SAXSdb — 2cag

▼

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

CATALASE COMPOUND II

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 4	PROTOPORPHYRIN IX CONTAINING FE × 4 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CATA_PROMI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–484； UniProt 1–484

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.

▼

2. Structure Basics 2. Structure Basics

Entry ID entry_id	2cag
Deposition date deposition_date	1996-06-12
Structure title title	CATALASE COMPOUND II
Keywords keywords	OXIDOREDUCTASE (H2O2 ACCEPTOR), PEROXIDASE, IRON, HEME, HYDROGEN PEROXIDE, NADP; OXIDOREDUCTASE (H2O2 ACCEPTOR)
Experimental Method method	X-RAY DIFFRACTION

▼

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.

2cag__assembly_1__model_1

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

Download this curve (.dat)

2cag__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2cag__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	36.42 Å
Rg (electron density)	35.81 Å
Total Rg	36.42 Å
Atom count	15616
Residues	1896
Excluded volume	274300 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2cag__assembly_1__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download

▶

4. Crystallography and Experiment 4. Crystallography & Experiment

▶

5. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Description description	CATALASE COMPOUND II
Molecular weight formula_weight	55726.3 kDa
EC 编号 ec_number	1.11.1.6
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	3974

MEKKKLTTAAGAPVVDNNNVITAGPRGPMLLQDVWFLEKLAHFDREVIPERRMHAKGSGAFGTFTVTHDITKYTRAKIFSEVGKKTEMFARFSTVAGERGAADAERDIRGFALKFYTEEGNWDMVGNNTPVFYLRDPLKFPDLNHIVKRDPRTNMRNMAYKWDFFSHLPESLHQLTIDMSDRGLPLSYRFVHGFGSHTYSFINKDNERFWVKFHFRCQQGIKNLMDDEAEALVGKDRESSQRDLFEAIERGDYPRWKLQIQIMPEKEASTVPYNPFDLTKVWPHADYPLMDVGYFELNRNPDNYFSDVEQAAFSPANIVPGISFSPDKMLQGRLFSYGDAHRYRLGVNHHQIPVNAPKCPFHNYHRDGAMRVDGNSGNGITYEPNSGGVFQEQPDFKEPPLSIEGAADHWNHREDEDYFSQPRALYELLSDDEHQRMFARIAGELSQASKETQQRQIDLFTKVHPEYGAGVEKAIKVLEGKDAK

Entity 2 Entity 2 non-polymer

Description description	PROTOPORPHYRIN IX CONTAINING FE
Molecular weight formula_weight	616.5 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	70

▼

6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_id	d2caga_
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.5 — Heme-dependent catalase-like
Superfamily Superfamily superfamily	e.5.1 — Heme-dependent catalase-like
Family Family family	e.5.1.1 — Heme-dependent catalases

CATH v4.4 (1 domains)

Domain ID domain_id	2cagA00
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	180 — Catalase HpII, Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Catalase core domain

▶

Unit-cell length a length_a	111.840 Å
Unit-cell length b length_b	111.840 Å
Unit-cell length c length_c	249.910 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	12

Space group space_group	P 62 2 2
Space-group number int_tables_number	180
Crystal system crystal_system	—

Resolution resolution	2.700 Å
Low-resolution limit resolution_low	15.000 Å
R factor r_factor	0.1790
R_work r_work	0.1790
R_free r_free	0.2410

CATALASE COMPOUND II

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

CATALASE COMPOUND II

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

2cag__assembly_1__model_1

2cag__assembly_1__model_1 | I(q)

2cag__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (3)

CATALASE COMPOUND II

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

CATALASE COMPOUND II

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

2cag__assembly_1__model_1

2cag__assembly_1__model_1 | I(q)

2cag__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (3)