SAXSdb — 2i44

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

Serine-threonine phosphatase 2C

Toxoplasma gondii

State in the Current Structure

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

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q8WPN9_TOXGO
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 3–324； UniProt 10–331 Author chain B； PDBConstruct 3–324； UniProt 10–331 Author chain C； PDBConstruct 3–324； UniProt 10–331

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	2i44
Deposition date deposition_date	2006-08-21
Structure title title	Crystal structure of serine-threonine phosphatase 2C from Toxoplasma gondii
Keywords keywords	;phosphatase, PSI-2, 8817z, Structural Genomics, Protein Structure Initiative, New York SGX Research Center for Structural Genomics, NYSGXRC, 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.

2i44__assembly_1__model_1

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

Download this curve (.dat)

2i44__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2i44__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	20.96 Å
Rg (electron density)	19.83 Å
Total Rg	20.66 Å
Atom count	2467
Residues	304
Excluded volume	43809 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2i44__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2i44__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`2i44__assembly_3__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 (3)

Entity 1 Entity 1 polymer

Description description	Serine-threonine phosphatase 2C
Molecular weight formula_weight	36628.2 kDa
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C
Atom count atom_count	7746

SLTMDVPPTIHVPLPPTSYPAFDAAIFTDIGGRKHQEDRFTLCPQLVPGRDDCAFFGVFDGTVGDFASENVKDLVVPQLISSPAWQEVTEMLRSDVPATEVDEKLPQLLDQAVDDMYKNADNELVKMCEQLNKDYASSTSVTAVLAKGFVAVGHLGDSRIAMGVETPNGLNCEFLTVDHKPDMPHEKLRIMRNGGSVEYLHNHNNKPFIRGGDFSFRKSRGEQPMQLQYSRAFGGKDLKMYGLSNQPDVRVVRVTPQHRVMILATDGLWDVMSAAQAVEIAMQARQEGRNPAQALVEMTLAEQQSRNQSADNITAMTVFFKKTD

Source Source

Source organism organism	Toxoplasma gondii
NCBI taxonomy ID ncbi_taxonomy_id	5811
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	CALCIUM ION
Molecular weight formula_weight	40.1 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	353

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6. Fold Classification (SCOP + CATH) 3 domains

CATH v4.4 (3 domains)

Domain ID domain_id	2i44A00
Class class	3 — Alpha Beta
Architecture architecture	60 — 4-Layer Sandwich
Topology topology	40 — Phosphatase 2c; domain 1
Homologous superfamily homologous superfamily	10 — PPM-type phosphatase domain

Domain ID domain_id	2i44B00
Class class	3 — Alpha Beta
Architecture architecture	60 — 4-Layer Sandwich
Topology topology	40 — Phosphatase 2c; domain 1
Homologous superfamily homologous superfamily	10 — PPM-type phosphatase domain

Domain ID domain_id	2i44C00
Class class	3 — Alpha Beta
Architecture architecture	60 — 4-Layer Sandwich
Topology topology	40 — Phosphatase 2c; domain 1
Homologous superfamily homologous superfamily	10 — PPM-type phosphatase domain

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Unit-cell length a length_a	96.400 Å
Unit-cell length b length_b	192.960 Å
Unit-cell length c length_c	61.440 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	12

Space group space_group	P 21 21 2
Space-group number int_tables_number	18
Crystal system crystal_system	—

Resolution resolution	2.040 Å
Low-resolution limit resolution_low	50.000 Å
R factor r_factor	0.2188
R_work r_work	0.2188
R_free r_free	0.2445

Crystal structure of serine-threonine phosphatase 2C from Toxoplasma gondii

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

Serine-threonine phosphatase 2C

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

2i44__assembly_1__model_1

2i44__assembly_1__model_1 | I(q)

2i44__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) 3 domains

CATH v4.4 (3 domains)

7. Citations (1)

Crystal structure of serine-threonine phosphatase 2C from Toxoplasma gondii

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

Serine-threonine phosphatase 2C

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

2i44__assembly_1__model_1

2i44__assembly_1__model_1 | I(q)

2i44__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) 3 domains

CATH v4.4 (3 domains)

7. Citations (1)