1iw8

Crystal Structure of a mutant of acid phosphatase from Escherichia blattae (G74D/I153T)

Method: X-RAY DIFFRACTION

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

acid phosphatase

Escherichia blattae

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 6	SULFATE ION × 6 water × 6	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q9S1A6_ESCBL
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–231； UniProt 19–249 Author chain B； PDBConstruct 1–231； UniProt 19–249 Author chain C； PDBConstruct 1–231； UniProt 19–249 Author chain D； PDBConstruct 1–231； UniProt 19–249 Author chain E； PDBConstruct 1–231； UniProt 19–249 Author chain F； PDBConstruct 1–231； UniProt 19–249

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	1iw8
Deposition date deposition_date	2002-04-22
Structure title title	Crystal Structure of a mutant of acid phosphatase from Escherichia blattae (G74D/I153T)
Keywords keywords	ALL ALPHA, 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.

1iw8__assembly_1__model_1

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

Download this curve (.dat)

1iw8__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1iw8__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	36.12 Å
Rg (electron density)	35.63 Å
Total Rg	36.04 Å
Atom count	9927
Residues	1298
Excluded volume	174390 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1iw8__assembly_1__model_1`	hexameric （6）	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 (3)

Entity 1 Entity 1 polymer

Description description	acid phosphatase
Molecular weight formula_weight	25079.1 kDa
EC 编号 ec_number	3.1.3.2
Mutation mutation	G74D, I153T
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	10241

LALVATGNDTTTKPDLYYLKNSEAINSLALLPPPPAVGSIAFLNDQAMYEQGRLLRNTERGKLAAEDANLSSGDVANAFSGAFGSPITEKDAPALHKLLTNMIEDAGDLATRSAKDHYMRIRPFAFYGVSTCNTTEQDKLSKNGSYPSGHTSTGWATALVLAEINPQRQNEILKRGYELGQSRVICGYHWQSDVDAARVVGSAVVATLHTNPAFQQQLQKAKAEFAQHQKK

Source Source

Source organism organism	Escherichia blattae
NCBI taxonomy ID ncbi_taxonomy_id	563
Host organism host_organism	Escherichia coli

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	6

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	314

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6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d1iw8a_
Class class	a — All alpha proteins
Fold Fold fold	a.111 — Acid phosphatase/Vanadium-dependent haloperoxidase
Superfamily Superfamily superfamily	a.111.1 — Acid phosphatase/Vanadium-dependent haloperoxidase
Family Family family	a.111.1.1 — Type 2 phosphatidic acid phosphatase, PAP2

Domain ID domain_id	d1iw8b_
Class class	a — All alpha proteins
Fold Fold fold	a.111 — Acid phosphatase/Vanadium-dependent haloperoxidase
Superfamily Superfamily superfamily	a.111.1 — Acid phosphatase/Vanadium-dependent haloperoxidase
Family Family family	a.111.1.1 — Type 2 phosphatidic acid phosphatase, PAP2

Domain ID domain_id	d1iw8c_
Class class	a — All alpha proteins
Fold Fold fold	a.111 — Acid phosphatase/Vanadium-dependent haloperoxidase
Superfamily Superfamily superfamily	a.111.1 — Acid phosphatase/Vanadium-dependent haloperoxidase
Family Family family	a.111.1.1 — Type 2 phosphatidic acid phosphatase, PAP2

Domain ID domain_id	d1iw8d_
Class class	a — All alpha proteins
Fold Fold fold	a.111 — Acid phosphatase/Vanadium-dependent haloperoxidase
Superfamily Superfamily superfamily	a.111.1 — Acid phosphatase/Vanadium-dependent haloperoxidase
Family Family family	a.111.1.1 — Type 2 phosphatidic acid phosphatase, PAP2

Domain ID domain_id	d1iw8e_
Class class	a — All alpha proteins
Fold Fold fold	a.111 — Acid phosphatase/Vanadium-dependent haloperoxidase
Superfamily Superfamily superfamily	a.111.1 — Acid phosphatase/Vanadium-dependent haloperoxidase
Family Family family	a.111.1.1 — Type 2 phosphatidic acid phosphatase, PAP2

Domain ID domain_id	d1iw8f_
Class class	a — All alpha proteins
Fold Fold fold	a.111 — Acid phosphatase/Vanadium-dependent haloperoxidase
Superfamily Superfamily superfamily	a.111.1 — Acid phosphatase/Vanadium-dependent haloperoxidase
Family Family family	a.111.1.1 — Type 2 phosphatidic acid phosphatase, PAP2

CATH v4.4 (6 domains)

Domain ID domain_id	1iw8A00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	144 — Vanadium-containing Chloroperoxidase; domain 1
Homologous superfamily homologous superfamily	10 — Phosphatidic acid phosphatase type 2/haloperoxidase

Domain ID domain_id	1iw8B00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	144 — Vanadium-containing Chloroperoxidase; domain 1
Homologous superfamily homologous superfamily	10 — Phosphatidic acid phosphatase type 2/haloperoxidase

Domain ID domain_id	1iw8C00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	144 — Vanadium-containing Chloroperoxidase; domain 1
Homologous superfamily homologous superfamily	10 — Phosphatidic acid phosphatase type 2/haloperoxidase

Domain ID domain_id	1iw8D00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	144 — Vanadium-containing Chloroperoxidase; domain 1
Homologous superfamily homologous superfamily	10 — Phosphatidic acid phosphatase type 2/haloperoxidase

Domain ID domain_id	1iw8E00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	144 — Vanadium-containing Chloroperoxidase; domain 1
Homologous superfamily homologous superfamily	10 — Phosphatidic acid phosphatase type 2/haloperoxidase

Domain ID domain_id	1iw8F00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	144 — Vanadium-containing Chloroperoxidase; domain 1
Homologous superfamily homologous superfamily	10 — Phosphatidic acid phosphatase type 2/haloperoxidase

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Unit-cell length a length_a	137.800 Å
Unit-cell length b length_b	168.200 Å
Unit-cell length c length_c	58.400 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	24

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	10.000 Å
R factor r_factor	0.2430
R_work r_work	0.2430
R_free r_free	0.2840

Crystal Structure of a mutant of acid phosphatase from Escherichia blattae (G74D/I153T)

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

acid phosphatase

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

1iw8__assembly_1__model_1

1iw8__assembly_1__model_1 | I(q)

1iw8__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) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (2)

Crystal Structure of a mutant of acid phosphatase from Escherichia blattae (G74D/I153T)

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

acid phosphatase

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

1iw8__assembly_1__model_1

1iw8__assembly_1__model_1 | I(q)

1iw8__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) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (2)