SAXSdb — 2d4v

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

isocitrate dehydrogenase

Acidithiobacillus thiooxidans

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	CITRATE ANION × 2 NICOTINAMIDE-ADENINE-DINUCLEOTIDE × 2 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	CITRATE ANION × 2 NICOTINAMIDE-ADENINE-DINUCLEOTIDE × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q8GAX0_THITH
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–429； UniProt 1–429 Author chain B； PDBConstruct 1–429； UniProt 1–429 Author chain C； PDBConstruct 1–429； UniProt 1–429 Author chain D； PDBConstruct 1–429； UniProt 1–429

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	2d4v
Deposition date deposition_date	2005-10-24
Structure title title	Crystal structure of NAD dependent isocitrate dehydrogenase from Acidithiobacillus thiooxidans
Keywords keywords	alpha and beta protein, Isocitrate/Isopropylmalate dehydrogenase-like fold, OXIDOREDUCTASE; OXIDOREDUCTASE
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.

2d4v__assembly_1__model_1

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

Download this curve (.dat)

2d4v__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2d4v__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	28.23 Å
Rg (electron density)	27.34 Å
Total Rg	28.08 Å
Atom count	6586
Residues	854
Excluded volume	117120 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2d4v__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2d4v__assembly_2__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	isocitrate dehydrogenase
Molecular weight formula_weight	46267.8 kDa
Source method src_method	man
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	14504

MTTHIQKPATGSPLTLLNGVLQVPDQPIIPFIEGDGIGCDVTPAMRSVVDAAVAKVYGGQRQIAWMELFAGQKAVQLYGEGQYLPDETMAAIREYKVAIKGPLETPVGGGIRSLNVAMRQDLDLYVCLRPVRYFEGTPSPMRHPEKVDMVIFRENSEDIYAGIEWPAGSPEAEKIIRFLREEMGVTKIRFPDSSAIGIKPVSTEGSERLIRRTIQYALEHGKPSVSLVHKGNIMKFTEGGFRDWGYALAEREFAGRVFTWRQKAAISKAEGKAAGQKAEQQAIADGKLIIKDVIADNFLQQILLRPEDYSVVATLNLNGDYVSDALAAEVGGIGMAPGANLSDTHAIFEATHGTAPDIAGQGKANPSSLILSAVMMLEHLGWGEAAQAIVAAMNATIAAGEVTGDLAALRGDVPALSTTEFTAALIRRF

Source Source

Source organism organism	Acidithiobacillus thiooxidans
NCBI taxonomy ID ncbi_taxonomy_id	930
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	CITRATE ANION
Molecular weight formula_weight	189.1 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 3 Entity 3 non-polymer

Description description	NICOTINAMIDE-ADENINE-DINUCLEOTIDE
Molecular weight formula_weight	663.4 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	1333

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6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d2d4va_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.77 — Isocitrate/Isopropylmalate dehydrogenase-like
Superfamily Superfamily superfamily	c.77.1 — Isocitrate/Isopropylmalate dehydrogenase-like
Family Family family	c.77.1.1 — Dimeric isocitrate & isopropylmalate dehydrogenases

Domain ID domain_id	d2d4vb_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.77 — Isocitrate/Isopropylmalate dehydrogenase-like
Superfamily Superfamily superfamily	c.77.1 — Isocitrate/Isopropylmalate dehydrogenase-like
Family Family family	c.77.1.1 — Dimeric isocitrate & isopropylmalate dehydrogenases

Domain ID domain_id	d2d4vc_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.77 — Isocitrate/Isopropylmalate dehydrogenase-like
Superfamily Superfamily superfamily	c.77.1 — Isocitrate/Isopropylmalate dehydrogenase-like
Family Family family	c.77.1.1 — Dimeric isocitrate & isopropylmalate dehydrogenases

Domain ID domain_id	d2d4vd_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.77 — Isocitrate/Isopropylmalate dehydrogenase-like
Superfamily Superfamily superfamily	c.77.1 — Isocitrate/Isopropylmalate dehydrogenase-like
Family Family family	c.77.1.1 — Dimeric isocitrate & isopropylmalate dehydrogenases

CATH v4.4 (4 domains)

Domain ID domain_id	2d4vA00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	718 — Isopropylmalate Dehydrogenase
Homologous superfamily homologous superfamily	10 — Isopropylmalate Dehydrogenase

Domain ID domain_id	2d4vB00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	718 — Isopropylmalate Dehydrogenase
Homologous superfamily homologous superfamily	10 — Isopropylmalate Dehydrogenase

Domain ID domain_id	2d4vC00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	718 — Isopropylmalate Dehydrogenase
Homologous superfamily homologous superfamily	10 — Isopropylmalate Dehydrogenase

Domain ID domain_id	2d4vD00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	718 — Isopropylmalate Dehydrogenase
Homologous superfamily homologous superfamily	10 — Isopropylmalate Dehydrogenase

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Unit-cell length a length_a	125.981 Å
Unit-cell length b length_b	125.981 Å
Unit-cell length c length_c	267.774 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	32

Space group space_group	P 43 21 2
Space-group number int_tables_number	96
Crystal system crystal_system	—

Resolution resolution	1.900 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	0.1805
R_work r_work	0.1793
R_free r_free	0.2026

Crystal structure of NAD dependent isocitrate dehydrogenase from Acidithiobacillus thiooxidans

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

isocitrate dehydrogenase

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

2d4v__assembly_1__model_1

2d4v__assembly_1__model_1 | I(q)

2d4v__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

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)

Crystal structure of NAD dependent isocitrate dehydrogenase from Acidithiobacillus thiooxidans

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

isocitrate dehydrogenase

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

2d4v__assembly_1__model_1

2d4v__assembly_1__model_1 | I(q)

2d4v__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

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)