SAXSdb — 2chu

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

ENTEROCHELIN UPTAKE PERIPLASMIC BINDING PROTEIN

CAMPYLOBACTER JEJUNI

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	ZINC ION × 1 water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	ZINC ION × 1 N,N',N''-[BENZENE-1,3,5-TRIYLTRIS(METHYLENE)]TRIS(2,3-DIHYDROXYBENZAMIDE) × 2 FE (III) ION × 2 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q9PMU4_CAMJE
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–296； UniProt 35–330 Author chain B； PDBConstruct 1–296； UniProt 35–330

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	2chu
Deposition date deposition_date	2006-03-16
Structure title title	CeuE in complex with mecam
Keywords keywords	ENTEROCHELIN UPTAKE, IRON, CAMPYLOBACTER JEJUNI, MECAM, SELF ASSEMBLY, SIDEROPHORE, BINDING PROTEIN; BINDING 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.

2chu__assembly_2__model_1

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

Download this curve (.dat)

2chu__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2chu__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	20.98 Å
Rg (electron density)	19.90 Å
Total Rg	20.86 Å
Atom count	2268
Residues	283
Excluded volume	41054 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2chu__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2chu__assembly_2__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 (5)

Entity 1 Entity 1 polymer

Description description	ENTEROCHELIN UPTAKE PERIPLASMIC BINDING PROTEIN
Molecular weight formula_weight	32670.7 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	4507

KTNTATVKVLPISMSDEGDSFLVKDSLGENKIPKNPSKVVILDLGILDTFDALKLNDKVVGVPAKNLPKYLQQFKNKPSVGGVQQVDFEAINALKPDLIIISGRQSKFYDKLKEIAPTLFVGLDNANFLSSFENNVLSVAKLYGLEKEALEKISDIKNEIEKAKSIVDEDKKALIILTNSNKISAFGPQSRFGIIHDVLGINAVDENIKVGTHGKSINSEFILEKNPDYIFVVDRNVILGNKERAQGILDNALVAKTKAAQNKKIIYLDPEYWYLASGNGLESLKTMILEIKNAVK

Source Source

Source organism organism	CAMPYLOBACTER JEJUNI
NCBI taxonomy ID ncbi_taxonomy_id	197
Host organism host_organism	ESCHERICHIA COLI

Entity 2 Entity 2 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 non-polymer

Description description	N,N',N''-[BENZENE-1,3,5-TRIYLTRIS(METHYLENE)]TRIS(2,3-DIHYDROXYBENZAMIDE)
Molecular weight formula_weight	573.5 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 4 Entity 4 non-polymer

Description description	FE (III) ION
Molecular weight formula_weight	55.8 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	75

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d2chua1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.92 — Chelatase-like
Superfamily Superfamily superfamily	c.92.2 — 'Helical backbone' metal receptor
Family Family family	c.92.2.4 — TM0189-like

Domain ID domain_id	d2chub_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.92 — Chelatase-like
Superfamily Superfamily superfamily	c.92.2 — 'Helical backbone' metal receptor
Family Family family	c.92.2.4 — TM0189-like

CATH v4.4 (4 domains)

Domain ID domain_id	2chuA01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1980 — Nitrogenase molybdenum iron protein domain

Domain ID domain_id	2chuA02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1980 — Nitrogenase molybdenum iron protein domain

Domain ID domain_id	2chuB01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1980 — Nitrogenase molybdenum iron protein domain

Domain ID domain_id	2chuB02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1980 — Nitrogenase molybdenum iron protein domain

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Unit-cell length a length_a	73.072 Å
Unit-cell length b length_b	42.445 Å
Unit-cell length c length_c	57.523 Å
Unit-cell angle α angle_alpha	91.29 °
Unit-cell angle β angle_beta	97.06 °
Unit-cell angle γ angle_gamma	107.34 °
Molecules per unit cell Z z_pdb	2

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

Resolution resolution	2.400 Å
Low-resolution limit resolution_low	69.170 Å
R factor r_factor	0.1740
R_work r_work	0.1700
R_free r_free	0.2460

CeuE in complex with mecam

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

ENTEROCHELIN UPTAKE PERIPLASMIC 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

2chu__assembly_2__model_1

2chu__assembly_2__model_1 | I(q)

2chu__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (2 domains)

CATH v4.4 (4 domains)

7. Citations (1)

CeuE in complex with mecam

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

ENTEROCHELIN UPTAKE PERIPLASMIC 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

2chu__assembly_2__model_1

2chu__assembly_2__model_1 | I(q)

2chu__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (2 domains)

CATH v4.4 (4 domains)

7. Citations (1)