1zku

Fitting of the gp9 structure in the EM density of bacteriophage T4 extended tail

Method: ELECTRON MICROSCOPY

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

Baseplate structural protein Gp9

Enterobacteria phage T4

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 18	4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID × 18	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	VG09_BPT4
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–288； UniProt 1–288 Author chain B； PDBConstruct 1–288； UniProt 1–288 Author chain C； PDBConstruct 1–288； UniProt 1–288 Author chain D； PDBConstruct 1–288； UniProt 1–288 Author chain E； PDBConstruct 1–288； UniProt 1–288 Author chain F； PDBConstruct 1–288； UniProt 1–288 Author chain G； PDBConstruct 1–288； UniProt 1–288 Author chain H； PDBConstruct 1–288； UniProt 1–288 Author chain I； PDBConstruct 1–288； UniProt 1–288 Author chain J； PDBConstruct 1–288； UniProt 1–288 Author chain K； PDBConstruct 1–288； UniProt 1–288 Author chain L； PDBConstruct 1–288； UniProt 1–288 Author chain M； PDBConstruct 1–288； UniProt 1–288 Author chain N； PDBConstruct 1–288； UniProt 1–288 Author chain O； PDBConstruct 1–288； UniProt 1–288 Author chain P； PDBConstruct 1–288； UniProt 1–288 Author chain Q； PDBConstruct 1–288； UniProt 1–288 Author chain R； PDBConstruct 1–288； UniProt 1–288

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	1zku
Deposition date deposition_date	2005-05-04
Structure title title	Fitting of the gp9 structure in the EM density of bacteriophage T4 extended tail
Keywords keywords	Structural protein, Viral protein; VIRAL PROTEIN
Experimental Method method	ELECTRON MICROSCOPY

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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.

1zku__assembly_1__model_1

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

Download this curve (.dat)

1zku__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1zku__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)	157.90 Å
Total Rg	157.90 Å
Atom count	39420
Residues	5184
Excluded volume	699290 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1zku__assembly_1__model_1`	octadecameric （18）	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) 18 domains

SCOP 2.08 (18 domains)

Domain ID domain_id	d1zkua1
Class class	b — All beta proteins
Fold Fold fold	b.32 — gp9
Superfamily Superfamily superfamily	b.32.1 — gp9
Family Family family	b.32.1.1 — gp9

Domain ID domain_id	d1zkub1
Class class	b — All beta proteins
Fold Fold fold	b.32 — gp9
Superfamily Superfamily superfamily	b.32.1 — gp9
Family Family family	b.32.1.1 — gp9

Domain ID domain_id	d1zkuc1
Class class	b — All beta proteins
Fold Fold fold	b.32 — gp9
Superfamily Superfamily superfamily	b.32.1 — gp9
Family Family family	b.32.1.1 — gp9

Domain ID domain_id	d1zkud1
Class class	b — All beta proteins
Fold Fold fold	b.32 — gp9
Superfamily Superfamily superfamily	b.32.1 — gp9
Family Family family	b.32.1.1 — gp9

Domain ID domain_id	d1zkue1
Class class	b — All beta proteins
Fold Fold fold	b.32 — gp9
Superfamily Superfamily superfamily	b.32.1 — gp9
Family Family family	b.32.1.1 — gp9

Domain ID domain_id	d1zkuf1
Class class	b — All beta proteins
Fold Fold fold	b.32 — gp9
Superfamily Superfamily superfamily	b.32.1 — gp9
Family Family family	b.32.1.1 — gp9

Domain ID domain_id	d1zkug1
Class class	b — All beta proteins
Fold Fold fold	b.32 — gp9
Superfamily Superfamily superfamily	b.32.1 — gp9
Family Family family	b.32.1.1 — gp9

Domain ID domain_id	d1zkuh1
Class class	b — All beta proteins
Fold Fold fold	b.32 — gp9
Superfamily Superfamily superfamily	b.32.1 — gp9
Family Family family	b.32.1.1 — gp9

