1ivh

STRUCTURE OF HUMAN ISOVALERYL-COA DEHYDROGENASE AT 2.6 ANGSTROMS RESOLUTION: STRUCTURAL BASIS FOR SUBSTRATE SPECIFICITY

Method: X-RAY DIFFRACTION

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

ISOVALERYL-COA DEHYDROGENASE

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 4	FLAVIN-ADENINE DINUCLEOTIDE × 4 COENZYME A PERSULFIDE × 4 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	IVD_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–394； UniProt 30–423 Author chain B； PDBConstruct 1–394； UniProt 30–423 Author chain C； PDBConstruct 1–394； UniProt 30–423 Author chain D； PDBConstruct 1–394； UniProt 30–423

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	1ivh
Deposition date deposition_date	1997-05-15
Structure title title	STRUCTURE OF HUMAN ISOVALERYL-COA DEHYDROGENASE AT 2.6 ANGSTROMS RESOLUTION: STRUCTURAL BASIS FOR SUBSTRATE SPECIFICITY
Keywords keywords	OXIDOREDUCTASE, ACYL-COA DEHYDROGENASE, FLAVOPROTEIN, ISOVALERYL-COA, ISOVALERIC ACIDEMIA; 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.

1ivh__assembly_1__model_1

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

Download this curve (.dat)

1ivh__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1ivh__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	34.57 Å
Rg (electron density)	34.10 Å
Total Rg	34.47 Å
Atom count	12248
Residues	1548
Excluded volume	217300 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1ivh__assembly_1__model_1`	tetrameric （4）	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	ISOVALERYL-COA DEHYDROGENASE
Molecular weight formula_weight	43120.5 kDa
EC 编号 ec_number	1.3.99.10
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	12463

HSLLPVDDAINGLSEEQRQLRQTMAKFLQEHLAPKAQEIDRSNEFKNLREFWKQLGNLGVLGITAPVQYGGSGLGYLEHVLVMEEISRASGAVGLSYGAHSNLCINQLVRNGNEAQKEKYLPKLISGEYIGALAMSEPNAGSDVVSMKLKAEKKGNHYILNGNKFWITNGPDADVLIVYAKTDLAAVPASRGITAFIVEKGMPGFSTSKKLDKLGMRGSNTCELIFEDCKIPAANILGHENKGVYVLMSGLDLERLVLAGGPLGLMQAVLDHTIPYLHVREAFGQKIGHFQLMQGKMADMYTRLMACRQYVYNVAKACDEGHCTAKDCAGVILYSAECATQVALDGIQCFGGNGYINDFPMGRFLRDAKLYEIGAGTSEVRRLVIGRAFNADFH

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	FLAVIN-ADENINE DINUCLEOTIDE
Molecular weight formula_weight	785.5 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 3 Entity 3 non-polymer

Description description	COENZYME A PERSULFIDE
Molecular weight formula_weight	799.6 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	215

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6. Fold Classification (SCOP + CATH) 20 domains

SCOP 2.08 (8 domains)

Domain ID domain_id	d1ivha1
Class class	a — All alpha proteins
Fold Fold fold	a.29 — Bromodomain-like
Superfamily Superfamily superfamily	a.29.3 — Acyl-CoA dehydrogenase C-terminal domain-like
Family Family family	a.29.3.1 — Medium chain acyl-CoA dehydrogenase-like, C-terminal domain

Domain ID domain_id	d1ivha2
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.6 — Acyl-CoA dehydrogenase NM domain-like
Superfamily Superfamily superfamily	e.6.1 — Acyl-CoA dehydrogenase NM domain-like
Family Family family	e.6.1.1 — Medium chain acyl-CoA dehydrogenase, NM (N-terminal and middle) domains

Domain ID domain_id	d1ivhb1
Class class	a — All alpha proteins
Fold Fold fold	a.29 — Bromodomain-like
Superfamily Superfamily superfamily	a.29.3 — Acyl-CoA dehydrogenase C-terminal domain-like
Family Family family	a.29.3.1 — Medium chain acyl-CoA dehydrogenase-like, C-terminal domain

Domain ID domain_id	d1ivhb2
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.6 — Acyl-CoA dehydrogenase NM domain-like
Superfamily Superfamily superfamily	e.6.1 — Acyl-CoA dehydrogenase NM domain-like
Family Family family	e.6.1.1 — Medium chain acyl-CoA dehydrogenase, NM (N-terminal and middle) domains

Domain ID domain_id	d1ivhc1
Class class	a — All alpha proteins
Fold Fold fold	a.29 — Bromodomain-like
Superfamily Superfamily superfamily	a.29.3 — Acyl-CoA dehydrogenase C-terminal domain-like
Family Family family	a.29.3.1 — Medium chain acyl-CoA dehydrogenase-like, C-terminal domain

Domain ID domain_id	d1ivhc2
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.6 — Acyl-CoA dehydrogenase NM domain-like
Superfamily Superfamily superfamily	e.6.1 — Acyl-CoA dehydrogenase NM domain-like
Family Family family	e.6.1.1 — Medium chain acyl-CoA dehydrogenase, NM (N-terminal and middle) domains

