SAXSdb — 4i84

▼

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

Heme/hemopexin-binding protein

Haemophilus influenzae

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

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	HXUA1_HAEIN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 7–307； UniProt 24–324 Author chain B； PDBConstruct 7–307； UniProt 24–324

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.

▼

2. Structure Basics 2. Structure Basics

Entry ID entry_id	4i84
Deposition date deposition_date	2012-12-03
Structure title title	The crystal structure of the Haemophilus influenzae HxuA secretion domain involved in the two-partner secretion pathway
Keywords keywords	beta-helix, TWO-PARTNER SECRETION PATHWAY, HxuB, PROTEIN TRANSPORT; PROTEIN TRANSPORT
Experimental Method method	X-RAY DIFFRACTION

▼

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.

4i84__assembly_1__model_1

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

Download this curve (.dat)

4i84__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

4i84__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	19.94 Å
Rg (electron density)	18.82 Å
Total Rg	19.79 Å
Atom count	2220
Residues	296
Excluded volume	39269 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`4i84__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`4i84__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download

▶

4. Crystallography and Experiment 4. Crystallography & Experiment

▶

5. Entities and Polymers Entities & Polymers (2)

▼

6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id	4i84A00
Class class	2 — Mainly Beta
Architecture architecture	160 — 3 Solenoid
Topology topology	20 — Pectate Lyase C-like
Homologous superfamily homologous superfamily	10 — Single-stranded right-handed beta-helix, Pectin lyase-like

Domain ID domain_id	4i84B00
Class class	2 — Mainly Beta
Architecture architecture	160 — 3 Solenoid
Topology topology	20 — Pectate Lyase C-like
Homologous superfamily homologous superfamily	10 — Single-stranded right-handed beta-helix, Pectin lyase-like

▶

Unit-cell length a length_a	38.990 Å
Unit-cell length b length_b	70.840 Å
Unit-cell length c length_c	104.980 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	98.10 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

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

Resolution resolution	1.500 Å
Low-resolution limit resolution_low	41.900 Å
R factor r_factor	0.1615
R_work r_work	0.1590
R_free r_free	0.2103

Description description	Heme/hemopexin-binding protein
Molecular weight formula_weight	32967.7 kDa
Source method src_method	man
Copy count entity_count	2

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	4879

The crystal structure of the Haemophilus influenzae HxuA secretion domain involved in the two-partner secretion pathway

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

Heme/hemopexin-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

4i84__assembly_1__model_1

4i84__assembly_1__model_1 | I(q)

4i84__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)

Source organism organism	Haemophilus influenzae
NCBI taxonomy ID ncbi_taxonomy_id	71421
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	429

The crystal structure of the Haemophilus influenzae HxuA secretion domain involved in the two-partner secretion pathway

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

Heme/hemopexin-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

4i84__assembly_1__model_1

4i84__assembly_1__model_1 | I(q)

4i84__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)