SAXSdb — 1v7l

▼

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

3-isopropylmalate dehydratase small subunit

Pyrococcus horikoshii

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 8	water × 8	Consistent with protein count
3	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count
4	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	LEUD_PYRHO
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–163； UniProt 1–163 Author chain B； PDBConstruct 1–163； UniProt 1–163

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.

▼

2. Structure Basics 2. Structure Basics

Entry ID entry_id	1v7l
Deposition date deposition_date	2003-12-18
Structure title title	Structure of 3-isopropylmalate isomerase small subunit from Pyrococcus horikoshii
Keywords keywords	BETA BARREL, LYASE; LYASE
Experimental Method method	X-RAY DIFFRACTION

▼

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.

1v7l__assembly_2__model_1

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

Download this curve (.dat)

1v7l__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1v7l__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	33.42 Å
Rg (electron density)	32.46 Å
Total Rg	33.12 Å
Atom count	10112
Residues	1300
Excluded volume	181830 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1v7l__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1v7l__assembly_2__model_1`	octameric （8）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`1v7l__assembly_3__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`1v7l__assembly_4__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download

▶

4. Crystallography and Experiment 4. Crystallography & Experiment

▶

5. Entities and Polymers Entities & Polymers (2)

▼

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1v7la_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.8 — The 'swivelling' beta/beta/alpha domain
Superfamily Superfamily superfamily	c.8.2 — LeuD/IlvD-like
Family Family family	c.8.2.1 — LeuD-like

Domain ID domain_id	d1v7lb_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.8 — The 'swivelling' beta/beta/alpha domain
Superfamily Superfamily superfamily	c.8.2 — LeuD/IlvD-like
Family Family family	c.8.2.1 — LeuD-like

CATH v4.4 (2 domains)

Domain ID domain_id	1v7lA01
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	19 — Aconitase; domain 4
Homologous superfamily homologous superfamily	10 — Aconitase, domain 4

Domain ID domain_id	1v7lB01
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	19 — Aconitase; domain 4
Homologous superfamily homologous superfamily	10 — Aconitase, domain 4

▶

Unit-cell length a length_a	95.208 Å
Unit-cell length b length_b	95.208 Å
Unit-cell length c length_c	152.258 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	24

Space group space_group	P 62 2 2
Space-group number int_tables_number	180
Crystal system crystal_system	—

Resolution resolution	1.980 Å
Low-resolution limit resolution_low	10.000 Å
R factor r_factor	—
R_work r_work	0.2060
R_free r_free	0.2470

Description description	3-isopropylmalate dehydratase small subunit
Molecular weight formula_weight	18033.8 kDa
EC 编号 ec_number	4.2.1.33
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	2822

Structure of 3-isopropylmalate isomerase small subunit from Pyrococcus horikoshii

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

3-isopropylmalate dehydratase small subunit

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

1v7l__assembly_2__model_1

1v7l__assembly_2__model_1 | I(q)

1v7l__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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Source organism organism	Pyrococcus horikoshii
NCBI taxonomy ID ncbi_taxonomy_id	70601
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	294

Structure of 3-isopropylmalate isomerase small subunit from Pyrococcus horikoshii

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

3-isopropylmalate dehydratase small subunit

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

1v7l__assembly_2__model_1

1v7l__assembly_2__model_1 | I(q)

1v7l__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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)