SAXSdb — 1b44

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

PROTEIN (B-POL SUBUNIT OF HEAT-LABILE ENTEROTOXIN)

Escherichia coli

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	ELBH_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain D； PDBConstruct 1–103； UniProt 22–124 Author chain E； PDBConstruct 1–103； UniProt 22–124 Author chain F； PDBConstruct 1–103； UniProt 22–124 Author chain G； PDBConstruct 1–103； UniProt 22–124 Author chain H； PDBConstruct 1–103； UniProt 22–124

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	1b44
Deposition date deposition_date	1999-01-04
Structure title title	CRYSTAL STRUCTURE OF THE B SUBUNIT OF HEAT-LABILE ENTEROTOXIN FROM E. COLI CARRYING A PEPTIDE WITH ANTI-HSV ACTIVITY
Keywords keywords	B SUBUNIT, HEAT-LABILE ENTEROTOXIN ANTI-HSV, TOXIN; 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.

1b44__assembly_1__model_1

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

Download this curve (.dat)

1b44__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1b44__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	24.51 Å
Rg (electron density)	23.19 Å
Total Rg	23.93 Å
Atom count	4186
Residues	531
Excluded volume	75163 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1b44__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) 10 domains

SCOP 2.08 (5 domains)

Domain ID domain_id	d1b44d_
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.2 — Bacterial enterotoxins
Family Family family	b.40.2.1 — Bacterial AB5 toxins, B-subunits

Domain ID domain_id	d1b44e_
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.2 — Bacterial enterotoxins
Family Family family	b.40.2.1 — Bacterial AB5 toxins, B-subunits

Domain ID domain_id	d1b44f_
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.2 — Bacterial enterotoxins
Family Family family	b.40.2.1 — Bacterial AB5 toxins, B-subunits

Domain ID domain_id	d1b44g_
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.2 — Bacterial enterotoxins
Family Family family	b.40.2.1 — Bacterial AB5 toxins, B-subunits

Domain ID domain_id	d1b44h_
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.2 — Bacterial enterotoxins
Family Family family	b.40.2.1 — Bacterial AB5 toxins, B-subunits

CATH v4.4 (5 domains)

Domain ID domain_id	1b44D00
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1b44E00
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1b44F00
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1b44G00
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1b44H00
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	110 —

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Unit-cell length a length_a	127.100 Å
Unit-cell length b length_b	127.100 Å
Unit-cell length c length_c	176.100 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	40

Space group space_group	P 41 21 2
Space-group number int_tables_number	92
Crystal system crystal_system	—

Resolution resolution	3.300 Å
Low-resolution limit resolution_low	10.000 Å
R factor r_factor	0.2120
R_work r_work	0.2120
R_free r_free	0.2550

Description description	PROTEIN (B-POL SUBUNIT OF HEAT-LABILE ENTEROTOXIN)
Molecular weight formula_weight	14293.3 kDa
Source method src_method	man
Copy count entity_count	5

Polymer type type	polypeptide(L)
Chain IDs strand_id	D,E,F,G,H
Atom count atom_count	4186

CRYSTAL STRUCTURE OF THE B SUBUNIT OF HEAT-LABILE ENTEROTOXIN FROM E. COLI CARRYING A PEPTIDE WITH ANTI-HSV ACTIVITY

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

PROTEIN (B-POL SUBUNIT OF HEAT-LABILE ENTEROTOXIN)

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

1b44__assembly_1__model_1

1b44__assembly_1__model_1 | I(q)

1b44__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (5 domains)

CATH v4.4 (5 domains)

7. Citations (3)

Source organism organism	Escherichia coli
NCBI taxonomy ID ncbi_taxonomy_id	562
Host organism host_organism	Vibrio cholerae

CRYSTAL STRUCTURE OF THE B SUBUNIT OF HEAT-LABILE ENTEROTOXIN FROM E. COLI CARRYING A PEPTIDE WITH ANTI-HSV ACTIVITY

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

PROTEIN (B-POL SUBUNIT OF HEAT-LABILE ENTEROTOXIN)

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

1b44__assembly_1__model_1

1b44__assembly_1__model_1 | I(q)

1b44__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (5 domains)

CATH v4.4 (5 domains)

7. Citations (3)