SAXSdb — 2fwj

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

N5-carboxyaminoimidazole ribonucleotide mutase

Acetobacter aceti

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 8	5-AMINOIMIDAZOLE RIBONUCLEOTIDE × 4 water × 8	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 16	5-AMINOIMIDAZOLE RIBONUCLEOTIDE × 8 water × 16	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q2QJL3_ACEAC
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 2–183； UniProt 1–182 Author chain B； PDBConstruct 2–183； UniProt 1–182

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	2fwj
Deposition date deposition_date	2006-02-02
Structure title title	Structure of PurE (N5-carboxyaminoimidazole ribonucleotide mutase) from the acidophilic bacterium Acetobacter aceti, complexed with AIR (5-aminoimidazole ribonucleotide)
Keywords keywords	acidophile, PurE, purine biosynthesis, Lyase; 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.

2fwj__assembly_1__model_1

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

Download this curve (.dat)

2fwj__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2fwj__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	31.48 Å
Rg (electron density)	30.63 Å
Total Rg	31.19 Å
Atom count	9304
Residues	1276
Excluded volume	166680 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2fwj__assembly_1__model_1`	octameric （8）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2fwj__assembly_2__model_1`	hexadecameric （16）	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	N5-carboxyaminoimidazole ribonucleotide mutase
Molecular weight formula_weight	18882.7 kDa
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	2524

MMSETAPLPSASSALEDKAASAPVVGIIMGSQSDWETMRHADALLTELEIPHETLIVSAHRTPDRLADYARTAAERGLNVIIAGAGGAAHLPGMCAAWTRLPVLGVPVESRALKGMDSLLSIVQMPGGVPVGTLAIGASGAKNAALLAASILALYNPALAARLETWRALQTASVPNSPITEDK

Source Source

Source organism organism	Acetobacter aceti
NCBI taxonomy ID ncbi_taxonomy_id	435
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	5-AMINOIMIDAZOLE RIBONUCLEOTIDE
Molecular weight formula_weight	295.2 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	198

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d2fwja_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.23 — Flavodoxin-like
Superfamily Superfamily superfamily	c.23.8 — N5-CAIR mutase (phosphoribosylaminoimidazole carboxylase, PurE)
Family Family family	c.23.8.1 — N5-CAIR mutase (phosphoribosylaminoimidazole carboxylase, PurE)

Domain ID domain_id	d2fwjb_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.23 — Flavodoxin-like
Superfamily Superfamily superfamily	c.23.8 — N5-CAIR mutase (phosphoribosylaminoimidazole carboxylase, PurE)
Family Family family	c.23.8.1 — N5-CAIR mutase (phosphoribosylaminoimidazole carboxylase, PurE)

CATH v4.4 (2 domains)

Domain ID domain_id	2fwjA00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1970 —

Domain ID domain_id	2fwjB00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1970 —

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Unit-cell length a length_a	99.199 Å
Unit-cell length b length_b	99.199 Å
Unit-cell length c length_c	164.389 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	32

Space group space_group	I 4 2 2
Space-group number int_tables_number	97
Crystal system crystal_system	—

Resolution resolution	1.950 Å
Low-resolution limit resolution_low	35.460 Å
R factor r_factor	0.1910
R_work r_work	0.1910
R_free r_free	0.2020

Structure of PurE (N5-carboxyaminoimidazole ribonucleotide mutase) from the acidophilic bacterium Acetobacter aceti, complexed with AIR (5-aminoimidazole ribonucleotide)

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

N5-carboxyaminoimidazole ribonucleotide mutase

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

2fwj__assembly_1__model_1

2fwj__assembly_1__model_1 | I(q)

2fwj__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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Structure of PurE (N5-carboxyaminoimidazole ribonucleotide mutase) from the acidophilic bacterium Acetobacter aceti, complexed with AIR (5-aminoimidazole ribonucleotide)

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

N5-carboxyaminoimidazole ribonucleotide mutase

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

2fwj__assembly_1__model_1

2fwj__assembly_1__model_1 | I(q)

2fwj__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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)