SAXSdb — 2xqh

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

IMMUNOGLOBULIN-BINDING PROTEIN EIBD

ESCHERICHIA COLI

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 3	CHLORIDE ION × 12 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q9MCI8_9CAUD
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 23–281； UniProt 160–418

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	2xqh
Deposition date deposition_date	2010-09-02
Structure title title	Crystal structure of an immunoglobulin-binding fragment of the trimeric autotransporter adhesin EibD
Keywords keywords	CELL ADHESION, VIRULENCE, BETA-HELIX; CELL ADHESION
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.

2xqh__assembly_1__model_1

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

Download this curve (.dat)

2xqh__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2xqh__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	54.01 Å
Rg (electron density)	55.50 Å
Total Rg	55.25 Å
Atom count	5590
Residues	774
Excluded volume	97511 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2xqh__assembly_1__model_1`	trimeric （3）	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 (3)

Entity 1 Entity 1 polymer

Description description	IMMUNOGLOBULIN-BINDING PROTEIN EIBD
Molecular weight formula_weight	29030.8 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	2039

MGSSHHHHHHSSGLVPRGSHMASDAKASGEFSVAVGNGARATEKASTAVGSWAAADGKQSTALGVGTYAYANASTALGSVAFVDNTATYGTAAGNRAKVDKDATEGTALGAKATVTNKNSVALGANSVTTRDNEVYIGYKTGTESDKTYGTRVLGGLSDGTRNSDAATVGQLNRKVGGVYDDVKARITVESEKQKKYTDQKTSEVNEKVEARTTVGVDSDGKLTRAEGATKTIAVNDGLVALSGRTDRIDYAVGAIDGRVTRNTQSIEKNSKAIAANTRTL

Source Source

Source organism organism	ESCHERICHIA COLI
NCBI taxonomy ID ncbi_taxonomy_id	562
Host organism host_organism	ESCHERICHIA COLI

Entity 2 Entity 2 non-polymer

Description description	CHLORIDE ION
Molecular weight formula_weight	35.5 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	173

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6. Fold Classification (SCOP + CATH) 3 domains

CATH v4.4 (3 domains)

Domain ID domain_id	2xqhA01
Class class	2 — Mainly Beta
Architecture architecture	150 — 2 Solenoid
Topology topology	10 — Alkaline Protease, subunit P, domain 1
Homologous superfamily homologous superfamily	10 — Serralysin-like metalloprotease, C-terminal

Domain ID domain_id	2xqhA02
Class class	6 — Special
Architecture architecture	10 — Helix non-globular
Topology topology	250 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	1970 —

Domain ID domain_id	2xqhA03
Class class	6 — Special
Architecture architecture	10 — Helix non-globular
Topology topology	250 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	1980 —

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Unit-cell length a length_a	48.950 Å
Unit-cell length b length_b	48.950 Å
Unit-cell length c length_c	409.600 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	9

Space group space_group	H 3
Space-group number int_tables_number	146
Crystal system crystal_system	—

Resolution resolution	1.990 Å
Low-resolution limit resolution_low	41.512 Å
R factor r_factor	0.1599
R_work r_work	0.1585
R_free r_free	0.1855

Crystal structure of an immunoglobulin-binding fragment of the trimeric autotransporter adhesin EibD

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

IMMUNOGLOBULIN-BINDING PROTEIN EIBD

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

2xqh__assembly_1__model_1

2xqh__assembly_1__model_1 | I(q)

2xqh__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 3 domains

CATH v4.4 (3 domains)

7. Citations (1)

Crystal structure of an immunoglobulin-binding fragment of the trimeric autotransporter adhesin EibD

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

IMMUNOGLOBULIN-BINDING PROTEIN EIBD

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

2xqh__assembly_1__model_1

2xqh__assembly_1__model_1 | I(q)

2xqh__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 3 domains

CATH v4.4 (3 domains)

7. Citations (1)