SAXSdb — 1kx9

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

CHEMOSENSORY PROTEIN A6

Mamestra brassicae

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	ACETATE ION × 1 water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	ACETATE ION × 1 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q9NG96_MAMBR
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–112； UniProt 1–112 Author chain B； PDBConstruct 1–112； UniProt 1–112

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	1kx9
Deposition date deposition_date	2002-01-31
Structure title title	ANTENNAL CHEMOSENSORY PROTEIN A6 FROM THE MOTH MAMESTRA BRASSICAE
Keywords keywords	ALL HELIX, LIPID TRANSPORT; LIPID TRANSPORT
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.

1kx9__assembly_1__model_1

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

Download this curve (.dat)

1kx9__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1kx9__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	14.33 Å
Rg (electron density)	13.17 Å
Total Rg	14.47 Å
Atom count	881
Residues	108
Excluded volume	15650 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1kx9__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1kx9__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 (3)

Entity 1 Entity 1 polymer

Description description	CHEMOSENSORY PROTEIN A6
Molecular weight formula_weight	13094.8 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	1980

EDKYTDKYDNINLDEILANKRLLVAYVNCVMERGKCSPEGKELKEHLQDAIENGCKKCTENQEKGAYRVIEHLIKNEIEIWRELTAKYDPTGNWRKKYEDRAKAAGIVIPEE

Source Source

Source organism organism	Mamestra brassicae
Common name common_name	cabbage moth
NCBI taxonomy ID ncbi_taxonomy_id	55057
Host organism host_organism	Escherichia coli BL21

Entity 2 Entity 2 non-polymer

Description description	ACETATE ION
Molecular weight formula_weight	59.0 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	276

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1kx9a_
Class class	a — All alpha proteins
Fold Fold fold	a.118 — alpha-alpha superhelix
Superfamily Superfamily superfamily	a.118.21 — Chemosensory protein Csp2
Family Family family	a.118.21.1 — Chemosensory protein Csp2

Domain ID domain_id	d1kx9b_
Class class	a — All alpha proteins
Fold Fold fold	a.118 — alpha-alpha superhelix
Superfamily Superfamily superfamily	a.118.21 — Chemosensory protein Csp2
Family Family family	a.118.21.1 — Chemosensory protein Csp2

CATH v4.4 (2 domains)

Domain ID domain_id	1kx9A00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	2080 — Antennal chemosensory protein a6
Homologous superfamily homologous superfamily	10 — Insect odorant-binding protein A10/Ejaculatory bulb-specific protein 3

Domain ID domain_id	1kx9B00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	2080 — Antennal chemosensory protein a6
Homologous superfamily homologous superfamily	10 — Insect odorant-binding protein A10/Ejaculatory bulb-specific protein 3

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Unit-cell length a length_a	47.600 Å
Unit-cell length b length_b	49.700 Å
Unit-cell length c length_c	50.300 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	110.10 °
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	1.650 Å
Low-resolution limit resolution_low	14.930 Å
R factor r_factor	—
R_work r_work	0.2040
R_free r_free	0.2400

ANTENNAL CHEMOSENSORY PROTEIN A6 FROM THE MOTH MAMESTRA BRASSICAE

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

CHEMOSENSORY PROTEIN A6

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

1kx9__assembly_1__model_1

1kx9__assembly_1__model_1 | I(q)

1kx9__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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (3)

ANTENNAL CHEMOSENSORY PROTEIN A6 FROM THE MOTH MAMESTRA BRASSICAE

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

CHEMOSENSORY PROTEIN A6

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

1kx9__assembly_1__model_1

1kx9__assembly_1__model_1 | I(q)

1kx9__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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (3)