Domain ID domain_id	d1ivhd1
Class class	a — All alpha proteins
Fold Fold fold	a.29 — Bromodomain-like
Superfamily Superfamily superfamily	a.29.3 — Acyl-CoA dehydrogenase C-terminal domain-like
Family Family family	a.29.3.1 — Medium chain acyl-CoA dehydrogenase-like, C-terminal domain

Domain ID domain_id	d1ivhd2
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.6 — Acyl-CoA dehydrogenase NM domain-like
Superfamily Superfamily superfamily	e.6.1 — Acyl-CoA dehydrogenase NM domain-like
Family Family family	e.6.1.1 — Medium chain acyl-CoA dehydrogenase, NM (N-terminal and middle) domains

CATH v4.4 (12 domains)

Domain ID domain_id	1ivhA01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	540 — Butyryl-Coa Dehydrogenase, subunit A; domain 1
Homologous superfamily homologous superfamily	10 — Acyl-CoA dehydrogenase/oxidase, N-terminal domain

Domain ID domain_id	1ivhA02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	110 — Butyryl-CoA Dehydrogenase, subunit A; domain 2
Homologous superfamily homologous superfamily	10 — Butyryl-CoA Dehydrogenase, subunit A, domain 2

Domain ID domain_id	1ivhA03
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	140 — Butyryl-CoA Dehydrogenase, subunit A; domain 3
Homologous superfamily homologous superfamily	10 — Butyryl-CoA Dehydrogenase, subunit A, domain 3

Domain ID domain_id	1ivhB01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	540 — Butyryl-Coa Dehydrogenase, subunit A; domain 1
Homologous superfamily homologous superfamily	10 — Acyl-CoA dehydrogenase/oxidase, N-terminal domain

Domain ID domain_id	1ivhB02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	110 — Butyryl-CoA Dehydrogenase, subunit A; domain 2
Homologous superfamily homologous superfamily	10 — Butyryl-CoA Dehydrogenase, subunit A, domain 2

Domain ID domain_id	1ivhB03
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	140 — Butyryl-CoA Dehydrogenase, subunit A; domain 3
Homologous superfamily homologous superfamily	10 — Butyryl-CoA Dehydrogenase, subunit A, domain 3

Domain ID domain_id	1ivhC01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	540 — Butyryl-Coa Dehydrogenase, subunit A; domain 1
Homologous superfamily homologous superfamily	10 — Acyl-CoA dehydrogenase/oxidase, N-terminal domain

Domain ID domain_id	1ivhC02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	110 — Butyryl-CoA Dehydrogenase, subunit A; domain 2
Homologous superfamily homologous superfamily	10 — Butyryl-CoA Dehydrogenase, subunit A, domain 2

Domain ID domain_id	1ivhC03
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	140 — Butyryl-CoA Dehydrogenase, subunit A; domain 3
Homologous superfamily homologous superfamily	10 — Butyryl-CoA Dehydrogenase, subunit A, domain 3

Domain ID domain_id	1ivhD01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	540 — Butyryl-Coa Dehydrogenase, subunit A; domain 1
Homologous superfamily homologous superfamily	10 — Acyl-CoA dehydrogenase/oxidase, N-terminal domain

Domain ID domain_id	1ivhD02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	110 — Butyryl-CoA Dehydrogenase, subunit A; domain 2
Homologous superfamily homologous superfamily	10 — Butyryl-CoA Dehydrogenase, subunit A, domain 2

Domain ID domain_id	1ivhD03
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	140 — Butyryl-CoA Dehydrogenase, subunit A; domain 3
Homologous superfamily homologous superfamily	10 — Butyryl-CoA Dehydrogenase, subunit A, domain 3

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Unit-cell length a length_a	94.000 Å
Unit-cell length b length_b	97.700 Å
Unit-cell length c length_c	181.700 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	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	2.600 Å
Low-resolution limit resolution_low	10.000 Å
R factor r_factor	0.2070
R_work r_work	0.2070
R_free r_free	0.2880

STRUCTURE OF HUMAN ISOVALERYL-COA DEHYDROGENASE AT 2.6 ANGSTROMS RESOLUTION: STRUCTURAL BASIS FOR SUBSTRATE SPECIFICITY

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

ISOVALERYL-COA 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

1ivh__assembly_1__model_1

1ivh__assembly_1__model_1 | I(q)

1ivh__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) 20 domains

SCOP 2.08 (8 domains)

CATH v4.4 (12 domains)

7. Citations (1)

STRUCTURE OF HUMAN ISOVALERYL-COA DEHYDROGENASE AT 2.6 ANGSTROMS RESOLUTION: STRUCTURAL BASIS FOR SUBSTRATE SPECIFICITY

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

ISOVALERYL-COA 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

1ivh__assembly_1__model_1

1ivh__assembly_1__model_1 | I(q)

1ivh__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) 20 domains

SCOP 2.08 (8 domains)

CATH v4.4 (12 domains)

7. Citations (1)