SAXSdb — 2w4s

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

Ankyrin-repeat protein

Cryptosporidium parvum

State in the Current Structure

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

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	A0A7G2HK26_CRYPV
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 4–113； UniProt 387–496 Author chain B； PDBConstruct 4–113； UniProt 387–496 Author chain C； PDBConstruct 4–113； UniProt 387–496 Author chain D； PDBConstruct 4–113； UniProt 387–496

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	2w4s
Deposition date deposition_date	2008-12-02
Structure title title	novel RNA-binding domain in Cryptosporidium parvum at 2.5 angstrom resolution
Keywords keywords	RNA TRANSPORT, STRUCTURAL PROTEIN; STRUCTURAL PROTEIN
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.

2w4s__assembly_1__model_1

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

Download this curve (.dat)

2w4s__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2w4s__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	18.90 Å
Rg (electron density)	17.76 Å
Total Rg	18.67 Å
Atom count	1368
Residues	172
Excluded volume	24657 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2w4s__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2w4s__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 (2)

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6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id	2w4sA00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	1440 — PHAX RNA-binding domain

Domain ID domain_id	2w4sB00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	1440 — PHAX RNA-binding domain

Domain ID domain_id	2w4sC00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	1440 — PHAX RNA-binding domain

Domain ID domain_id	2w4sD00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	1440 — PHAX RNA-binding domain

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Unit-cell length a length_a	42.180 Å
Unit-cell length b length_b	52.862 Å
Unit-cell length c length_c	99.315 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	94.05 °
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	2.450 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	0.1960
R_work r_work	0.1930
R_free r_free	0.2540

Description description	Ankyrin-repeat protein
Molecular weight formula_weight	13007.1 kDa
Source method src_method	man
Copy count entity_count	4

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	2820

novel RNA-binding domain in Cryptosporidium parvum at 2.5 angstrom resolution

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

Ankyrin-repeat protein

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

2w4s__assembly_1__model_1

2w4s__assembly_1__model_1 | I(q)

2w4s__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)

Source organism organism	Cryptosporidium parvum
NCBI taxonomy ID ncbi_taxonomy_id	5807
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	92

novel RNA-binding domain in Cryptosporidium parvum at 2.5 angstrom resolution

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

Ankyrin-repeat protein

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

2w4s__assembly_1__model_1

2w4s__assembly_1__model_1 | I(q)

2w4s__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)