SAXSdb — 4tim

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

TRIOSEPHOSPHATE ISOMERASE

Trypanosoma brucei brucei

State in the Current Structure

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

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	TPIS_TRYBB
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–250； UniProt 1–250 Author chain B； PDBConstruct 1–250； UniProt 1–250

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	4tim
Deposition date deposition_date	1991-04-11
Structure title title	CRYSTALLOGRAPHIC AND MOLECULAR MODELING STUDIES ON TRYPANOSOMAL TRIOSEPHOSPHATE ISOMERASE: A CRITICAL ASSESSMENT OF THE PREDICTED AND OBSERVED STRUCTURES OF THE COMPLEX WITH 2-PHOSPHOGLYCERATE
Keywords keywords	ISOMERASE(INTRAMOLECULAR OXIDOREDUCTASE); ISOMERASE(INTRAMOLECULAR 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.

4tim__assembly_1__model_1

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

Download this curve (.dat)

4tim__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

4tim__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	25.71 Å
Rg (electron density)	24.69 Å
Total Rg	25.53 Å
Atom count	3777
Residues	498
Excluded volume	67590 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`4tim__assembly_1__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 (3)

Entity 1 Entity 1 polymer

Description description	TRIOSEPHOSPHATE ISOMERASE
Molecular weight formula_weight	26865.8 kDa
EC 编号 ec_number	5.3.1.1
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	3907

MSKPQPIAAANWKCNGSQQSLSELIDLFNSTSINHDVQCVVASTFVHLAMTKERLSHPKFVIAAQNAIAKSGAFTGEVSLPILKDFGVNWIVLGHSERRAYYGETNEIVADKVAAAVASGFMVIACIGETLQERESGRTAVVVLTQIAAIAKKLKKADWAKVVIAYEPVWAIGTGKVATPQQAQEAHALIRSWVSSKIGADVAGELRILYGGSVNGKNARTLYQQRDVNGFLVGGASLKPEFVDIIKATQ

Source Source

Source organism organism	Trypanosoma brucei brucei
NCBI taxonomy ID ncbi_taxonomy_id	5702

Entity 2 Entity 2 non-polymer

Description description	2-PHOSPHOGLYCERIC ACID
Molecular weight formula_weight	186.1 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	130

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d4tima_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.1 — Triosephosphate isomerase (TIM)
Family Family family	c.1.1.1 — Triosephosphate isomerase (TIM)

Domain ID domain_id	d4timb_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.1 — Triosephosphate isomerase (TIM)
Family Family family	c.1.1.1 — Triosephosphate isomerase (TIM)

CATH v4.4 (2 domains)

Domain ID domain_id	4timA00
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	70 — Aldolase class I

Domain ID domain_id	4timB00
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	70 — Aldolase class I

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7. Citations (6)

;Crystallographic and molecular modeling studies on trypanosomal triosephosphate isomerase: a critical assessment of the predicted and observed structures of the complex with 2-phosphoglycerate. ;

J.Med.Chem. (1991)

PMID: 1895291 · DOI: 10.1021/jm00113a007 PRIMARY

;The Adaptability of the Active Site of Trypanosomal Triosephosphate Isomerase as Observed in the Crystal Structures of Three Different Complexes ;

Proteins (1991)

;The Crystal Structure of the "Open" and the "Closed" Conformation of the Flexible Loop of Trypanosomal Triosephosphate Isomerase ;

Proteins (1991)

;Refined 1.83 Angstroms Structure of Trypanosomal Triosephosphate Isomerase, Crystallized in the Presence of 2.4 M-Ammonium Sulphate. A Comparison with the Structure of the Trypanosomal Triosephosphate Isomerase-Glycerol-3-Phosphate Complex ;

J.Mol.Biol. (1991)

Structure Determination of the Glycosomal Triosephosphate Isomerase from Trypanosoma Brucei Brucei at 2.4 Angstroms Resolution

J.Mol.Biol. (1987)

Preliminary Crystallographic Studies of Triosephosphate Isomerase from the Blood Parasite Trypanosoma Brucei Brucei

J.Mol.Biol. (1984)

Unit-cell length a length_a	112.590 Å
Unit-cell length b length_b	97.290 Å
Unit-cell length c length_c	46.700 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	2.400 Å
Low-resolution limit resolution_low	15.000 Å
R factor r_factor	0.1490
R_work r_work	—
R_free r_free	—

CRYSTALLOGRAPHIC AND MOLECULAR MODELING STUDIES ON TRYPANOSOMAL TRIOSEPHOSPHATE ISOMERASE: A CRITICAL ASSESSMENT OF THE PREDICTED AND OBSERVED STRUCTURES OF THE COMPLEX WITH 2-PHOSPHOGLYCERATE

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

TRIOSEPHOSPHATE ISOMERASE

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

4tim__assembly_1__model_1

4tim__assembly_1__model_1 | I(q)

4tim__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 (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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (6)

CRYSTALLOGRAPHIC AND MOLECULAR MODELING STUDIES ON TRYPANOSOMAL TRIOSEPHOSPHATE ISOMERASE: A CRITICAL ASSESSMENT OF THE PREDICTED AND OBSERVED STRUCTURES OF THE COMPLEX WITH 2-PHOSPHOGLYCERATE

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

TRIOSEPHOSPHATE ISOMERASE

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

4tim__assembly_1__model_1

4tim__assembly_1__model_1 | I(q)

4tim__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 (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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (6)