SAXSdb — 3a5i

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

Flagellar biosynthesis protein flhA

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	No other associated polymer	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	FLHA_SALTY
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 25–389； UniProt 328–692 Author chain B； PDBConstruct 25–389； UniProt 328–692

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	3a5i
Deposition date deposition_date	2009-08-07
Structure title title	Structure of the cytoplasmic domain of FlhA
Keywords keywords	;four domains, thioredoxin-like fold, Bacterial flagellum biogenesis, Bacterial flagellum protein export, Cell inner membrane, Cell membrane, Membrane, Protein transport, Transmembrane, Transport ;; PROTEIN 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.

3a5i__assembly_1__model_1

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

Download this curve (.dat)

3a5i__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3a5i__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	24.86 Å
Rg (electron density)	23.77 Å
Total Rg	24.59 Å
Atom count	2681
Residues	346
Excluded volume	47960 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3a5i__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3a5i__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 (1)

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6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id	3a5iA01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	30 — Glutaredoxin
Homologous superfamily homologous superfamily	60 — FHIPEP family, domain 1

Domain ID domain_id	3a5iB01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	30 — Glutaredoxin
Homologous superfamily homologous superfamily	60 — FHIPEP family, domain 1

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Unit-cell length a length_a	216.323 Å
Unit-cell length b length_b	216.323 Å
Unit-cell length c length_c	65.070 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	16

Space group space_group	I 41
Space-group number int_tables_number	80
Crystal system crystal_system	—

Resolution resolution	2.800 Å
Low-resolution limit resolution_low	40.800 Å
R factor r_factor	0.2570
R_work r_work	0.2570
R_free r_free	0.2900

Description description	Flagellar biosynthesis protein flhA
Molecular weight formula_weight	43258.3 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	5336

Structure of the cytoplasmic domain of FlhA

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

Flagellar biosynthesis protein flhA

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

3a5i__assembly_1__model_1

3a5i__assembly_1__model_1 | I(q)

3a5i__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

7. Citations (2)

Source organism organism	Salmonella typhimurium
NCBI taxonomy ID ncbi_taxonomy_id	90371
Host organism host_organism	Escherichia coli

Structure of the cytoplasmic domain of FlhA

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

Flagellar biosynthesis protein flhA

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

3a5i__assembly_1__model_1

3a5i__assembly_1__model_1 | I(q)

3a5i__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

7. Citations (2)