SAXSdb — 1vq3

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

Phosphoribosylformylglycinamidine synthase, purS subunit

Thermotoga maritima

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 4	water × 4	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	water × 2	Consistent with protein count
3	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	Q9X0X1_THEMA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 13–94； UniProt 1–82 Author chain B； PDBConstruct 13–94； UniProt 1–82 Author chain C； PDBConstruct 13–94； UniProt 1–82 Author chain D； PDBConstruct 13–94； UniProt 1–82

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	1vq3
Deposition date deposition_date	2004-12-15
Structure title title	Crystal structure of Phosphoribosylformylglycinamidine synthase, purS subunit (EC 6.3.5.3) (TM1244) from Thermotoga maritima at 1.90 A resolution
Keywords keywords	;TM1244, phosphoribosylformylglycinamidine synthase, purs subunit (EC 6.3.5.3), Structural Genomics, Joint Center for Structural Genomics, JCSG, Protein Structure Initiative, PSI, LIGASE ;; LIGASE
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.

1vq3__assembly_1__model_1

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

Download this curve (.dat)

1vq3__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1vq3__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	23.93 Å
Rg (electron density)	22.88 Å
Total Rg	23.66 Å
Atom count	2789
Residues	341
Excluded volume	49967 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1vq3__assembly_1__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1vq3__assembly_2__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`1vq3__assembly_3__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) 12 domains

SCOP 2.08 (8 domains)

Domain ID domain_id	d1vq3a1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.284 — PurS-like
Superfamily Superfamily superfamily	d.284.1 — PurS-like
Family Family family	d.284.1.1 — PurS subunit of FGAM synthetase

Domain ID domain_id	d1vq3a2
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

Domain ID domain_id	d1vq3b1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.284 — PurS-like
Superfamily Superfamily superfamily	d.284.1 — PurS-like
Family Family family	d.284.1.1 — PurS subunit of FGAM synthetase

Domain ID domain_id	d1vq3b2
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

Domain ID domain_id	d1vq3c1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.284 — PurS-like
Superfamily Superfamily superfamily	d.284.1 — PurS-like
Family Family family	d.284.1.1 — PurS subunit of FGAM synthetase

Domain ID domain_id	d1vq3c2
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

Domain ID domain_id	d1vq3d1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.284 — PurS-like
Superfamily Superfamily superfamily	d.284.1 — PurS-like
Family Family family	d.284.1.1 — PurS subunit of FGAM synthetase

Domain ID domain_id	d1vq3d2
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 (4 domains)

Domain ID domain_id	1vq3A00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1280 — Mth169; Chain: A ,
Homologous superfamily homologous superfamily	10 — Phosphoribosylformylglycinamidine synthase subunit PurS

Domain ID domain_id	1vq3B00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1280 — Mth169; Chain: A ,
Homologous superfamily homologous superfamily	10 — Phosphoribosylformylglycinamidine synthase subunit PurS

Domain ID domain_id	1vq3C00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1280 — Mth169; Chain: A ,
Homologous superfamily homologous superfamily	10 — Phosphoribosylformylglycinamidine synthase subunit PurS

Domain ID domain_id	1vq3D00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1280 — Mth169; Chain: A ,
Homologous superfamily homologous superfamily	10 — Phosphoribosylformylglycinamidine synthase subunit PurS

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Unit-cell length a length_a	58.270 Å
Unit-cell length b length_b	73.433 Å
Unit-cell length c length_c	92.567 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	16

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	1.900 Å
Low-resolution limit resolution_low	49.310 Å
R factor r_factor	0.1799
R_work r_work	0.1778
R_free r_free	0.2345

Description description	Phosphoribosylformylglycinamidine synthase, purS subunit
Molecular weight formula_weight	11099.8 kDa
EC 编号 ec_number	6.3.5.3
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	3090

Crystal structure of Phosphoribosylformylglycinamidine synthase, purS subunit (EC 6.3.5.3) (TM1244) from Thermotoga maritima at 1.90 A resolution

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

Phosphoribosylformylglycinamidine synthase, purS subunit

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

1vq3__assembly_1__model_1

1vq3__assembly_1__model_1 | I(q)

1vq3__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) 12 domains

SCOP 2.08 (8 domains)

CATH v4.4 (4 domains)

7. Citations (1)

Source organism organism	Thermotoga maritima
NCBI taxonomy ID ncbi_taxonomy_id	243274
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	301

Crystal structure of Phosphoribosylformylglycinamidine synthase, purS subunit (EC 6.3.5.3) (TM1244) from Thermotoga maritima at 1.90 A resolution

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

Phosphoribosylformylglycinamidine synthase, purS subunit

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

1vq3__assembly_1__model_1

1vq3__assembly_1__model_1 | I(q)

1vq3__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) 12 domains

SCOP 2.08 (8 domains)

CATH v4.4 (4 domains)

7. Citations (1)