2ft1

Bacteriophage HK97 Head II

Method: X-RAY DIFFRACTION

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

major capsid protein

Enterobacteria phage HK97

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 420	No other associated polymer	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 7	No other associated polymer	Consistent with protein count
3	Protein homooligomer	Homooligomer	Protein 35	No other associated polymer	Consistent with protein count
4	Protein homooligomer	Homooligomer	Protein 42	No other associated polymer	Consistent with protein count
5	Protein homooligomer	Homooligomer	Protein 7	No other associated polymer	Consistent with protein count
6	Protein homooligomer	Homooligomer	Protein 210	No other associated polymer	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	COAT_BPHK7
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–282； UniProt 104–385 Author chain B； PDBConstruct 1–282； UniProt 104–385 Author chain C； PDBConstruct 1–282； UniProt 104–385 Author chain D； PDBConstruct 1–282； UniProt 104–385 Author chain E； PDBConstruct 1–282； UniProt 104–385 Author chain F； PDBConstruct 1–282； UniProt 104–385 Author chain G； PDBConstruct 1–282； UniProt 104–385

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	2ft1
Deposition date deposition_date	2006-01-23
Structure title title	Bacteriophage HK97 Head II
Keywords keywords	Bacteriophage, HK97, capsid protein, mature capsid, icosahedral VIRUS, VIRUS; VIRUS
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.

2ft1__assembly_1__model_1

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

Download this curve (.dat)

2ft1__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2ft1__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	0.00 Å
Rg (electron density)	281.60 Å
Total Rg	281.50 Å
Atom count	886620
Residues	115140
Excluded volume	15678000 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2ft1__assembly_1__model_1`	complete icosahedral assembly （420）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2ft1__assembly_2__model_1`	heptameric （7）	Excluded	—	—
	Exclusion reason： Auxiliary symmetry representation; not a complete or representative biological assembly.
3	1	`2ft1__assembly_3__model_1`	35-meric （35）	Excluded	—	—
	Exclusion reason： Auxiliary symmetry representation; not a complete or representative biological assembly.
4	1	`2ft1__assembly_4__model_1`	42-meric （42）	Excluded	—	—
	Exclusion reason： Auxiliary symmetry representation; not a complete or representative biological assembly.
5	1	`2ft1__assembly_5__model_1`	heptameric （7）	Excluded	—	—
	Exclusion reason： Auxiliary symmetry representation; not a complete or representative biological assembly.
6	1	`2ft1__assembly_6__model_1`	210-meric （210）	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) 19 domains

SCOP 2.08 (5 domains)

Domain ID domain_id	d2ft1a1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.183 — Major capsid protein gp5
Superfamily Superfamily superfamily	d.183.1 — Major capsid protein gp5
Family Family family	d.183.1.1 — Major capsid protein gp5

Domain ID domain_id	d2ft1b1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.183 — Major capsid protein gp5
Superfamily Superfamily superfamily	d.183.1 — Major capsid protein gp5
Family Family family	d.183.1.1 — Major capsid protein gp5

Domain ID domain_id	d2ft1c1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.183 — Major capsid protein gp5
Superfamily Superfamily superfamily	d.183.1 — Major capsid protein gp5
Family Family family	d.183.1.1 — Major capsid protein gp5

Domain ID domain_id	d2ft1d1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.183 — Major capsid protein gp5
Superfamily Superfamily superfamily	d.183.1 — Major capsid protein gp5
Family Family family	d.183.1.1 — Major capsid protein gp5

Domain ID domain_id	d2ft1e1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.183 — Major capsid protein gp5
Superfamily Superfamily superfamily	d.183.1 — Major capsid protein gp5
Family Family family	d.183.1.1 — Major capsid protein gp5

CATH v4.4 (14 domains)

Domain ID domain_id	2ft1A01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	2400 — Major capsid protein gp5 fold
Homologous superfamily homologous superfamily	10 — Major capsid protein gp5

Domain ID domain_id	2ft1A02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	2320 — hypothetical protein PF0899 fold
Homologous superfamily homologous superfamily	10 — hypothetical protein PF0899 domain

Domain ID domain_id	2ft1B01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	2400 — Major capsid protein gp5 fold
Homologous superfamily homologous superfamily	10 — Major capsid protein gp5

Domain ID domain_id	2ft1B02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	2320 — hypothetical protein PF0899 fold
Homologous superfamily homologous superfamily	10 — hypothetical protein PF0899 domain

Domain ID domain_id	2ft1C01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	2400 — Major capsid protein gp5 fold
Homologous superfamily homologous superfamily	10 — Major capsid protein gp5

Domain ID domain_id	2ft1C02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	2320 — hypothetical protein PF0899 fold
Homologous superfamily homologous superfamily	10 — hypothetical protein PF0899 domain

Domain ID domain_id	2ft1D01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	2400 — Major capsid protein gp5 fold
Homologous superfamily homologous superfamily	10 — Major capsid protein gp5

Domain ID domain_id	2ft1D02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	2320 — hypothetical protein PF0899 fold
Homologous superfamily homologous superfamily	10 — hypothetical protein PF0899 domain

Domain ID domain_id	2ft1E01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	2400 — Major capsid protein gp5 fold
Homologous superfamily homologous superfamily	10 — Major capsid protein gp5

Domain ID domain_id	2ft1E02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	2320 — hypothetical protein PF0899 fold
Homologous superfamily homologous superfamily	10 — hypothetical protein PF0899 domain

Domain ID domain_id	2ft1F01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	2400 — Major capsid protein gp5 fold
Homologous superfamily homologous superfamily	10 — Major capsid protein gp5

Domain ID domain_id	2ft1F02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	2320 — hypothetical protein PF0899 fold
Homologous superfamily homologous superfamily	10 — hypothetical protein PF0899 domain

Domain ID domain_id	2ft1G01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	2400 — Major capsid protein gp5 fold
Homologous superfamily homologous superfamily	10 — Major capsid protein gp5

Domain ID domain_id	2ft1G02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	2320 — hypothetical protein PF0899 fold
Homologous superfamily homologous superfamily	10 — hypothetical protein PF0899 domain

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Unit-cell length a length_a	1009.804 Å
Unit-cell length b length_b	1009.804 Å
Unit-cell length c length_c	732.873 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	1680

Space group space_group	P 43 21 2
Space-group number int_tables_number	96
Crystal system crystal_system	—

Resolution resolution	3.900 Å
Low-resolution limit resolution_low	30.000 Å
R factor r_factor	—
R_work r_work	0.2970
R_free r_free	—

Description description	major capsid protein
Molecular weight formula_weight	30804.6 kDa
Source method src_method	man
Copy count entity_count	7

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F,G
Atom count atom_count	14777

Bacteriophage HK97 Head II

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

major capsid 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

2ft1__assembly_1__model_1

2ft1__assembly_1__model_1 | I(q)

2ft1__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) 19 domains

SCOP 2.08 (5 domains)

CATH v4.4 (14 domains)

7. Citations (1)

Source organism organism	Enterobacteria phage HK97
NCBI taxonomy ID ncbi_taxonomy_id	37554
Host organism host_organism	Escherichia coli BL21(DE3)

Bacteriophage HK97 Head II

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

major capsid 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

2ft1__assembly_1__model_1

2ft1__assembly_1__model_1 | I(q)

2ft1__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) 19 domains

SCOP 2.08 (5 domains)

CATH v4.4 (14 domains)

7. Citations (1)