SAXSdb — 3usy

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

Flagellar motor switch protein

Helicobacter pylori

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
3	Protein homooligomer	Homooligomer	Protein 2	water × 2	Consistent with protein count
4	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	O25119_HELPY
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 7–234； UniProt 116–343 Author chain B； PDBConstruct 7–234； UniProt 116–343

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	3usy
Deposition date deposition_date	2011-11-24
Structure title title	Crystal structure of Flig (residue 116-343) from H. Pylori
Keywords keywords	motor switch protein, flagellar motor, MOTOR PROTEIN; MOTOR 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.

3usy__assembly_2__model_1

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

Download this curve (.dat)

3usy__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3usy__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	25.54 Å
Rg (electron density)	24.64 Å
Total Rg	25.46 Å
Atom count	1762
Residues	226
Excluded volume	31896 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3usy__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3usy__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`3usy__assembly_3__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`3usy__assembly_4__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) 10 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d3usya1
Class class	a — All alpha proteins
Fold Fold fold	a.118 — alpha-alpha superhelix
Superfamily Superfamily superfamily	a.118.14 — FliG
Family Family family	a.118.14.0 — automated matches

Domain ID domain_id	d3usya2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

Domain ID domain_id	d3usyb1
Class class	a — All alpha proteins
Fold Fold fold	a.118 — alpha-alpha superhelix
Superfamily Superfamily superfamily	a.118.14 — FliG
Family Family family	a.118.14.0 — automated matches

Domain ID domain_id	d3usyb2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

CATH v4.4 (6 domains)

Domain ID domain_id	3usyA01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	220 — Annexin V; domain 1
Homologous superfamily homologous superfamily	30 — Flagellar motor switch protein FliG, alpha-alpha superhelical domain

Domain ID domain_id	3usyA02
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	2020 —

Domain ID domain_id	3usyA03
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	220 — Annexin V; domain 1
Homologous superfamily homologous superfamily	30 — Flagellar motor switch protein FliG, alpha-alpha superhelical domain

Domain ID domain_id	3usyB01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	220 — Annexin V; domain 1
Homologous superfamily homologous superfamily	30 — Flagellar motor switch protein FliG, alpha-alpha superhelical domain

Domain ID domain_id	3usyB02
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	2020 —

Domain ID domain_id	3usyB03
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	220 — Annexin V; domain 1
Homologous superfamily homologous superfamily	30 — Flagellar motor switch protein FliG, alpha-alpha superhelical domain

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Unit-cell length a length_a	85.378 Å
Unit-cell length b length_b	102.564 Å
Unit-cell length c length_c	91.582 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	114.69 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	C 1 2 1
Space-group number int_tables_number	5
Crystal system crystal_system	—

Resolution resolution	2.706 Å
Low-resolution limit resolution_low	29.200 Å
R factor r_factor	0.1966
R_work r_work	0.1943
R_free r_free	0.2383

Description description	Flagellar motor switch protein
Molecular weight formula_weight	26120.2 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	3583

Crystal structure of Flig (residue 116-343) from H. Pylori

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

Flagellar motor switch 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

3usy__assembly_2__model_1

3usy__assembly_2__model_1 | I(q)

3usy__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (4 domains)

CATH v4.4 (6 domains)

7. Citations (1)

Source organism organism	Helicobacter pylori
NCBI taxonomy ID ncbi_taxonomy_id	210
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	51

Crystal structure of Flig (residue 116-343) from H. Pylori

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

Flagellar motor switch 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

3usy__assembly_2__model_1

3usy__assembly_2__model_1 | I(q)

3usy__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (4 domains)

CATH v4.4 (6 domains)

7. Citations (1)