1p7z

Crystal structure of the D181S variant of catalase HPII from E. coli

Method: X-RAY DIFFRACTION

▼

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

Catalase HPII

Escherichia coli

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	CATE_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–753； UniProt 1–753 Author chain B； PDBConstruct 1–753； UniProt 1–753 Author chain C； PDBConstruct 1–753； UniProt 1–753 Author chain D； PDBConstruct 1–753； UniProt 1–753

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	1p7z
Deposition date deposition_date	2003-05-06
Structure title title	Crystal structure of the D181S variant of catalase HPII from E. coli
Keywords keywords	catalase, beta barrel, channel, OXIDOREDUCTASE; OXIDOREDUCTASE
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.

1p7z__assembly_1__model_1

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

Download this curve (.dat)

1p7z__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1p7z__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	41.57 Å
Rg (electron density)	41.29 Å
Total Rg	41.88 Å
Atom count	23148
Residues	2908
Excluded volume	408730 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1p7z__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 HPII
Molecular weight formula_weight	84243.4 kDa
EC 编号 ec_number	1.11.1.6
Mutation mutation	D181S
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	25893

MSQHNEKNPHQHQSPLHDSSEAKPGMDSLAPEDGSHRPAAEPTPPGAQPTAPGSLKAPDTRNEKLNSLEDVRKGSENYALTTNQGVRIADDQNSLRAGSRGPTLLEDFILREKITHFDHERIPERIVHARGSAAHGYFQPYKSLSDITKADFLSDPNKITPVFVRFSTVQGGAGSADTVRSIRGFATKFYTEEGIFDLVGNNTPIFFIQDAHKFPDFVHAVKPEPHWAIPQGQSAHDTFWDYVSLQPETLHNVMWAMSDRGIPRSYRTMEGFGIHTFRLINAEGKATFVRFHWKPLAGKASLVWDEAQKLTGRDPDFHRRELWEAIEAGDFPEYELGFQLIPEEDEFKFDFDLLDPTKLIPEELVPVQRVGKMVLNRNPDNFFAENEQAAFHPGHIVPGLDFTNDPLLQGRLFSYTDTQISRLGGPNFHEIPINRPTCPYHNFQRDGMHRMGIDTNPANYEPNSINDNWPRETPPGPKRGGFESYQERVEGNKVRERSPSFGEYYSHPRLFWLSQTPFEQRHIVDGFSFELSKVVRPYIRERVVDQLAHIDLTLAQAVAKNLGIELTDDQLNITPPPDVNGLKKDPSLSLYAIPDGDVKGRVVAILLNDEVRSADLLAILKALKAKGVHAKLLYSRMGEVTADDGTVLPIAATFAGAPSLTVDAVIVPCGNIADIADNGDANYYLMEAYKHLKPIALAGDARKFKATIKIADQGEEGIVEADSADGSFMDELLTLMAAHRVWSRIPKIDKIPA

Source Source

Source organism organism	Escherichia coli
NCBI taxonomy ID ncbi_taxonomy_id	562
Host organism host_organism	Escherichia coli

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	4

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	2733

▼

6. Fold Classification (SCOP + CATH) 20 domains

SCOP 2.08 (8 domains)

Domain ID domain_id	d1p7za1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.23 — Flavodoxin-like
Superfamily Superfamily superfamily	c.23.16 — Class I glutamine amidotransferase-like
Family Family family	c.23.16.3 — Catalase, C-terminal domain

Domain ID domain_id	d1p7za2
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

Domain ID domain_id	d1p7zb1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.23 — Flavodoxin-like
Superfamily Superfamily superfamily	c.23.16 — Class I glutamine amidotransferase-like
Family Family family	c.23.16.3 — Catalase, C-terminal domain

Domain ID domain_id	d1p7zb2
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

Domain ID domain_id	d1p7zc1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.23 — Flavodoxin-like
Superfamily Superfamily superfamily	c.23.16 — Class I glutamine amidotransferase-like
Family Family family	c.23.16.3 — Catalase, C-terminal domain

Domain ID domain_id	d1p7zc2
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

Domain ID domain_id	d1p7zd1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.23 — Flavodoxin-like
Superfamily Superfamily superfamily	c.23.16 — Class I glutamine amidotransferase-like
Family Family family	c.23.16.3 — Catalase, C-terminal domain

Domain ID domain_id	d1p7zd2
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 (12 domains)

Domain ID domain_id	1p7zA01
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

Domain ID domain_id	1p7zA02
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	1370 — Hemocyanin, N-terminal domain
Homologous superfamily homologous superfamily	20 — Catalase, four-helical domain

Domain ID domain_id	1p7zA03
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	880 — Class I glutamine amidotransferase (GATase) domain

Domain ID domain_id	1p7zB01
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

Domain ID domain_id	1p7zB02
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	1370 — Hemocyanin, N-terminal domain
Homologous superfamily homologous superfamily	20 — Catalase, four-helical domain

Domain ID domain_id	1p7zB03
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	880 — Class I glutamine amidotransferase (GATase) domain

Domain ID domain_id	1p7zC01
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

Domain ID domain_id	1p7zC02
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	1370 — Hemocyanin, N-terminal domain
Homologous superfamily homologous superfamily	20 — Catalase, four-helical domain

Domain ID domain_id	1p7zC03
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	880 — Class I glutamine amidotransferase (GATase) domain

Domain ID domain_id	1p7zD01
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

Domain ID domain_id	1p7zD02
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	1370 — Hemocyanin, N-terminal domain
Homologous superfamily homologous superfamily	20 — Catalase, four-helical domain

Domain ID domain_id	1p7zD03
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	880 — Class I glutamine amidotransferase (GATase) domain

▶

Unit-cell length a length_a	93.340 Å
Unit-cell length b length_b	132.880 Å
Unit-cell length c length_c	121.450 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	109.40 °
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	2.210 Å
Low-resolution limit resolution_low	29.800 Å
R factor r_factor	0.1480
R_work r_work	0.1440
R_free r_free	0.2110

Crystal structure of the D181S variant of catalase HPII from E. coli

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

Catalase HPII

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

1p7z__assembly_1__model_1

1p7z__assembly_1__model_1 | I(q)

1p7z__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

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 20 domains

SCOP 2.08 (8 domains)

CATH v4.4 (12 domains)

7. Citations (1)

Crystal structure of the D181S variant of catalase HPII from E. coli

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

Catalase HPII

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

1p7z__assembly_1__model_1

1p7z__assembly_1__model_1 | I(q)

1p7z__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

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 20 domains

SCOP 2.08 (8 domains)

CATH v4.4 (12 domains)

7. Citations (1)