Domain ID domain_id	d1zkui1
Class class	b — All beta proteins
Fold Fold fold	b.32 — gp9
Superfamily Superfamily superfamily	b.32.1 — gp9
Family Family family	b.32.1.1 — gp9

Domain ID domain_id	d1zkuj1
Class class	b — All beta proteins
Fold Fold fold	b.32 — gp9
Superfamily Superfamily superfamily	b.32.1 — gp9
Family Family family	b.32.1.1 — gp9

Domain ID domain_id	d1zkuk1
Class class	b — All beta proteins
Fold Fold fold	b.32 — gp9
Superfamily Superfamily superfamily	b.32.1 — gp9
Family Family family	b.32.1.1 — gp9

Domain ID domain_id	d1zkul1
Class class	b — All beta proteins
Fold Fold fold	b.32 — gp9
Superfamily Superfamily superfamily	b.32.1 — gp9
Family Family family	b.32.1.1 — gp9

Domain ID domain_id	d1zkum1
Class class	b — All beta proteins
Fold Fold fold	b.32 — gp9
Superfamily Superfamily superfamily	b.32.1 — gp9
Family Family family	b.32.1.1 — gp9

Domain ID domain_id	d1zkun1
Class class	b — All beta proteins
Fold Fold fold	b.32 — gp9
Superfamily Superfamily superfamily	b.32.1 — gp9
Family Family family	b.32.1.1 — gp9

Domain ID domain_id	d1zkuo1
Class class	b — All beta proteins
Fold Fold fold	b.32 — gp9
Superfamily Superfamily superfamily	b.32.1 — gp9
Family Family family	b.32.1.1 — gp9

Domain ID domain_id	d1zkup1
Class class	b — All beta proteins
Fold Fold fold	b.32 — gp9
Superfamily Superfamily superfamily	b.32.1 — gp9
Family Family family	b.32.1.1 — gp9

Domain ID domain_id	d1zkuq1
Class class	b — All beta proteins
Fold Fold fold	b.32 — gp9
Superfamily Superfamily superfamily	b.32.1 — gp9
Family Family family	b.32.1.1 — gp9

Domain ID domain_id	d1zkur1
Class class	b — All beta proteins
Fold Fold fold	b.32 — gp9
Superfamily Superfamily superfamily	b.32.1 — gp9
Family Family family	b.32.1.1 — gp9

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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	15.000 Å
Low-resolution limit resolution_low	— Å
R factor r_factor	—
R_work r_work	—
R_free r_free	—

Resolution resolution	15.00 Å
Resolution测定Method resolution_method	REAL SPACE SIRT
颗粒数 num_particles	3029

Description description	Baseplate structural protein Gp9
Molecular weight formula_weight	31024.7 kDa
Source method src_method	man
Copy count entity_count	18

Fitting of the gp9 structure in the EM density of bacteriophage T4 extended tail

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

Baseplate structural protein Gp9

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

1zku__assembly_1__model_1

1zku__assembly_1__model_1 | I(q)

1zku__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

冷冻电镜 EM 3D

5. Entities and Polymers Entities & Polymers (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

6. Fold Classification (SCOP + CATH) 18 domains

SCOP 2.08 (18 domains)

7. Citations (1)

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R
Atom count atom_count	39420

Source organism organism	Enterobacteria phage T4
NCBI taxonomy ID ncbi_taxonomy_id	10665

Fitting of the gp9 structure in the EM density of bacteriophage T4 extended tail

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

Baseplate structural protein Gp9

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

1zku__assembly_1__model_1

1zku__assembly_1__model_1 | I(q)

1zku__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

冷冻电镜 EM 3D

5. Entities and Polymers Entities & Polymers (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

6. Fold Classification (SCOP + CATH) 18 domains

SCOP 2.08 (18 domains)

7. Citations (1)