SAXSdb — 1ktj

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

ALLERGEN DER P 2

Dermatophagoides pteronyssinus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ALL2_DERPT
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–129； UniProt 18–146 Author chain B； PDBConstruct 1–129； UniProt 18–146

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	1ktj
Deposition date deposition_date	2002-01-16
Structure title title	X-ray Structure Of Der P 2, The Major House Dust Mite Allergen
Keywords keywords	allergen, asthma, immunoglobulin fold, hydrophobic cavity; ALLERGEN
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.

1ktj__assembly_1__model_1

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

Download this curve (.dat)

1ktj__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1ktj__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	20.95 Å
Rg (electron density)	19.71 Å
Total Rg	20.61 Å
Atom count	1970
Residues	258
Excluded volume	35313 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1ktj__assembly_1__model_1`	dimeric （2）	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) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1ktja_
Class class	b — All beta proteins
Fold Fold fold	b.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamily	b.1.18 — E set domains
Family Family family	b.1.18.7 — ML domain

Domain ID domain_id	d1ktjb_
Class class	b — All beta proteins
Fold Fold fold	b.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamily	b.1.18 — E set domains
Family Family family	b.1.18.7 — ML domain

CATH v4.4 (2 domains)

Domain ID domain_id	1ktjA00
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	770 —

Domain ID domain_id	1ktjB00
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	770 —

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Unit-cell length a length_a	71.692 Å
Unit-cell length b length_b	108.747 Å
Unit-cell length c length_c	91.971 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	8

Space group space_group	P 2 2 21
Space-group number int_tables_number	17
Crystal system crystal_system	—

Resolution resolution	2.150 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	—
R_work r_work	0.2100
R_free r_free	0.2700

Description description	ALLERGEN DER P 2
Molecular weight formula_weight	14115.3 kDa
Mutation mutation	D1S
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	2140

X-ray Structure Of Der P 2, The Major House Dust Mite Allergen

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

ALLERGEN DER P 2

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

1ktj__assembly_1__model_1

1ktj__assembly_1__model_1 | I(q)

1ktj__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Source organism organism	Dermatophagoides pteronyssinus
Common name common_name	European house dust mite
NCBI taxonomy ID ncbi_taxonomy_id	6956
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	170

X-ray Structure Of Der P 2, The Major House Dust Mite Allergen

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

ALLERGEN DER P 2

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

1ktj__assembly_1__model_1

1ktj__assembly_1__model_1 | I(q)

1ktj__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)