1pq3

Human Arginase II: Crystal Structure and Physiological Role in Male and Female Sexual Arousal

Method: X-RAY DIFFRACTION

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

Arginase II, mitochondrial precursor

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 3	SULFATE ION × 7 MANGANESE (II) ION × 6 CHLORIDE ION × 2 S-2-(BORONOETHYL)-L-CYSTEINE × 3 water × 3	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 3	SULFATE ION × 8 MANGANESE (II) ION × 6 CHLORIDE ION × 3 S-2-(BORONOETHYL)-L-CYSTEINE × 3 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ARGI2_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–306； UniProt 24–329 Author chain B； PDBConstruct 1–306； UniProt 24–329 Author chain C； PDBConstruct 1–306； UniProt 24–329 Author chain D； PDBConstruct 1–306； UniProt 24–329 Author chain E； PDBConstruct 1–306； UniProt 24–329 Author chain F； PDBConstruct 1–306； UniProt 24–329

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	1pq3
Deposition date deposition_date	2003-06-17
Structure title title	Human Arginase II: Crystal Structure and Physiological Role in Male and Female Sexual Arousal
Keywords keywords	BIOSYNTHETIC PROTEIN, HYDROLASE; HYDROLASE
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.

1pq3__assembly_1__model_1

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

Download this curve (.dat)

1pq3__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1pq3__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	30.88 Å
Rg (electron density)	30.06 Å
Total Rg	30.66 Å
Atom count	7093
Residues	918
Excluded volume	125880 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1pq3__assembly_1__model_1`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1pq3__assembly_2__model_1`	trimeric （3）	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 (6)

Entity 1 Entity 1 polymer

Description description	Arginase II, mitochondrial precursor
Molecular weight formula_weight	33231.7 kDa
EC 编号 ec_number	3.5.3.1
Source method src_method	man
Copy count entity_count	6

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F
Atom count atom_count	14599

HSVAVIGAPFSQGQKRKGVEHGPAAIREAGLMKRLSSLGCHLKDFGDLSFTPVPKDDLYNNLIVNPRSVGLANQELAEVVSRAVSDGYSCVTLGGDHSLAIGTISGHARHCPDLCVVWVDAHADINTPLTTSSGNLHGQPVSFLLRELQDKVPQLPGFSWIKPCISSASIVYIGLRDVDPPEHFILKNYDIQYFSMRDIDRLGIQKVMERTFDLLIGKRQRPIHLSFDIDAFDPTLAPATGTPVVGGLTYREGMYIAEEIHNTGLLSALDLVEVNPQLATSEEEAKTTANLAVDVIASSFGQTREG

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 BL21(DE3)

Entity 2 Entity 2 non-polymer

Description description	SULFATE ION
Molecular weight formula_weight	96.1 kDa
Source method src_method	syn
Copy count entity_count	15

Entity 3 Entity 3 non-polymer

Description description	MANGANESE (II) ION
Molecular weight formula_weight	54.9 kDa
Source method src_method	syn
Copy count entity_count	12

Entity 4 Entity 4 non-polymer

Description description	CHLORIDE ION
Molecular weight formula_weight	35.5 kDa
Source method src_method	syn
Copy count entity_count	5

Entity 5 Entity 5 non-polymer

Description description	S-2-(BORONOETHYL)-L-CYSTEINE
Molecular weight formula_weight	210.0 kDa
Source method src_method	syn
Copy count entity_count	6

Entity 6 Entity 6 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	407

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6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d1pq3a_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.42 — Arginase/deacetylase
Superfamily Superfamily superfamily	c.42.1 — Arginase/deacetylase
Family Family family	c.42.1.1 — Arginase-like amidino hydrolases

Domain ID domain_id	d1pq3b_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.42 — Arginase/deacetylase
Superfamily Superfamily superfamily	c.42.1 — Arginase/deacetylase
Family Family family	c.42.1.1 — Arginase-like amidino hydrolases

Domain ID domain_id	d1pq3c_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.42 — Arginase/deacetylase
Superfamily Superfamily superfamily	c.42.1 — Arginase/deacetylase
Family Family family	c.42.1.1 — Arginase-like amidino hydrolases

Domain ID domain_id	d1pq3d_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.42 — Arginase/deacetylase
Superfamily Superfamily superfamily	c.42.1 — Arginase/deacetylase
Family Family family	c.42.1.1 — Arginase-like amidino hydrolases

Domain ID domain_id	d1pq3e_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.42 — Arginase/deacetylase
Superfamily Superfamily superfamily	c.42.1 — Arginase/deacetylase
Family Family family	c.42.1.1 — Arginase-like amidino hydrolases

Domain ID domain_id	d1pq3f_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.42 — Arginase/deacetylase
Superfamily Superfamily superfamily	c.42.1 — Arginase/deacetylase
Family Family family	c.42.1.1 — Arginase-like amidino hydrolases

CATH v4.4 (6 domains)

Domain ID domain_id	1pq3A00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	800 — Arginase; Chain A
Homologous superfamily homologous superfamily	10 — Ureohydrolase domain

Domain ID domain_id	1pq3B00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	800 — Arginase; Chain A
Homologous superfamily homologous superfamily	10 — Ureohydrolase domain

Domain ID domain_id	1pq3C00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	800 — Arginase; Chain A
Homologous superfamily homologous superfamily	10 — Ureohydrolase domain

Domain ID domain_id	1pq3D00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	800 — Arginase; Chain A
Homologous superfamily homologous superfamily	10 — Ureohydrolase domain

Domain ID domain_id	1pq3E00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	800 — Arginase; Chain A
Homologous superfamily homologous superfamily	10 — Ureohydrolase domain

Domain ID domain_id	1pq3F00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	800 — Arginase; Chain A
Homologous superfamily homologous superfamily	10 — Ureohydrolase domain

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Unit-cell length a length_a	142.994 Å
Unit-cell length b length_b	142.994 Å
Unit-cell length c length_c	127.328 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	18

Space group space_group	P 32
Space-group number int_tables_number	145
Crystal system crystal_system	—

Resolution resolution	2.700 Å
Low-resolution limit resolution_low	30.000 Å
R factor r_factor	0.2270
R_work r_work	0.2270
R_free r_free	0.2470

Human Arginase II: Crystal Structure and Physiological Role in Male and Female Sexual Arousal

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

Arginase II, mitochondrial precursor

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

1pq3__assembly_1__model_1

1pq3__assembly_1__model_1 | I(q)

1pq3__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (6)

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 water

6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (1)

Human Arginase II: Crystal Structure and Physiological Role in Male and Female Sexual Arousal

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

Arginase II, mitochondrial precursor

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

1pq3__assembly_1__model_1

1pq3__assembly_1__model_1 | I(q)

1pq3__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (6)

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 water

6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (1)