SAXSdb — 2c2g

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

THREONINE SYNTHASE

ARABIDOPSIS THALIANA

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	PYRIDOXAL-5'-PHOSPHATE × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	THRC1_ARATH
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–486； UniProt 41–526 Author chain B； PDBConstruct 1–486； UniProt 41–526

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	2c2g
Deposition date deposition_date	2005-09-29
Structure title title	Crystal structure of Threonine Synthase from Arabidopsis thaliana in complex with its cofactor pyridoxal phosphate
Keywords keywords	SYNTHASE, LYASE, THREONINE BIOSYNTHESIS, PYRIDOXAL PHOSPHATE, AMINO-ACID BIOSYNTHESIS; LYASE
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.

2c2g__assembly_1__model_1

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

Download this curve (.dat)

2c2g__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2c2g__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	28.43 Å
Rg (electron density)	27.43 Å
Total Rg	28.31 Å
Atom count	6894
Residues	885
Excluded volume	122830 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2c2g__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	THREONINE SYNTHASE
Molecular weight formula_weight	53385.6 kDa
EC 编号 ec_number	4.2.3.1
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	7015

ADGNNIKAPIETAVKPPHRTEDNIRDEARRNRSNAVNPFSAKYVPFNAAPGSTESYSLDEIVYRSRSGGLLDVEHDMEALKRFDGAYWRDLFDSRVGKSTWPYGSGVWSKKEWVLPEIDDDDIVSAFEGNSNLFWAERFGKQFLGMNDLWVKHCGISHTGSFKDLGMTVLVSQVNRLRKMKRPVVGVGCASTGDTSAALSAYCASAGIPSIVFLPANKISMAQLVQPIANGAFVLSIDTDFDGCMKLIREITAELPIYLANSLNSLRLEGQKTAAIEILQQFDWQVPDWVIVPGGNLGNIYAFYKGFKMCQELGLVDRIPRMVCAQAANANPLYLHYKSGWKDFKPMTASTTFASAIQIGDPVSIDRAVYALKKCNGIVEEATEEELMDAMAQADSTGMFICPHTGVALTALFKLRNQGVIAPTDRTVVVSTAHGLKFTQSKIDYHSNAIPDMACRFSNPPVDVKADFGAVMDVLKSYLGSNTLTS

Source Source

Source organism organism	ARABIDOPSIS THALIANA
Common name common_name	MOUSE-EAR CRESS
NCBI taxonomy ID ncbi_taxonomy_id	3702
Host organism host_organism	ESCHERICHIA COLI

Entity 2 Entity 2 non-polymer

Description description	PYRIDOXAL-5'-PHOSPHATE
Molecular weight formula_weight	247.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	121

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d2c2ga_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.79 — Tryptophan synthase beta subunit-like PLP-dependent enzymes
Superfamily Superfamily superfamily	c.79.1 — Tryptophan synthase beta subunit-like PLP-dependent enzymes
Family Family family	c.79.1.1 — Tryptophan synthase beta subunit-like PLP-dependent enzymes

Domain ID domain_id	d2c2gb_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.79 — Tryptophan synthase beta subunit-like PLP-dependent enzymes
Superfamily Superfamily superfamily	c.79.1 — Tryptophan synthase beta subunit-like PLP-dependent enzymes
Family Family family	c.79.1.1 — Tryptophan synthase beta subunit-like PLP-dependent enzymes

CATH v4.4 (4 domains)

Domain ID domain_id	2c2gA01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1100 —

Domain ID domain_id	2c2gA02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1100 —

Domain ID domain_id	2c2gB01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1100 —

Domain ID domain_id	2c2gB02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1100 —

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Unit-cell length a length_a	57.626 Å
Unit-cell length b length_b	61.014 Å
Unit-cell length c length_c	76.678 Å
Unit-cell angle α angle_alpha	108.96 °
Unit-cell angle β angle_beta	102.00 °
Unit-cell angle γ angle_gamma	107.36 °
Molecules per unit cell Z z_pdb	2

Space group space_group	P 1
Space-group number int_tables_number	1
Crystal system crystal_system	—

Resolution resolution	2.610 Å
Low-resolution limit resolution_low	20.630 Å
R factor r_factor	0.1910
R_work r_work	0.1870
R_free r_free	0.2640

Crystal structure of Threonine Synthase from Arabidopsis thaliana in complex with its cofactor pyridoxal phosphate

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

THREONINE SYNTHASE

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

2c2g__assembly_1__model_1

2c2g__assembly_1__model_1 | I(q)

2c2g__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) 6 domains

SCOP 2.08 (2 domains)

CATH v4.4 (4 domains)

7. Citations (1)

Crystal structure of Threonine Synthase from Arabidopsis thaliana in complex with its cofactor pyridoxal phosphate

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

THREONINE SYNTHASE

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

2c2g__assembly_1__model_1

2c2g__assembly_1__model_1 | I(q)

2c2g__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) 6 domains

SCOP 2.08 (2 domains)

CATH v4.4 (4 domains)

7. Citations (1)