SAXSdb — 9d2s

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

L-threonine dehydratase biosynthetic IlvA

Escherichia coli

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	ISOLEUCINE × 2 GLYCEROL × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ILVA_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 21–200； UniProt 335–514

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	9d2s
Deposition date deposition_date	2024-08-09
Structure title title	Crystal structure of E. coli Threonine dehydratase regulatory domain F352A mutant in complex with isoleucine
Keywords keywords	Escherichia coli, threonine dehydratase, IlvA, isoleucine, branched-chain amino acids, regulation, allostery, LYASE; LYASE
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.

9d2s__assembly_1__model_1

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

Download this curve (.dat)

9d2s__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

9d2s__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	21.80 Å
Rg (electron density)	20.60 Å
Total Rg	21.46 Å
Atom count	5748
Residues	364
Excluded volume	51783 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`9d2s__assembly_1__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 (4)

Entity 1 Entity 1 polymer

Description description	L-threonine dehydratase biosynthetic IlvA
Molecular weight formula_weight	22715.4 kDa
EC 编号 ec_number	4.3.1.19
Mutation mutation	F352A
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	3029

MGSSHHHHHHSSGLVPRGSHEQREALLAVTIPEEKGSALKFCQLLGGRSVTEFNYRFADAKNACIFVGVRLSRGLEERKEILQMLNDGGYSVVDLSDDEMAKLHVRYMVGGRPSHPLQERLYSFEFPESPGALLRFLNTLGTYWNISLFHYRSHGTDYGRVLAAFELGDHEPDFETRLNELGYDCHDETNNPAFRFFLAG

Source Source

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

Entity 2 Entity 2 non-polymer

Description description	ISOLEUCINE
Molecular weight formula_weight	131.2 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 3 Entity 3 non-polymer

Description description	GLYCEROL
Molecular weight formula_weight	92.1 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	149

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Unit-cell length a length_a	106.376 Å
Unit-cell length b length_b	39.132 Å
Unit-cell length c length_c	56.631 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	117.02 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

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

Resolution resolution	1.220 Å
Low-resolution limit resolution_low	47.380 Å
R factor r_factor	0.1409
R_work r_work	0.1405
R_free r_free	0.1510

Crystal structure of E. coli Threonine dehydratase regulatory domain F352A mutant in complex with isoleucine

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

L-threonine dehydratase biosynthetic IlvA

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

9d2s__assembly_1__model_1

9d2s__assembly_1__model_1 | I(q)

9d2s__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

7. Citations (1)

Crystal structure of E. coli Threonine dehydratase regulatory domain F352A mutant in complex with isoleucine

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

L-threonine dehydratase biosynthetic IlvA

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

9d2s__assembly_1__model_1

9d2s__assembly_1__model_1 | I(q)

9d2s__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

7. Citations (1)