SAXSdb — 2eia

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

EIAV CAPSID PROTEIN P26

Equine infectious anemia virus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 4	water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	GAG_EIAVY
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–206； UniProt 141–346 Author chain B； PDBConstruct 1–206； UniProt 141–346

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	2eia
Deposition date deposition_date	1998-07-15
Structure title title	X-RAY CRYSTAL STRUCTURE OF EQUINE INFECTIOUS ANEMIA VIRUS (EIAV) CAPSID PROTEIN P26
Keywords keywords	VIRAL CAPSID EIAV, HIV, LENTIVIRUS, 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.

2eia__assembly_1__model_1

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

Download this curve (.dat)

2eia__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2eia__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	30.70 Å
Rg (electron density)	29.69 Å
Total Rg	30.32 Å
Atom count	6534
Residues	820
Excluded volume	115560 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2eia__assembly_1__model_1`	tetrameric （4）	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) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d2eiaa1
Class class	a — All alpha proteins
Fold Fold fold	a.28 — Acyl carrier protein-like
Superfamily Superfamily superfamily	a.28.3 — Retrovirus capsid dimerization domain-like
Family Family family	a.28.3.1 — Retrovirus capsid protein C-terminal domain

Domain ID domain_id	d2eiaa2
Class class	a — All alpha proteins
Fold Fold fold	a.73 — Retrovirus capsid protein, N-terminal core domain
Superfamily Superfamily superfamily	a.73.1 — Retrovirus capsid protein, N-terminal core domain
Family Family family	a.73.1.1 — Retrovirus capsid protein, N-terminal core domain

Domain ID domain_id	d2eiab1
Class class	a — All alpha proteins
Fold Fold fold	a.28 — Acyl carrier protein-like
Superfamily Superfamily superfamily	a.28.3 — Retrovirus capsid dimerization domain-like
Family Family family	a.28.3.1 — Retrovirus capsid protein C-terminal domain

Domain ID domain_id	d2eiab2
Class class	a — All alpha proteins
Fold Fold fold	a.73 — Retrovirus capsid protein, N-terminal core domain
Superfamily Superfamily superfamily	a.73.1 — Retrovirus capsid protein, N-terminal core domain
Family Family family	a.73.1.1 — Retrovirus capsid protein, N-terminal core domain

CATH v4.4 (4 domains)

Domain ID domain_id	2eiaA01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	375 — Human Immunodeficiency Virus Type 1 Capsid Protein
Homologous superfamily homologous superfamily	10 — Human Immunodeficiency Virus Type 1 Capsid Protein

Domain ID domain_id	2eiaA02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	1200 — Non-ribosomal Peptide Synthetase Peptidyl Carrier Protein; Chain A
Homologous superfamily homologous superfamily	30 — Retrovirus capsid C-terminal domain

Domain ID domain_id	2eiaB01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	375 — Human Immunodeficiency Virus Type 1 Capsid Protein
Homologous superfamily homologous superfamily	10 — Human Immunodeficiency Virus Type 1 Capsid Protein

Domain ID domain_id	2eiaB02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	1200 — Non-ribosomal Peptide Synthetase Peptidyl Carrier Protein; Chain A
Homologous superfamily homologous superfamily	30 — Retrovirus capsid C-terminal domain

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Unit-cell length a length_a	100.480 Å
Unit-cell length b length_b	100.480 Å
Unit-cell length c length_c	157.380 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	24

Space group space_group	P 61 2 2
Space-group number int_tables_number	178
Crystal system crystal_system	—

Resolution resolution	2.700 Å
Low-resolution limit resolution_low	48.000 Å
R factor r_factor	0.2360
R_work r_work	0.2360
R_free r_free	0.2940

Description description	EIAV CAPSID PROTEIN P26
Molecular weight formula_weight	23386.5 kDa
Source method src_method	man
Copy count entity_count	2

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	3455

X-RAY CRYSTAL STRUCTURE OF EQUINE INFECTIOUS ANEMIA VIRUS (EIAV) CAPSID PROTEIN P26

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

EIAV CAPSID PROTEIN P26

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

2eia__assembly_1__model_1

2eia__assembly_1__model_1 | I(q)

2eia__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (2)

Source organism organism	Equine infectious anemia virus
NCBI taxonomy ID ncbi_taxonomy_id	11665
Host organism host_organism	Escherichia coli

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	188

X-RAY CRYSTAL STRUCTURE OF EQUINE INFECTIOUS ANEMIA VIRUS (EIAV) CAPSID PROTEIN P26

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

EIAV CAPSID PROTEIN P26

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

2eia__assembly_1__model_1

2eia__assembly_1__model_1 | I(q)

2eia__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (2)