SAXSdb — 3g1r

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

3-oxo-5-beta-steroid 4-dehydrogenase

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 1 water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 1 ;(4aR,4bS,6aS,7S,9aS,9bS,11aR)-N-tert-butyl-4a,6a-dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carboxamide ; × 1 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	AK1D1_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 21–346； UniProt 1–326 Author chain B； PDBConstruct 21–346； UniProt 1–326

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	3g1r
Deposition date deposition_date	2009-01-30
Structure title title	Crystal structure of human liver 5beta-reductase (AKR1D1) in complex with NADP and Finasteride. Resolution 1.70 A
Keywords keywords	;FINASTERIDE complex, Bile acid catabolism, Cytoplasm, Disease mutation, Intrahepatic cholestasis, Lipid metabolism, NADP, Oxidoreductase, Steroid metabolism ;; 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.

3g1r__assembly_2__model_1

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

Download this curve (.dat)

3g1r__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3g1r__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	20.08 Å
Rg (electron density)	18.87 Å
Total Rg	19.84 Å
Atom count	2702
Residues	325
Excluded volume	48177 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3g1r__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3g1r__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 (4)

Entity 1 Entity 1 polymer

Description description	3-oxo-5-beta-steroid 4-dehydrogenase
Molecular weight formula_weight	39599.3 kDa
EC 编号 ec_number	1.3.1.3
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	6140

MGSSHHHHHHSSGLVPRGSHMDLSAASHRIPLSDGNSIPIIGLGTYSEPKSTPKGACATSVKVAIDTGYRHIDGAYIYQNEHEVGEAIREKIAEGKVRREDIFYCGKLWATNHVPEMVRPTLERTLRVLQLDYVDLYIIEVPMAFKPGDEIYPRDENGKWLYHKSNLCATWEAMEACKDAGLVKSLGVSNFNRRQLELILNKPGLKHKPVSNQVECHPYFTQPKLLKFCQQHDIVITAYSPLGTSRNPIWVNVSSPPLLKDALLNSLGKRYNKTAAQIVLRFNIQRGVVVIPKSFNLERIKENFQIFDFSLTEEEMKDIEALNKNVRFVELLMWRDHPEYPFHDEY

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	NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
Molecular weight formula_weight	743.4 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 non-polymer

Description description	;(4aR,4bS,6aS,7S,9aS,9bS,11aR)-N-tert-butyl-4a,6a-dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carboxamide ;
Molecular weight formula_weight	372.5 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	754

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d3g1ra_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.7 — NAD(P)-linked oxidoreductase
Family Family family	c.1.7.1 — Aldo-keto reductases (NADP)

Domain ID domain_id	d3g1rb_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.7 — NAD(P)-linked oxidoreductase
Family Family family	c.1.7.1 — Aldo-keto reductases (NADP)

CATH v4.4 (2 domains)

Domain ID domain_id	3g1rA00
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	100 — NADP-dependent oxidoreductase domain

Domain ID domain_id	3g1rB00
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	100 — NADP-dependent oxidoreductase domain

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Unit-cell length a length_a	49.892 Å
Unit-cell length b length_b	109.877 Å
Unit-cell length c length_c	128.961 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	8

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	1.701 Å
Low-resolution limit resolution_low	24.337 Å
R factor r_factor	0.1770
R_work r_work	0.1750
R_free r_free	0.2050

Crystal structure of human liver 5beta-reductase (AKR1D1) in complex with NADP and Finasteride. Resolution 1.70 A

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

3-oxo-5-beta-steroid 4-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

3g1r__assembly_2__model_1

3g1r__assembly_2__model_1 | I(q)

3g1r__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 (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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Crystal structure of human liver 5beta-reductase (AKR1D1) in complex with NADP and Finasteride. Resolution 1.70 A

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

3-oxo-5-beta-steroid 4-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

3g1r__assembly_2__model_1

3g1r__assembly_2__model_1 | I(q)

3g1r__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 (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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)