SAXSdb — 1apx

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

CYTOSOLIC ASCORBATE PEROXIDASE

Pisum sativum

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	POTASSIUM ION × 2 PROTOPORPHYRIN IX CONTAINING FE × 2 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	POTASSIUM ION × 2 PROTOPORPHYRIN IX CONTAINING FE × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	APX1_PEA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–249； UniProt 1–249 Author chain B； PDBConstruct 1–249； UniProt 1–249 Author chain C； PDBConstruct 1–249； UniProt 1–249 Author chain D； PDBConstruct 1–249； UniProt 1–249

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	1apx
Deposition date deposition_date	1995-02-01
Structure title title	CRYSTAL STRUCTURE OF RECOMBINANT ASCORBATE PEROXIDASE
Keywords keywords	PEROXIDASE; PEROXIDASE
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.

1apx__assembly_1__model_1

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

Download this curve (.dat)

1apx__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1apx__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	25.56 Å
Rg (electron density)	24.39 Å
Total Rg	25.26 Å
Atom count	3918
Residues	498
Excluded volume	69881 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1apx__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1apx__assembly_2__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 (4)

Entity 1 Entity 1 polymer

Description description	CYTOSOLIC ASCORBATE PEROXIDASE
Molecular weight formula_weight	27097.6 kDa
EC 编号 ec_number	1.11.1.11
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	8481

GKSYPTVSPDYQKAIEKAKRKLRGFIAEKKCAPLILRLAWHSAGTFDSKTKTGGPFGTIKHQAELAHGANNGLDIAVRLLEPIKEQFPIVSYADFYQLAGVVAVEITGGPEVPFHPGREDKPEPPPEGRLPDATKGSDHLRDVFGKAMGLSDQDIVALSGGHTIGAAHKERSGFEGPWTSNPLIFDNSYFTELLTGEKDGLLQLPSDKALLTDSVFRPLVEKYAADEDVFFADYAEAHLKLSELGFAEA

Source Source

Source organism organism	Pisum sativum
Common name common_name	pea
NCBI taxonomy ID ncbi_taxonomy_id	3888
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	POTASSIUM ION
Molecular weight formula_weight	39.1 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 3 Entity 3 non-polymer

Description description	PROTOPORPHYRIN IX CONTAINING FE
Molecular weight formula_weight	616.5 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	645

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6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d1apxa_
Class class	a — All alpha proteins
Fold Fold fold	a.93 — Heme-dependent peroxidases
Superfamily Superfamily superfamily	a.93.1 — Heme-dependent peroxidases
Family Family family	a.93.1.1 — CCP-like

Domain ID domain_id	d1apxb_
Class class	a — All alpha proteins
Fold Fold fold	a.93 — Heme-dependent peroxidases
Superfamily Superfamily superfamily	a.93.1 — Heme-dependent peroxidases
Family Family family	a.93.1.1 — CCP-like

Domain ID domain_id	d1apxc_
Class class	a — All alpha proteins
Fold Fold fold	a.93 — Heme-dependent peroxidases
Superfamily Superfamily superfamily	a.93.1 — Heme-dependent peroxidases
Family Family family	a.93.1.1 — CCP-like

Domain ID domain_id	d1apxd_
Class class	a — All alpha proteins
Fold Fold fold	a.93 — Heme-dependent peroxidases
Superfamily Superfamily superfamily	a.93.1 — Heme-dependent peroxidases
Family Family family	a.93.1.1 — CCP-like

CATH v4.4 (8 domains)

Domain ID domain_id	1apxA01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	520 — Peroxidase; domain 1
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	1apxA02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	420 — Peroxidase; domain 2
Homologous superfamily homologous superfamily	10 — Peroxidase, domain 2

Domain ID domain_id	1apxB01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	520 — Peroxidase; domain 1
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	1apxB02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	420 — Peroxidase; domain 2
Homologous superfamily homologous superfamily	10 — Peroxidase, domain 2

Domain ID domain_id	1apxC01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	520 — Peroxidase; domain 1
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	1apxC02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	420 — Peroxidase; domain 2
Homologous superfamily homologous superfamily	10 — Peroxidase, domain 2

Domain ID domain_id	1apxD01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	520 — Peroxidase; domain 1
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	1apxD02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	420 — Peroxidase; domain 2
Homologous superfamily homologous superfamily	10 — Peroxidase, domain 2

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Unit-cell length a length_a	132.400 Å
Unit-cell length b length_b	53.000 Å
Unit-cell length c length_c	170.600 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	107.10 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	16

Space group space_group	C 1 2 1
Space-group number int_tables_number	5
Crystal system crystal_system	—

Resolution resolution	2.200 Å
Low-resolution limit resolution_low	8.000 Å
R factor r_factor	0.1930
R_work r_work	0.1930
R_free r_free	—

CRYSTAL STRUCTURE OF RECOMBINANT ASCORBATE PEROXIDASE

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

CYTOSOLIC ASCORBATE PEROXIDASE

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

1apx__assembly_1__model_1

1apx__assembly_1__model_1 | I(q)

1apx__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 (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) 12 domains

SCOP 2.08 (4 domains)

CATH v4.4 (8 domains)

7. Citations (2)

CRYSTAL STRUCTURE OF RECOMBINANT ASCORBATE PEROXIDASE

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

CYTOSOLIC ASCORBATE PEROXIDASE

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

1apx__assembly_1__model_1

1apx__assembly_1__model_1 | I(q)

1apx__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 (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) 12 domains

SCOP 2.08 (4 domains)

CATH v4.4 (8 domains)

7. Citations (2)