SAXSdb — 3ja7

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

Portal protein gp20

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 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	PORTL_BPT4
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 5–455； UniProt 74–524 Author chain B； PDBConstruct 5–455； UniProt 74–524 Author chain C； PDBConstruct 5–455； UniProt 74–524 Author chain D； PDBConstruct 5–455； UniProt 74–524 Author chain E； PDBConstruct 5–455； UniProt 74–524 Author chain F； PDBConstruct 5–455； UniProt 74–524 Author chain G； PDBConstruct 5–455； UniProt 74–524 Author chain H； PDBConstruct 5–455； UniProt 74–524 Author chain I； PDBConstruct 5–455； UniProt 74–524 Author chain J； PDBConstruct 5–455； UniProt 74–524 Author chain K； PDBConstruct 5–455； UniProt 74–524 Author chain L； PDBConstruct 5–455； UniProt 74–524

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	3ja7
Deposition date deposition_date	2015-04-21
Structure title title	Cryo-EM structure of the bacteriophage T4 portal protein assembly at near-atomic resolution
Keywords keywords	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.

3ja7__assembly_1__model_1

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

Download this curve (.dat)

3ja7__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3ja7__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	55.78 Å
Rg (electron density)	55.30 Å
Total Rg	55.70 Å
Atom count	41280
Residues	5136
Excluded volume	730510 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3ja7__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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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	3.600 Å
Low-resolution limit resolution_low	3.600 Å
R factor r_factor	0.2644
R_work r_work	0.2644
R_free r_free	0.2719

Resolution resolution	3.60 Å
Resolution测定Method resolution_method	Cross-common lines
颗粒数 num_particles	98000

Description description	Portal protein gp20
Molecular weight formula_weight	53358.4 kDa
Source method src_method	man
Copy count entity_count	12

Cryo-EM structure of the bacteriophage T4 portal protein assembly at near-atomic resolution

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

Portal protein gp20

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

3ja7__assembly_1__model_1

3ja7__assembly_1__model_1 | I(q)

3ja7__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

7. Citations (1)

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	41280

Source organism organism	Enterobacteria phage T4
NCBI taxonomy ID ncbi_taxonomy_id	10665
Host organism host_organism	Escherichia coli BL21(DE3)

Cryo-EM structure of the bacteriophage T4 portal protein assembly at near-atomic resolution

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

Portal protein gp20

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

3ja7__assembly_1__model_1

3ja7__assembly_1__model_1 | I(q)

3ja7__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

7. Citations (1)