SAXSdb — 3fet

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

Electron transfer flavoprotein subunit alpha related protein

Thermoplasma acidophilum

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
2	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	Q9HLL5_THEAC
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 4–166； UniProt 1–163 Author chain B； PDBConstruct 4–166； UniProt 1–163 Author chain C； PDBConstruct 4–166； UniProt 1–163 Author chain D； PDBConstruct 4–166； UniProt 1–163

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	3fet
Deposition date deposition_date	2008-12-01
Structure title title	Crystal Structure of the Electron Transfer Flavoprotein Subunit Alpha related Protein Ta0212 from Thermoplasma acidophilum
Keywords keywords	;alpha-beta-alpha sandwich, Structural Genomics, PSI-2, Protein Structure Initiative, Midwest Center for Structural Genomics, MCSG, 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.

3fet__assembly_2__model_1

Assembly 2 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

3fet__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3fet__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	21.41 Å
Rg (electron density)	20.25 Å
Total Rg	21.32 Å
Atom count	2510
Residues	321
Excluded volume	45128 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3fet__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3fet__assembly_2__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)

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6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id	3fetA00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	620 — HUPs

Domain ID domain_id	3fetB00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	620 — HUPs

Domain ID domain_id	3fetC00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	620 — HUPs

Domain ID domain_id	3fetD00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	620 — HUPs

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Unit-cell length a length_a	48.696 Å
Unit-cell length b length_b	115.358 Å
Unit-cell length c length_c	63.462 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	109.79 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	2.050 Å
Low-resolution limit resolution_low	41.490 Å
R factor r_factor	0.1810
R_work r_work	0.1790
R_free r_free	0.2320

Description description	Electron transfer flavoprotein subunit alpha related protein
Molecular weight formula_weight	18222.3 kDa
Source method src_method	man
Copy count entity_count	4

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	5490

Crystal Structure of the Electron Transfer Flavoprotein Subunit Alpha related Protein Ta0212 from Thermoplasma acidophilum

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

Electron transfer flavoprotein subunit alpha related protein

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

3fet__assembly_2__model_1

3fet__assembly_2__model_1 | I(q)

3fet__assembly_2__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) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)

Source organism organism	Thermoplasma acidophilum
NCBI taxonomy ID ncbi_taxonomy_id	2303
Host organism host_organism	Escherichia coli

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	340

Crystal Structure of the Electron Transfer Flavoprotein Subunit Alpha related Protein Ta0212 from Thermoplasma acidophilum

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

Electron transfer flavoprotein subunit alpha related protein

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

3fet__assembly_2__model_1

3fet__assembly_2__model_1 | I(q)

3fet__assembly_2__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) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)