SAXSdb — 2fx2

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

FLAVODOXIN

Desulfovibrio vulgaris

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	FLAVIN MONONUCLEOTIDE × 1 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	FLAV_DESVH
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 2–147； UniProt 3–148

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	2fx2
Deposition date deposition_date	1991-10-17
Structure title title	COMPARISON OF THE CRYSTAL STRUCTURES OF A FLAVODOXIN IN ITS THREE OXIDATION STATES AT CRYOGENIC TEMPERATURES
Keywords keywords	ELECTRON TRANSPORT; ELECTRON TRANSPORT
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.

2fx2__assembly_1__model_1

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

Download this curve (.dat)

2fx2__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2fx2__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	15.68 Å
Rg (electron density)	14.16 Å
Total Rg	15.20 Å
Atom count	1133
Residues	147
Excluded volume	19725 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2fx2__assembly_1__model_1`	monomeric （1）	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	FLAVODOXIN
Molecular weight formula_weight	15678.1 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	1263

AKALIVYGSTTGNTEYTAETIARELADAGYEVDSRDAASVEAGGLFEGFDLVLLGCSTWGDDSIELQDDFIPLFDSLEETGAQGRKVACFGCGDSSYEYFCGAVDAIEEKLKNLGAEIVQDGLRIDGDPRAARDDIVGWAHDVRGAI

Source Source

Source organism organism	Desulfovibrio vulgaris
NCBI taxonomy ID ncbi_taxonomy_id	881

Entity 2 Entity 2 non-polymer

Description description	FLAVIN MONONUCLEOTIDE
Molecular weight formula_weight	456.3 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	130

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6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_id	d2fx2a_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.23 — Flavodoxin-like
Superfamily Superfamily superfamily	c.23.5 — Flavoproteins
Family Family family	c.23.5.1 — Flavodoxin-related

CATH v4.4 (1 domains)

Domain ID domain_id	2fx2A00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	360 — Flavodoxin domain

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7. Citations (6)

Comparison of the crystal structures of a flavodoxin in its three oxidation states at cryogenic temperatures.

J.Mol.Biol. (1991)

PMID: 2002503 · DOI: 10.1016/0022-2836(91)90884-9 PRIMARY

Cloning, Nucleotide Sequence, and Expression of the Flavodoxin Gene from Disulfovibrio Vulgaris (Hildenborough)

J.Biol.Chem. (1988)

A Crystallographic Structural Study of the Oxidation States of Desulfovibrio Vulgaris Flavodoxin

Flavins and Flavoproteins (1976)

Flavin Mononucleotide Conformation and Environment in Flavodoxin from Desulfovibrio Vulgaris

;STRUCTURE AND CONFORMATION OF NUCLEIC ACIDS AND PROTEIN-NUCLEIC ACID INTERACTIONS : PROCEEDINGS OF THE FOURTH ANNUAL HARRY STEENBOCK SYMPOSIUM, JUNE 16-19, 1974, MADISON, WISCONSIN ; (1975)

The Binding of Riboflavin-5-Phosphate in a Flavoprotein. Flavodoxin at 2.0-Angstroms Resolution

Proc.Natl.Acad.Sci.USA (1973)

;Structure of the Oxidized Form of a Flavodoxin at 2.5-Angstroms Resolution. Resolution of the Phase Ambiguity by Anomalous Scattering ;

Proc.Natl.Acad.Sci.USA (1972)

Unit-cell length a length_a	51.960 Å
Unit-cell length b length_b	51.960 Å
Unit-cell length c length_c	139.860 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	8

Space group space_group	P 43 21 2
Space-group number int_tables_number	96
Crystal system crystal_system	—

Resolution resolution	1.900 Å
Low-resolution limit resolution_low	— Å
R factor r_factor	0.1700
R_work r_work	—
R_free r_free	—

COMPARISON OF THE CRYSTAL STRUCTURES OF A FLAVODOXIN IN ITS THREE OXIDATION STATES AT CRYOGENIC TEMPERATURES

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

FLAVODOXIN

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

2fx2__assembly_1__model_1

2fx2__assembly_1__model_1 | I(q)

2fx2__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) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (6)

COMPARISON OF THE CRYSTAL STRUCTURES OF A FLAVODOXIN IN ITS THREE OXIDATION STATES AT CRYOGENIC TEMPERATURES

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

FLAVODOXIN

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

2fx2__assembly_1__model_1

2fx2__assembly_1__model_1 | I(q)

2fx2__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) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (6)