1p6n

Bovine endothelial NOS heme domain with L-N(omega)-nitroarginine-(4R)-amino-L-proline amide bound

Method: X-RAY DIFFRACTION

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

Nitric-oxide synthase, endothelial

Bos taurus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	CACODYLATE ION × 2 ACETATE ION × 2 PROTOPORPHYRIN IX CONTAINING FE × 2 5,6,7,8-TETRAHYDROBIOPTERIN × 2 L-N(OMEGA)-NITROARGININE-(4R)-AMINO-L-PROLINE AMIDE × 2 ZINC ION × 1 GLYCEROL × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	NOS3_BOVIN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–417； UniProt 66–482 Author chain B； PDBConstruct 1–417； UniProt 66–482

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	1p6n
Deposition date deposition_date	2003-04-29
Structure title title	Bovine endothelial NOS heme domain with L-N(omega)-nitroarginine-(4R)-amino-L-proline amide bound
Keywords keywords	nitric oxide synthase, oxidoreductase, heme-enzyme; 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.

1p6n__assembly_1__model_1

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

Download this curve (.dat)

1p6n__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1p6n__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	29.82 Å
Rg (electron density)	28.99 Å
Total Rg	29.62 Å
Atom count	6634
Residues	810
Excluded volume	117360 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1p6n__assembly_1__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 (9)

Entity 1 Entity 1 polymer

Description description	Nitric-oxide synthase, endothelial
Molecular weight formula_weight	46983.2 kDa
EC 编号 ec_number	1.14.13.39
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	6921

GPKFPRVKNWELGSITYDTLCAQSQQDGPCTPRRCLGSLVLPRKLQTRPSPGPPPAEQLLSQARDFINQYYSSIKRSGSQAHEERLQEVEAEVASTGTYHLRESELVFGAKQAWRNAPRCVGRIQWGKLQVFDARDCSSAQEMFTYICNHIKYATNRGNLRSAITVFPQRAPGRGDFRIWNSQLVRYAGYRQQDGSVRGDPANVEITELCIQHGWTPGNGRFDVLPLLLQAPDEAPELFVLPPELVLEVPLEHPTLEWFAALGLRWYALPAVSNMLLEIGGLEFSAAPFSGWYMSTEIGTRNLCDPHRYNILEDVAVCMDLDTRTTSSLWKDKAAVEINLAVLHSFQLAKVTIVDHHAATVSFMKHLDNEQKARGGCPADWAWIVPPISGSLTPVFHQEMVNYILSPAFRYQPDPWK

Source Source

Source organism organism	Bos taurus
Common name common_name	cattle
NCBI taxonomy ID ncbi_taxonomy_id	9913
Host organism host_organism	Pichia pastoris

Entity 2 Entity 2 non-polymer

Description description	CACODYLATE ION
Molecular weight formula_weight	137.0 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 non-polymer

Description description	ACETATE ION
Molecular weight formula_weight	59.0 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 4 Entity 4 non-polymer

Description description	PROTOPORPHYRIN IX CONTAINING FE
Molecular weight formula_weight	616.5 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 5 Entity 5 non-polymer

Description description	5,6,7,8-TETRAHYDROBIOPTERIN
Molecular weight formula_weight	241.2 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 6 Entity 6 non-polymer

Description description	L-N(OMEGA)-NITROARGININE-(4R)-AMINO-L-PROLINE AMIDE
Molecular weight formula_weight	330.3 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 7 Entity 7 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 8 Entity 8 non-polymer

Description description	GLYCEROL
Molecular weight formula_weight	92.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 9 Entity 9 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	287

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6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1p6na_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.174 — Nitric oxide (NO) synthase oxygenase domain
Superfamily Superfamily superfamily	d.174.1 — Nitric oxide (NO) synthase oxygenase domain
Family Family family	d.174.1.1 — Nitric oxide (NO) synthase oxygenase domain

Domain ID domain_id	d1p6nb_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.174 — Nitric oxide (NO) synthase oxygenase domain
Superfamily Superfamily superfamily	d.174.1 — Nitric oxide (NO) synthase oxygenase domain
Family Family family	d.174.1.1 — Nitric oxide (NO) synthase oxygenase domain

CATH v4.4 (6 domains)

Domain ID domain_id	1p6nA01
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	340 — Nitric Oxide Synthase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Nitric Oxide Synthase; Chain A, domain 1

Domain ID domain_id	1p6nA02
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	440 — Nitric Oxide Synthase;Heme Domain; Chain A, domain 2
Homologous superfamily homologous superfamily	10 — Nitric Oxide Synthase;Heme Domain;Chain A domain 2

Domain ID domain_id	1p6nA03
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	1230 — Bovine Endothelial Nitric Oxide Synthase Heme Domain; Chain: A,domain 3
Homologous superfamily homologous superfamily	10 — Nitric Oxide Synthase; Chain A, domain 3

Domain ID domain_id	1p6nB01
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	340 — Nitric Oxide Synthase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Nitric Oxide Synthase; Chain A, domain 1

Domain ID domain_id	1p6nB02
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	440 — Nitric Oxide Synthase;Heme Domain; Chain A, domain 2
Homologous superfamily homologous superfamily	10 — Nitric Oxide Synthase;Heme Domain;Chain A domain 2

Domain ID domain_id	1p6nB03
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	1230 — Bovine Endothelial Nitric Oxide Synthase Heme Domain; Chain: A,domain 3
Homologous superfamily homologous superfamily	10 — Nitric Oxide Synthase; Chain A, domain 3

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Unit-cell length a length_a	57.669 Å
Unit-cell length b length_b	106.292 Å
Unit-cell length c length_c	156.524 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	2.500 Å
Low-resolution limit resolution_low	42.550 Å
R factor r_factor	0.2180
R_work r_work	0.2180
R_free r_free	0.2780

Bovine endothelial NOS heme domain with L-N(omega)-nitroarginine-(4R)-amino-L-proline amide bound

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

Nitric-oxide synthase, endothelial

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

1p6n__assembly_1__model_1

1p6n__assembly_1__model_1 | I(q)

1p6n__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 (9)

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 non-polymer

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 non-polymer

Entity 8 Entity 8 non-polymer

Entity 9 Entity 9 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (2 domains)

CATH v4.4 (6 domains)

7. Citations (3)

Bovine endothelial NOS heme domain with L-N(omega)-nitroarginine-(4R)-amino-L-proline amide bound

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

Nitric-oxide synthase, endothelial

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

1p6n__assembly_1__model_1

1p6n__assembly_1__model_1 | I(q)

1p6n__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 (9)

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 non-polymer

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 non-polymer

Entity 8 Entity 8 non-polymer

Entity 9 Entity 9 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (2 domains)

CATH v4.4 (6 domains)

7. Citations (3)