SAXSdb — 2qer

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

Cyclophilin-like protein, putative

Cryptosporidium parvum Iowa II

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	SULFATE ION × 1 ALANINE × 1 PROLINE × 1 GLYCEROL × 3 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	A3FQ68_CRYPV
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 19–185； UniProt 3–169

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	2qer
Deposition date deposition_date	2007-06-26
Structure title title	Crystal structure of Cryptosporidium parvum cyclophilin type peptidyl-prolyl cis-trans isomerase cgd2_1660 in the presence of dipeptide ala-pro
Keywords keywords	cryptosporidium, parvum, malaria, cyclophilin, Structural Genomics, Structural Genomics Consortium, SGC, ISOMERASE; ISOMERASE
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.

2qer__assembly_1__model_1

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

Download this curve (.dat)

2qer__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2qer__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	15.80 Å
Rg (electron density)	14.43 Å
Total Rg	15.71 Å
Atom count	1277
Residues	158
Excluded volume	22794 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2qer__assembly_1__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 (6)

Entity 1 Entity 1 polymer

Description description	Cyclophilin-like protein, putative
Molecular weight formula_weight	20868.6 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	1397

MHHHHHHSSGRENLYFQGVRIITNYGDLKFELFCSQCPKACKNFLALSASGYYKNTIFHKNIKGFIIQGGDPTGTGKGGESIYGRYFDDEIYPELKYDRRGILSMASKGASKKPNTNGSQFFITYSSLPQLNGEYVIFGKLIDGFETLNTLENCPSDKSHKPIDEIIIKDIVIHSNPIADQEILD

Source Source

Source organism organism	Cryptosporidium parvum Iowa II
NCBI taxonomy ID ncbi_taxonomy_id	353152
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	1

Entity 3 Entity 3 non-polymer

Description description	ALANINE
Molecular weight formula_weight	89.1 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 4 Entity 4 non-polymer

Description description	PROLINE
Molecular weight formula_weight	115.1 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 5 Entity 5 non-polymer

Description description	GLYCEROL
Molecular weight formula_weight	92.1 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 6 Entity 6 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	120

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6. Fold Classification (SCOP + CATH) 3 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d2qera1
Class class	b — All beta proteins
Fold Fold fold	b.62 — Cyclophilin-like
Superfamily Superfamily superfamily	b.62.1 — Cyclophilin-like
Family Family family	b.62.1.0 — automated matches

Domain ID domain_id	d2qera2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

CATH v4.4 (1 domains)

Domain ID domain_id	2qerA00
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	100 — Cyclophilin
Homologous superfamily homologous superfamily	10 — Cyclophilin-like

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Unit-cell length a length_a	69.047 Å
Unit-cell length b length_b	69.047 Å
Unit-cell length c length_c	124.622 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 41 21 2
Space-group number int_tables_number	92
Crystal system crystal_system	—

Resolution resolution	2.170 Å
Low-resolution limit resolution_low	24.780 Å
R factor r_factor	0.2271
R_work r_work	0.2257
R_free r_free	0.2518

Crystal structure of Cryptosporidium parvum cyclophilin type peptidyl-prolyl cis-trans isomerase cgd2_1660 in the presence of dipeptide ala-pro

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

Cyclophilin-like protein, putative

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

2qer__assembly_1__model_1

2qer__assembly_1__model_1 | I(q)

2qer__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 (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 3 domains

SCOP 2.08 (2 domains)

CATH v4.4 (1 domains)

7. Citations (1)

Crystal structure of Cryptosporidium parvum cyclophilin type peptidyl-prolyl cis-trans isomerase cgd2_1660 in the presence of dipeptide ala-pro

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

Cyclophilin-like protein, putative

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

2qer__assembly_1__model_1

2qer__assembly_1__model_1 | I(q)

2qer__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 (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 3 domains

SCOP 2.08 (2 domains)

CATH v4.4 (1 domains)

7. Citations (1)