SAXSdb — 1xiy

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

peroxiredoxin

Plasmodium falciparum

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q5MYR6_PLAF7
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 2–182； UniProt 60–240 Author chain B； PDBConstruct 2–182； UniProt 60–240

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	1xiy
Deposition date deposition_date	2004-09-22
Structure title title	Crystal Structure of Plasmodium falciparum antioxidant protein (1-Cys peroxiredoxin)
Keywords keywords	alpha-aneurysm, thioredoxin fold, peroxiredoxin fold, OXIDOREDUCTASE; OXIDOREDUCTASE
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.

1xiy__assembly_1__model_1

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

Download this curve (.dat)

1xiy__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1xiy__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	16.55 Å
Rg (electron density)	15.05 Å
Total Rg	16.15 Å
Atom count	1411
Residues	171
Excluded volume	25235 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1xiy__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1xiy__assembly_2__model_1`	monomeric （1）	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 (2)

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1xiya1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.47 — Thioredoxin fold
Superfamily Superfamily superfamily	c.47.1 — Thioredoxin-like
Family Family family	c.47.1.10 — Glutathione peroxidase-like

Domain ID domain_id	d1xiyb_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.47 — Thioredoxin fold
Superfamily Superfamily superfamily	c.47.1 — Thioredoxin-like
Family Family family	c.47.1.10 — Glutathione peroxidase-like

CATH v4.4 (2 domains)

Domain ID domain_id	1xiyA00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	30 — Glutaredoxin
Homologous superfamily homologous superfamily	10 — Glutaredoxin

Domain ID domain_id	1xiyB00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	30 — Glutaredoxin
Homologous superfamily homologous superfamily	10 — Glutaredoxin

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Unit-cell length a length_a	42.490 Å
Unit-cell length b length_b	79.770 Å
Unit-cell length c length_c	108.510 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	8

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	1.800 Å
Low-resolution limit resolution_low	100.000 Å
R factor r_factor	0.1870
R_work r_work	0.1870
R_free r_free	0.2180

Description description	peroxiredoxin
Molecular weight formula_weight	21360.2 kDa
Source method src_method	man
Copy count entity_count	2

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	3144

Crystal Structure of Plasmodium falciparum antioxidant protein (1-Cys peroxiredoxin)

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

peroxiredoxin

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

1xiy__assembly_1__model_1

1xiy__assembly_1__model_1 | I(q)

1xiy__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Source organism organism	Plasmodium falciparum
Common name common_name	malaria parasite P. falciparum
NCBI taxonomy ID ncbi_taxonomy_id	5833
Host organism host_organism	Escherichia coli

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	277

Crystal Structure of Plasmodium falciparum antioxidant protein (1-Cys peroxiredoxin)

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

peroxiredoxin

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

1xiy__assembly_1__model_1

1xiy__assembly_1__model_1 | I(q)

1xiy__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)