SAXSdb — 1fxr

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

FERREDOXIN I

Desulfovibrio africanus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	IRON/SULFUR CLUSTER × 2 SULFATE ION × 1 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	FER1_DESAF
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–64； UniProt 1–64 Author chain B； PDBConstruct 1–64； UniProt 1–64

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	1fxr
Deposition date deposition_date	1994-11-14
Structure title title	CRYSTAL STRUCTURE OF THE FERREDOXIN I FROM DESULFOVIBRIO AFRICANUS AT 2.3 ANGSTROMS RESOLUTION
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.

1fxr__assembly_1__model_1

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

Download this curve (.dat)

1fxr__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1fxr__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	16.96 Å
Rg (electron density)	16.21 Å
Total Rg	16.99 Å
Atom count	1021
Residues	128
Excluded volume	17943 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1fxr__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 (4)

Entity 1 Entity 1 polymer

Description description	FERREDOXIN I
Molecular weight formula_weight	7206.9 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	1091

ARKFYVDQDECIACESCVEIAPGAFAMDPEIEKAYVKDVEGASQEEVEEAMDTCPVQCIHWEDE

Source Source

Source organism organism	Desulfovibrio africanus
NCBI taxonomy ID ncbi_taxonomy_id	873

Entity 2 Entity 2 non-polymer

Description description	IRON/SULFUR CLUSTER
Molecular weight formula_weight	351.6 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 non-polymer

Description description	SULFATE ION
Molecular weight formula_weight	96.1 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	70

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1fxra_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.58 — Ferredoxin-like
Superfamily Superfamily superfamily	d.58.1 — 4Fe-4S ferredoxins
Family Family family	d.58.1.4 — Single 4Fe-4S cluster ferredoxin

Domain ID domain_id	d1fxrb_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.58 — Ferredoxin-like
Superfamily Superfamily superfamily	d.58.1 — 4Fe-4S ferredoxins
Family Family family	d.58.1.4 — Single 4Fe-4S cluster ferredoxin

CATH v4.4 (2 domains)

Domain ID domain_id	1fxrA00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	20 —

Domain ID domain_id	1fxrB00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	20 —

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Unit-cell length a length_a	96.600 Å
Unit-cell length b length_b	58.100 Å
Unit-cell length c length_c	20.700 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 21 21 2
Space-group number int_tables_number	18
Crystal system crystal_system	—

Resolution resolution	2.300 Å
Low-resolution limit resolution_low	10.000 Å
R factor r_factor	0.1820
R_work r_work	0.1820
R_free r_free	0.2270

CRYSTAL STRUCTURE OF THE FERREDOXIN I FROM DESULFOVIBRIO AFRICANUS AT 2.3 ANGSTROMS RESOLUTION

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

FERREDOXIN I

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

1fxr__assembly_1__model_1

1fxr__assembly_1__model_1 | I(q)

1fxr__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

CRYSTAL STRUCTURE OF THE FERREDOXIN I FROM DESULFOVIBRIO AFRICANUS AT 2.3 ANGSTROMS RESOLUTION

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

FERREDOXIN I

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

1fxr__assembly_1__model_1

1fxr__assembly_1__model_1 | I(q)

1fxr__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)