1dqa

COMPLEX OF THE CATALYTIC PORTION OF HUMAN HMG-COA REDUCTASE WITH HMG, COA, AND NADP+

Method: X-RAY DIFFRACTION

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

PROTEIN (HMG-COA REDUCTASE)

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	COENZYME A × 4 3-HYDROXY-3-METHYL-GLUTARIC ACID × 4 NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 4 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	HMDH_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–467； UniProt 422–888 Author chain B； PDBConstruct 1–467； UniProt 422–888 Author chain C； PDBConstruct 1–467； UniProt 422–888 Author chain D； PDBConstruct 1–467； UniProt 422–888

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	1dqa
Deposition date deposition_date	1999-12-30
Structure title title	COMPLEX OF THE CATALYTIC PORTION OF HUMAN HMG-COA REDUCTASE WITH HMG, COA, AND NADP+
Keywords keywords	OXIDOREDUCTASE, CHOLESTEROL BIOSYNTHESIS, HMG-COA, NADPH; 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.

1dqa__assembly_1__model_1

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

Download this curve (.dat)

1dqa__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1dqa__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	33.35 Å
Rg (electron density)	32.76 Å
Total Rg	33.30 Å
Atom count	12438
Residues	1614
Excluded volume	220820 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1dqa__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 (5)

Entity 1 Entity 1 polymer

Description description	PROTEIN (HMG-COA REDUCTASE)
Molecular weight formula_weight	50021.5 kDa
EC 编号 ec_number	1.1.1.34
Mutation mutation	YES
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	12909

GAMASSVLVTQEPEIELPREPRPNEECLQILGNAEKGAKFLSDAEIIQLVNAKHIPAYKLETLIETHERGVSIRRQLLSKKLSEPSSLQYLPYRDYNYSLVMGACCENVIGYMPIPVGVAGPLCLDEKEFQVPMATTEGCLVASTNRGCRAIGLGGGASSRVLADGMTRGPVVRLPRACDSAEVKAWLETSEGFAVIKEAFDSTSRFARLQKLHTSIAGRNLYIRFQSRSGDAMGMNMISKGTEKALSKLHEYFPEMQILAVSGNYCTDKKPAAINWIEGRGKSVVCEAVIPAKVVREVLKTTTEAMIEVNINKNLVGSAMAGSIGGYNAHAANIVTAIYIACGQDAAQNVGSSNCITLMEASGPTNEDLYISCTMPSIEIGTVGGGTNLLPQQACLQMLGVQGACKDNPGENARQLARIVCGTVMAGELSLMAALAAGHLVKSHMIHNRSKINLQDLQGACTKKTA

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	COENZYME A
Molecular weight formula_weight	767.5 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 3 Entity 3 non-polymer

Description description	3-HYDROXY-3-METHYL-GLUTARIC ACID
Molecular weight formula_weight	162.1 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 4 Entity 4 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	4

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	471

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6. Fold Classification (SCOP + CATH) 20 domains

SCOP 2.08 (8 domains)

Domain ID domain_id	d1dqaa1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.58 — Ferredoxin-like
Superfamily Superfamily superfamily	d.58.20 — NAD-binding domain of HMG-CoA reductase
Family Family family	d.58.20.1 — NAD-binding domain of HMG-CoA reductase

Domain ID domain_id	d1dqaa4
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.179 — Substrate-binding domain of HMG-CoA reductase
Superfamily Superfamily superfamily	d.179.1 — Substrate-binding domain of HMG-CoA reductase
Family Family family	d.179.1.1 — Substrate-binding domain of HMG-CoA reductase

Domain ID domain_id	d1dqab1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.58 — Ferredoxin-like
Superfamily Superfamily superfamily	d.58.20 — NAD-binding domain of HMG-CoA reductase
Family Family family	d.58.20.1 — NAD-binding domain of HMG-CoA reductase

Domain ID domain_id	d1dqab4
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.179 — Substrate-binding domain of HMG-CoA reductase
Superfamily Superfamily superfamily	d.179.1 — Substrate-binding domain of HMG-CoA reductase
Family Family family	d.179.1.1 — Substrate-binding domain of HMG-CoA reductase

Domain ID domain_id	d1dqac1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.58 — Ferredoxin-like
Superfamily Superfamily superfamily	d.58.20 — NAD-binding domain of HMG-CoA reductase
Family Family family	d.58.20.1 — NAD-binding domain of HMG-CoA reductase

