2xh6

Clostridium perfringens enterotoxin

Method: X-RAY DIFFRACTION

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

HEAT-LABILE ENTEROTOXIN B CHAIN

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	octyl beta-D-glucopyranoside × 1 1,4-DIETHYLENE DIOXIDE × 3 water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	octyl beta-D-glucopyranoside × 1 water × 1	Consistent with protein count
3	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ELTB_CLOPE
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–319； UniProt 1–319 Author chain B； PDBConstruct 1–319； UniProt 1–319 Author chain C； PDBConstruct 1–319； UniProt 1–319

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	2xh6
Deposition date deposition_date	2010-06-09
Structure title title	Clostridium perfringens enterotoxin
Keywords keywords	TOXIN, FOOD POISONING, ANTIBIOTIC-ASSOCIATED DIARRHOEA; TOXIN
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.

2xh6__assembly_2__model_1

Assembly 2 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

2xh6__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2xh6__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	26.21 Å
Rg (electron density)	26.04 Å
Total Rg	26.43 Å
Atom count	2214
Residues	283
Excluded volume	39301 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2xh6__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2xh6__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`2xh6__assembly_3__model_1`	monomeric （1）	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 (4)

Entity 1 Entity 1 polymer

Description description	HEAT-LABILE ENTEROTOXIN B CHAIN
Molecular weight formula_weight	35345.2 kDa
Source method src_method	nat
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C
Atom count atom_count	6848

MLSNNLNPMVFENAKEVFLISEDLKTPINITNSNSNLSDGLYVIDKGDGWILGEPSVVSSQILNPNETGTFSQSLTKSKEVSINVNFSVGFTSEFIQASVEYGFGITIGEQNTTERSVSTTAGPNEYVYYKVYATYRKYQAIRISHGNISDDGSIYKLTGIWLSKTSADSLGNIDQGSLIETGERCVLTVPSTDIEKEILDLAAATERLNLTDALNSNPAGNLYDWRSSNSYPWTQKLNLHLTITATGQKYRILASKIVDFNIYSNNFNNLVKLEQSLGDGVKDHYVDISLDAGQYVLVMKANSSYSGNYPYSILFQKF

Entity 2 Entity 2 non-polymer

Description description	octyl beta-D-glucopyranoside
Molecular weight formula_weight	292.4 kDa
Source method src_method	man
Copy count entity_count	2

Entity 3 Entity 3 non-polymer

Description description	1,4-DIETHYLENE DIOXIDE
Molecular weight formula_weight	88.1 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	179

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6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d2xh6a1
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.8 — Aerolisin/ETX pore-forming domain
Superfamily Superfamily superfamily	f.8.1 — Aerolisin/ETX pore-forming domain
Family Family family	f.8.1.3 — Clostridium perfringens enterotoxin (CPE), pore-forming domain

Domain ID domain_id	d2xh6a2
Class class	b — All beta proteins
Fold Fold fold	b.18 — Galactose-binding domain-like
Superfamily Superfamily superfamily	b.18.1 — Galactose-binding domain-like
Family Family family	b.18.1.0 — automated matches

Domain ID domain_id	d2xh6b1
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.8 — Aerolisin/ETX pore-forming domain
Superfamily Superfamily superfamily	f.8.1 — Aerolisin/ETX pore-forming domain
Family Family family	f.8.1.3 — Clostridium perfringens enterotoxin (CPE), pore-forming domain

Domain ID domain_id	d2xh6b2
Class class	b — All beta proteins
Fold Fold fold	b.18 — Galactose-binding domain-like
Superfamily Superfamily superfamily	b.18.1 — Galactose-binding domain-like
Family Family family	b.18.1.0 — automated matches

Domain ID domain_id	d2xh6c1
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.8 — Aerolisin/ETX pore-forming domain
Superfamily Superfamily superfamily	f.8.1 — Aerolisin/ETX pore-forming domain
Family Family family	f.8.1.3 — Clostridium perfringens enterotoxin (CPE), pore-forming domain

Domain ID domain_id	d2xh6c2
Class class	b — All beta proteins
Fold Fold fold	b.18 — Galactose-binding domain-like
Superfamily Superfamily superfamily	b.18.1 — Galactose-binding domain-like
Family Family family	b.18.1.0 — automated matches

CATH v4.4 (6 domains)

Domain ID domain_id	2xh6A01
Class class	2 — Mainly Beta
Architecture architecture	170 — Beta Complex
Topology topology	15 — Proaerolysin; Chain A, domain 3
Homologous superfamily homologous superfamily	20 —

Domain ID domain_id	2xh6A02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	1050 —

Domain ID domain_id	2xh6B01
Class class	2 — Mainly Beta
Architecture architecture	170 — Beta Complex
Topology topology	15 — Proaerolysin; Chain A, domain 3
Homologous superfamily homologous superfamily	20 —

Domain ID domain_id	2xh6B02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	1050 —

Domain ID domain_id	2xh6C01
Class class	2 — Mainly Beta
Architecture architecture	170 — Beta Complex
Topology topology	15 — Proaerolysin; Chain A, domain 3
Homologous superfamily homologous superfamily	20 —

Domain ID domain_id	2xh6C02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	1050 —

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Unit-cell length a length_a	210.664 Å
Unit-cell length b length_b	119.296 Å
Unit-cell length c length_c	74.834 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	110.50 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	12

Space group space_group	C 1 2 1
Space-group number int_tables_number	5
Crystal system crystal_system	—

Resolution resolution	2.690 Å
Low-resolution limit resolution_low	63.393 Å
R factor r_factor	0.2131
R_work r_work	0.2112
R_free r_free	0.2492

Clostridium perfringens enterotoxin

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

HEAT-LABILE ENTEROTOXIN B CHAIN

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

2xh6__assembly_2__model_1

2xh6__assembly_2__model_1 | I(q)

2xh6__assembly_2__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (2)

Clostridium perfringens enterotoxin

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

HEAT-LABILE ENTEROTOXIN B CHAIN

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

2xh6__assembly_2__model_1

2xh6__assembly_2__model_1 | I(q)

2xh6__assembly_2__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (2)