SAXSdb — 2g6v

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

Riboflavin biosynthesis protein ribD

Escherichia coli

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	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	RIBD_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 29–394； UniProt 2–367 Author chain B； PDBConstruct 29–394； UniProt 2–367

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	2g6v
Deposition date deposition_date	2006-02-25
Structure title title	The crystal structure of ribD from Escherichia coli
Keywords keywords	ribD apo structure, Structural Genomics, Structural Proteomics in Europe, SPINE, HYDROLASE, OXIDOREDUCTASE; HYDROLASE, 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.

2g6v__assembly_1__model_1

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

Download this curve (.dat)

2g6v__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2g6v__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	33.02 Å
Rg (electron density)	32.31 Å
Total Rg	32.78 Å
Atom count	5465
Residues	700
Excluded volume	97267 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2g6v__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 (2)

Entity 1 Entity 1 polymer

Description description	Riboflavin biosynthesis protein ribD
Molecular weight formula_weight	44799.5 kDa
EC 编号 ec_number	1.1.1.193, 3.5.4.26
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	5530

MDYKDDDDKGSSTSLYKKAGSETLYIQGQDEYYMARALKLAQRGRFTTHPNPNVGCVIVKDGEIVGEGYHQRAGEPHAEVHALRMAGEKAKGATAYVTLEPCSHHGRTPPCCDALIAAGVARVVASMQDPNPQVAGRGLYRLQQAGIDVSHGLMMSEAEQLNKGFLKRMRTGFPYIQLKLGASLDGRTAMASGESQWITSPQARRDVQLLRAQSHAILTSSATVLADDPALTVRWSELDEQTQALYPQQNLRQPIRIVIDSQNRVTPVHRIVQQPGETWFARTQEDSREWPETVRTLLIPEHKGHLDLVVLMMQLGKQQINSIWVEAGPTLAGALLQAGLVDELIVYIAPKLLGSDARGLCTLPGLEKLADAPQFKFKEIRHVGPDVCLHLVGASTHHHHHH

Source Source

Source organism organism	Escherichia coli
NCBI taxonomy ID ncbi_taxonomy_id	562
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	65

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6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d2g6va1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.97 — Cytidine deaminase-like
Superfamily Superfamily superfamily	c.97.1 — Cytidine deaminase-like
Family Family family	c.97.1.0 — automated matches

Domain ID domain_id	d2g6va2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.71 — Dihydrofolate reductase-like
Superfamily Superfamily superfamily	c.71.1 — Dihydrofolate reductase-like
Family Family family	c.71.1.0 — automated matches

Domain ID domain_id	d2g6va3
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	d2g6vb1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.97 — Cytidine deaminase-like
Superfamily Superfamily superfamily	c.97.1 — Cytidine deaminase-like
Family Family family	c.97.1.0 — automated matches

Domain ID domain_id	d2g6vb2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.71 — Dihydrofolate reductase-like
Superfamily Superfamily superfamily	c.71.1 — Dihydrofolate reductase-like
Family Family family	c.71.1.0 — automated matches

Domain ID domain_id	d2g6vb3
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	2g6vA01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	140 — Cytidine Deaminase; domain 2
Homologous superfamily homologous superfamily	10 — Cytidine Deaminase, domain 2

Domain ID domain_id	2g6vA02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	430 — Dihydrofolate Reductase, subunit A
Homologous superfamily homologous superfamily	10 — Dihydrofolate Reductase, subunit A

Domain ID domain_id	2g6vB01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	140 — Cytidine Deaminase; domain 2
Homologous superfamily homologous superfamily	10 — Cytidine Deaminase, domain 2

Domain ID domain_id	2g6vB02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	430 — Dihydrofolate Reductase, subunit A
Homologous superfamily homologous superfamily	10 — Dihydrofolate Reductase, subunit A

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Unit-cell length a length_a	172.600 Å
Unit-cell length b length_b	172.600 Å
Unit-cell length c length_c	76.380 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	12

Space group space_group	P 31 2 1
Space-group number int_tables_number	152
Crystal system crystal_system	—

Resolution resolution	2.600 Å
Low-resolution limit resolution_low	28.250 Å
R factor r_factor	0.2463
R_work r_work	0.2442
R_free r_free	0.2854

The crystal structure of ribD from Escherichia coli

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

Riboflavin biosynthesis protein ribD

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

2g6v__assembly_1__model_1

2g6v__assembly_1__model_1 | I(q)

2g6v__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) 10 domains

SCOP 2.08 (6 domains)

CATH v4.4 (4 domains)

7. Citations (1)

The crystal structure of ribD from Escherichia coli

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

Riboflavin biosynthesis protein ribD

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

2g6v__assembly_1__model_1

2g6v__assembly_1__model_1 | I(q)

2g6v__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) 10 domains

SCOP 2.08 (6 domains)

CATH v4.4 (4 domains)

7. Citations (1)