SAXSdb — 1f4v

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

CHEMOTAXIS CHEY PROTEIN

Escherichia coli

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 2	FLAGELLAR MOTOR SWITCH PROTEIN × 1 （P06974） MAGNESIUM ION × 1 BERYLLIUM TRIFLUORIDE ION × 1 GLYCEROL × 1 water × 2	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 2	FLAGELLAR MOTOR SWITCH PROTEIN × 1 （P06974） MAGNESIUM ION × 1 BERYLLIUM TRIFLUORIDE ION × 1 GLYCEROL × 1 water × 2	Consistent with protein count
3	Protein heterocomplex	Heteromer	Protein 2	FLAGELLAR MOTOR SWITCH PROTEIN × 1 （P06974） MAGNESIUM ION × 1 BERYLLIUM TRIFLUORIDE ION × 1 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CHEY_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–128； UniProt 1–128 Author chain B； PDBConstruct 1–128； UniProt 1–128 Author chain C； PDBConstruct 1–128； UniProt 1–128

FLAGELLAR MOTOR SWITCH PROTEIN

OrganismNot specified

UniProt P06974

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 2	CHEMOTAXIS CHEY PROTEIN × 1 （P06143） MAGNESIUM ION × 1 BERYLLIUM TRIFLUORIDE ION × 1 GLYCEROL × 1 water × 2	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 2	CHEMOTAXIS CHEY PROTEIN × 1 （P06143） MAGNESIUM ION × 1 BERYLLIUM TRIFLUORIDE ION × 1 GLYCEROL × 1 water × 2	Consistent with protein count
3	Protein heterocomplex	Heteromer	Protein 2	CHEMOTAXIS CHEY PROTEIN × 1 （P06143） MAGNESIUM ION × 1 BERYLLIUM TRIFLUORIDE ION × 1 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	FLIM_ECOLI
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain D； PDBConstruct 1–16； UniProt 1–16 Author chain E； PDBConstruct 1–16； UniProt 1–16 Author chain F； PDBConstruct 1–16； UniProt 1–16

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	1f4v
Deposition date deposition_date	2000-06-10
Structure title title	CRYSTAL STRUCTURE OF ACTIVATED CHEY BOUND TO THE N-TERMINUS OF FLIM
Keywords keywords	response regulator, peptide-protein complex, bacterial signal transduction, BeF3, SIGNALING PROTEIN; SIGNALING 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.

1f4v__assembly_1__model_1

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

Download this curve (.dat)

1f4v__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1f4v__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	15.80 Å
Rg (electron density)	14.29 Å
Total Rg	15.67 Å
Atom count	1105
Residues	144
Excluded volume	19905 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1f4v__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1f4v__assembly_2__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`1f4v__assembly_3__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 (6)

Entity 1 Entity 1 polymer

Description description	CHEMOTAXIS CHEY PROTEIN
Molecular weight formula_weight	13981.1 kDa
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C
Atom count atom_count	3553

ADKELKFLVVDDFSTMRRIVRNLLKELGFNNVEEAEDGVDALNKLQAGGYGFVISDWNMPNMDGLELLKTIRADGAMSALPVLMVTAEAKKENIIAAAQAGASGYVVKPFTAATLEEKLNKIFEKLGM

Source Source

Source organism organism	Escherichia coli
NCBI taxonomy ID ncbi_taxonomy_id	562
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 polymer

Description description	FLAGELLAR MOTOR SWITCH PROTEIN
Molecular weight formula_weight	1689.9 kDa
Source method src_method	nat
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	D,E,F

MGDSILSQAEIDALLN

Entity 3 Entity 3 non-polymer

Description description	MAGNESIUM ION
Molecular weight formula_weight	24.3 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 4 Entity 4 non-polymer

Description description	BERYLLIUM TRIFLUORIDE ION
Molecular weight formula_weight	66.0 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 5 Entity 5 non-polymer

Description description	GLYCEROL
Molecular weight formula_weight	92.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 6 Entity 6 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	280

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

Domain ID domain_id	d1f4va_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.23 — Flavodoxin-like
Superfamily Superfamily superfamily	c.23.1 — CheY-like
Family Family family	c.23.1.1 — CheY-related

Domain ID domain_id	d1f4vb_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.23 — Flavodoxin-like
Superfamily Superfamily superfamily	c.23.1 — CheY-like
Family Family family	c.23.1.1 — CheY-related

Domain ID domain_id	d1f4vc_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.23 — Flavodoxin-like
Superfamily Superfamily superfamily	c.23.1 — CheY-like
Family Family family	c.23.1.1 — CheY-related

CATH v4.4 (3 domains)

Domain ID domain_id	1f4vA00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	2300 — Response regulator

Domain ID domain_id	1f4vB00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	2300 — Response regulator

Domain ID domain_id	1f4vC00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	2300 — Response regulator

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Unit-cell length a length_a	54.232 Å
Unit-cell length b length_b	54.233 Å
Unit-cell length c length_c	347.433 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	18

Space group space_group	P 32 2 1
Space-group number int_tables_number	154
Crystal system crystal_system	—

Resolution resolution	2.220 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	0.2189
R_work r_work	0.2170
R_free r_free	0.2580

CRYSTAL STRUCTURE OF ACTIVATED CHEY BOUND TO THE N-TERMINUS OF FLIM

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

CHEMOTAXIS CHEY PROTEIN

State in the Current Structure

Other States of the Same Protein in the Database

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

1f4v__assembly_1__model_1

1f4v__assembly_1__model_1 | I(q)

1f4v__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 (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

7. Citations (4)

CRYSTAL STRUCTURE OF ACTIVATED CHEY BOUND TO THE N-TERMINUS OF FLIM

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

CHEMOTAXIS CHEY 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

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

1f4v__assembly_1__model_1

1f4v__assembly_1__model_1 | I(q)

1f4v__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 (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

7. Citations (4)