SAXSdb — 1qap

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

QUINOLINIC ACID PHOSPHORIBOSYLTRANSFERASE

Salmonella typhimurium

State in the Current Structure

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

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	NADC_SALTY
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–296； UniProt 1–296 Author chain B； PDBConstruct 1–296； UniProt 1–296

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	1qap
Deposition date deposition_date	1996-09-20
Structure title title	QUINOLINIC ACID PHOSPHORIBOSYLTRANSFERASE WITH BOUND QUINOLINIC ACID
Keywords keywords	GLYCOSYLTRANSFERASE, QUINOLINIC ACID, NAD BIOSYNTHESIS; GLYCOSYLTRANSFERASE
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.

1qap__assembly_1__model_1

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

Download this curve (.dat)

1qap__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1qap__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	26.78 Å
Rg (electron density)	25.84 Å
Total Rg	26.55 Å
Atom count	4462
Residues	578
Excluded volume	78711 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1qap__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	QUINOLINIC ACID PHOSPHORIBOSYLTRANSFERASE
Molecular weight formula_weight	32480.6 kDa
EC 编号 ec_number	2.4.2.19
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	4469

PPRRYNPDDRRDALLERINLDIPAAVAQALREDLGGEVDAGNDITAQLLPADTQAHATVITREDGVFCGKRWVEEVFIQLAGDDVRLTWHVDDGDAIHANQTVFELQGPARVLLTGERTALNFVQTLSGVASEVRRYVGLLAGTQTQLLDTRKTLPGLRTALKYAVLCGGGANHRLGLTDAFLIKENHIIASGSVRQAVEKAFWLHPDVPVEVEVENLDELDDALKAGADIIMLDNFNTDQMREAVKRVNGQARLEVSGNVTAETLREFAETGVDFISVGALTKHVRALDLSMRFC

Source Source

Source organism organism	Salmonella typhimurium
NCBI taxonomy ID ncbi_taxonomy_id	602
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 non-polymer

Description description	QUINOLINIC ACID
Molecular weight formula_weight	167.1 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	7

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6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d1qapa1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.17 — Nicotinate/Quinolinate PRTase C-terminal domain-like
Family Family family	c.1.17.1 — NadC C-terminal domain-like

Domain ID domain_id	d1qapa2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.41 — alpha/beta-Hammerhead
Superfamily Superfamily superfamily	d.41.2 — Nicotinate/Quinolinate PRTase N-terminal domain-like
Family Family family	d.41.2.1 — NadC N-terminal domain-like

Domain ID domain_id	d1qapb1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.17 — Nicotinate/Quinolinate PRTase C-terminal domain-like
Family Family family	c.1.17.1 — NadC C-terminal domain-like

Domain ID domain_id	d1qapb2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.41 — alpha/beta-Hammerhead
Superfamily Superfamily superfamily	d.41.2 — Nicotinate/Quinolinate PRTase N-terminal domain-like
Family Family family	d.41.2.1 — NadC N-terminal domain-like

CATH v4.4 (4 domains)

Domain ID domain_id	1qapA01
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	1170 — Aldehyde Oxidoreductase; domain 3
Homologous superfamily homologous superfamily	20 — Quinolinate phosphoribosyl transferase, N-terminal domain

Domain ID domain_id	1qapA02
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	1qapB01
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	1170 — Aldehyde Oxidoreductase; domain 3
Homologous superfamily homologous superfamily	20 — Quinolinate phosphoribosyl transferase, N-terminal domain

Domain ID domain_id	1qapB02
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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Unit-cell length a length_a	81.400 Å
Unit-cell length b length_b	81.400 Å
Unit-cell length c length_c	217.300 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 41 21 2
Space-group number int_tables_number	92
Crystal system crystal_system	—

Resolution resolution	2.800 Å
Low-resolution limit resolution_low	15.000 Å
R factor r_factor	0.1860
R_work r_work	0.1860
R_free r_free	0.2740

QUINOLINIC ACID PHOSPHORIBOSYLTRANSFERASE WITH BOUND QUINOLINIC ACID

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

QUINOLINIC ACID PHOSPHORIBOSYLTRANSFERASE

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

1qap__assembly_1__model_1

1qap__assembly_1__model_1 | I(q)

1qap__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) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)

QUINOLINIC ACID PHOSPHORIBOSYLTRANSFERASE WITH BOUND QUINOLINIC ACID

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

QUINOLINIC ACID PHOSPHORIBOSYLTRANSFERASE

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

1qap__assembly_1__model_1

1qap__assembly_1__model_1 | I(q)

1qap__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) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)