SAXSdb — 1eq8

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

ACETYLCHOLINE RECEPTOR PROTEIN

Torpedo californica

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 5	No other associated polymer	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ACHD_TORCA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–23； UniProt 276–298 Author chain B； PDBConstruct 1–23； UniProt 276–298 Author chain C； PDBConstruct 1–23； UniProt 276–298 Author chain D； PDBConstruct 1–23； UniProt 276–298 Author chain E； PDBConstruct 1–23； UniProt 276–298

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	1eq8
Deposition date deposition_date	2000-04-03
Structure title title	THREE-DIMENSIONAL STRUCTURE OF THE PENTAMERIC HELICAL BUNDLE OF THE ACETYLCHOLINE RECEPTOR M2 TRANSMEMBRANE SEGMENT
Keywords keywords	NEUROTRANSMITTER RECEPTOR, M2, LIPID BILAYERS, ION-CHANNEL, HELICAL BUNDLE, PENTAMERIC BUNDLE, SIGNALING PROTEIN; SIGNALING PROTEIN
Experimental Method method	SOLID-STATE NMR

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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.

1eq8__assembly_1__model_1

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

Download this curve (.dat)

1eq8__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1eq8__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	15.88 Å
Rg (electron density)	14.63 Å
Total Rg	16.18 Å
Atom count	1846
Residues	115
Excluded volume	16321 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1eq8__assembly_1__model_1`	pentameric （5）	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) 5 domains

SCOP 2.08 (5 domains)

Domain ID domain_id	d1eq8a_
Class class	j — Peptides
Fold Fold fold	j.35 — Transmembrane helical fragments
Superfamily Superfamily superfamily	j.35.1 — Transmembrane helical fragments
Family Family family	j.35.1.1 — Transmembrane helical fragments

Domain ID domain_id	d1eq8b_
Class class	j — Peptides
Fold Fold fold	j.35 — Transmembrane helical fragments
Superfamily Superfamily superfamily	j.35.1 — Transmembrane helical fragments
Family Family family	j.35.1.1 — Transmembrane helical fragments

Domain ID domain_id	d1eq8c_
Class class	j — Peptides
Fold Fold fold	j.35 — Transmembrane helical fragments
Superfamily Superfamily superfamily	j.35.1 — Transmembrane helical fragments
Family Family family	j.35.1.1 — Transmembrane helical fragments

Domain ID domain_id	d1eq8d_
Class class	j — Peptides
Fold Fold fold	j.35 — Transmembrane helical fragments
Superfamily Superfamily superfamily	j.35.1 — Transmembrane helical fragments
Family Family family	j.35.1.1 — Transmembrane helical fragments

Domain ID domain_id	d1eq8e_
Class class	j — Peptides
Fold Fold fold	j.35 — Transmembrane helical fragments
Superfamily Superfamily superfamily	j.35.1 — Transmembrane helical fragments
Family Family family	j.35.1.1 — Transmembrane helical fragments

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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	—

Description description	ACETYLCHOLINE RECEPTOR PROTEIN
Molecular weight formula_weight	2522.0 kDa
Source method src_method	man
Copy count entity_count	5

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E
Atom count atom_count	1846

Source organism organism	Torpedo californica
Common name common_name	Pacific electric ray
NCBI taxonomy ID ncbi_taxonomy_id	7787
Host organism host_organism	Escherichia coli BL21

THREE-DIMENSIONAL STRUCTURE OF THE PENTAMERIC HELICAL BUNDLE OF THE ACETYLCHOLINE RECEPTOR M2 TRANSMEMBRANE SEGMENT

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

ACETYLCHOLINE RECEPTOR 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

1eq8__assembly_1__model_1

1eq8__assembly_1__model_1 | I(q)

1eq8__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

5. Entities and Polymers Entities & Polymers (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 5 domains

SCOP 2.08 (5 domains)

7. Citations (2)

THREE-DIMENSIONAL STRUCTURE OF THE PENTAMERIC HELICAL BUNDLE OF THE ACETYLCHOLINE RECEPTOR M2 TRANSMEMBRANE SEGMENT

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

ACETYLCHOLINE RECEPTOR 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

1eq8__assembly_1__model_1

1eq8__assembly_1__model_1 | I(q)

1eq8__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

5. Entities and Polymers Entities & Polymers (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 5 domains

SCOP 2.08 (5 domains)

7. Citations (2)