Domain ID domain_id	d1dqac4
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.179 — Substrate-binding domain of HMG-CoA reductase
Superfamily Superfamily superfamily	d.179.1 — Substrate-binding domain of HMG-CoA reductase
Family Family family	d.179.1.1 — Substrate-binding domain of HMG-CoA reductase

Domain ID domain_id	d1dqad1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.58 — Ferredoxin-like
Superfamily Superfamily superfamily	d.58.20 — NAD-binding domain of HMG-CoA reductase
Family Family family	d.58.20.1 — NAD-binding domain of HMG-CoA reductase

Domain ID domain_id	d1dqad4
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.179 — Substrate-binding domain of HMG-CoA reductase
Superfamily Superfamily superfamily	d.179.1 — Substrate-binding domain of HMG-CoA reductase
Family Family family	d.179.1.1 — Substrate-binding domain of HMG-CoA reductase

CATH v4.4 (12 domains)

Domain ID domain_id	1dqaA01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	3270 — HMGR, N-terminal domain
Homologous superfamily homologous superfamily	10 — HMGR, N-terminal domain

Domain ID domain_id	1dqaA02
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	770 — 3-hydroxy-3-methylglutaryl-coenzyme A Reductase; Chain A, domain 2
Homologous superfamily homologous superfamily	10 — 3-hydroxy-3-methylglutaryl-coenzyme A Reductase; Chain A, domain 2

Domain ID domain_id	1dqaA03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	420 — Hydroxymethylglutaryl-CoA reductase, class I/II, NAD/NADP-binding domain

Domain ID domain_id	1dqaB01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	3270 — HMGR, N-terminal domain
Homologous superfamily homologous superfamily	10 — HMGR, N-terminal domain

Domain ID domain_id	1dqaB02
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	770 — 3-hydroxy-3-methylglutaryl-coenzyme A Reductase; Chain A, domain 2
Homologous superfamily homologous superfamily	10 — 3-hydroxy-3-methylglutaryl-coenzyme A Reductase; Chain A, domain 2

Domain ID domain_id	1dqaB03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	420 — Hydroxymethylglutaryl-CoA reductase, class I/II, NAD/NADP-binding domain

Domain ID domain_id	1dqaC01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	3270 — HMGR, N-terminal domain
Homologous superfamily homologous superfamily	10 — HMGR, N-terminal domain

Domain ID domain_id	1dqaC02
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	770 — 3-hydroxy-3-methylglutaryl-coenzyme A Reductase; Chain A, domain 2
Homologous superfamily homologous superfamily	10 — 3-hydroxy-3-methylglutaryl-coenzyme A Reductase; Chain A, domain 2

Domain ID domain_id	1dqaC03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	420 — Hydroxymethylglutaryl-CoA reductase, class I/II, NAD/NADP-binding domain

Domain ID domain_id	1dqaD01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	3270 — HMGR, N-terminal domain
Homologous superfamily homologous superfamily	10 — HMGR, N-terminal domain

Domain ID domain_id	1dqaD02
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	770 — 3-hydroxy-3-methylglutaryl-coenzyme A Reductase; Chain A, domain 2
Homologous superfamily homologous superfamily	10 — 3-hydroxy-3-methylglutaryl-coenzyme A Reductase; Chain A, domain 2

Domain ID domain_id	1dqaD03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	420 — Hydroxymethylglutaryl-CoA reductase, class I/II, NAD/NADP-binding domain

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Unit-cell length a length_a	73.918 Å
Unit-cell length b length_b	172.630 Å
Unit-cell length c length_c	73.991 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	117.50 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	2.000 Å
Low-resolution limit resolution_low	44.000 Å
R factor r_factor	0.1680
R_work r_work	0.1680
R_free r_free	0.1970

COMPLEX OF THE CATALYTIC PORTION OF HUMAN HMG-COA REDUCTASE WITH HMG, COA, AND NADP+

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

PROTEIN (HMG-COA REDUCTASE)

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

1dqa__assembly_1__model_1

1dqa__assembly_1__model_1 | I(q)

1dqa__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 (5)

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 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 20 domains

SCOP 2.08 (8 domains)

CATH v4.4 (12 domains)

7. Citations (1)

COMPLEX OF THE CATALYTIC PORTION OF HUMAN HMG-COA REDUCTASE WITH HMG, COA, AND NADP+

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

PROTEIN (HMG-COA REDUCTASE)

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

1dqa__assembly_1__model_1

1dqa__assembly_1__model_1 | I(q)

1dqa__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 (5)

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 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 20 domains

SCOP 2.08 (8 domains)

CATH v4.4 (12 domains)

7. Citations (1)