SAXSdb — 3cgy

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

Virulence sensor histidine kinase phoQ

Salmonella typhimurium

State in the Current Structure

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

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PHOQ_SALTY
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 2–157； UniProt 332–487 Author chain B； PDBConstruct 2–157； UniProt 332–487 Author chain C； PDBConstruct 2–157； UniProt 332–487

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	3cgy
Deposition date deposition_date	2008-03-06
Structure title title	Crystal Structure of Salmonella Sensor Kinase PhoQ catalytic domain in complex with radicicol
Keywords keywords	;Alpha-Beta Sandwich, Bergerat Fold, ATP-binding, Growth regulation, Inner membrane, Kinase, Magnesium, Membrane, Metal-binding, Nucleotide-binding, Phosphoprotein, Transferase, Transmembrane, Two-component regulatory system, Virulence ;; TRANSFERASE
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.

3cgy__assembly_1__model_1

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

Download this curve (.dat)

3cgy__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3cgy__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	16.19 Å
Rg (electron density)	15.19 Å
Total Rg	16.30 Å
Atom count	1051
Residues	133
Excluded volume	18696 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3cgy__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3cgy__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`3cgy__assembly_3__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 (2)

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6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d3cgya1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.122 — ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase
Superfamily Superfamily superfamily	d.122.1 — ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase
Family Family family	d.122.1.3 — Histidine kinase

Domain ID domain_id	d3cgya2
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	d3cgyb_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.122 — ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase
Superfamily Superfamily superfamily	d.122.1 — ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase
Family Family family	d.122.1.3 — Histidine kinase

Domain ID domain_id	d3cgyc_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.122 — ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase
Superfamily Superfamily superfamily	d.122.1 — ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase
Family Family family	d.122.1.3 — Histidine kinase

CATH v4.4 (3 domains)

Domain ID domain_id	3cgyA00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	565 — Heat Shock Protein 90
Homologous superfamily homologous superfamily	10 — Histidine kinase-like ATPase, C-terminal domain

Domain ID domain_id	3cgyB00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	565 — Heat Shock Protein 90
Homologous superfamily homologous superfamily	10 — Histidine kinase-like ATPase, C-terminal domain

Domain ID domain_id	3cgyC00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	565 — Heat Shock Protein 90
Homologous superfamily homologous superfamily	10 — Histidine kinase-like ATPase, C-terminal domain

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Unit-cell length a length_a	87.923 Å
Unit-cell length b length_b	63.759 Å
Unit-cell length c length_c	87.772 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	121.41 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	12

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

Resolution resolution	2.600 Å
Low-resolution limit resolution_low	30.000 Å
R factor r_factor	—
R_work r_work	0.2460
R_free r_free	0.2990

Description description	Virulence sensor histidine kinase phoQ
Molecular weight formula_weight	17362.6 kDa
EC 编号 ec_number	2.7.13.3
Source method src_method	man
Copy count entity_count	3

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C
Atom count atom_count	2993

Crystal Structure of Salmonella Sensor Kinase PhoQ catalytic domain in complex with radicicol

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

Virulence sensor histidine kinase phoQ

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

3cgy__assembly_1__model_1

3cgy__assembly_1__model_1 | I(q)

3cgy__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 non-polymer

6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (4 domains)

CATH v4.4 (3 domains)

7. Citations (1)

Source organism organism	Salmonella typhimurium
NCBI taxonomy ID ncbi_taxonomy_id	602
Host organism host_organism	Escherichia coli

Description description	RADICICOL
Molecular weight formula_weight	364.8 kDa
Source method src_method	syn
Copy count entity_count	3

Crystal Structure of Salmonella Sensor Kinase PhoQ catalytic domain in complex with radicicol

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

Virulence sensor histidine kinase phoQ

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

3cgy__assembly_1__model_1

3cgy__assembly_1__model_1 | I(q)

3cgy__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 non-polymer

6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (4 domains)

CATH v4.4 (3 domains)

7. Citations (1)