3del

The structure of CT381, the arginine binding protein from the periplasm Chlamydia trachomatis

Method: X-RAY DIFFRACTION

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

Arginine Binding Protein

Chlamydia trachomatis

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count
3	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count
4	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	O84385_CHLTR
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain B； PDBConstruct 1–234； UniProt 24–257 Author chain C； PDBConstruct 1–234； UniProt 24–257 Author chain D； PDBConstruct 1–234； UniProt 24–257 Author chain F； PDBConstruct 1–234； UniProt 24–257

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	3del
Deposition date deposition_date	2008-06-10
Structure title title	The structure of CT381, the arginine binding protein from the periplasm Chlamydia trachomatis
Keywords keywords	Alpha and Beta protein (a/b), periplasmic protein, arginine binding, PROTEIN BINDING, TRANSPORT PROTEIN; PROTEIN BINDING, TRANSPORT 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.

3del__assembly_4__model_1

Assembly 4 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

3del__assembly_4__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3del__assembly_4__model_1 | P(r) · Pending

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

Rg（Guinier）	20.73 Å
Rg (electron density)	19.90 Å
Total Rg	20.86 Å
Atom count	1843
Residues	232
Excluded volume	33058 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3del__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3del__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`3del__assembly_3__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`3del__assembly_4__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 (2)

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6. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

Domain ID domain_id	d3delb1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.94 — Periplasmic binding protein-like II
Superfamily Superfamily superfamily	c.94.1 — Periplasmic binding protein-like II
Family Family family	c.94.1.0 — automated matches

Domain ID domain_id	d3delb2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

Domain ID domain_id	d3delc1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.94 — Periplasmic binding protein-like II
Superfamily Superfamily superfamily	c.94.1 — Periplasmic binding protein-like II
Family Family family	c.94.1.0 — automated matches

Domain ID domain_id	d3delc2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

Domain ID domain_id	d3deld1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.94 — Periplasmic binding protein-like II
Superfamily Superfamily superfamily	c.94.1 — Periplasmic binding protein-like II
Family Family family	c.94.1.0 — automated matches

Domain ID domain_id	d3deld2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

Domain ID domain_id	d3delf1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.94 — Periplasmic binding protein-like II
Superfamily Superfamily superfamily	c.94.1 — Periplasmic binding protein-like II
Family Family family	c.94.1.0 — automated matches

Domain ID domain_id	d3delf2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

CATH v4.4 (8 domains)

Domain ID domain_id	3delB01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	190 — D-Maltodextrin-Binding Protein; domain 2
Homologous superfamily homologous superfamily	10 — Periplasmic binding protein-like II

Domain ID domain_id	3delB02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	190 — D-Maltodextrin-Binding Protein; domain 2
Homologous superfamily homologous superfamily	10 — Periplasmic binding protein-like II

Domain ID domain_id	3delC01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	190 — D-Maltodextrin-Binding Protein; domain 2
Homologous superfamily homologous superfamily	10 — Periplasmic binding protein-like II

Domain ID domain_id	3delC02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	190 — D-Maltodextrin-Binding Protein; domain 2
Homologous superfamily homologous superfamily	10 — Periplasmic binding protein-like II

Domain ID domain_id	3delD01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	190 — D-Maltodextrin-Binding Protein; domain 2
Homologous superfamily homologous superfamily	10 — Periplasmic binding protein-like II

Domain ID domain_id	3delD02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	190 — D-Maltodextrin-Binding Protein; domain 2
Homologous superfamily homologous superfamily	10 — Periplasmic binding protein-like II

Domain ID domain_id	3delF01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	190 — D-Maltodextrin-Binding Protein; domain 2
Homologous superfamily homologous superfamily	10 — Periplasmic binding protein-like II

Domain ID domain_id	3delF02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	190 — D-Maltodextrin-Binding Protein; domain 2
Homologous superfamily homologous superfamily	10 — Periplasmic binding protein-like II

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Unit-cell length a length_a	40.072 Å
Unit-cell length b length_b	121.875 Å
Unit-cell length c length_c	170.097 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	95.38 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	1.920 Å
Low-resolution limit resolution_low	30.000 Å
R factor r_factor	0.1960
R_work r_work	0.1958
R_free r_free	0.2133

Description description	Arginine Binding Protein
Molecular weight formula_weight	27128.0 kDa
Source method src_method	man
Copy count entity_count	4

Polymer type type	polypeptide(L)
Chain IDs strand_id	B,C,D,F
Atom count atom_count	8711

The structure of CT381, the arginine binding protein from the periplasm Chlamydia trachomatis

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

Arginine Binding 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

3del__assembly_4__model_1

3del__assembly_4__model_1 | I(q)

3del__assembly_4__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) 16 domains

SCOP 2.08 (8 domains)

CATH v4.4 (8 domains)

7. Citations (1)

Source organism organism	Chlamydia trachomatis
NCBI taxonomy ID ncbi_taxonomy_id	813
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	1284

The structure of CT381, the arginine binding protein from the periplasm Chlamydia trachomatis

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

Arginine Binding 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

3del__assembly_4__model_1

3del__assembly_4__model_1 | I(q)

3del__assembly_4__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) 16 domains

SCOP 2.08 (8 domains)

CATH v4.4 (8 domains)

7. Citations (1)