
Homologous superfamily homologous superfamily	10 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	1fouC03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1350 — Crambin
Homologous superfamily homologous superfamily	20 — Bacteriophage PHI-29 conector. Domain 3

Domain ID domain_id	1fouD01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	246 — Serum Albumin; Chain A, Domain 1
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1fouD02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	500 — Upper collar protein gp10 (connector protein) fold
Homologous superfamily homologous superfamily	10 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	1fouD03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1350 — Crambin
Homologous superfamily homologous superfamily	20 — Bacteriophage PHI-29 conector. Domain 3

Domain ID domain_id	1fouE01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	246 — Serum Albumin; Chain A, Domain 1
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1fouE02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	500 — Upper collar protein gp10 (connector protein) fold
Homologous superfamily homologous superfamily	10 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	1fouE03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1350 — Crambin
Homologous superfamily homologous superfamily	20 — Bacteriophage PHI-29 conector. Domain 3

Domain ID domain_id	1fouF01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	246 — Serum Albumin; Chain A, Domain 1
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1fouF02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	500 — Upper collar protein gp10 (connector protein) fold
Homologous superfamily homologous superfamily	10 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	1fouF03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1350 — Crambin
Homologous superfamily homologous superfamily	20 — Bacteriophage PHI-29 conector. Domain 3

Domain ID domain_id	1fouG01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	246 — Serum Albumin; Chain A, Domain 1
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1fouG02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	500 — Upper collar protein gp10 (connector protein) fold
Homologous superfamily homologous superfamily	10 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	1fouG03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1350 — Crambin
Homologous superfamily homologous superfamily	20 — Bacteriophage PHI-29 conector. Domain 3

Domain ID domain_id	1fouH01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	246 — Serum Albumin; Chain A, Domain 1
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1fouH02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	500 — Upper collar protein gp10 (connector protein) fold
Homologous superfamily homologous superfamily	10 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	1fouH03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1350 — Crambin
Homologous superfamily homologous superfamily	20 — Bacteriophage PHI-29 conector. Domain 3

Domain ID domain_id	1fouI01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	246 — Serum Albumin; Chain A, Domain 1
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1fouI02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	500 — Upper collar protein gp10 (connector protein) fold
Homologous superfamily homologous superfamily	10 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	1fouI03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1350 — Crambin
Homologous superfamily homologous superfamily	20 — Bacteriophage PHI-29 conector. Domain 3

Domain ID domain_id	1fouJ01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	246 — Serum Albumin; Chain A, Domain 1
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1fouJ02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	500 — Upper collar protein gp10 (connector protein) fold
Homologous superfamily homologous superfamily	10 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	1fouJ03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1350 — Crambin
Homologous superfamily homologous superfamily	20 — Bacteriophage PHI-29 conector. Domain 3

Domain ID domain_id	1fouK01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	246 — Serum Albumin; Chain A, Domain 1
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1fouK02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	500 — Upper collar protein gp10 (connector protein) fold
Homologous superfamily homologous superfamily	10 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	1fouK03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1350 — Crambin
Homologous superfamily homologous superfamily	20 — Bacteriophage PHI-29 conector. Domain 3

Domain ID domain_id	1fouL01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	246 — Serum Albumin; Chain A, Domain 1
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1fouL02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	500 — Upper collar protein gp10 (connector protein) fold
Homologous superfamily homologous superfamily	10 — Upper collar protein gp10 (connector protein)

Domain ID domain_id	1fouL03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1350 — Crambin
Homologous superfamily homologous superfamily	20 — Bacteriophage PHI-29 conector. Domain 3

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Unit-cell length a length_a	177.160 Å
Unit-cell length b length_b	169.240 Å
Unit-cell length c length_c	185.440 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	114.10 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	48

Space group space_group	C 1 2 1
Space-group number int_tables_number	5
Crystal system crystal_system	—

Resolution resolution	3.200 Å
Low-resolution limit resolution_low	9.000 Å
R factor r_factor	0.2700
R_work r_work	0.2900
R_free r_free	0.3600

Description description	UPPER COLLAR PROTEIN
Molecular weight formula_weight	35962.3 kDa
Source method src_method	man
Copy count entity_count	12

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F,G,H,I,J,K,L
Atom count atom_count	25272

CONNECTOR PROTEIN FROM BACTERIOPHAGE PHI29

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

UPPER COLLAR 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

1fou__assembly_1__model_1

1fou__assembly_1__model_1 | I(q)

1fou__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) 48 domains

SCOP 2.08 (12 domains)

CATH v4.4 (36 domains)

7. Citations (1)

Source organism organism	Bacillus phage phi29
NCBI taxonomy ID ncbi_taxonomy_id	10756
Host organism host_organism	Bacillus subtilis

CONNECTOR PROTEIN FROM BACTERIOPHAGE PHI29

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

UPPER COLLAR 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

1fou__assembly_1__model_1

1fou__assembly_1__model_1 | I(q)

1fou__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) 48 domains

SCOP 2.08 (12 domains)

CATH v4.4 (36 domains)

7. Citations (1)